<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Guest;
use App\Models\GuestVisit;
use App\Models\GuestTag;
use App\Models\GuestNote;
use App\Services\GuestSearch;
use App\Services\CrossSellEngine;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;
use SimpleSoftwareIO\QrCode\Facades\QrCode;

class GuestController extends Controller
{
    protected $guestSearch;
    protected $crossSellEngine;

    public function __construct(GuestSearch $guestSearch, CrossSellEngine $crossSellEngine)
    {
        $this->guestSearch = $guestSearch;
        $this->crossSellEngine = $crossSellEngine;
    }

    public function search(Request $request)
    {
        $query = $request->get('q');
        if (!$query) {
            return response()->json([]);
        }

        $guests = $this->guestSearch->search($query);
        return response()->json($guests);
    }

    public function show($id)
    {
        $guest = Guest::with(['tier', 'visits.venue', 'tags', 'notes.staff'])->findOrFail($id);

        return response()->json($guest);
    }

    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'name' => 'required|string|max:255',
            'phone' => 'required|string|max:20',
            'venue_id' => 'required|exists:venues,id',
        ]);

        if ($validator->fails()) {
            return response()->json($validator->errors(), 422);
        }

        $guest = Guest::create([
            'name' => $request->name,
            'phone' => $request->phone,
            'email' => $request->email,
            'nationality' => $request->nationality,
            'language' => $request->language,
            'birthday' => $request->birthday,
            'marketing_consent' => $request->marketing_consent ?? false,
        ]);

        $guest->generateLoyaltyId();

        // Create initial visit
        GuestVisit::create([
            'guest_id' => $guest->id,
            'venue_id' => $request->venue_id,
            'visit_date' => now(),
            'visit_type' => 'registration',
        ]);

        return response()->json($guest, 201);
    }

    public function checkin(Request $request, $id)
    {
        $validator = Validator::make($request->all(), [
            'venue_id' => 'required|exists:venues,id',
            'spend_amount' => 'numeric|min:0',
            'visit_type' => 'required|in:stay,dining,bar,beach,pool,watersports',
            'room_number' => 'nullable|string',
            'notes' => 'nullable|string',
        ]);

        if ($validator->fails()) {
            return response()->json($validator->errors(), 422);
        }

        $visit = GuestVisit::create([
            'guest_id' => $id,
            'venue_id' => $request->venue_id,
            'visit_date' => now(),
            'spend_amount' => $request->spend_amount ?? 0,
            'visit_type' => $request->visit_type,
            'room_number' => $request->room_number,
            'notes' => $request->notes,
        ]);

        // Update lifetime spend
        $guest = Guest::find($id);
        $guest->lifetime_spend = $guest->visits()->sum('spend_amount');
        $guest->save();

        return response()->json($visit, 201);
    }

    public function getCrossSellSuggestions($id)
    {
        $suggestions = $this->crossSellEngine->getSuggestions($id);
        return response()->json($suggestions);
    }

    public function addTags(Request $request, $id)
    {
        $validator = Validator::make($request->all(), [
            'tags' => 'required|array',
            'tags.*' => 'string',
        ]);

        if ($validator->fails()) {
            return response()->json($validator->errors(), 422);
        }

        foreach ($request->tags as $tagName) {
            GuestTag::firstOrCreate([
                'guest_id' => $id,
                'tag_name' => $tagName,
            ]);
        }

        return response()->json(['message' => 'Tags added successfully']);
    }

    public function addNote(Request $request, $id)
    {
        $validator = Validator::make($request->all(), [
            'note_text' => 'required|string',
        ]);

        if ($validator->fails()) {
            return response()->json($validator->errors(), 422);
    }

        $note = GuestNote::create([
            'guest_id' => $id,
            'note_text' => $request->note_text,
            'staff_id' => auth()->id(),
        ]);

        return response()->json($note, 201);
    }

    public function generateQrCode($id)
    {
        $guest = Guest::findOrFail($id);
        $qrCode = QrCode::size(200)->generate($guest->loyalty_id);

        return response($qrCode)->header('Content-Type', 'image/svg+xml');
    }
}