package tray

import (
	"fmt"
	"log"

	"github.com/energye/systray"

	"git.davoryn.de/calic/syncwarden/internal/config"
	st "git.davoryn.de/calic/syncwarden/internal/syncthing"
)

// buildMenu creates the full context menu.
func (a *App) buildMenu() {
	// Status info section
	a.statusItem = systray.AddMenuItem("Status: Connecting...", "")
	a.statusItem.Disable()

	a.rateItem = systray.AddMenuItem("↓ 0 B/s  ↑ 0 B/s", "")
	a.rateItem.Disable()

	a.devicesItem = systray.AddMenuItem("Devices: —", "")
	a.devicesItem.Disable()

	a.lastSyncItem = systray.AddMenuItem("Last sync: —", "")
	a.lastSyncItem.Disable()

	if a.syncthingMissing {
		mInstall := systray.AddMenuItem("Install Syncthing...", "Download Syncthing")
		mInstall.Click(func() {
			openBrowser(st.DownloadURL)
		})
	}

	systray.AddSeparator()

	// Open Admin Panel
	mOpenPanel := systray.AddMenuItem("Open Admin Panel", "Open Syncthing admin panel")
	mOpenPanel.Click(func() {
		a.openPanel()
	})

	// Pause/Resume toggle
	a.pauseItem = systray.AddMenuItem("Pause All", "Pause/Resume all syncing")
	a.pauseItem.Click(func() {
		a.togglePause()
	})

	systray.AddSeparator()

	// Folders submenu
	a.foldersMenu = systray.AddMenuItem("Folders", "")
	emptyFolder := a.foldersMenu.AddSubMenuItem("(loading...)", "")
	emptyFolder.Disable()
	a.folderItems = []*systray.MenuItem{emptyFolder}

	// Recent Files submenu
	a.recentMenu = systray.AddMenuItem("Recent Files", "")
	emptyRecent := a.recentMenu.AddSubMenuItem("(none)", "")
	emptyRecent.Disable()
	a.recentItems = []*systray.MenuItem{emptyRecent}

	// Conflicts
	a.conflictItem = systray.AddMenuItem("Conflicts (0)", "Open conflicts page")
	a.conflictItem.Hide()
	a.conflictItem.Click(func() {
		a.openConflicts()
	})

	systray.AddSeparator()

	// Actions
	mRescan := systray.AddMenuItem("Rescan All", "Trigger rescan of all folders")
	mRescan.Click(func() {
		go func() {
			if err := a.client.RescanAll(); err != nil {
				log.Printf("rescan error: %v", err)
			}
		}()
	})

	mRestart := systray.AddMenuItem("Restart Syncthing", "Restart the Syncthing process")
	mRestart.Click(func() {
		go func() {
			if err := a.client.Restart(); err != nil {
				log.Printf("restart error: %v", err)
			}
		}()
	})

	systray.AddSeparator()

	// Settings submenu
	mSettings := systray.AddMenuItem("Settings", "")

	chkNotify := mSettings.AddSubMenuItem("Notifications", "Enable/disable notifications")
	if a.cfg.EnableNotifications {
		chkNotify.Check()
	}
	chkNotify.Click(func() {
		a.toggleSetting(&a.cfg.EnableNotifications, chkNotify)
	})

	chkRecent := mSettings.AddSubMenuItem("Show Recent Files", "Show recently synced files")
	if a.cfg.EnableRecentFiles {
		chkRecent.Check()
	}
	chkRecent.Click(func() {
		a.toggleSetting(&a.cfg.EnableRecentFiles, chkRecent)
	})

	chkConflict := mSettings.AddSubMenuItem("Conflict Alerts", "Alert on sync conflicts")
	if a.cfg.EnableConflictAlerts {
		chkConflict.Check()
	}
	chkConflict.Click(func() {
		a.toggleSetting(&a.cfg.EnableConflictAlerts, chkConflict)
	})

	chkRate := mSettings.AddSubMenuItem("Transfer Rate in Tooltip", "Show transfer rate in tooltip")
	if a.cfg.EnableTransferRate {
		chkRate.Check()
	}
	chkRate.Click(func() {
		a.toggleSetting(&a.cfg.EnableTransferRate, chkRate)
	})

	chkAutoStart := mSettings.AddSubMenuItem("Auto-start Syncthing", "Start Syncthing when SyncWarden starts")
	if a.cfg.AutoStartSyncthing {
		chkAutoStart.Check()
	}
	chkAutoStart.Click(func() {
		a.toggleSetting(&a.cfg.AutoStartSyncthing, chkAutoStart)
	})

	chkLogin := mSettings.AddSubMenuItem("Start on Login", "Start SyncWarden at system login")
	if a.cfg.StartOnLogin {
		chkLogin.Check()
	}
	chkLogin.Click(func() {
		a.toggleSetting(&a.cfg.StartOnLogin, chkLogin)
	})

	// API key info
	apiKeyDisplay := "API Key: (none)"
	if len(a.cfg.SyncthingAPIKey) > 8 {
		apiKeyDisplay = fmt.Sprintf("API Key: %s...%s", a.cfg.SyncthingAPIKey[:4], a.cfg.SyncthingAPIKey[len(a.cfg.SyncthingAPIKey)-4:])
	} else if a.cfg.SyncthingAPIKey != "" {
		apiKeyDisplay = fmt.Sprintf("API Key: %s", a.cfg.SyncthingAPIKey)
	}
	mAPIKey := mSettings.AddSubMenuItem(apiKeyDisplay, "")
	mAPIKey.Disable()

	mRediscover := mSettings.AddSubMenuItem("Re-discover API Key", "Re-read API key from Syncthing config")
	mRediscover.Click(func() {
		go a.rediscoverAPIKey()
	})

	mAddr := mSettings.AddSubMenuItem(fmt.Sprintf("Address: %s", a.cfg.SyncthingAddress), "")
	mAddr.Disable()

	// About
	mAbout := systray.AddMenuItem(fmt.Sprintf("About (v%s)", version), "")
	mAbout.Disable()

	systray.AddSeparator()

	// Quit
	mQuit := systray.AddMenuItem("Quit", "Exit SyncWarden")
	mQuit.Click(func() {
		log.Println("Quit clicked")
		systray.Quit()
	})
}

func (a *App) togglePause() {
	a.mu.Lock()
	paused := a.lastStatus.Paused
	a.mu.Unlock()

	go func() {
		var err error
		if paused {
			err = a.client.ResumeAll()
		} else {
			err = a.client.PauseAll()
		}
		if err != nil {
			log.Printf("pause/resume error: %v", err)
		}
	}()
}

func (a *App) openConflicts() {
	// Open the Syncthing conflicts page in the panel
	launchPanel(a.cfg.BaseURL())
}

func (a *App) toggleSetting(field *bool, item *systray.MenuItem) {
	a.mu.Lock()
	*field = !*field
	val := *field
	cfg := a.cfg
	a.mu.Unlock()

	if val {
		item.Check()
	} else {
		item.Uncheck()
	}
	_ = config.Save(cfg)
}

func (a *App) rediscoverAPIKey() {
	key, err := st.DiscoverAPIKey()
	if err != nil {
		log.Printf("API key discovery failed: %v", err)
		return
	}
	if key == "" {
		log.Println("no API key found in Syncthing config")
		return
	}

	a.mu.Lock()
	a.cfg.SyncthingAPIKey = key
	a.mu.Unlock()

	a.client.SetAPIKey(key)
	_ = config.Save(a.cfg)
	log.Printf("re-discovered API key")
}