package main

import (
	"database/sql"
	"errors"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"sort"
	"strconv"
	"strings"
	"sync"
	"time"

	_ "modernc.org/sqlite"
)

type Store struct {
	mu   sync.RWMutex
	db   *sql.DB
	path string
}

func defaultDBPath() (string, error) {
	dir, err := os.UserConfigDir()
	if err != nil {
		return "", err
	}
	dir = filepath.Join(dir, "CodeCount")
	if err = os.MkdirAll(dir, 0755); err != nil {
		return "", err
	}
	return filepath.Join(dir, "code-count.db"), nil
}

func OpenStore(path string) (*Store, error) {
	if path == "" {
		var err error
		path, err = defaultDBPath()
		if err != nil {
			return nil, err
		}
	}
	if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
		return nil, err
	}
	db, err := sql.Open("sqlite", path)
	if err != nil {
		return nil, err
	}
	db.SetMaxOpenConns(1)
	s := &Store{db: db, path: path}
	if err = s.migrate(); err != nil {
		db.Close()
		return nil, err
	}
	// 每次打开库：把上次异常退出留下的 running 任务标为失败（表不存在时忽略）。
	s.markInterruptedPackTasks()
	return s, nil
}

// schemaVersion 是当前本地库结构版本；仅当已记录版本低于它时才执行迁移语句，
// 避免应用每次启动都重复执行建表/回填（版本一致时启动零迁移）。
// v3：新增 festival_images（节日背景图本地缓存）。
// v4：todos/tickets 新增 history 生命周期轨迹列。
// v5：新增 ai_summaries（分析完成后 AI 生成的模块介绍）。
// v6：新增 day_briefs（工作台 AI 今日规划 / 下班日报）。
// v7：新增 launch_apps（启动台保存的应用与启停命令）。
// v8：todos/tickets 新增 team_id 团队共享列。
// v9：新增 launch_logs（启动台进程输出，仅本地，不同步）。
// v10：launch_apps 新增 icon（本地抓取的 favicon/logo dataURL）。
// v11：launch_apps 新增 category（我的应用分类筛选）。
// v12：launch_categories 一级分类；launch_apps.category_id；projects.icon；kind_icons。
// v13：pack_tasks / pack_task_logs（打包任务与控制台输出，仅本地，不同步）。
const schemaVersion = 13

