<?php

namespace App\Services;

use App\Enums\ApprovalStatusEnum;
use App\Enums\UserTypeEnum;
use App\Models\Address;
use App\Models\Client;
use App\Models\PersonalAccessToken;
use App\Models\Provider;
use App\Models\User;
use Carbon\Carbon;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Str;

class AuthService
{
    public function __construct(
        private readonly EmailService $emailService,
    ) {}

    public function login(string $email, string $password): ?array
    {
        $user = User::where('email', $email)->first();

        if (! $user || ! in_array($user->type, [UserTypeEnum::ADMIN, UserTypeEnum::USER])) {
            return null;
        }

        if (! Auth::attempt(['email' => $email, 'password' => $password])) {
            return null;
        }

        // $user = User::where('email', $email)->first();
        $deviceId = Str::uuid()->toString();

        $accessToken = $user->createAccessToken($deviceId);
        $refreshToken = $user->createRefreshToken($deviceId);

        return [
            'payload' => [
                'access_token' => $accessToken,
                'user'         => $user,
            ],
            'refreshToken' => $refreshToken,
        ];
    }

    public function refresh(string $refreshToken): ?array
    {
        if (! $refreshToken) {
            return null;
        }

        $tokenModel = PersonalAccessToken::findToken($refreshToken);

        if (
            ! $tokenModel ||
            ! in_array('refresh', $tokenModel->abilities) ||
            $tokenModel->expires_at < now()
        ) {
            return null;
        }

        $user = $tokenModel->tokenable;
        if (! $user) {
            return null;
        }

        $deviceId = Str::afterLast($tokenModel->name, '_');

        $tokens = $this->refreshTokenTransaction($tokenModel, $user, $deviceId);

        return [
            'payload' => [
                'access_token' => $tokens['access_token'],
                'user'         => $user,
            ],
            'refreshToken' => $tokens['refresh_token'],
        ];
    }

    public function logout(): void
    {
        $user = Auth::user();
        if (! $user) {
            return;
        }

        $tokenName = $user->currentAccessToken()->name;
        $deviceId = Str::afterLast($tokenName, '_');

        $user
            ->tokens()
            ->where('name', 'like', "%_{$deviceId}")
            ->delete();
    }

    protected function refreshTokenTransaction(
        PersonalAccessToken $tokenModel,
        User $user,
        string $deviceId,
    ): array {
        return DB::transaction(function () use (
            $tokenModel,
            $user,
            $deviceId,
        ): array {
            $tokenModel->update(['expires_at' => Carbon::now()]);

            $accessToken = $user->createAccessToken($deviceId);
            $refreshToken = $user->createRefreshToken($deviceId);

            return [
                'access_token'  => $accessToken,
                'refresh_token' => $refreshToken,
            ];
        });
    }

    public function clientSendCode(array $data): bool|array|null
    {
        try {
            DB::beginTransaction();
            $code = str_pad((string) random_int(0, 999999), 6, '0', STR_PAD_LEFT);

            $user = User::where(function ($query) use ($data) {
                $query->when(! empty($data['email']), function ($q) use ($data) {
                    $q->where('email', $data['email']);
                })
                    ->when(! empty($data['phone']), function ($q) use ($data) {
                        $q->where('phone', $data['phone']);
                    });
            })
                ->first();

            $isLogin = false;

            if ($user) {
                if ($user->type->value !== UserTypeEnum::CLIENT->value) {
                    DB::rollBack();

                    return ['error' => 'wrong_user_type'];
                }

                $user->code = $code;

                $user->validated_code = false;

                $user->save();

                $client = Client::where('user_id', $user->id)->first();

                $hasAddress = $client && Address::where('source', 'client')
                    ->where('source_id', $client->id)
                    ->exists();

                $isLogin = $client && $hasAddress;
            } else {
                $user = new User;

                $user->fill($data);

                $user->code = $code;
                $user->name = $data['name'] ?? 'Usuário';
                $user->type = $data['type'] ?? UserTypeEnum::CLIENT->value;

                $user->save();

                Client::create(['user_id' => $user->id]);
            }

            if (! empty($data['email'])) {
                $this->emailService->sendVerificationCode(
                    email: $data['email'],
                    code: $code,
                    recipientName: $data['name'] ?? '',
                );
            } elseif (! empty($data['phone'])) {
                Log::info('SMS: envio de código por telefone ainda não implementado.', [
                    'phone' => $data['phone'],
                ]);
            }

            DB::commit();

            return $isLogin;
        } catch (\Exception $e) {
            DB::rollBack();
            Log::error('Erro ao enviar código de verificação.', [
                'error' => $e->getMessage(),
                'data'  => $data,
            ]);

            return false;
        }
    }

    public function providerSendCode(array $data): bool|array|null
    {
        try {
            DB::beginTransaction();
            $code = str_pad((string) random_int(0, 999999), 6, '0', STR_PAD_LEFT);

