<?php

declare(strict_types=1);

namespace Cepis\Tests;

use Cepis\CepNotFoundException;
use Cepis\InvalidCepException;
use Cepis\InvalidResponseException;

final class LookupTest extends ServerTestCase
{
    /**
     * The `faixa` the API sends on the 404 of a CEP that does not exist but
     * falls inside a municipality's range. `25845000` is the textbook case: it
     * is the DNE's own start for Areal, it is the number everyone guesses, and
     * it was never issued — which is why `cep_ini` is `25845001`.
     */
    private const AREAL_FAIXA = [
        'localidade' => 'Areal',
        'uf' => 'RJ',
        'estado' => 'Rio de Janeiro',
        'regiao' => 'Sudeste',
        'ibge' => '3300225',
        'cep_ini' => '25845001',
        'cep_fim' => '25849899',
        'ceps' => 118,
    ];

    public function testSuccessfulLookup(): void
    {
        $this->server->respond('/01001000', [self::json(self::SE_ADDRESS)]);
        $address = $this->client->lookup('01001-000');

        self::assertSame('Praça da Sé', $address->logradouro);
        self::assertSame('São Paulo', $address->localidade);
        self::assertSame('SP', $address->uf);
        self::assertSame('01001000', $address->cep);
        self::assertSame('01001-000', $address->formattedCep());
        self::assertNull($address->geo);
    }

    public function testReadsTheCoordinateWhenPresent(): void
    {
        $body = self::SE_ADDRESS + [];
        $body['geo'] = ['lat' => -23.567202, 'lon' => -46.649659, 'raio_m' => 1084, 'precisao' => 'logradouro'];
        $this->server->respond('/01310100', [self::json($body)]);
        $address = $this->client->lookup('01310100');

        self::assertNotNull($address->geo);
        self::assertEqualsWithDelta(-23.567202, $address->geo->lat, 1e-9);
        self::assertEqualsWithDelta(-46.649659, $address->geo->lon, 1e-9);
        self::assertSame(1084, $address->geo->raio_m);
        self::assertSame('logradouro', $address->geo->precisao);
        self::assertTrue($address->geo->isPrecise());
    }

    public function testMunicipalityCoordinateIsNotPrecise(): void
    {
        $body = self::SE_ADDRESS;
        $body['geo'] = ['lat' => -23.5, 'lon' => -46.6, 'raio_m' => 22000, 'precisao' => 'localidade'];
        $this->server->respond('/01001000', [self::json($body)]);

        $geo = $this->client->lookup('01001000')->geo;
        self::assertNotNull($geo);
        self::assertFalse($geo->isPrecise());
    }

    public function testMalformedGeoDoesNotLoseTheAddress(): void
    {
        $body = self::SE_ADDRESS;
        $body['geo'] = ['lat' => 'not a number'];
        $this->server->respond('/01001000', [self::json($body)]);
        $address = $this->client->lookup('01001000');

        self::assertNull($address->geo);
        self::assertSame('São Paulo', $address->localidade);
    }

    public function testNewApiFieldDoesNotBreak(): void
    {
        $body = self::SE_ADDRESS;
        $body['campo_do_futuro'] = 'value';
        $this->server->respond('/01001000', [self::json($body)]);
        $address = $this->client->lookup('01001000');

        self::assertSame('value', $address->raw['campo_do_futuro']);
        self::assertSame('value', $address->field('campo_do_futuro'));
        self::assertNull($address->field('nao_existe'));
        self::assertSame('São Paulo', $address->localidade);
    }

    public function testMissingFieldsBecomeEmptyStringsNotNull(): void
    {
        $this->server->respond('/01001000', [self::json(['cep' => '01001000'])]);
        $address = $this->client->lookup('01001000');

        self::assertSame('', $address->logradouro);
        self::assertSame('', $address->uf);
    }

    public function testNotFound(): void
    {
        $this->server->respond('/99999999', [self::json(
            ['erro' => 'cep_nao_encontrado', 'mensagem' => 'CEP não existe na base do DNE'],
            404,
        )]);

        try {
            $this->client->lookup('99999999');
            self::fail('expected CepNotFoundException');
        } catch (CepNotFoundException $exception) {
            self::assertStringContainsString('99999999', $exception->getMessage());
            self::assertNull($exception->faixa);
        }
    }

    public function testNotFoundCarriesTheFaixaWhenTheApiSendsOne(): void
    {
        $this->server->respond('/25845000', [self::json(
            [
                'erro' => 'cep_nao_encontrado',
                'mensagem' => 'CEP não existe na base do DNE',
                'faixa' => self::AREAL_FAIXA,
            ],
            404,
        )]);

        try {
            $this->client->lookup('25845-000');
            self::fail('expected CepNotFoundException');
        } catch (CepNotFoundException $exception) {
            $faixa = $exception->faixa;
            self::assertNotNull($faixa);
            self::assertSame('Areal', $faixa->localidade);
            self::assertSame('RJ', $faixa->uf);
            self::assertSame('Rio de Janeiro', $faixa->estado);
            self::assertSame('Sudeste', $faixa->regiao);
            self::assertSame('3300225', $faixa->ibge);
            self::assertSame(118, $faixa->ceps);
            self::assertSame('Areal/RJ', $faixa->label());

