<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Integrations\Divi\Design;

use Brain\Monkey\Functions;
use Closure;
use LIT\MCP\Integrations\Divi\Design\AssignRewrite;
use LIT\MCP\Integrations\Divi\Design\DesignSystemWriter;
use LIT\MCP\Integrations\Divi\Design\DiviPresetsAssignAbility;
use LIT\MCP\Integrations\Divi\Design\ModuleUsageQuery;
use LIT\MCP\Integrations\Divi\Design\PageRewriter;
use LIT\MCP\Integrations\Divi\Design\PresetAssignment;
use LIT\MCP\Integrations\Divi\Design\PresetBook;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use Mockery\MockInterface;
use ReflectionProperty;

final class DiviPresetsAssignAbilityTest extends TestCase
{
    protected function setUp(): void
    {
        parent::setUp();
        Functions\when('current_user_can')->justReturn(true);
    }

    private function ability(PageRewriter $pages): DiviPresetsAssignAbility
    {
        $writer = Mockery::mock(DesignSystemWriter::class);
        $writer->allows('presets')->andReturn(PresetBookTest::stored());
        $writer->allows('canUseVisualBuilder')->andReturn(true);

        return new DiviPresetsAssignAbility(
            $writer,
            $pages,
            static fn (): PresetAssignment => new PresetAssignment(
                static fn (): PresetBook => PresetBook::fromDivi(PresetBookTest::stored()),
                static fn (string $module): array => $module === 'divi/text'
                    ? ['content.decoration.bodyFont' => 'divi/font-body']
                    : [],
                static fn (string $id): bool => preg_match('/^[0-9a-z]{10}$/', $id) === 1
            )
        );
    }

    /** A PageRewriter that must not be asked at all. */
    private static function untouched(): PageRewriter&MockInterface
    {
        $pages = Mockery::mock(PageRewriter::class);
        $pages->expects('preview')->never();
        $pages->expects('apply')->never();

        return $pages;
    }

    private static function moduleOf(ModuleUsageQuery $query): string
    {
        return (new ReflectionProperty(ModuleUsageQuery::class, 'module'))->getValue($query);
    }

    private static function onlyWithOf(AssignRewrite $rewrite): ?string
    {
        return (new ReflectionProperty(AssignRewrite::class, 'onlyWithPresetId'))->getValue($rewrite);
    }

    public function testNeedsEditThemeOptionsAndTheVisualBuilder(): void
    {
        $ability = $this->ability(self::untouched());
        Functions\when('current_user_can')->justReturn(false);
        $input = ['module' => 'button', 'preset' => 'CTA primär'];

        self::assertToolError($ability->permission($input), 'forbidden');
        self::assertToolError($ability->execute($input), 'forbidden');
    }

    public function testUnknownPresetIsRefusedBeforeAnyPageIsRead(): void
    {
        $result = $this->ability(self::untouched())->execute(['module' => 'button', 'preset' => 'Fehlt']);

        self::assertToolError($result, 'validation_failed');
        self::assertArrayHasKey('preset', self::errorFields($result));
    }

    public function testOnlyWithAndOnlyWithoutPresetExcludeEachOther(): void
    {
        $result = $this->ability(self::untouched())->execute([
            'module' => 'button',
            'preset' => 'CTA primär',
            'only_without_preset' => true,
            'only_with_preset' => 'aaaaaaaaaa',
        ]);

        self::assertToolError($result, 'validation_failed');
        self::assertSame(
            ['only_with_preset' => 'nicht zusammen mit only_without_preset'],
            self::errorFields($result)
        );
    }

    public function testNullAndMissingAssignmentPointToDetach(): void
    {
        $ability = $this->ability(self::untouched());

        $null = $ability->execute(['module' => 'button', 'preset' => null]);
        self::assertToolError($null, 'validation_failed');
        self::assertStringContainsString('lit/divi-design-detach', self::errorFields($null)['preset']);

        $groupNull = $ability->execute(['module' => 'text', 'group_presets' => ['font-body' => null]]);
        self::assertStringContainsString(
            'lit/divi-design-detach',
            self::errorFields($groupNull)['group_presets.font-body']
        );

        $missing = $ability->execute(['module' => 'button']);
        self::assertSame('preset oder group_presets angeben', self::errorFields($missing)['preset']);
    }

    public function testEmptyStringAssignmentPointsToDetachToo(): void
    {
        $ability = $this->ability(self::untouched());

        $empty = $ability->execute(['module' => 'button', 'preset' => '', 'confirm' => true]);
        self::assertToolError($empty, 'validation_failed');
        self::assertStringContainsString('lit/divi-design-detach', self::errorFields($empty)['preset']);