            $user = User::where(function ($query) use ($data) {
                $query->when(! empty($data['email']), function ($q) use ($data) {
                    $q->where('email', $data['email']);
                })
                    ->when(! empty($data['phone']), function ($q) use ($data) {
                        $q->where('phone', $data['phone']);
                    });
            })
                ->first();
            $isLogin = false;
            if ($user) {
                if ($user->type->value !== UserTypeEnum::PROVIDER->value) {
                    DB::rollBack();

                    return ['error' => 'wrong_user_type'];
                }
                $provider = Provider::where('user_id', $user->id)->first();
                if ($provider && $provider->approval_status->value !== ApprovalStatusEnum::ACCEPTED->value) {
                    DB::rollBack();

                    return ['error' => 'provider_not_accepted'];
                }

                $user->code = $code;
                $user->validated_code = false;
                $user->save();
                $isLogin = true;
            } else {
                $user = new User;
                $user->fill($data);
                $user->code = $code;
                $user->name = $data['name'] ?? 'Usuário';
                $user->type = $data['type'] ?? UserTypeEnum::PROVIDER->value;
                $user->save();
            }

            if (! empty($data['email'])) {
                $this->emailService->sendVerificationCode(
                    email: $data['email'],
                    code: $code,
                    recipientName: $data['name'] ?? '',
                );
            } elseif (! empty($data['phone'])) {
                Log::info('SMS: envio de código por telefone ainda não implementado.', [
                    'phone' => $data['phone'],
                ]);
            }

            DB::commit();

            return $isLogin;
        } catch (\Exception $e) {
            DB::rollBack();
            Log::error('Erro ao enviar código de verificação.', [
                'error' => $e->getMessage(),
                'data'  => $data,
            ]);

            return false;
        }
    }

    public function validateCodeClient(array $data, bool $isLogin): bool|array
    {
        $email = $data['email'] ?? null;
        $phone = $data['phone'] ?? null;
        $code = $data['code'] ?? '';

        $user = User::where(function ($query) use ($email, $phone) {
            $query->when($email, fn ($q) => $q->where('email', $email))
                ->when($phone, fn ($q) => $q->where('phone', $phone));
        })
            ->where('code', $code)
            ->first();

        if (! $user) {
            return false;
        }

        if ($isLogin) {
            return $this->loginWithEmail($user->email, $code);
        }

        return true;
    }

    public function validateCodeProvider(array $data, bool $isLogin): bool|array
    {
        $email = $data['email'] ?? null;
        $phone = $data['phone'] ?? null;
        $code = $data['code'] ?? '';

        $user = User::where(function ($query) use ($email, $phone) {
            $query->when($email, fn ($q) => $q->where('email', $email))
                ->when($phone, fn ($q) => $q->where('phone', $phone));
        })
            ->where('code', $code)
            ->first();

        if (! $user) {
            return false;
        }

        if ($isLogin) {
            $user->load('provider');
            $provider = $user->provider ?? null;

            if ($provider && $provider->approval_status === ApprovalStatusEnum::PENDING->value) {
                return ['error' => 'provider_pending'];
            }

            if ($provider && $provider->approval_status === ApprovalStatusEnum::REJECTED->value) {
                return ['error' => 'provider_rejected'];
            }

            return $this->loginWithEmail($user->email, $code);
        }

        return true;
    }

    public function validateCode(array $data, bool $isLogin): bool|array
    {
        $email = $data['email'] ?? null;
        $phone = $data['phone'] ?? null;
        $code = $data['code'] ?? '';

        $user = User::where(function ($query) use ($email, $phone) {
            $query->when($email, function ($q) use ($email) {
                $q->where('email', $email);
            })
                ->when($phone, function ($q) use ($phone) {
                    $q->where('phone', $phone);
                });
        })
            ->where('code', $code)
            ->first();

        if (! $user) {
            return false;
        }

        if ($isLogin) {
            $resultLogin = $this->loginWithEmail($user->email, $code);

            return $resultLogin;
        }

        return true;
    }

    public function loginWithEmail(string $email, string $code): ?array
    {
        $user = User::where('email', $email)
            ->where('code', $code)
            ->first();

        if (! $user) {
            return null;
        }

        $deviceId = Str::uuid()->toString();

        $accessToken = $user->createAccessTokenApp($deviceId);
        $refreshToken = $user->createRefreshTokenApp($deviceId);

        $user->validated_code = true;

        $user->code = null;

        $user->save();

        return [
            'payload' => [
                'access_token' => $accessToken,
                'user'         => $user,
            ],
            'refreshToken' => $refreshToken,
        ];
    }
}