package main

import (
	"fmt"
	"net/url"
	"sort"
	"strings"
	"time"
)

type autoStartItem struct {
	userKey string
	url     string
}

func normUser(s string) string {
	return strings.ToLower(strings.TrimSpace(s))
}

func chaturbateUserFromURL(raw string) string {
	raw = strings.TrimSpace(raw)
	if raw == "" {
		return ""
	}
	u, err := url.Parse(raw)
	if err != nil || u.Hostname() == "" {
		return ""
	}
	host := strings.ToLower(u.Hostname())
	if !strings.Contains(host, "chaturbate.com") {
		return ""
	}
	parts := strings.Split(u.Path, "/")
	for _, p := range parts {
		p = strings.TrimSpace(p)
		if p != "" {
			return normUser(p)
		}
	}
	return ""
}

func cookieHeaderFromSettings(s RecorderSettings) string {
	m, err := decryptCookieMap(s.EncryptedCookies)
	if err != nil || len(m) == 0 {
		return ""
	}
	keys := make([]string, 0, len(m))
	for k := range m {
		keys = append(keys, k)
	}
	sort.Strings(keys)

	var b strings.Builder
	for i, k := range keys {
		v := strings.TrimSpace(m[k])
		if k == "" || v == "" {
			continue
		}
		if i > 0 {
			b.WriteString("; ")
		}
		b.WriteString(k)
		b.WriteString("=")
		b.WriteString(v)
	}
	return b.String()
}

func resolveChaturbateURL(m WatchedModelLite) string {
	in := strings.TrimSpace(m.Input)
	if strings.HasPrefix(strings.ToLower(in), "http://") || strings.HasPrefix(strings.ToLower(in), "https://") {
		return in
	}
	key := strings.Trim(strings.TrimSpace(m.ModelKey), "/")
	if key == "" {
		return ""
	}
	return fmt.Sprintf("https://chaturbate.com/%s/", key)
}

// Startet watched+online(public) automatisch – unabhängig vom Frontend
func startChaturbateAutoStartWorker(store *ModelStore) {
	if store == nil {
		fmt.Println("⚠️ [autostart] model store is nil")
		return
	}

	const pollInterval = 5 * time.Second
	const startGap = 5 * time.Second
	const retryCooldown = 25 * time.Second

	queue := make([]autoStartItem, 0, 64)
	queued := map[string]bool{}
	lastTry := map[string]time.Time{}
	var lastStart time.Time

	for {
		if isAutostartPaused() {
			// optional: Queue behalten oder leeren – ich würde sie behalten.
			time.Sleep(2 * time.Second)
			continue
		}

		s := getSettings()
		// ✅ Autostart nur wenn Feature aktiviert ist
		// (optional zusätzlich AutoAddToDownloadList wie im Frontend logisch gekoppelt)
		if !s.UseChaturbateAPI || !s.AutoStartAddedDownloads || !s.AutoAddToDownloadList {
			queue = queue[:0]
			queued = map[string]bool{}
			time.Sleep(2 * time.Second)
			continue
		}

		cookieHdr := cookieHeaderFromSettings(s)
		// ohne cf_clearance + session_* keine Autostarts (gleiches Kriterium wie runJob)
		if !hasChaturbateCookies(cookieHdr) {
			time.Sleep(5 * time.Second)
			continue
		}

		// online snapshot aus cache
		cbMu.RLock()
		rooms := append([]ChaturbateRoom(nil), cb.Rooms...)
		cbMu.RUnlock()

		showByUser := map[string]string{}
		for _, r := range rooms {
			showByUser[normUser(r.Username)] = strings.ToLower(strings.TrimSpace(r.CurrentShow))
		}

		// running users (damit wir nicht doppelt starten)
		running := map[string]bool{}
		jobsMu.Lock()
		for _, j := range jobs {
			if j == nil || j.Status != JobRunning {
				continue
			}
			u := chaturbateUserFromURL(j.SourceURL)
			if u != "" {
				running[u] = true
			}
		}
		jobsMu.Unlock()

		// watched list aus DB
		watched := store.ListWatchedLite("chaturbate.com")
		watchedByUser := map[string]WatchedModelLite{}
		for _, m := range watched {
			key := normUser(m.ModelKey)
			if key != "" && m.Watching {
				watchedByUser[key] = m
			}
		}

		// queue prune
		nextQueue := queue[:0]
		nextQueued := map[string]bool{}
		for _, it := range queue {
			m, ok := watchedByUser[it.userKey]
			if !ok {
				continue
			}
			if showByUser[it.userKey] == "" {
				continue
			}
			if running[it.userKey] {
				continue
			}
			it.url = resolveChaturbateURL(m)
			if it.url == "" {
				continue
			}
			nextQueue = append(nextQueue, it)
			nextQueued[it.userKey] = true
		}
		queue = nextQueue
		queued = nextQueued

		// enqueue new public watched
		now := time.Now()
		for user, m := range watchedByUser {
			if showByUser[user] != "public" {
				continue
			}
			if running[user] {
				continue
			}
			if queued[user] {
				continue
			}
			if t, ok := lastTry[user]; ok && now.Sub(t) < retryCooldown {
				continue
			}

			u := resolveChaturbateURL(m)
			if u == "" {
				continue
			}
			queue = append(queue, autoStartItem{userKey: user, url: u})
			queued[user] = true
		}

		// starte max. einen Job pro Loop (mit Abstand)
		if len(queue) > 0 && (lastStart.IsZero() || time.Since(lastStart) >= startGap) {
			it := queue[0]
			queue = queue[1:]
			delete(queued, it.userKey)
			lastTry[it.userKey] = time.Now()

			_, err := startRecordingInternal(RecordRequest{
				URL:    it.url,
				Cookie: cookieHdr,
			})
			if err != nil {
				fmt.Println("❌ [autostart] start failed:", it.url, err)
			} else {
				fmt.Println("▶️ [autostart] started:", it.url)
				lastStart = time.Now()
			}
		}

		time.Sleep(pollInterval)
	}
}