package main

import (
	"bytes"
	"fmt"
	"image"
	"image/color"
	"image/draw"
	"image/png"
	"strings"
)

// trayStatus 汇总托盘展示所需的运行态。
type trayStatus struct {
	loggedIn bool
	online   bool
	syncing  bool
	pending  int
	unread   int
	todayDue int
	lastErr  string
	username string
}

func (a *App) collectTrayStatus() trayStatus {
	st := trayStatus{}
	if a.store == nil {
		return st
	}
	st.loggedIn = a.syncUserID() > 0
	st.online = a.syncOnline.Load()
	st.syncing = a.syncing.Load()
	st.username = a.store.Meta("sync_username")
	a.syncMu.Lock()
	st.lastErr = a.syncLastErr
	a.syncMu.Unlock()
	_ = a.store.db.QueryRow(`SELECT (SELECT COUNT(*) FROM todos WHERE dirty=1)
		+(SELECT COUNT(*) FROM tickets WHERE dirty=1)
		+(SELECT COUNT(*) FROM notes WHERE dirty=1)`).Scan(&st.pending)
	_ = a.store.db.QueryRow(`SELECT COUNT(*) FROM messages WHERE is_read=0`).Scan(&st.unread)
	if badges, e := a.GetNavBadges(); e == nil {
		st.todayDue = badges.TodayDue
	}
	return st
}

func (s trayStatus) tooltip(locale string) string {
	base := "年糕崽崽项目管理（PMS）"
	if locale == "en" {
		base = "Niangaozai PMS"
	}
	parts := []string{base}
	switch {
	case s.syncing:
		parts = append(parts, pick(locale, "同步中…", "Syncing…"))
	case !s.loggedIn:
		parts = append(parts, pick(locale, "未登录", "Signed out"))
	case s.lastErr != "":
		parts = append(parts, pick(locale, "同步异常", "Sync error"))
	case s.online:
		parts = append(parts, pick(locale, "在线", "Online"))
	default:
		parts = append(parts, pick(locale, "离线", "Offline"))
	}
	if s.pending > 0 {
		parts = append(parts, fmt.Sprintf(pick(locale, "待推送 %d", "Pending %d"), s.pending))
	}
	if s.unread > 0 {
		parts = append(parts, fmt.Sprintf(pick(locale, "未读 %d", "Unread %d"), s.unread))
	}
	if s.todayDue > 0 {
		parts = append(parts, fmt.Sprintf(pick(locale, "今日到期 %d", "Due today %d"), s.todayDue))
	}
	return strings.Join(parts, " · ")
}

func (s trayStatus) badgeColor() color.RGBA {
	switch {
	case s.syncing:
		return color.RGBA{R: 79, G: 157, B: 245, A: 255} // blue
	case s.lastErr != "":
		return color.RGBA{R: 240, G: 94, B: 104, A: 255} // red
	case !s.loggedIn:
		return color.RGBA{R: 146, G: 155, B: 172, A: 255} // muted
	case !s.online:
		return color.RGBA{R: 231, G: 189, B: 53, A: 255} // yellow
	case s.pending > 0 || s.unread > 0:
		return color.RGBA{R: 231, G: 189, B: 53, A: 255} // yellow attention
	default:
		return color.RGBA{R: 67, G: 201, B: 150, A: 255} // green
	}
}

func pick(locale, zh, en string) string {
	if locale == "en" {
		return en
	}
	return zh
}

// trayIconWithBadge 在应用图标右下角叠一个状态色点，供托盘 SetIcon 使用。
func trayIconWithBadge(src []byte, badge color.RGBA) []byte {
	img, e := png.Decode(bytes.NewReader(src))
	if e != nil {
		return src
	}
	b := img.Bounds()
	out := image.NewRGBA(b)
	draw.Draw(out, b, img, b.Min, draw.Src)
	size := b.Dx()
	if size < 8 {
		return src
	}
	r := size / 5
	if r < 3 {
		r = 3
	}
	cx := b.Max.X - r - size/12
	cy := b.Max.Y - r - size/12
	for y := cy - r; y <= cy+r; y++ {
		for x := cx - r; x <= cx+r; x++ {
			dx, dy := x-cx, y-cy
			if dx*dx+dy*dy > r*r {
				continue
			}
			// 外圈深色描边提升对比度。
			if dx*dx+dy*dy > (r-1)*(r-1) {
				out.Set(x, y, color.RGBA{0, 0, 0, 180})
			} else {
				out.Set(x, y, badge)
			}
		}
	}
	var buf bytes.Buffer
	if e := png.Encode(&buf, out); e != nil {
		return src
	}
	return buf.Bytes()
}