func (s *Store) migrate() error {
	// PRAGMA 是连接级/文件级配置，不属于迁移，每次打开都需执行。
	for _, q := range []string{`PRAGMA journal_mode=WAL`, `PRAGMA foreign_keys=ON`} {
		if _, err := s.db.Exec(q); err != nil {
			return fmt.Errorf("database migration: %w", err)
		}
	}
	// 历史数据修正：早期同步日志把警告级别写成了 "warn"，统一为 "warning"。
	// 全新数据库此时表还不存在，忽略错误即可。
	_, _ = s.db.Exec(`UPDATE app_logs SET level='warning' WHERE level='warn'`)
	var applied int
	_ = s.db.QueryRow(`SELECT COALESCE(MAX(version),0) FROM schema_migrations`).Scan(&applied)
	if applied >= schemaVersion {
		return nil
	}
	stmts := []string{
		`CREATE TABLE IF NOT EXISTS schema_migrations(version INTEGER PRIMARY KEY, applied_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS settings(key TEXT PRIMARY KEY, value TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS project_groups(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL UNIQUE, created_at TEXT NOT NULL, updated_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS projects(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, path TEXT NOT NULL UNIQUE, description TEXT NOT NULL DEFAULT '', group_id INTEGER NOT NULL DEFAULT 1, created_at TEXT NOT NULL, updated_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS analysis_runs(id INTEGER PRIMARY KEY AUTOINCREMENT, project_id INTEGER NOT NULL, kind TEXT NOT NULL, status TEXT NOT NULL, started_at TEXT NOT NULL, completed_at TEXT, error TEXT, FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS language_stats(project_id INTEGER NOT NULL, name TEXT NOT NULL, files INTEGER NOT NULL, code INTEGER NOT NULL, comments INTEGER NOT NULL, blanks INTEGER NOT NULL, PRIMARY KEY(project_id,name), FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS file_entries(project_id INTEGER NOT NULL, path TEXT NOT NULL, name TEXT NOT NULL, extension TEXT NOT NULL, size INTEGER NOT NULL, is_dir INTEGER NOT NULL, parent TEXT NOT NULL, PRIMARY KEY(project_id,path), FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS git_commits(project_id INTEGER NOT NULL, hash TEXT NOT NULL, author TEXT NOT NULL, email TEXT NOT NULL, message TEXT NOT NULL, committed_at TEXT NOT NULL, added INTEGER NOT NULL, deleted INTEGER NOT NULL, PRIMARY KEY(project_id,hash), FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS git_refs(project_id INTEGER NOT NULL, name TEXT NOT NULL, hash TEXT NOT NULL, kind TEXT NOT NULL, is_current INTEGER NOT NULL, PRIMARY KEY(project_id,name), FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`DROP TABLE IF EXISTS commit_refs`,
		`CREATE TABLE IF NOT EXISTS contributors(project_id INTEGER NOT NULL, email TEXT NOT NULL, name TEXT NOT NULL, commits INTEGER NOT NULL, added INTEGER NOT NULL, deleted INTEGER NOT NULL, PRIMARY KEY(project_id,email), FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS project_insights(project_id INTEGER PRIMARY KEY, health_score INTEGER NOT NULL, generated_at TEXT NOT NULL, high INTEGER NOT NULL, medium INTEGER NOT NULL, low INTEGER NOT NULL, todo_count INTEGER NOT NULL, long_files INTEGER NOT NULL, large_files INTEGER NOT NULL, FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS insight_issues(project_id INTEGER NOT NULL, idx INTEGER NOT NULL, severity TEXT NOT NULL, type TEXT NOT NULL, title TEXT NOT NULL, detail TEXT NOT NULL, path TEXT NOT NULL DEFAULT '', line INTEGER NOT NULL DEFAULT 0, suggestion TEXT NOT NULL DEFAULT '', evidence TEXT NOT NULL DEFAULT '', PRIMARY KEY(project_id,idx), FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS exclusion_rules(id INTEGER PRIMARY KEY AUTOINCREMENT, pattern TEXT NOT NULL UNIQUE, category TEXT NOT NULL, builtin INTEGER NOT NULL DEFAULT 0)`,
		`CREATE TABLE IF NOT EXISTS app_logs(id INTEGER PRIMARY KEY AUTOINCREMENT, level TEXT NOT NULL, category TEXT NOT NULL, message TEXT NOT NULL, detail TEXT NOT NULL DEFAULT '', created_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS git_hotspots(project_id INTEGER NOT NULL, path TEXT NOT NULL, changes INTEGER NOT NULL, added INTEGER NOT NULL, deleted INTEGER NOT NULL, PRIMARY KEY(project_id,path), FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS todos(id INTEGER PRIMARY KEY AUTOINCREMENT, uuid TEXT NOT NULL UNIQUE, title TEXT NOT NULL, content TEXT NOT NULL DEFAULT '', project_id INTEGER NOT NULL DEFAULT 0, due_at TEXT NOT NULL DEFAULT '', priority TEXT NOT NULL DEFAULT 'medium', status TEXT NOT NULL DEFAULT 'open', reminded INTEGER NOT NULL DEFAULT 0, created_at TEXT NOT NULL, updated_at TEXT NOT NULL, deleted INTEGER NOT NULL DEFAULT 0, dirty INTEGER NOT NULL DEFAULT 1, history TEXT NOT NULL DEFAULT '', team_id INTEGER NOT NULL DEFAULT 0)`,
		`CREATE TABLE IF NOT EXISTS tickets(id INTEGER PRIMARY KEY AUTOINCREMENT, uuid TEXT NOT NULL UNIQUE, title TEXT NOT NULL, description TEXT NOT NULL DEFAULT '', type TEXT NOT NULL DEFAULT 'task', project_id INTEGER NOT NULL, start_at TEXT NOT NULL, due_at TEXT NOT NULL, status TEXT NOT NULL DEFAULT 'open', priority TEXT NOT NULL DEFAULT 'medium', reminded INTEGER NOT NULL DEFAULT 0, created_at TEXT NOT NULL, updated_at TEXT NOT NULL, deleted INTEGER NOT NULL DEFAULT 0, dirty INTEGER NOT NULL DEFAULT 1, history TEXT NOT NULL DEFAULT '', team_id INTEGER NOT NULL DEFAULT 0)`,
		`CREATE TABLE IF NOT EXISTS notes(id INTEGER PRIMARY KEY AUTOINCREMENT, uuid TEXT NOT NULL UNIQUE, content TEXT NOT NULL DEFAULT '', updated_at TEXT NOT NULL, deleted INTEGER NOT NULL DEFAULT 0, dirty INTEGER NOT NULL DEFAULT 1)`,
		`CREATE TABLE IF NOT EXISTS favorites(project_id INTEGER PRIMARY KEY, created_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS messages(id INTEGER PRIMARY KEY AUTOINCREMENT, kind TEXT NOT NULL, title TEXT NOT NULL, body TEXT NOT NULL DEFAULT '', source_type TEXT NOT NULL DEFAULT '', source_id INTEGER NOT NULL DEFAULT 0, is_read INTEGER NOT NULL DEFAULT 0, created_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS ai_conversations(id INTEGER PRIMARY KEY AUTOINCREMENT, project_id INTEGER NOT NULL DEFAULT 0, provider TEXT NOT NULL DEFAULT '', title TEXT NOT NULL, created_at TEXT NOT NULL, updated_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS ai_messages(id INTEGER PRIMARY KEY AUTOINCREMENT, conversation_id INTEGER NOT NULL, role TEXT NOT NULL, content TEXT NOT NULL, created_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS festival_images(fest_key TEXT PRIMARY KEY, value TEXT NOT NULL DEFAULT '', updated_at TEXT NOT NULL DEFAULT '', dirty INTEGER NOT NULL DEFAULT 0)`,
		`CREATE TABLE IF NOT EXISTS ai_summaries(project_id INTEGER NOT NULL, kind TEXT NOT NULL, content TEXT NOT NULL DEFAULT '', provider TEXT NOT NULL DEFAULT '', generated_at TEXT NOT NULL, PRIMARY KEY(project_id,kind), FOREIGN KEY(project_id) REFERENCES projects(id) ON DELETE CASCADE)`,
		`CREATE TABLE IF NOT EXISTS day_briefs(kind TEXT PRIMARY KEY, content TEXT NOT NULL DEFAULT '', provider TEXT NOT NULL DEFAULT '', generated_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS launch_apps(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, kind TEXT NOT NULL DEFAULT 'other', port INTEGER NOT NULL DEFAULT 0, dir TEXT NOT NULL DEFAULT '', start_cmd TEXT NOT NULL DEFAULT '', stop_cmd TEXT NOT NULL DEFAULT '', last_pid INTEGER NOT NULL DEFAULT 0, created_at TEXT NOT NULL, updated_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS launch_logs(id INTEGER PRIMARY KEY AUTOINCREMENT, app_id INTEGER NOT NULL, level TEXT NOT NULL DEFAULT 'info', line TEXT NOT NULL, created_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS launch_categories(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL UNIQUE, sort INTEGER NOT NULL DEFAULT 0, created_at TEXT NOT NULL)`,
		`CREATE TABLE IF NOT EXISTS kind_icons(kind TEXT PRIMARY KEY, value TEXT NOT NULL DEFAULT '', updated_at TEXT NOT NULL DEFAULT '')`,
		`CREATE TABLE IF NOT EXISTS pack_tasks(id TEXT PRIMARY KEY, title TEXT NOT NULL DEFAULT '', cmd TEXT NOT NULL DEFAULT '', dir TEXT NOT NULL DEFAULT '', status TEXT NOT NULL DEFAULT 'running', pid INTEGER NOT NULL DEFAULT 0, started_at TEXT NOT NULL DEFAULT '', ended_at TEXT NOT NULL DEFAULT '', error TEXT NOT NULL DEFAULT '')`,
		`CREATE TABLE IF NOT EXISTS pack_task_logs(id INTEGER PRIMARY KEY AUTOINCREMENT, task_id TEXT NOT NULL, line TEXT NOT NULL, created_at TEXT NOT NULL)`,
		`CREATE INDEX IF NOT EXISTS idx_launch_logs_app ON launch_logs(app_id, id DESC)`,
		`CREATE INDEX IF NOT EXISTS idx_pack_tasks_started ON pack_tasks(started_at DESC)`,
		`CREATE INDEX IF NOT EXISTS idx_pack_task_logs_task ON pack_task_logs(task_id, id)`,
		`CREATE INDEX IF NOT EXISTS idx_ai_messages_conv ON ai_messages(conversation_id)`,
		`CREATE INDEX IF NOT EXISTS idx_messages_read ON messages(is_read)`,
		`CREATE INDEX IF NOT EXISTS idx_todos_status ON todos(deleted,status)`,
		`CREATE INDEX IF NOT EXISTS idx_tickets_status ON tickets(deleted,status)`,
	}
	for _, q := range stmts {
		if _, err := s.db.Exec(q); err != nil {
			return fmt.Errorf("database migration: %w", err)
		}
	}
	if ok, err := s.columnExists("projects", "group_id"); err != nil {
		return err
	} else if !ok {
		if _, err = s.db.Exec(`ALTER TABLE projects ADD COLUMN group_id INTEGER NOT NULL DEFAULT 1`); err != nil {
			return fmt.Errorf("database migration: %w", err)
		}
	}
	// 待办/工单生命周期：history 存 JSON 状态轨迹（进入某状态的时间点）。
	for _, table := range []string{"todos", "tickets"} {
		if ok, err := s.columnExists(table, "history"); err != nil {
			return err
		} else if !ok {
			if _, err = s.db.Exec(`ALTER TABLE ` + table + ` ADD COLUMN history TEXT NOT NULL DEFAULT ''`); err != nil {
				return fmt.Errorf("database migration: %w", err)
			}
			// 存量数据补一个创建节点，保证时间线至少有起点。
			_, _ = s.db.Exec(`UPDATE ` + table + ` SET history='[{"status":"open","at":"'||created_at||'"}]' WHERE history=''`)
		}
	}
	// 团队共享：team_id>0 表示该条对团队管理员可见（0 私密）。
	for _, table := range []string{"todos", "tickets"} {
		if ok, err := s.columnExists(table, "team_id"); err != nil {
			return err
		} else if !ok {
			if _, err = s.db.Exec(`ALTER TABLE ` + table + ` ADD COLUMN team_id INTEGER NOT NULL DEFAULT 0`); err != nil {
				return fmt.Errorf("database migration: %w", err)
			}
		}
	}
	if ok, err := s.columnExists("launch_apps", "icon"); err != nil {
		return err
	} else if !ok {
		if _, err = s.db.Exec(`ALTER TABLE launch_apps ADD COLUMN icon TEXT NOT NULL DEFAULT ''`); err != nil {
			return fmt.Errorf("database migration: %w", err)
		}
	}
	if ok, err := s.columnExists("launch_apps", "category"); err != nil {
		return err
	} else if !ok {
		if _, err = s.db.Exec(`ALTER TABLE launch_apps ADD COLUMN category TEXT NOT NULL DEFAULT ''`); err != nil {
			return fmt.Errorf("database migration: %w", err)
		}
	}
	if ok, err := s.columnExists("launch_apps", "category_id"); err != nil {
		return err
	} else if !ok {
		if _, err = s.db.Exec(`ALTER TABLE launch_apps ADD COLUMN category_id INTEGER NOT NULL DEFAULT 0`); err != nil {
			return fmt.Errorf("database migration: %w", err)
		}
	}
	if ok, err := s.columnExists("projects", "icon"); err != nil {
		return err
	} else if !ok {
		if _, err = s.db.Exec(`ALTER TABLE projects ADD COLUMN icon TEXT NOT NULL DEFAULT ''`); err != nil {
			return fmt.Errorf("database migration: %w", err)
		}
	}
	_, _ = s.db.Exec(`INSERT OR IGNORE INTO project_groups(id,name,created_at,updated_at) VALUES(1,'My Projects',?,?)`, time.Now().Format(time.RFC3339), time.Now().Format(time.RFC3339))
	_, _ = s.db.Exec(`UPDATE projects SET group_id=1 WHERE group_id IS NULL OR group_id=0`)
	defaults := map[string][]string{"general": {".git", ".idea", ".vscode", "node_modules", "dist", "coverage", "*.min.js", "*.min.css", ".DS_Store"}, "php": {"vendor", "storage/framework", "bootstrap/cache", ".phpunit.cache"}, "go": {"go.sum"}, "vue": {".nuxt", ".next", ".output", "unpackage"}}
	for category, patterns := range defaults {
		for _, p := range patterns {
			_, _ = s.db.Exec(`INSERT OR IGNORE INTO exclusion_rules(pattern,category,builtin) VALUES(?,?,1)`, p, category)
		}
	}
	_, _ = s.db.Exec(`INSERT OR IGNORE INTO settings(key,value) VALUES('theme','dark'),('locale','zh-CN'),('gitScope','current'),('autoRefresh','true'),('glassOpacity','55'),('loadingStyle','fullscreen-orbit')`)
	_, _ = s.db.Exec(`UPDATE settings SET value='fullscreen-orbit' WHERE key='loadingStyle' AND value IN ('bar','fullscreen') AND NOT EXISTS(SELECT 1 FROM settings WHERE key='loadingStyleSet' AND value='true')`)
	_, _ = s.db.Exec(`INSERT OR IGNORE INTO schema_migrations(version,applied_at) VALUES(?,?)`, schemaVersion, time.Now().Format(time.RFC3339))
	// 旧版本曾写入英文日志；迁移时转换已知固定文案，Git 提交消息等用户内容不做修改。
	translations := map[string]string{"Application started": "应用程序启动", "Desktop runtime connected": "桌面运行时已连接", "Project saved": "项目保存成功", "Project save failed": "项目保存失败", "Project deleted": "项目删除成功", "Analysis completed": "项目分析完成", "Analysis failed": "项目分析失败", "Database initialized": "数据库初始化成功", "Database migrated": "数据库迁移成功"}
	for en, zh := range translations {
		_, _ = s.db.Exec(`UPDATE app_logs SET message=? WHERE message=?`, zh, en)
	}
	_, _ = s.db.Exec(`UPDATE app_logs SET category='系统' WHERE category='system'`)
	_, _ = s.db.Exec(`UPDATE app_logs SET category='数据库' WHERE category='database'`)
	_, _ = s.db.Exec(`UPDATE app_logs SET category='项目' WHERE category='project'`)
	_, _ = s.db.Exec(`UPDATE app_logs SET category='代码分析' WHERE category='analysis'`)
	_, _ = s.db.Exec(`UPDATE app_logs SET category='Git分析' WHERE category='git'`)
	return nil
}

