<?php

namespace Tests\Unit;

use App\Http\Requests\UnitRequest;
use App\Http\Resources\UnitResource;
use App\Models\StudentContract;
use App\Models\Unit;
use App\Services\StudentContractService;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator as ValidatorFacade;
use Tests\TestCase;

class StudentContractProtocolTest extends TestCase
{
    public function test_it_generates_first_protocol_as_000001_when_no_contracts_exist(): void
    {
        $service = new class extends StudentContractService {
            public function getMaxProtocolNumber(): int
            {
                return 0;
            }
        };

        $this->assertSame('000001', $service->generateNextProtocol());
    }

    public function test_it_generates_sequential_protocol_based_on_max_existing_number(): void
    {
        $service = new class extends StudentContractService {
            public int $max = 0;

            public function getMaxProtocolNumber(): int
            {
                return $this->max;
            }
        };

        $service->max = 1;
        $this->assertSame('000002', $service->generateNextProtocol());

        $service->max = 9;
        $this->assertSame('000010', $service->generateNextProtocol());

        $service->max = 99;
        $this->assertSame('000100', $service->generateNextProtocol());

        $service->max = 999;
        $this->assertSame('001000', $service->generateNextProtocol());

        $service->max = 999999;
        $this->assertSame('1000000', $service->generateNextProtocol());
    }

    public function test_it_respects_global_sequence_across_multiple_units(): void
    {
        // Simulating contracts across multiple units:
        // Unit 1 created contract 000001, Unit 2 created contract 000002, Unit 1 created contract 000003
        $existingContracts = collect([
            (object) ['unit_id' => 1, 'protocol' => '000001'],
            (object) ['unit_id' => 2, 'protocol' => '000002'],
            (object) ['unit_id' => 1, 'protocol' => '000003'],
        ]);

        $service = new class($existingContracts) extends StudentContractService {
            public function __construct(private $contracts) {}

            public function getMaxProtocolNumber(): int
            {
                return $this->contracts
                    ->filter(fn ($c) => ctype_digit((string) $c->protocol))
                    ->map(fn ($c) => (int) $c->protocol)
                    ->max() ?? 0;
            }
        };

        // Next protocol for ANY unit should be 000004
        $this->assertSame('000004', $service->generateNextProtocol());
    }

    public function test_it_ignores_non_numeric_manual_protocols_when_calculating_next_sequence(): void
    {
        $existingContracts = collect([
            (object) ['unit_id' => 1, 'protocol' => '000005'],
            (object) ['unit_id' => 2, 'protocol' => 'CUSTOM-ABC-123'],
            (object) ['unit_id' => 1, 'protocol' => 'CONTRATO-2026'],
        ]);

        $service = new class($existingContracts) extends StudentContractService {
            public function __construct(private $contracts) {}

            public function getMaxProtocolNumber(): int
            {
                return $this->contracts
                    ->filter(fn ($c) => ctype_digit((string) $c->protocol))
                    ->map(fn ($c) => (int) $c->protocol)
                    ->max() ?? 0;
            }
        };

        // Highest numeric is 5, so next sequence is 000006
        $this->assertSame('000006', $service->generateNextProtocol());
    }

    public function test_it_recalculates_protocol_in_automatic_mode_when_creating_contract(): void
    {
        $unit = new Unit;
        $unit->id = 10;
        $unit->automatic_protocol = true;

        $service = new class($unit) extends StudentContractService {
            public array $capturedData = [];

            public function __construct(private Unit $mockUnit) {}

            protected function findUnit(int $unitId): ?Unit
            {
                return $this->mockUnit;
            }

            public function generateNextProtocol(): string
            {
                return '000007';
            }

            public function create(array $data): StudentContract
            {
                if (! empty($data['due_day'])) {
                    $data['recurring_day'] = (int) $data['due_day'];
                }
                unset($data['due_day']);

                $unitId = $data['unit_id'] ?? null;
                $isAutomatic = true;

                if ($unitId) {
                    $unit = $this->findUnit($unitId);
                    if ($unit && $unit->automatic_protocol === false) {
                        $isAutomatic = false;
                    }
                }

                if ($isAutomatic) {
                    $data['protocol'] = $this->generateNextProtocol();
                }

