<?php

declare(strict_types=1);

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

use Brain\Monkey\Functions;
use LIT\MCP\Integrations\Divi\Design\ColorBook;
use LIT\MCP\Integrations\Divi\Design\ColorRestorePlanner;
use LIT\MCP\Integrations\Divi\Design\DesignChange;
use LIT\MCP\Integrations\Divi\Design\DesignSystemWriter;
use LIT\MCP\Integrations\Divi\Design\DiviDesignRestoreAbility;
use LIT\MCP\Integrations\Divi\Design\GlobalColorsAdapter;
use LIT\MCP\Integrations\Divi\Design\GlobalVariablesAdapter;
use LIT\MCP\Integrations\Divi\Design\PresetRestorePlanner;
use LIT\MCP\Integrations\Divi\Design\SnapshotStore;
use LIT\MCP\Integrations\Divi\Design\ThemeOptionBook;
use LIT\MCP\Integrations\Divi\Design\ThemeOptionsAdapter;
use LIT\MCP\Integrations\Divi\Design\ThemeOptionsRestorePlanner;
use LIT\MCP\Integrations\Divi\Design\VariableRestorePlanner;
use LIT\MCP\Integrations\Divi\Release\DiviFeature;
use LIT\MCP\Tests\Support\FakeChangeLog;
use LIT\MCP\Tests\Support\LockTable;
use LIT\MCP\Tests\Unit\TestCase;
use Mockery;
use Mockery\MockInterface;

final class DiviDesignRestoreAbilityTest extends TestCase
{
    protected function setUp(): void
    {
        parent::setUp();
        // DesignLock (final review I-5): the lock is always free here.
        LockTable::install();
    }

    public function testRestoresWithDryRunAndASnapshotOfTheCurrentState(): void
    {
        Functions\when('current_user_can')->justReturn(true);
        $older = PresetBookTest::stored();
        unset($older['module']['divi/button']['items']['bbbbbbbbbb']);
        $writer = Mockery::mock(DesignSystemWriter::class);
        $writer->allows('presets')->andReturn(PresetBookTest::stored());
        $writer->allows('canUseVisualBuilder')->andReturn(true);
        $writer->expects('savePresets')->with(Mockery::type('array'), true)->andReturn($older);
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->allows('get')->with('presets', 'presets-20261016T100000Z-aaaaaa')->andReturn(['id' => 'presets-20261016T100000Z-aaaaaa', 'data' => $older,
            'created' => 'x', 'user_id' => 1, 'ability' => 'lit/divi-presets-set', 'log_id' => 2, 'size' => 1]);
        $snapshots->expects('save')->with('presets', Mockery::type('array'), 'lit/divi-design-restore')->andReturn('presets-3');
        $snapshots->expects('attachLog');
        $ability = new DiviDesignRestoreAbility(
            new DesignChange($snapshots, new FakeChangeLog(8)),
            $snapshots,
            new PresetRestorePlanner($writer)
        );

        $dry = self::assertToolError($ability->execute(['snapshot_id' => 'presets-20261016T100000Z-aaaaaa']), 'confirm_required');
        self::assertSame('removed', $dry['diff'][0]['action']);

        $result = $ability->execute(['snapshot_id' => 'presets-20261016T100000Z-aaaaaa', 'confirm' => true, 'design_rev' => $dry['design_rev']]);
        self::assertSame('presets-3', $result['snapshot_id']);
    }

    private static function snapshotOf(array $data): array
    {
        return ['id' => 'presets-20261016T100000Z-aaaaaa', 'data' => $data, 'created' => 'x', 'user_id' => 1,
            'ability' => 'lit/divi-presets-set', 'log_id' => 2, 'size' => 1];
    }

    private static function restoring(array $current, array $snapshot, bool $unfiltered): DiviDesignRestoreAbility
    {
        Functions\when('current_user_can')->justReturn(true);
        $writer = Mockery::mock(DesignSystemWriter::class);
        $writer->allows('presets')->andReturn($current);
        $writer->allows('canUseVisualBuilder')->andReturn(true);
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->allows('get')->andReturn(self::snapshotOf($snapshot));
        $snapshots->shouldNotReceive('save');

        return new DiviDesignRestoreAbility(
            new DesignChange($snapshots, FakeChangeLog::forbidden()),
            $snapshots,
            new PresetRestorePlanner($writer, static fn (): bool => $unfiltered)
        );
    }