func (s *Store) columnExists(table, column string) (bool, error) {
	rows, err := s.db.Query(`PRAGMA table_info(` + table + `)`)
	if err != nil {
		return false, err
	}
	defer rows.Close()
	for rows.Next() {
		var cid int
		var name, typ string
		var notNull, pk int
		var dflt sql.NullString
		if err = rows.Scan(&cid, &name, &typ, &notNull, &dflt, &pk); err != nil {
			return false, err
		}
		if name == column {
			return true, nil
		}
	}
	return false, rows.Err()
}

func normalizePath(p string) (string, error) {
	p = strings.TrimSpace(p)
	if p == "" {
		return "", errors.New("PATH_REQUIRED")
	}
	a, e := filepath.Abs(p)
	if e != nil {
		return "", e
	}
	a = filepath.Clean(a)
	if st, e := os.Stat(a); e != nil {
		if os.IsNotExist(e) {
			return "", coded("PROJECT_PATH_NOT_FOUND", e)
		}
		return "", coded("PROJECT_PATH_UNREADABLE", e)
	} else if !st.IsDir() {
		return "", coded("PROJECT_PATH_NOT_DIRECTORY", nil)
	}
	d, e := os.Open(a)
	if e != nil {
		return "", coded("PROJECT_PATH_UNREADABLE", e)
	}
	_, e = d.Readdirnames(1)
	_ = d.Close()
	if e != nil && !errors.Is(e, io.EOF) {
		return "", coded("PROJECT_PATH_UNREADABLE", e)
	}
	return a, nil
}
func now() string { return time.Now().Format(time.RFC3339) }

