<?php

declare(strict_types=1);

namespace BattleForge\Tests\Unit\Http;

use BattleForge\Application\TurnToken;
use BattleForge\Domain\Archetype;
use BattleForge\Domain\Battlefield;
use BattleForge\Domain\MatchState;
use BattleForge\Domain\Position;
use BattleForge\Domain\UnitState;
use BattleForge\Http\CsrfToken;
use BattleForge\Http\MatchActionSupport;
use BattleForge\Http\Request;
use PHPUnit\Framework\TestCase;

final class MatchActionSupportTest extends TestCase
{
    private const SECRET = 'support-test-secret';

    public function testItRejectsARequestWithAMissingCsrfToken(): void
    {
        $support = new MatchActionSupport(self::SECRET);
        $request = $this->buildRequest(
            match: $this->validMatchArray(),
            csrf: '',
            turnToken: 'irrelevant',
        );

        $result = $support->verify($request);

        self::assertNotNull($result->response);
        self::assertSame(403, $result->response->status);
        self::assertNull($result->matchIdAndMatch);
    }

    public function testItRejectsARequestWithABadTurnToken(): void
    {
        [$csrf, $cookie] = CsrfToken::issue(self::SECRET);
        $match = $this->validMatch();
        $matchId = '0123456789abcdef';
        $badToken = TurnToken::issue(self::SECRET, $matchId, 'bravo', 1, 0);

        $support = new MatchActionSupport(self::SECRET);
        $request = $this->buildRequest(
            match: $this->validMatchArray(),
            csrf: $csrf,
            turnToken: $badToken,
            cookies: ['__csrf' => $cookie],
        );

        $result = $support->verify($request);

        self::assertNotNull($result->response);
        self::assertSame(409, $result->response->status);
        $body = json_decode($result->response->body, true);
        self::assertSame('turn', $body['error'] ?? null);
    }

    public function testItRejectsAMalformedMatchState(): void
    {
        [$csrf, $cookie] = CsrfToken::issue(self::SECRET);
        $support = new MatchActionSupport(self::SECRET);
        $request = $this->buildRequest(
            match: ['this' => 'is not a match'],
            csrf: $csrf,
            turnToken: 'whatever',
            cookies: ['__csrf' => $cookie],
        );

        $result = $support->verify($request);

        self::assertNotNull($result->response);
        self::assertSame(400, $result->response->status);
    }

    public function testItReturnsTheValidatedPairForAValidRequest(): void
    {
        $match = $this->validMatch();
        $matchArray = $this->validMatchArray();
        $matchId = '0123456789abcdef';
        $token = TurnToken::issue(
            self::SECRET,
            $matchId,
            $match->activeTeamId,
            $match->round,
            count($match->actionLog)
        );
        [$csrf, $cookie] = CsrfToken::issue(self::SECRET);

        $support = new MatchActionSupport(self::SECRET);
        $body = json_encode(['matchId' => $matchId, 'match' => $matchArray], JSON_THROW_ON_ERROR);
        $request = new Request(
            [],
            [],
            [],
            ['__csrf' => $cookie],
            [
                'HTTP_X_CSRF_TOKEN' => $csrf,
                'HTTP_X_TURN_TOKEN' => $token,
                '__csrf_secret' => self::SECRET,
                'CONTENT_TYPE' => 'application/json',
            ],
            '',
            'POST',
            '/matches/current/move',
            'application/json',
            $body
        );

        $result = $support->verify($request);

        self::assertNull($result->response);
        self::assertNotNull($result->matchIdAndMatch);
        self::assertSame($matchId, $result->matchIdAndMatch['matchId']);
        self::assertInstanceOf(MatchState::class, $result->matchIdAndMatch['match']);
    }

    private function validMatch(): MatchState
    {
        return new MatchState(
            new Battlefield(8, 8),
            [
                $this->makeUnit('alpha-1', 'alpha', 0, 0, Archetype::Defender),
                $this->makeUnit('alpha-2', 'alpha', 1, 0, Archetype::Defender),
                $this->makeUnit('alpha-3', 'alpha', 2, 0, Archetype::Defender),
                $this->makeUnit('bravo-1', 'bravo', 7, 7, Archetype::Striker),
                $this->makeUnit('bravo-2', 'bravo', 6, 7, Archetype::Striker),
                $this->makeUnit('bravo-3', 'bravo', 5, 7, Archetype::Striker),
            ],
            'alpha',
        );
    }

    private function makeUnit(string $id, string $teamId, int $x, int $y, Archetype $archetype): UnitState
    {
        return new UnitState(
            $id,
            $teamId,
            new Position($x, $y),
            10,
            10,
            3,
            3,
            2,
            2,
            false,
            $archetype,
        );
    }

    /** @return array<string, mixed> */
    private function validMatchArray(): array
    {
        return \BattleForge\Application\ScenarioSerializer::matchToArray($this->validMatch());
    }

    /**
     * @param array<string, mixed> $match
     * @param array<string, string> $cookies
     */
    private function buildRequest(array $match, string $csrf, string $turnToken, array $cookies = []): Request
    {
        $body = json_encode(['matchId' => '0123456789abcdef', 'match' => $match], JSON_THROW_ON_ERROR);
        return new Request(
            [],
            [],
            [],
            $cookies,
            [
                'HTTP_X_CSRF_TOKEN' => $csrf,
                'HTTP_X_TURN_TOKEN' => $turnToken,
                '__csrf_secret' => self::SECRET,
                'CONTENT_TYPE' => 'application/json',
            ],
            '',
            'POST',
            '/matches/current/move',
            'application/json',
            $body
        );
    }
}