// backend/myfreecams_lookup_pause.go

package main

import (
	"strings"
	"sync"
	"time"
)

const mfcLookupBusyCooldown = 10 * time.Minute

var (
	mfcLookupPauseMu     sync.Mutex
	mfcLookupPausedUntil time.Time
	mfcLookupPauseReason string
)

func isMFCServersBusyMessage(msg string) bool {
	msg = strings.ToLower(strings.TrimSpace(msg))
	return strings.Contains(msg, "servers busy")
}

func pauseMFCLookups(reason string, d time.Duration) {
	if d <= 0 {
		d = mfcLookupBusyCooldown
	}

	reason = strings.TrimSpace(reason)
	if reason == "" {
		reason = "servers busy"
	}

	until := time.Now().Add(d)

	mfcLookupPauseMu.Lock()
	changed := until.After(mfcLookupPausedUntil)
	if changed {
		mfcLookupPausedUntil = until
		mfcLookupPauseReason = reason
	}
	mfcLookupPauseMu.Unlock()

	if changed {
		appLogln(
			"⏸️ [myfreecams] usernameLookup pausiert bis",
			until.Format("15:04:05"),
			"Grund:",
			reason,
		)
	}
}

func mfcLookupsPaused() (until time.Time, reason string, paused bool) {
	mfcLookupPauseMu.Lock()
	defer mfcLookupPauseMu.Unlock()

	now := time.Now()
	if mfcLookupPausedUntil.IsZero() || now.After(mfcLookupPausedUntil) {
		mfcLookupPausedUntil = time.Time{}
		mfcLookupPauseReason = ""
		return time.Time{}, "", false
	}

	return mfcLookupPausedUntil, mfcLookupPauseReason, true
}

func mfcLookupPausedError() error {
	until, reason, paused := mfcLookupsPaused()
	if !paused {
		return nil
	}

	if reason == "" {
		reason = "servers busy"
	}

	return appErrorf(
		"mfc usernameLookup pausiert bis %s: %s",
		until.Format("15:04:05"),
		reason,
	)
}

func clearMFCLookupPause(reason string) {
	reason = strings.TrimSpace(reason)
	if reason == "" {
		reason = "manual refresh"
	}

	mfcLookupPauseMu.Lock()
	wasPaused := !mfcLookupPausedUntil.IsZero()
	mfcLookupPausedUntil = time.Time{}
	mfcLookupPauseReason = ""
	mfcLookupPauseMu.Unlock()

	if wasPaused {
		appLogln("▶️ [myfreecams] usernameLookup Pause aufgehoben. Grund:", reason)
	}
}