        $group = $ability->execute(['module' => 'text', 'group_presets' => ['font-body' => ''], 'confirm' => true]);
        self::assertToolError($group, 'validation_failed');
        self::assertStringContainsString(
            'lit/divi-design-detach',
            self::errorFields($group)['group_presets.font-body']
        );
    }

    public function testInputSchemaForbidsEmptyPresetStrings(): void
    {
        $schema = $this->ability(self::untouched())->inputSchema()['properties']['preset'];

        self::assertSame(1, $schema['minLength']);
    }

    public function testBadModuleFiltersAndPostIdsAreCollected(): void
    {
        $ability = $this->ability(self::untouched());

        $fields = self::errorFields($ability->execute([
            'module' => 'Button!',
            'preset' => 'CTA primär',
            'post_ids' => [0],
            'clear_overrides' => 'ja',
        ]));
        self::assertSame(['module', 'post_ids', 'clear_overrides'], array_keys($fields));

        $unknown = self::errorFields($ability->execute([
            'module' => 'button',
            'preset' => 'CTA primär',
            'only_with_preset' => 'Fehlt',
        ]));
        self::assertSame('unbekanntes Modul-Preset divi/button „Fehlt“', $unknown['only_with_preset']);
    }

    public function testDryRunListsThePagesAndWritesNothing(): void
    {
        $pages = Mockery::mock(PageRewriter::class);
        $pages->expects('preview')
            ->with(
                Mockery::on(static fn (ModuleUsageQuery $query): bool => self::moduleOf($query) === 'divi/button'),
                Mockery::on(static fn (Closure $rewrite): bool => $rewrite() instanceof AssignRewrite),
                null
            )
            ->andReturn(PageRewriteReportTest::preview(2));
        $pages->expects('apply')->never();

        $dry = self::assertToolError(
            $this->ability($pages)->execute(['module' => 'button', 'preset' => ['CTA primär', 'cccccccccc']]),
            'confirm_required'
        );

        self::assertSame([12, 13], array_column($dry['pages'], 'post_id'));
        self::assertSame(2, $dry['pages_count']);
        self::assertStringStartsWith('Zuweisung an divi/button – betroffen (Seiten: 2, Module: 2).', $dry['message']);
        self::assertStringContainsString('confirm: true', $dry['message']);
    }

    public function testEmptyDryRunIsNothingToDo(): void
    {
        $pages = Mockery::mock(PageRewriter::class);
        $pages->expects('preview')->andReturn(PageRewriteReportTest::preview(0));
        $pages->expects('apply')->never();

        $result = $this->ability($pages)->execute(['module' => 'button', 'preset' => 'CTA primär']);

        self::assertTrue($result['ok']);
        self::assertSame('Zuweisung an divi/button – keine Seite betroffen, nichts zu tun.', $result['summary']);
        self::assertSame([[], 0], [$result['saved'], $result['remaining']]);
    }

    public function testConfirmWritesAndReportsWhatRemains(): void
    {
        $pages = Mockery::mock(PageRewriter::class);
        $pages->expects('preview')->never();
        $pages->expects('apply')
            ->with(
                'lit/divi-presets-assign',
                Mockery::on(static fn (ModuleUsageQuery $query): bool => self::moduleOf($query) === 'divi/button'),
                Mockery::on(static fn (Closure $rewrite): bool => self::onlyWithOf($rewrite()) === 'aaaaaaaaaa'),
                [12, 13],
                'Zuweisung an divi/button'
            )
            ->andReturn(PageRewriteReportTest::applied(2, 3));

        $result = $this->ability($pages)->execute([
            'module' => 'divi/button',
            'preset' => ['bbbbbbbbbb', 'cccccccccc'],
            'only_with_preset' => 'CTA primär',
            'post_ids' => [12, 13],
            'confirm' => true,
        ]);

        self::assertTrue($result['ok']);
        self::assertSame(3, $result['remaining']);
        self::assertSame([900, 901], array_column($result['saved'], 'revision_id'));
        self::assertStringContainsString('Noch 3 Seiten offen', $result['summary']);
        self::assertStringContainsString('confirm: true', $result['summary']);
    }

    public function testSchemaAndMeta(): void
    {
        $ability = $this->ability(self::untouched());
        $schema = $ability->inputSchema();

        self::assertSame('lit/divi-presets-assign', $ability->name());
        self::assertFalse($ability->isDirect());
        self::assertSame(['readonly' => false, 'destructive' => false, 'idempotent' => true], $ability->annotations());
        self::assertSame(['module'], $schema['required']);
        self::assertFalse($schema['additionalProperties']);
        self::assertSame(PresetAssignment::MAX_STACK, $schema['properties']['preset']['maxItems']);
        self::assertArrayNotHasKey('design_rev', $schema['properties']);
        self::assertSame(['saved', 'remaining', 'skipped'], array_slice($ability->outputSchema()['required'], -3));
        self::assertStringContainsString('gewinnt das letzte Preset im Stapel', $ability->description());
    }
}