<?php

namespace App\Http\Controllers;

use App\Http\Requests\EmailVerificationNotificationRequest;
use App\Http\Requests\LoginRequest;
use App\Http\Requests\RegisterRequest;
use App\Http\Requests\UpdateUserRequest;
use App\Http\Resources\UserResource;
use App\Models\User;
use Illuminate\Auth\Events\Verified;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;
use Illuminate\View\View;

class AuthController extends Controller
{
    public function register(RegisterRequest $request): JsonResponse
    {
        $data = $request->validated();

        $avatarPath = null;
        if ($request->hasFile('avatar')) {
            $avatarPath = $request->file('avatar')->store('avatars', 'public');
        }

        $userAttributes = $this->userAttributesFromRequestData($data);
        $userAttributes['email'] = strtolower($data['email']);
        $userAttributes['password'] = Hash::make($data['password']);
        $userAttributes['avatar_url'] = $avatarPath;

        $user = User::create($userAttributes);

        $user->sendEmailVerificationNotification();

        $token = $user->createToken('api', ['user'])->plainTextToken;

        return response()->json([
            'message' => __('api.auth.registered_unverified'),
            'user' => new UserResource($user),
        ], 201)->cookie('token', $token, 60 * 24 * 30);
    }

    public function login(LoginRequest $request): JsonResponse
    {
        $data = $request->validated();

        $user = User::where('email', strtolower($data['email']))->first();

        if (! $user || ! Hash::check($data['password'], $user->password)) {
            return response()->json([
                'message' => __('api.auth.invalid_credentials'),
            ], 401);
        }

        if (! $user->hasVerifiedEmail()) {
            return response()->json([
                'message' => __('api.auth.email_not_verified'),
            ], 403);
        }

        $token = $user->createToken('api')->plainTextToken;

        return response()->json([
            'user' => new UserResource($user),
        ])->cookie('token', $token, 60 * 24 * 30);
    }

    public function verifyEmail(Request $request, string $id, string $hash): JsonResponse|View
    {
        $user = User::findOrFail($id);

        if (! hash_equals($hash, sha1($user->getEmailForVerification()))) {
            if ($request->expectsJson()) {
                return response()->json([
                    'message' => __('api.auth.invalid_verification_link'),
                ], 403);
            }

            abort(403, __('api.auth.invalid_verification_link'));
        }

        $alreadyVerified = $user->hasVerifiedEmail();

        if (! $alreadyVerified) {
            $user->markEmailAsVerified();

            event(new Verified($user));
        }

        if ($request->expectsJson()) {
            return response()->json([
                'message' => $alreadyVerified
                    ? __('api.auth.already_verified')
                    : __('api.auth.verified'),
                'user' => new UserResource($user->fresh()),
            ]);
        }

        return view('auth.email-verified', [
            'alreadyVerified' => $alreadyVerified,
            'appName' => config('app.name'),
        ]);
    }

    public function sendVerificationEmail(EmailVerificationNotificationRequest $request): JsonResponse
    {
        $email = strtolower($request->validated('email'));
        $user = User::where('email', $email)->first();

        if ($user && ! $user->hasVerifiedEmail()) {
            $user->sendEmailVerificationNotification();
        }

        return response()->json([
            'message' => __('api.auth.verification_sent_if_unverified'),
        ]);
    }

    public function logout(): JsonResponse
    {
        $request = request();
        $request->user()->currentAccessToken()->delete();

        return response()->json([
            'message' => __('api.auth.logout'),
        ])->withoutCookie('token');
    }

    public function me(): JsonResource|JsonResponse
    {
        $user = auth()->user();

        if (! $user) {
            return response()->json(['message' => __('api.auth.unauthenticated')], 401);
        }

        return new UserResource($user);
    }

    public function update(UpdateUserRequest $request): JsonResource
    {
        $user = $request->user();
        $data = $request->validated();
        $nutritionGoals = $data['nutritionGoals'] ?? null;

        if ($request->hasFile('avatar')) {
            if ($user->avatar_url) {
                Storage::disk('public')->delete($user->avatar_url);
            }

            $path = $request->file('avatar')->store('avatars', 'public');
            $data['avatar_url'] = $path;
        }

        $userAttributes = $this->userAttributesFromRequestData($data);

        if (is_array($nutritionGoals)) {
            $userAttributes['daily_calorie_goal'] = $nutritionGoals['calories'];
            $userAttributes['daily_protein_goal'] = $nutritionGoals['proteins'];
            $userAttributes['daily_carbs_goal'] = $nutritionGoals['carbs'];
            $userAttributes['daily_fats_goal'] = $nutritionGoals['fats'];
        }

        if (! empty($userAttributes)) {
            $user->update($userAttributes);
        }

        return new UserResource($user->fresh());
    }

    public function destroy(Request $request): JsonResponse
    {
        $user = $request->user();
        $storagePaths = collect([$user->avatar_url])
            ->merge($user->mealPosts()->withTrashed()->pluck('image_url'))
            ->filter(fn (?string $path): bool => $this->isPublicStoragePath($path))
            ->values()
            ->all();

        DB::transaction(function () use ($user): void {
            $user->tokens()->delete();
            $user->notifications()->delete();

            DB::table('sessions')
                ->where('user_id', $user->getKey())
                ->delete();

            DB::table('password_reset_tokens')
                ->where('email', $user->email)
                ->delete();

            $user->delete();
        });

        if (! empty($storagePaths)) {
            Storage::disk('public')->delete($storagePaths);
        }

        return response()->json([
            'message' => __('api.auth.deleted'),
        ])->withoutCookie('token');
    }

    private function isPublicStoragePath(?string $path): bool
    {
        return filled($path) && ! Str::startsWith($path, ['http://', 'https://']);
    }

    /**
     * @param  array<string, mixed>  $data
     * @return array<string, mixed>
     */
    private function userAttributesFromRequestData(array $data): array
    {
        $attributes = Arr::only($data, [
            'name',
            'avatar_url',
            'height',
            'bio',
            'sex',
            'date_of_birth',
        ]);

        $attributeMap = [
            'physicalActivityLevel' => 'physical_activity_level',
            'weightGoal' => 'weight_goal',
            'pacePreference' => 'pace_preference',
            'dateOfBirth' => 'date_of_birth',
        ];

        foreach ($attributeMap as $requestKey => $attribute) {
            if (array_key_exists($requestKey, $data)) {
                $attributes[$attribute] = $data[$requestKey];
            }
        }

        return $attributes;
    }
}