func (s *Store) ListProjectGroups() ([]ProjectGroup, error) {
	rows, e := s.db.Query(`SELECT id,name,created_at,updated_at FROM project_groups ORDER BY id=1 DESC, name COLLATE NOCASE`)
	if e != nil {
		return nil, e
	}
	defer rows.Close()
	out := []ProjectGroup{}
	for rows.Next() {
		var g ProjectGroup
		if e = rows.Scan(&g.ID, &g.Name, &g.CreatedAt, &g.UpdatedAt); e != nil {
			return nil, e
		}
		out = append(out, g)
	}
	return out, rows.Err()
}
func (s *Store) SaveProjectGroup(id int64, name string) (ProjectGroup, error) {
	name = strings.TrimSpace(name)
	if name == "" {
		return ProjectGroup{}, errors.New("PROJECT_GROUP_NAME_REQUIRED")
	}
	t := now()
	if id == 0 {
		r, e := s.db.Exec(`INSERT INTO project_groups(name,created_at,updated_at) VALUES(?,?,?)`, name, t, t)
		if e != nil {
			if strings.Contains(strings.ToLower(e.Error()), "unique") {
				return ProjectGroup{}, errors.New("PROJECT_GROUP_DUPLICATE")
			}
			return ProjectGroup{}, e
		}
		id, _ = r.LastInsertId()
	} else {
		if id == 1 {
			return ProjectGroup{}, errors.New("PROJECT_GROUP_DEFAULT_READONLY")
		}
		_, e := s.db.Exec(`UPDATE project_groups SET name=?,updated_at=? WHERE id=?`, name, t, id)
		if e != nil {
			if strings.Contains(strings.ToLower(e.Error()), "unique") {
				return ProjectGroup{}, errors.New("PROJECT_GROUP_DUPLICATE")
			}
			return ProjectGroup{}, e
		}
	}
	var g ProjectGroup
	e := s.db.QueryRow(`SELECT id,name,created_at,updated_at FROM project_groups WHERE id=?`, id).Scan(&g.ID, &g.Name, &g.CreatedAt, &g.UpdatedAt)
	return g, e
}
func (s *Store) DeleteProjectGroup(id int64) error {
	if id == 1 {
		return errors.New("PROJECT_GROUP_DEFAULT_READONLY")
	}
	tx, e := s.db.Begin()
	if e != nil {
		return e
	}
	defer tx.Rollback()
	if _, e = tx.Exec(`UPDATE projects SET group_id=1,updated_at=? WHERE group_id=?`, now(), id); e != nil {
		return e
	}
	if _, e = tx.Exec(`DELETE FROM project_groups WHERE id=?`, id); e != nil {
		return e
	}
	return tx.Commit()
}
func (s *Store) ListProjects(groupID int64) ([]Project, error) {
	q := `SELECT p.id,p.name,p.path,p.description,p.group_id,COALESCE(g.name,''),COALESCE(p.icon,''),p.created_at,p.updated_at FROM projects p LEFT JOIN project_groups g ON g.id=p.group_id`
	args := []any{}
	if groupID > 0 {
		q += ` WHERE p.group_id=?`
		args = append(args, groupID)
	}
	q += ` ORDER BY p.updated_at DESC`
	rows, e := s.db.Query(q, args...)
	if e != nil {
		return nil, e
	}
	out := []Project{}
	for rows.Next() {
		var p Project
		if e = rows.Scan(&p.ID, &p.Name, &p.Path, &p.Description, &p.GroupID, &p.GroupName, &p.Icon, &p.CreatedAt, &p.UpdatedAt); e != nil {
			rows.Close()
			return nil, e
		}
		out = append(out, p)
	}
	if e = rows.Err(); e != nil {
		rows.Close()
		return nil, e
	}
	if e = rows.Close(); e != nil {
		return nil, e
	}
	for i := range out {
		out[i].Stats, _ = s.projectStats(out[i].ID)
		out[i].Languages, _ = s.languages(out[i].ID)
	}
	return out, nil
}
func (s *Store) GetProject(id int64) (Project, error) {
	var p Project
	e := s.db.QueryRow(`SELECT p.id,p.name,p.path,p.description,p.group_id,COALESCE(g.name,''),COALESCE(p.icon,''),p.created_at,p.updated_at FROM projects p LEFT JOIN project_groups g ON g.id=p.group_id WHERE p.id=?`, id).Scan(&p.ID, &p.Name, &p.Path, &p.Description, &p.GroupID, &p.GroupName, &p.Icon, &p.CreatedAt, &p.UpdatedAt)
	if e != nil {
		return p, e
	}
	p.Stats, _ = s.projectStats(id)
	p.Languages, _ = s.languages(id)
	return p, nil
}
func (s *Store) SaveProject(id int64, in ProjectInput) (Project, error) {
	p, e := normalizePath(in.Path)
	if e != nil {
		return Project{}, e
	}
	name := strings.TrimSpace(in.Name)
	if name == "" {
		name = filepath.Base(p)
	}
	groupID := in.GroupID
	if groupID <= 0 {
		groupID = 1
	}
	var exists int
	if e = s.db.QueryRow(`SELECT COUNT(*) FROM project_groups WHERE id=?`, groupID).Scan(&exists); e != nil {
		return Project{}, e
	}
	if exists == 0 {
		return Project{}, errors.New("PROJECT_GROUP_NOT_FOUND")
	}
	t := now()
	if id == 0 {
		r, e := s.db.Exec(`INSERT INTO projects(name,path,description,group_id,created_at,updated_at) VALUES(?,?,?,?,?,?)`, name, p, in.Description, groupID, t, t)
		if e != nil {
			if strings.Contains(strings.ToLower(e.Error()), "unique") {
				return Project{}, coded("PROJECT_PATH_DUPLICATE", e)
			}
			return Project{}, coded("PROJECT_SAVE_FAILED", e)
		}
		id, _ = r.LastInsertId()
	} else {
		_, e = s.db.Exec(`UPDATE projects SET name=?,path=?,description=?,group_id=?,updated_at=? WHERE id=?`, name, p, in.Description, groupID, t, id)
		if e != nil {
			return Project{}, e
		}
	}
	return s.GetProject(id)
}
func (s *Store) DeleteProject(id int64) error {
	_, e := s.db.Exec(`DELETE FROM projects WHERE id=?`, id)
	return e
}
func (s *Store) projectStats(id int64) (ProjectStats, error) {
	var x ProjectStats
	e := s.db.QueryRow(`SELECT COALESCE(SUM(code+comments+blanks),0),COALESCE(SUM(code),0),COALESCE(SUM(comments),0),COALESCE(SUM(blanks),0),COALESCE(SUM(files),0) FROM language_stats WHERE project_id=?`, id).Scan(&x.TotalLines, &x.CodeLines, &x.CommentLines, &x.BlankLines, &x.FileCount)
	if e != nil {
		return x, e
	}
	_ = s.db.QueryRow(`SELECT COUNT(*),COALESCE(SUM(added),0),COALESCE(SUM(deleted),0),COUNT(DISTINCT email) FROM git_commits WHERE project_id=?`, id).Scan(&x.CommitCount, &x.AddedLines, &x.DeletedLines, &x.ContributorCount)
	_ = s.db.QueryRow(`SELECT COALESCE(MAX(completed_at),'') FROM analysis_runs WHERE project_id=? AND status='completed'`, id).Scan(&x.LastAnalyzed)
	return x, nil
}
func (s *Store) languages(id int64) ([]LanguageStat, error) {
	r, e := s.db.Query(`SELECT name,files,code,comments,blanks FROM language_stats WHERE project_id=? ORDER BY code DESC`, id)
	if e != nil {
		return nil, e
	}
	defer r.Close()
	o := []LanguageStat{}
	for r.Next() {
		var x LanguageStat
		if e = r.Scan(&x.Name, &x.Files, &x.Code, &x.Comments, &x.Blanks); e != nil {
			return nil, e
		}
		o = append(o, x)
	}
	return o, r.Err()
}
func (s *Store) Dashboard(groupID int64) (Dashboard, error) {
	var d Dashboard
	var e error
	if groupID > 0 {
		e = s.db.QueryRow(`SELECT COUNT(*),
			COALESCE((SELECT SUM(ls.code+ls.comments+ls.blanks) FROM language_stats ls JOIN projects p ON p.id=ls.project_id WHERE p.group_id=?),0),
			COALESCE((SELECT SUM(ls.code) FROM language_stats ls JOIN projects p ON p.id=ls.project_id WHERE p.group_id=?),0),
			COALESCE((SELECT SUM(ls.comments) FROM language_stats ls JOIN projects p ON p.id=ls.project_id WHERE p.group_id=?),0),
			COALESCE((SELECT SUM(ls.blanks) FROM language_stats ls JOIN projects p ON p.id=ls.project_id WHERE p.group_id=?),0),
			COALESCE((SELECT SUM(ls.files) FROM language_stats ls JOIN projects p ON p.id=ls.project_id WHERE p.group_id=?),0),
			COALESCE((SELECT COUNT(*) FROM git_commits gc JOIN projects p ON p.id=gc.project_id WHERE p.group_id=?),0),
			COALESCE((SELECT COUNT(DISTINCT gc.email) FROM git_commits gc JOIN projects p ON p.id=gc.project_id WHERE p.group_id=?),0)
			FROM projects WHERE group_id=?`, groupID, groupID, groupID, groupID, groupID, groupID, groupID, groupID).
			Scan(&d.Projects, &d.TotalLines, &d.CodeLines, &d.CommentLines, &d.BlankLines, &d.FileCount, &d.Commits, &d.Contributors)
	} else {
		e = s.db.QueryRow(`SELECT COUNT(*),
			COALESCE((SELECT SUM(code+comments+blanks) FROM language_stats),0),
			COALESCE((SELECT SUM(code) FROM language_stats),0),
			COALESCE((SELECT SUM(comments) FROM language_stats),0),
			COALESCE((SELECT SUM(blanks) FROM language_stats),0),
			COALESCE((SELECT SUM(files) FROM language_stats),0),
			COALESCE((SELECT COUNT(*) FROM git_commits),0),
			COALESCE((SELECT COUNT(DISTINCT email) FROM git_commits),0)
			FROM projects`).
			Scan(&d.Projects, &d.TotalLines, &d.CodeLines, &d.CommentLines, &d.BlankLines, &d.FileCount, &d.Commits, &d.Contributors)
	}
	if e != nil {
		return d, e
	}
	d.Languages, e = s.AggregateLanguages(groupID)
	return d, e
}

