package logic

import (
	"context"
	"strings"

	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/frame/g"

	adminv1 "tool-api/api/admin/v1"
	"tool-api/internal/consts"
)

// ============================================================================
// 管理端系统配置（迭代-2026-09-29）
//
// 走 settings 表（约定 S9：配置一律走 settings 表，不写 config.yaml）。
// 只开放白名单键：管理端可读可写的键集中在这里登记，避免把 settings 全表暴露。
// ============================================================================

// adminSettingWhitelist 管理端可读写的配置键白名单
var adminSettingWhitelist = []struct {
	Key    string
	Remark string
	// Normalize 保存前的归一化（可为 nil）
	Normalize func(string) string
}{
	{
		Key:    consts.SettingSiteBaseUrl,
		Remark: "图片等静态资源的对外拼接前缀（如 https://api.example.com），留空 = 按请求域名动态拼接",
		Normalize: func(v string) string {
			return strings.TrimRight(strings.TrimSpace(v), "/")
		},
	},
	{
		Key:    consts.SettingHomeFeatureCovers,
		Remark: "首页便捷功能卡背景图，JSON：{\"note\":\"/static/...\",\"event\":\"...\"}（key 对齐小程序 features.ts）",
		Normalize: func(v string) string {
			return strings.TrimSpace(v)
		},
	},
}

// AdminSettingGet 读取白名单配置项（含当前值与说明）
func AdminSettingGet(ctx context.Context) (*adminv1.AdminSettingGetRes, error) {
	res := &adminv1.AdminSettingGetRes{Items: make([]adminv1.AdminSettingItem, 0, len(adminSettingWhitelist))}
	for _, def := range adminSettingWhitelist {
		res.Items = append(res.Items, adminv1.AdminSettingItem{
			Key:    def.Key,
			Value:  SettingValue(ctx, def.Key),
			Remark: def.Remark,
		})
	}
	return res, nil
}

// AdminSettingSave 保存一项配置（key 必须在白名单内；保存立即生效，SettingValue 缓存同步失效）
func AdminSettingSave(ctx context.Context, key, value string) (*adminv1.AdminSettingSaveRes, error) {
	for _, def := range adminSettingWhitelist {
		if def.Key != key {
			continue
		}
		v := value
		if def.Normalize != nil {
			v = def.Normalize(v)
		}
		before := SettingValue(ctx, key)
		if err := SettingSave(ctx, key, v, def.Remark); err != nil {
			return nil, err
		}
		WriteAudit(ctx, AuditEntry{
			Action:     "setting.save",
			TargetType: "setting",
			TargetId:   key,
			Before:     g.Map{"v": before},
			After:      g.Map{"v": v},
			Result:     consts.AuditResultSuccess,
		})
		return &adminv1.AdminSettingSaveRes{}, nil
	}
	return nil, gerror.New("不支持的配置项")
}