<?php

declare(strict_types=1);

namespace BattleForge\Tests\Integration;

use BattleForge\Http\Handlers\GetBundledScenario;
use BattleForge\Http\Request;
use PHPUnit\Framework\TestCase;

final class GetBundledScenarioTest extends TestCase
{
    private string $tmpDir;

    protected function setUp(): void
    {
        $this->tmpDir = sys_get_temp_dir() . '/bf-bundled-one-' . bin2hex(random_bytes(4));
        mkdir($this->tmpDir, 0700, true);
        file_put_contents(
            $this->tmpDir . '/manifest.json',
            json_encode(['valid' => ['name' => 'Valid', 'summary' => 'OK']], JSON_THROW_ON_ERROR),
        );
        $this->writeValidFixture();
    }

    protected function tearDown(): void
    {
        if (is_dir($this->tmpDir)) {
            foreach (glob($this->tmpDir . '/*') ?: [] as $file) {
                unlink($file);
            }
            rmdir($this->tmpDir);
        }
    }

    public function testReturnsTheScenarioJsonForAKnownId(): void
    {
        $handler = new GetBundledScenario($this->tmpDir);
        $response = $handler->handle(
            new Request([], [], [], [], [], '', 'GET', '/scenarios/bundled/valid', null, ''),
            ['id' => 'valid'],
        );

        self::assertSame(200, $response->status);
        $body = json_decode($response->body, true);
        self::assertSame('valid', $body['id'] ?? null);
        self::assertSame('Valid', $body['name'] ?? null);
        self::assertSame(8, $body['battlefield']['width'] ?? null);
    }

    public function testReturns404ForAnUnknownId(): void
    {
        $handler = new GetBundledScenario($this->tmpDir);
        $response = $handler->handle(
            new Request([], [], [], [], [], '', 'GET', '/scenarios/bundled/unknown', null, ''),
            ['id' => 'unknown'],
        );

        self::assertSame(404, $response->status);
    }

    public function testReturns404ForAnIdThatFailsTheRegex(): void
    {
        $handler = new GetBundledScenario($this->tmpDir);
        $response = $handler->handle(
            new Request([], [], [], [], [], '', 'GET', '/scenarios/bundled/..', null, ''),
            ['id' => '..'],
        );

        self::assertSame(404, $response->status);
    }

    public function testReturns500WhenTheFixtureFailsValidation(): void
    {
        $bad = [
            'id' => 'broken',
            'name' => 'Broken',
            'battlefield' => ['width' => 8, 'height' => 8, 'terrain' => []],
            'units' => [],
            'deploymentZones' => [],
            'objectives' => [],
            'victoryCondition' => 'eliminate_all',
            'holdRoundsRequired' => 1,
        ];
        file_put_contents($this->tmpDir . '/broken.json', json_encode($bad, JSON_THROW_ON_ERROR));
        file_put_contents(
            $this->tmpDir . '/manifest.json',
            json_encode([
                'valid' => ['name' => 'Valid', 'summary' => 'OK'],
                'broken' => ['name' => 'Broken', 'summary' => 'Bad'],
            ], JSON_THROW_ON_ERROR),
        );

        $handler = new GetBundledScenario($this->tmpDir);
        $response = $handler->handle(
            new Request([], [], [], [], [], '', 'GET', '/scenarios/bundled/broken', null, ''),
            ['id' => 'broken'],
        );

        self::assertSame(500, $response->status);
        $body = json_decode($response->body, true);
        self::assertSame('fixture invalid', $body['error'] ?? null);
        self::assertIsArray($body['details'] ?? null);
        self::assertNotEmpty($body['details']);
    }

    private function writeValidFixture(): void
    {
        $fixture = [
            'id' => 'valid',
            'name' => 'Valid',
            'battlefield' => ['width' => 8, 'height' => 8, 'terrain' => []],
            'units' => [
                $this->unit('a1', 'alpha', 0, 0),
                $this->unit('a2', 'alpha', 1, 0),
                $this->unit('a3', 'alpha', 2, 0),
                $this->unit('b1', 'bravo', 7, 7),
                $this->unit('b2', 'bravo', 6, 7),
                $this->unit('b3', 'bravo', 5, 7),
            ],
            'deploymentZones' => [
                'alpha' => $this->deploymentZone('alpha', [[0, 0], [1, 0], [2, 0]]),
                'bravo' => $this->deploymentZone('bravo', [[7, 7], [6, 7], [5, 7]]),
            ],
            'objectives' => [],
            'victoryCondition' => 'eliminate_all',
            'holdRoundsRequired' => 1,
        ];
        file_put_contents($this->tmpDir . '/valid.json', json_encode($fixture, JSON_THROW_ON_ERROR));
    }

    /** @return array<string, mixed> */
    private function unit(string $id, string $teamId, int $x, int $y): array
    {
        return [
            'id' => $id,
            'teamId' => $teamId,
            'position' => ['x' => $x, 'y' => $y],
            'maxHealth' => 10,
            'health' => 10,
            'attack' => 3,
            'defense' => 3,
            'speed' => 2,
            'archetype' => 'defender',
            'abilities' => [],
        ];
    }

    /**
     * @param list<array{0: int, 1: int}> $coords
     * @return array<string, mixed>
     */
    private function deploymentZone(string $teamId, array $coords): array
    {
        $positions = [];
        foreach ($coords as $coord) {
            $positions[] = ['x' => $coord[0], 'y' => $coord[1]];
        }

        return ['teamId' => $teamId, 'positions' => $positions];
    }
}