// AggregateLanguages 跨项目聚合语言分布；groupID>0 时仅统计该项目组。
func (s *Store) AggregateLanguages(groupID int64) ([]LanguageStat, error) {
	q := `SELECT ls.name,SUM(ls.files),SUM(ls.code),SUM(ls.comments),SUM(ls.blanks) FROM language_stats ls`
	args := []any{}
	if groupID > 0 {
		q += ` JOIN projects p ON p.id=ls.project_id WHERE p.group_id=?`
		args = append(args, groupID)
	}
	q += ` GROUP BY ls.name ORDER BY SUM(ls.code) DESC`
	r, e := s.db.Query(q, args...)
	if e != nil {
		return nil, e
	}
	defer r.Close()
	out := []LanguageStat{}
	for r.Next() {
		var x LanguageStat
		if e = r.Scan(&x.Name, &x.Files, &x.Code, &x.Comments, &x.Blanks); e != nil {
			return nil, e
		}
		out = append(out, x)
	}
	return out, r.Err()
}

func (s *Store) ReplaceScan(id int64, langs []LanguageStat, files []FileEntry) error {
	tx, e := s.db.Begin()
	if e != nil {
		return e
	}
	defer tx.Rollback()
	if _, e = tx.Exec(`DELETE FROM language_stats WHERE project_id=?`, id); e != nil {
		return e
	}
	if _, e = tx.Exec(`DELETE FROM file_entries WHERE project_id=?`, id); e != nil {
		return e
	}
	for _, x := range langs {
		if _, e = tx.Exec(`INSERT INTO language_stats VALUES(?,?,?,?,?,?)`, id, x.Name, x.Files, x.Code, x.Comments, x.Blanks); e != nil {
			return e
		}
	}
	for _, x := range files {
		if _, e = tx.Exec(`INSERT INTO file_entries VALUES(?,?,?,?,?,?,?)`, id, x.Path, x.Name, x.Extension, x.Size, boolInt(x.IsDir), x.Parent); e != nil {
			return e
		}
	}
	_, e = tx.Exec(`INSERT INTO analysis_runs(project_id,kind,status,started_at,completed_at) VALUES(?,'scan','completed',?,?)`, id, now(), now())
	if e != nil {
		return e
	}
	return tx.Commit()
}
func boolInt(v bool) int {
	if v {
		return 1
	}
	return 0
}
func (s *Store) Structure(id int64) (StructureStats, error) {
	r, e := s.db.Query(`SELECT path,name,extension,size,is_dir,parent FROM file_entries WHERE project_id=? ORDER BY path`, id)
	if e != nil {
		return StructureStats{}, e
	}
	defer r.Close()
	x := StructureStats{Files: []FileEntry{}, LargeFiles: []FileEntry{}}
	fm := map[string]*FolderStat{}
	em := map[string]*ExtensionStat{}
	for r.Next() {
		var f FileEntry
		var d int
		if e = r.Scan(&f.Path, &f.Name, &f.Extension, &f.Size, &d, &f.Parent); e != nil {
			return x, e
		}
		f.IsDir = d == 1
		x.Files = append(x.Files, f)
		if f.IsDir {
			x.TotalDirs++
			continue
		}
		x.TotalFiles++
		x.TotalSize += f.Size
		if f.Size >= 1024*1024 {
			x.LargeFiles = append(x.LargeFiles, f)
		}
		top := strings.Split(filepath.ToSlash(f.Path), "/")[0]
		if top == f.Name {
			top = "/"
		}
		if fm[top] == nil {
			fm[top] = &FolderStat{Name: top}
		}
		fm[top].Files++
		fm[top].Size += f.Size
		ext := f.Extension
		if ext == "" {
			ext = "(no extension)"
		}
		if em[ext] == nil {
			em[ext] = &ExtensionStat{Extension: ext}
		}
		em[ext].Files++
		em[ext].Size += f.Size
	}
	for _, v := range fm {
		x.Folders = append(x.Folders, *v)
	}
	for _, v := range em {
		x.Extensions = append(x.Extensions, *v)
	}
	sort.Slice(x.Folders, func(i, j int) bool { return x.Folders[i].Size > x.Folders[j].Size })
	sort.Slice(x.Extensions, func(i, j int) bool { return x.Extensions[i].Size > x.Extensions[j].Size })
	sort.Slice(x.LargeFiles, func(i, j int) bool { return x.LargeFiles[i].Size > x.LargeFiles[j].Size })
	return x, r.Err()
}