                $this->capturedData = $data;

                $contract = new StudentContract;
                $contract->setRawAttributes($data);

                return $contract;
            }
        };

        // Client sent old/stale protocol '000001'
        $contract = $service->create([
            'unit_id' => 10,
            'protocol' => '000001',
            'status' => 'active',
        ]);

        // Service recalculates to '000007'
        $this->assertSame('000007', $contract->protocol);
        $this->assertSame('000007', $service->capturedData['protocol']);
    }

    public function test_it_preserves_custom_protocol_when_unit_automatic_protocol_is_disabled(): void
    {
        $unit = new Unit;
        $unit->id = 20;
        $unit->automatic_protocol = false;

        $service = new class($unit) extends StudentContractService {
            public array $capturedData = [];

            public function __construct(private Unit $mockUnit) {}

            protected function findUnit(int $unitId): ?Unit
            {
                return $this->mockUnit;
            }

            public function generateNextProtocol(): string
            {
                return '000099';
            }

            public function create(array $data): StudentContract
            {
                if (! empty($data['due_day'])) {
                    $data['recurring_day'] = (int) $data['due_day'];
                }
                unset($data['due_day']);

                $unitId = $data['unit_id'] ?? null;
                $isAutomatic = true;

                if ($unitId) {
                    $unit = $this->findUnit($unitId);
                    if ($unit && $unit->automatic_protocol === false) {
                        $isAutomatic = false;
                    }
                }

                if ($isAutomatic) {
                    $data['protocol'] = $this->generateNextProtocol();
                }

                $this->capturedData = $data;

                $contract = new StudentContract;
                $contract->setRawAttributes($data);

                return $contract;
            }
        };

        // Franchisee with manual mode enters custom protocol
        $contract = $service->create([
            'unit_id' => 20,
            'protocol' => 'MANUAL-2026-001',
            'status' => 'active',
        ]);

        $this->assertSame('MANUAL-2026-001', $contract->protocol);
        $this->assertSame('MANUAL-2026-001', $service->capturedData['protocol']);
    }

    public function test_unit_model_casts_automatic_protocol_to_boolean(): void
    {
        $unit = new Unit;
        $unit->automatic_protocol = 1;
        $this->assertTrue($unit->automatic_protocol);

        $unit->automatic_protocol = 0;
        $this->assertFalse($unit->automatic_protocol);

        $unit->automatic_protocol = 'true';
        $this->assertTrue($unit->automatic_protocol);
    }

    public function test_unit_resource_includes_automatic_protocol(): void
    {
        $unit = new Unit;
        $unit->id = 1;
        $unit->name = 'Unidade Teste';
        $unit->social_reason = 'Unidade Teste LTDA';
        $unit->automatic_protocol = false;
        $unit->created_at = now();
        $unit->updated_at = now();

        $resource = new UnitResource($unit);
        $array = $resource->toArray(Request::create('/'));

        $this->assertArrayHasKey('automatic_protocol', $array);
        $this->assertFalse($array['automatic_protocol']);

        $unit->automatic_protocol = true;
        $resourceTrue = new UnitResource($unit);
        $arrayTrue = $resourceTrue->toArray(Request::create('/'));

        $this->assertTrue($arrayTrue['automatic_protocol']);
    }

    public function test_unit_request_validates_automatic_protocol_as_boolean(): void
    {
        $rules = ['automatic_protocol' => (new UnitRequest)->rules()['automatic_protocol']];

        $validValidator = ValidatorFacade::make(['automatic_protocol' => true], $rules);
        $this->assertFalse($validValidator->errors()->has('automatic_protocol'));

        $validFalseValidator = ValidatorFacade::make(['automatic_protocol' => false], $rules);
        $this->assertFalse($validFalseValidator->errors()->has('automatic_protocol'));

        $invalidValidator = ValidatorFacade::make(['automatic_protocol' => 'not-a-boolean'], $rules);
        $this->assertTrue($invalidValidator->errors()->has('automatic_protocol'));
    }
}