            // The bounds are the CEPs that exist, not the ones the Correios
            // publish: the CEP that just failed is the DNE's own start for
            // Areal and is below cep_ini for exactly that reason.
            self::assertSame('25845001', $faixa->cep_ini);
            self::assertSame('25849899', $faixa->cep_fim);
            self::assertTrue($faixa->cep_ini > '25845000');

            // 118 CEPs over ~4,900 numbers: the pair is a range, never a list.
            self::assertLessThan(
                (int) $faixa->cep_fim - (int) $faixa->cep_ini,
                $faixa->ceps,
            );

            self::assertStringContainsString('Areal/RJ', $exception->getMessage());
            self::assertStringContainsString('25845000', $exception->getMessage());
        }
    }

    public function testFaixaIsStillANotFoundAndNotAnAddress(): void
    {
        $this->server->respond('/25845000', [self::json(
            ['erro' => 'cep_nao_encontrado', 'faixa' => self::AREAL_FAIXA],
            404,
        )]);

        $this->expectException(CepNotFoundException::class);
        $this->client->lookup('25845000');
    }

    /**
     * A `faixa` this client cannot read costs nothing: the answer is the same
     * not-found it would have been without one. Anything else would trade a
     * useful exception for an unhelpful parse failure.
     */
    public function testUnreadableFaixaStillGivesACleanNotFound(): void
    {
        $shapes = [
            'null' => null,
            'empty object' => [],
            'a string' => 'Areal',
            'a number' => 42,
            'a list' => ['Areal', 'RJ'],
            'no municipality' => ['uf' => 'RJ', 'cep_ini' => '25845001'],
            'empty municipality' => ['localidade' => '', 'uf' => 'RJ'],
            'nested junk' => ['localidade' => ['Areal'], 'ceps' => 'many'],
        ];

        $specs = [];
        foreach ($shapes as $faixa) {
            $specs[] = self::json(['erro' => 'cep_nao_encontrado', 'faixa' => $faixa], 404);
        }
        $this->server->respond('/25845000', $specs);

        foreach (array_keys($shapes) as $name) {
            try {
                $this->client->lookup('25845000');
                self::fail('expected CepNotFoundException for ' . $name);
            } catch (CepNotFoundException $exception) {
                self::assertNull($exception->faixa, $name);
                self::assertStringContainsString('25845000', $exception->getMessage(), $name);
            }
        }
    }

    public function testPartialFaixaKeepsWhatItCanRead(): void
    {
        $this->server->respond('/25845000', [self::json(
            ['erro' => 'cep_nao_encontrado', 'faixa' => ['localidade' => 'Areal', 'ceps' => 'many']],
            404,
        )]);

        try {
            $this->client->lookup('25845000');
            self::fail('expected CepNotFoundException');
        } catch (CepNotFoundException $exception) {
            self::assertNotNull($exception->faixa);
            self::assertSame('Areal', $exception->faixa->localidade);
            self::assertSame('', $exception->faixa->uf);
            self::assertSame('', $exception->faixa->cep_ini);
            self::assertSame(0, $exception->faixa->ceps);
            self::assertSame('Areal', $exception->faixa->label());
        }
    }

    public function testUnreadableNotFoundBodyStillGivesACleanNotFound(): void
    {
        $this->server->respond('/25845000', [self::raw(404, '<html>proxy says no</html>')]);

        try {
            $this->client->lookup('25845000');
            self::fail('expected CepNotFoundException');
        } catch (CepNotFoundException $exception) {
            self::assertNull($exception->faixa);
        }
    }

    public function testNotFoundIsNotRetried(): void
    {
        $this->server->respond('/99999999', [self::json(['erro' => 'cep_nao_encontrado'], 404)]);

        $this->expectException(CepNotFoundException::class);

        try {
            $this->client->lookup('99999999');
        } finally {
            self::assertSame(1, $this->server->countCalls('/99999999'));
        }
    }

    public function testInvalidCepNeverLeavesTheMachine(): void
    {
        try {
            $this->client->lookup('123');
            self::fail('expected InvalidCepException');
        } catch (InvalidCepException) {
            self::assertSame([], $this->server->calls());
        }
    }

    public function testApi400BecomesInvalidCep(): void
    {
        $this->server->respond('/00000000', [self::json(
            ['erro' => 'cep_invalido', 'mensagem' => 'rejected by the API'],
            400,
        )]);

        try {
            $this->client->lookup('00000000');
            self::fail('expected InvalidCepException');
        } catch (InvalidCepException $exception) {
            self::assertSame('rejected by the API', $exception->getMessage());
            self::assertSame(1, $this->server->countCalls('/00000000'));
        }
    }

    public function testResponseThatIsNotJson(): void
    {
        $this->server->respond('/01001000', [self::raw(200, '<html>captive portal</html>')]);

        $this->expectException(InvalidResponseException::class);
        $this->client->lookup('01001000');
    }

    public function testJsonArrayIsNotAnObject(): void
    {
        $this->server->respond('/01001000', [self::raw(200, '[1, 2, 3]')]);

        $this->expectException(InvalidResponseException::class);
        $this->client->lookup('01001000');
    }
}