func (s *Store) Rules() ([]ExclusionRule, error) {
	r, e := s.db.Query(`SELECT id,pattern,category,builtin FROM exclusion_rules ORDER BY category,builtin DESC,pattern`)
	if e != nil {
		return nil, e
	}
	defer r.Close()
	o := []ExclusionRule{}
	for r.Next() {
		var x ExclusionRule
		var b int
		if e = r.Scan(&x.ID, &x.Pattern, &x.Category, &b); e != nil {
			return nil, e
		}
		x.Builtin = b == 1
		o = append(o, x)
	}
	return o, r.Err()
}
func (s *Store) AddRule(pattern, category string) (ExclusionRule, error) {
	pattern = strings.TrimSpace(pattern)
	if pattern == "" {
		return ExclusionRule{}, errors.New("PATTERN_REQUIRED")
	}
	if category == "" {
		category = "custom"
	}
	r, e := s.db.Exec(`INSERT INTO exclusion_rules(pattern,category,builtin) VALUES(?,?,0)`, pattern, category)
	if e != nil {
		return ExclusionRule{}, e
	}
	id, _ := r.LastInsertId()
	return ExclusionRule{ID: id, Pattern: pattern, Category: category}, nil
}
func (s *Store) DeleteRule(id int64) error {
	r, e := s.db.Exec(`DELETE FROM exclusion_rules WHERE id=? AND builtin=0`, id)
	if e != nil {
		return e
	}
	n, _ := r.RowsAffected()
	if n == 0 {
		return errors.New("BUILTIN_RULE")
	}
	return nil
}
func (s *Store) Log(level, category, message, detail string) {
	if level == "warn" {
		level = "warning" // UI 与统计只认 info/warning/error
	}
	_, _ = s.db.Exec(`INSERT INTO app_logs(level,category,message,detail,created_at) VALUES(?,?,?,?,?)`, level, category, message, detail, now())
}
func (s *Store) Logs(level string) ([]LogEntry, error) {
	q := `SELECT id,level,category,message,detail,created_at FROM app_logs`
	args := []any{}
	if level != "" && level != "all" {
		q += ` WHERE level=?`
		args = append(args, level)
	}
	q += ` ORDER BY id DESC LIMIT 500`
	r, e := s.db.Query(q, args...)
	if e != nil {
		return nil, e
	}
	defer r.Close()
	o := []LogEntry{}
	for r.Next() {
		var x LogEntry
		if e = r.Scan(&x.ID, &x.Level, &x.Category, &x.Message, &x.Detail, &x.CreatedAt); e != nil {
			return nil, e
		}
		o = append(o, x)
	}
	return o, r.Err()
}
func (s *Store) ClearLogs() error { _, e := s.db.Exec(`DELETE FROM app_logs`); return e }

// SearchLogs 支持关键词（消息/详情/分类）、级别、分类过滤和分页。
// 计数按当前关键词+分类统计（不含级别），供前端标签页展示。
func (s *Store) SearchLogs(query, level, category string, offset, limit int64) (LogPage, error) {
	page := LogPage{Items: []LogEntry{}}
	where, args := []string{}, []any{}
	if q := strings.TrimSpace(query); q != "" {
		where = append(where, `(message LIKE ? OR detail LIKE ? OR category LIKE ?)`)
		like := "%" + q + "%"
		args = append(args, like, like, like)
	}
	if category != "" && category != "all" {
		where = append(where, `category=?`)
		args = append(args, category)
	}
	base := ""
	if len(where) > 0 {
		base = " WHERE " + strings.Join(where, " AND ")
	}
	e := s.db.QueryRow(`SELECT COUNT(*),COALESCE(SUM(level='info'),0),COALESCE(SUM(level='warning'),0),COALESCE(SUM(level='error'),0) FROM app_logs`+base, args...).
		Scan(&page.Total, &page.Info, &page.Warning, &page.Error)
	if e != nil {
		return page, e
	}
	itemWhere, itemArgs := where, args
	if level != "" && level != "all" {
		itemWhere = append(append([]string{}, where...), `level=?`)
		itemArgs = append(append([]any{}, args...), level)
		switch level {
		case "info":
			page.Total = page.Info
		case "warning":
			page.Total = page.Warning
		case "error":
			page.Total = page.Error
		}
	}
	q := `SELECT id,level,category,message,detail,created_at FROM app_logs`
	if len(itemWhere) > 0 {
		q += ` WHERE ` + strings.Join(itemWhere, " AND ")
	}
	if limit <= 0 || limit > 200 {
		limit = 50
	}
	if offset < 0 {
		offset = 0
	}
	q += ` ORDER BY id DESC LIMIT ? OFFSET ?`
	itemArgs = append(itemArgs, limit, offset)
	r, e := s.db.Query(q, itemArgs...)
	if e != nil {
		return page, e
	}
	defer r.Close()
	for r.Next() {
		var x LogEntry
		if e = r.Scan(&x.ID, &x.Level, &x.Category, &x.Message, &x.Detail, &x.CreatedAt); e != nil {
			return page, e
		}
		page.Items = append(page.Items, x)
	}
	return page, r.Err()
}

