<?php

namespace App\Http\Controllers\Api\V1;

use App\Http\Controllers\Controller;
use App\Models\IntercomCall;
use App\Models\IntercomDevice;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;

/**
 * Modul Intercom: reuse pola ParkingOperationController.
 * Laravel HANYA urus signaling + log, BUKAN relay audio.
 * Audio diurus Go relay (UDP), Laravel cuma simpan metadata + path rekaman.
 */
class IntercomController extends Controller
{
    public function devices()
    {
        return IntercomDevice::orderBy('device_id')->get();
    }

    public function queue()
    {
        return IntercomCall::whereIn('status', ['waiting', 'active'])
            ->orderBy('requested_at')
            ->limit(20)->get();
    }

    public function history(Request $request)
    {
        return IntercomCall::orderByDesc('id')->limit($request->input('limit', 50))->get();
    }

    // Dipanggil Go relay saat ESP32 kirim MQTT intercom/request
    public function request(Request $request)
    {
        $data = $request->validate([
            'device_id' => 'required|string|max:20',
            'arah' => 'sometimes|string|in:in,out',
        ]);

        $deviceId = strtoupper($data['device_id']);

        $device = IntercomDevice::firstOrCreate(
            ['device_id' => $deviceId],
            ['nama' => $deviceId, 'status' => 'idle']
        );

        // Kalau device lagi active, tetap masuk antrean (tidak ditolak)
        $call = IntercomCall::create([
            'device_id' => $deviceId,
            'arah' => $data['arah'] ?? 'in',
            'status' => 'waiting',
            'requested_at' => now(),
        ]);

        $device->update(['status' => 'calling', 'last_seen_at' => now()]);

        Log::info("Intercom request {$deviceId} call_id={$call->id}");

        return response()->json(['status' => true, 'call_id' => $call->id, 'device_id' => $deviceId]);
    }

    // Admin klik [Terima] di dashboard
    public function accept(Request $request)
    {
        $data = $request->validate(['call_id' => 'required|integer']);
        $call = IntercomCall::findOrFail($data['call_id']);

        // Tutup sesi active lain di device yang sama (single private session)
        IntercomCall::where('device_id', $call->device_id)
            ->where('status', 'active')->update(['status' => 'ended', 'ended_at' => now(), 'ended_by' => 'admin-switch']);

        $call->update(['status' => 'active', 'started_at' => now()]);
        IntercomDevice::where('device_id', $call->device_id)->update(['status' => 'active']);

        // Go relay yang bertugas publish MQTT intercom/invite/{DEVICE} + buka UDP port.
        // Laravel cuma ubah status, tidak publish MQTT langsung.
        return response()->json(['status' => true, 'call' => $call]);
    }

    public function end(Request $request)
    {
        $data = $request->validate([
            'call_id' => 'required|integer',
            'ended_by' => 'sometimes|string|max:20',
            'recording_path' => 'sometimes|string|max:255',
        ]);

        $call = IntercomCall::findOrFail($data['call_id']);
        $now = now();
        $durasi = $call->started_at ? $now->diffInSeconds($call->started_at) : ($call->requested_at ? $now->diffInSeconds($call->requested_at) : 0);

        $call->update([
            'status' => $call->status === 'waiting' && ($data['ended_by'] ?? '') === 'timeout' ? 'missed' : 'ended',
            'ended_at' => $now,
            'durasi_detik' => $durasi,
            'ended_by' => $data['ended_by'] ?? 'admin',
            'recording_path' => $data['recording_path'] ?? $call->recording_path,
        ]);

        // Balikin status device ke idle kalau tidak ada sesi lain
        $masihAktif = IntercomCall::where('device_id', $call->device_id)->whereIn('status', ['waiting', 'active'])->exists();
        if (!$masihAktif) {
            IntercomDevice::where('device_id', $call->device_id)->update(['status' => 'idle']);
        }

        return response()->json(['status' => true, 'call' => $call]);
    }

    // Heartbeat / LWT dari Go relay: ESP32 online/offline
    public function heartbeat(Request $request)
    {
        $data = $request->validate([
            'device_id' => 'required|string|max:20',
            'status' => 'sometimes|string|max:20',
            'ip_address' => 'sometimes|string|max:45',
        ]);

        IntercomDevice::updateOrCreate(
            ['device_id' => strtoupper($data['device_id'])],
            ['status' => $data['status'] ?? 'idle', 'ip_address' => $data['ip_address'] ?? null, 'last_seen_at' => now()]
        );

        return response()->json(['status' => true]);
    }
}