// LogCategories 返回日志中出现过的分类，供筛选下拉框使用。
func (s *Store) LogCategories() ([]string, error) {
	r, e := s.db.Query(`SELECT DISTINCT category FROM app_logs ORDER BY category`)
	if e != nil {
		return nil, e
	}
	defer r.Close()
	out := []string{}
	for r.Next() {
		var c string
		if e = r.Scan(&c); e != nil {
			return nil, e
		}
		out = append(out, c)
	}
	return out, r.Err()
}
func (s *Store) Settings() (AppSettings, error) {
	x := AppSettings{DatabasePath: s.path, Theme: "dark", Locale: "zh-CN", GitScope: "current", AutoRefresh: true, GlassOpacity: 55, LoadingStyle: "fullscreen-orbit",
		MinimizeToTray: true, AutoUpdateMode: "daily", AutoUpdateInterval: 1, AutoUpdateTime: "09:00", AIProvider: "spark", ImageMode: "base64"}
	r, e := s.db.Query(`SELECT key,value FROM settings`)
	if e != nil {
		return x, e
	}
	defer r.Close()
	for r.Next() {
		var k, v string
		_ = r.Scan(&k, &v)
		switch k {
		case "theme":
			x.Theme = v
		case "locale":
			x.Locale = v
		case "gitScope":
			x.GitScope = v
		case "autoRefresh":
			x.AutoRefresh = v == "true"
		case "glassOpacity":
			if n, err := strconv.Atoi(v); err == nil && n >= 30 && n <= 75 {
				x.GlassOpacity = n
			}
		case "loadingStyle":
			if validLoadingStyle(v) {
				x.LoadingStyle = v
			}
		case "minimizeToTray":
			x.MinimizeToTray = v == "true"
		case "autoUpdateEnabled":
			x.AutoUpdateEnabled = v == "true"
		case "autoUpdateMode":
			if v == "daily" || v == "everyNDays" || v == "everyNHours" {
				x.AutoUpdateMode = v
			}
		case "autoUpdateInterval":
			if n, err := strconv.Atoi(v); err == nil && n >= 1 && n <= 720 {
				x.AutoUpdateInterval = n
			}
		case "aiProvider":
			if v == "spark" || v == "deepseek" {
				x.AIProvider = v
			}
		case "sparkKey":
			x.SparkKey = v
		case "deepSeekKey":
			x.DeepSeekKey = v
		case "syncApiKeys":
			x.SyncAPIKeys = v == "true"
		case "avatarMode":
			if v == "base64" || v == "url" || v == "path" {
				x.AvatarMode = v
			}
		case "avatarValue":
			x.AvatarValue = v
		case "imageMode":
			if v == "base64" || v == "path" || v == "server" {
				x.ImageMode = v
			}
		case "autoUpdateTime":
			if len(v) == 5 && v[2] == ':' {
				x.AutoUpdateTime = v
			}
		}
	}
	return x, nil
}
func (s *Store) SaveSettings(x AppSettings) error {
	if x.GlassOpacity < 30 || x.GlassOpacity > 75 {
		x.GlassOpacity = 55
	}
	if !validLoadingStyle(x.LoadingStyle) {
		x.LoadingStyle = "fullscreen-orbit"
	}
	if x.AutoUpdateInterval < 1 || x.AutoUpdateInterval > 720 {
		x.AutoUpdateInterval = 1
	}
	if x.AutoUpdateMode != "daily" && x.AutoUpdateMode != "everyNDays" && x.AutoUpdateMode != "everyNHours" {
		x.AutoUpdateMode = "daily"
	}
	if len(x.AutoUpdateTime) != 5 || x.AutoUpdateTime[2] != ':' {
		x.AutoUpdateTime = "09:00"
	}
	if x.AIProvider != "spark" && x.AIProvider != "deepseek" {
		x.AIProvider = "spark"
	}
	if x.ImageMode != "base64" && x.ImageMode != "path" && x.ImageMode != "server" {
		x.ImageMode = "base64"
	}
	vals := map[string]string{"theme": x.Theme, "locale": x.Locale, "gitScope": x.GitScope, "autoRefresh": fmt.Sprint(x.AutoRefresh), "glassOpacity": strconv.Itoa(x.GlassOpacity), "loadingStyle": x.LoadingStyle, "loadingStyleSet": "true",
		"minimizeToTray": fmt.Sprint(x.MinimizeToTray), "autoUpdateEnabled": fmt.Sprint(x.AutoUpdateEnabled), "autoUpdateMode": x.AutoUpdateMode, "autoUpdateInterval": strconv.Itoa(x.AutoUpdateInterval), "autoUpdateTime": x.AutoUpdateTime,
		"aiProvider": x.AIProvider, "sparkKey": x.SparkKey, "deepSeekKey": x.DeepSeekKey, "syncApiKeys": fmt.Sprint(x.SyncAPIKeys),
		"avatarMode": x.AvatarMode, "avatarValue": x.AvatarValue, "imageMode": x.ImageMode}
	if x.AvatarMode != "base64" && x.AvatarMode != "url" && x.AvatarMode != "path" {
		vals["avatarMode"], vals["avatarValue"] = "", ""
	}
	// API Key / 头像变化时记录修改时间，作为同步的 LWW 依据。
	if prev, e := s.Settings(); e == nil {
		if prev.SparkKey != x.SparkKey || prev.DeepSeekKey != x.DeepSeekKey {
			vals["api_keys_updated_at"] = nowRFC()
		}
		if prev.AvatarMode != vals["avatarMode"] || prev.AvatarValue != vals["avatarValue"] {
			vals["avatar_updated_at"] = nowRFC()
		}
	}
	tx, e := s.db.Begin()
	if e != nil {
		return e
	}
	defer tx.Rollback()
	for k, v := range vals {
		if _, e = tx.Exec(`INSERT INTO settings(key,value) VALUES(?,?) ON CONFLICT(key) DO UPDATE SET value=excluded.value`, k, v); e != nil {
			return e
		}
	}
	return tx.Commit()
}

// Meta 读取 settings 表中的任意键（用于内部状态，如上次自动更新时间）。
func (s *Store) Meta(key string) string {
	var v string
	_ = s.db.QueryRow(`SELECT value FROM settings WHERE key=?`, key).Scan(&v)
	return v
}

// SetMeta 写入 settings 表中的任意键。
func (s *Store) SetMeta(key, value string) error {
	_, e := s.db.Exec(`INSERT INTO settings(key,value) VALUES(?,?) ON CONFLICT(key) DO UPDATE SET value=excluded.value`, key, value)
	return e
}

func validLoadingStyle(v string) bool {
	switch v {
	case "bar", "fullscreen", "fullscreen-orbit", "fullscreen-grid", "fullscreen-warp":
		return true
	default:
		return false
	}
}
func (s *Store) ClearData(mode string, projectID int64) error {
	tx, e := s.db.Begin()
	if e != nil {
		return e
	}
	defer tx.Rollback()
	tables := []string{"language_stats", "file_entries", "git_commits", "git_refs", "contributors", "git_hotspots", "project_insights", "insight_issues", "analysis_runs"}
	if mode == "all" {
		tables = append(tables, "projects", "todos", "tickets", "notes", "favorites", "messages", "ai_conversations", "ai_messages")
	}
	for _, t := range tables {
		q := "DELETE FROM " + t
		args := []any{}
		if mode == "project" && t != "projects" {
			q += " WHERE project_id=?"
			args = append(args, projectID)
		}
		if _, e = tx.Exec(q, args...); e != nil {
			return e
		}
	}
	if mode == "all" {
		if _, e = tx.Exec(`DELETE FROM project_groups WHERE id<>1`); e != nil {
			return e
		}
	}
	return tx.Commit()
}

func (s *Store) ReplaceGit(id int64, g GitStats) error {
	tx, e := s.db.Begin()
	if e != nil {
		return e
	}
	defer tx.Rollback()
	for _, t := range []string{"git_commits", "git_refs", "contributors", "git_hotspots"} {
		if _, e = tx.Exec("DELETE FROM "+t+" WHERE project_id=?", id); e != nil {
			return e
		}
	}
	for _, c := range g.Commits {
		if _, e = tx.Exec(`INSERT INTO git_commits VALUES(?,?,?,?,?,?,?,?)`, id, c.Hash, c.Author, c.Email, c.Message, c.Date, c.Added, c.Deleted); e != nil {
			return e
		}
	}
	for _, r := range g.Refs {
		if _, e = tx.Exec(`INSERT INTO git_refs VALUES(?,?,?,?,?)`, id, r.Name, r.Hash, r.Kind, boolInt(r.Current)); e != nil {
			return e
		}
	}
	for _, c := range g.Contributors {
		if _, e = tx.Exec(`INSERT INTO contributors VALUES(?,?,?,?,?,?)`, id, c.Email, c.Name, c.Commits, c.Added, c.Deleted); e != nil {
			return e
		}
	}
	for _, h := range g.Hotspots {
		if _, e = tx.Exec(`INSERT INTO git_hotspots VALUES(?,?,?,?,?)`, id, h.Path, h.Changes, h.Added, h.Deleted); e != nil {
			return e
		}
	}
	_, e = tx.Exec(`INSERT INTO analysis_runs(project_id,kind,status,started_at,completed_at) VALUES(?,'git','completed',?,?)`, id, now(), now())
	if e != nil {
		return e
	}
	return tx.Commit()
}

// MergeGit 增量合并新提交：追加提交与热点，替换引用，再从提交表重算贡献者。
func (s *Store) MergeGit(id int64, g GitStats) error {
	tx, e := s.db.Begin()
	if e != nil {
		return e
	}
	defer tx.Rollback()
	for _, c := range g.Commits {
		if _, e = tx.Exec(`INSERT INTO git_commits VALUES(?,?,?,?,?,?,?,?)
			ON CONFLICT(project_id,hash) DO UPDATE SET author=excluded.author,email=excluded.email,message=excluded.message,committed_at=excluded.committed_at,added=excluded.added,deleted=excluded.deleted`,
			id, c.Hash, c.Author, c.Email, c.Message, c.Date, c.Added, c.Deleted); e != nil {
			return e
		}
	}
	if _, e = tx.Exec(`DELETE FROM git_refs WHERE project_id=?`, id); e != nil {
		return e
	}
	for _, r := range g.Refs {
		if _, e = tx.Exec(`INSERT INTO git_refs VALUES(?,?,?,?,?)`, id, r.Name, r.Hash, r.Kind, boolInt(r.Current)); e != nil {
			return e
		}
	}
	for _, h := range g.Hotspots {
		if _, e = tx.Exec(`INSERT INTO git_hotspots VALUES(?,?,?,?,?)
			ON CONFLICT(project_id,path) DO UPDATE SET changes=changes+excluded.changes,added=added+excluded.added,deleted=deleted+excluded.deleted`,
			id, h.Path, h.Changes, h.Added, h.Deleted); e != nil {
			return e
		}
	}
	if _, e = tx.Exec(`DELETE FROM contributors WHERE project_id=?`, id); e != nil {
		return e
	}
	if _, e = tx.Exec(`INSERT INTO contributors(project_id,email,name,commits,added,deleted)
		SELECT project_id,email,MAX(author),COUNT(*),SUM(added),SUM(deleted) FROM git_commits WHERE project_id=? GROUP BY email`, id); e != nil {
		return e
	}
	_, e = tx.Exec(`INSERT INTO analysis_runs(project_id,kind,status,started_at,completed_at) VALUES(?,'git','completed',?,?)`, id, now(), now())
	if e != nil {
		return e
	}
	return tx.Commit()
}

// LatestCommitHash 返回项目已入库的最新提交哈希，用于增量分析起点。
func (s *Store) LatestCommitHash(id int64) string {
	var h string
	_ = s.db.QueryRow(`SELECT hash FROM git_commits WHERE project_id=? ORDER BY committed_at DESC LIMIT 1`, id).Scan(&h)
	return h
}
func (s *Store) GitStats(id int64) (GitStats, error) {
	g := GitStats{Available: true, Commits: []GitCommit{}, Refs: []GitRef{}, Contributors: []Contributor{}, Heatmap: []HeatDay{}, Hotspots: []GitFileHotspot{}}
	r, e := s.db.Query(`SELECT hash,author,email,message,committed_at,added,deleted FROM git_commits WHERE project_id=? ORDER BY committed_at DESC`, id)
	if e != nil {
		return g, e
	}
	for r.Next() {
		var c GitCommit
		if e = r.Scan(&c.Hash, &c.Author, &c.Email, &c.Message, &c.Date, &c.Added, &c.Deleted); e != nil {
			r.Close()
			return g, e
		}
		g.Commits = append(g.Commits, c)
		g.Added += c.Added
		g.Deleted += c.Deleted
	}
	r.Close()
	rr, e := s.db.Query(`SELECT name,hash,kind,is_current FROM git_refs WHERE project_id=? ORDER BY is_current DESC,kind,name`, id)
	if e != nil {
		return g, e
	}
	for rr.Next() {
		var x GitRef
		var c int
		_ = rr.Scan(&x.Name, &x.Hash, &x.Kind, &c)
		x.Current = c == 1
		if x.Current {
			g.CurrentBranch = x.Name
		}
		g.Refs = append(g.Refs, x)
	}
	rr.Close()
	g.WorkspaceBranch = g.CurrentBranch
	g.ViewRef = g.CurrentBranch
	cr, e := s.db.Query(`SELECT name,email,commits,added,deleted FROM contributors WHERE project_id=? ORDER BY commits DESC`, id)
	if e != nil {
		return g, e
	}
	for cr.Next() {
		var x Contributor
		_ = cr.Scan(&x.Name, &x.Email, &x.Commits, &x.Added, &x.Deleted)
		g.Contributors = append(g.Contributors, x)
	}
	cr.Close()
	g.CommitCount = int64(len(g.Commits))
	g.ContributorCount = int64(len(g.Contributors))
	cut := time.Now().AddDate(-1, 0, 0)
	hm := map[string]*HeatDay{}
	for _, c := range g.Commits {
		if t, e := time.Parse(time.RFC3339, c.Date); e == nil && t.After(cut) {
			key := t.Local().Format("2006-01-02")
			d := hm[key]
			if d == nil {
				d = &HeatDay{Date: key}
				hm[key] = d
			}
			d.Count++
			d.Added += c.Added
			d.Deleted += c.Deleted
		}
	}
	for _, d := range hm {
		g.Heatmap = append(g.Heatmap, *d)
	}
	sort.Slice(g.Heatmap, func(i, j int) bool { return g.Heatmap[i].Date < g.Heatmap[j].Date })
	hr, e := s.db.Query(`SELECT path,changes,added,deleted FROM git_hotspots WHERE project_id=? ORDER BY changes DESC,added+deleted DESC LIMIT 20`, id)
	if e != nil {
		return g, e
	}
	for hr.Next() {
		var h GitFileHotspot
		_ = hr.Scan(&h.Path, &h.Changes, &h.Added, &h.Deleted)
		g.Hotspots = append(g.Hotspots, h)
	}
	hr.Close()
	return g, nil
}

func (s *Store) Insights(id int64) (ProjectInsights, error) {
	x := ProjectInsights{ProjectID: id, Issues: []InsightIssue{}}
	e := s.db.QueryRow(`SELECT health_score,generated_at,high,medium,low,todo_count,long_files,large_files FROM project_insights WHERE project_id=?`, id).Scan(&x.HealthScore, &x.GeneratedAt, &x.Summary.High, &x.Summary.Medium, &x.Summary.Low, &x.Summary.TodoCount, &x.Summary.LongFiles, &x.Summary.LargeFiles)
	if e != nil {
		return x, e
	}
	r, e := s.db.Query(`SELECT severity,type,title,detail,path,line,suggestion,evidence FROM insight_issues WHERE project_id=? ORDER BY idx`, id)
	if e != nil {
		return x, e
	}
	defer r.Close()
	for r.Next() {
		var issue InsightIssue
		if e = r.Scan(&issue.Severity, &issue.Type, &issue.Title, &issue.Detail, &issue.Path, &issue.Line, &issue.Suggestion, &issue.Evidence); e != nil {
			return x, e
		}
		x.Issues = append(x.Issues, issue)
	}
	return x, nil
}

func (s *Store) ReplaceInsights(id int64, x ProjectInsights) error {
	tx, e := s.db.Begin()
	if e != nil {
		return e
	}
	defer tx.Rollback()
	if _, e = tx.Exec(`DELETE FROM insight_issues WHERE project_id=?`, id); e != nil {
		return e
	}
	if _, e = tx.Exec(`DELETE FROM project_insights WHERE project_id=?`, id); e != nil {
		return e
	}
	if _, e = tx.Exec(`INSERT INTO project_insights VALUES(?,?,?,?,?,?,?,?,?)`, id, x.HealthScore, x.GeneratedAt, x.Summary.High, x.Summary.Medium, x.Summary.Low, x.Summary.TodoCount, x.Summary.LongFiles, x.Summary.LargeFiles); e != nil {
		return e
	}
	for i, issue := range x.Issues {
		if _, e = tx.Exec(`INSERT INTO insight_issues VALUES(?,?,?,?,?,?,?,?,?,?)`, id, i, issue.Severity, issue.Type, issue.Title, issue.Detail, issue.Path, issue.Line, issue.Suggestion, issue.Evidence); e != nil {
			return e
		}
	}
	return tx.Commit()
}