    /** Final review I-2: markup in the snapshot or in the current inventory is lost for editors – refused. */
    public function testEditorIsRefusedWhenTheSnapshotOrTheInventoryCarriesMarkup(): void
    {
        $plain = PresetBookTest::stored();
        $markup = PresetBookTest::storedWithMarkup();
        $older = $plain;
        unset($older['module']['divi/button']['items']['cccccccccc']);
        $input = ['snapshot_id' => 'presets-20261016T100000Z-aaaaaa'];

        $inSnapshot = self::assertToolError(self::restoring($plain, $markup, false)->execute($input), 'forbidden');
        self::assertStringContainsString('unfiltered_html', $inSnapshot['message']);
        self::assertToolError(self::restoring($markup, $older, false)->execute($input), 'forbidden');

        self::assertToolError(self::restoring($plain, $markup, true)->execute($input), 'confirm_required');
        self::assertToolError(self::restoring($plain, $older, false)->execute($input), 'confirm_required');
    }

    /** T13: restoring needs the preset rights. */
    public function testNeedsEditThemeOptions(): void
    {
        Functions\when('current_user_can')->justReturn(false);
        $writer = Mockery::mock(DesignSystemWriter::class);
        $writer->allows('canUseVisualBuilder')->andReturn(true);
        $writer->shouldNotReceive('savePresets');
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->shouldNotReceive('get');
        $ability = new DiviDesignRestoreAbility(
            new DesignChange($snapshots, FakeChangeLog::forbidden()),
            $snapshots,
            new PresetRestorePlanner($writer)
        );
        $input = ['snapshot_id' => 'presets-20261016T100000Z-aaaaaa', 'confirm' => true, 'design_rev' => 'x'];

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

    public function testUnknownSnapshots(): void
    {
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->allows('get')->andReturn(null);
        $ability = self::allAreas($snapshots, self::colorStore([]), self::variableStore([]));

        self::assertToolError($ability->execute(['snapshot_id' => 'presets-20261016T100000Z-abcdef']), 'not_found');
        self::assertToolError($ability->execute(['snapshot_id' => 'colors-20261016T100000Z-abcdef']), 'not_found');
        self::assertToolError($ability->execute(['snapshot_id' => 'variables-20261016T100000Z-abcdef']), 'not_found');
        self::assertToolError(
            $ability->execute(['snapshot_id' => 'theme_options-20261016T100000Z-abcdef']),
            'not_found'
        );
        self::assertToolError($ability->execute(['snapshot_id' => 'kaputt']), 'validation_failed');
    }

    /** A snapshot area whose planner is not wired stays unsupported (W11) – never a silent no-op. */
    public function testAnAreaWithoutAPlannerIsUnsupported(): void
    {
        Functions\when('current_user_can')->justReturn(true);
        $writer = Mockery::mock(DesignSystemWriter::class);
        $writer->allows('canUseVisualBuilder')->andReturn(true);
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->shouldNotReceive('get');
        $ability = new DiviDesignRestoreAbility(
            new DesignChange($snapshots, FakeChangeLog::forbidden()),
            $snapshots,
            new PresetRestorePlanner($writer)
        );

        $error = self::assertToolError(
            $ability->execute(['snapshot_id' => ThemeOptionsRestorePlannerTest::SNAPSHOT_ID]),
            'unsupported'
        );
        self::assertStringNotContainsString('4d', $error['hint']);
    }

    /** The ability with the planners of all four areas; the user has every right unless a store says otherwise. */
    private static function allAreas(
        SnapshotStore $snapshots,
        GlobalColorsAdapter $colors,
        GlobalVariablesAdapter $variables,
        ?FakeChangeLog $log = null,
        ?ThemeOptionsAdapter $options = null
    ): DiviDesignRestoreAbility {
        Functions\when('current_user_can')->justReturn(true);
        $writer = Mockery::mock(DesignSystemWriter::class);
        $writer->allows('canUseVisualBuilder')->andReturn(true);
        $writer->allows('presets')->andReturn(PresetBookTest::stored());
        $writer->shouldNotReceive('savePresets');
        $noOptions = [];

        return new DiviDesignRestoreAbility(
            new DesignChange($snapshots, $log ?? FakeChangeLog::forbidden()),
            $snapshots,
            new PresetRestorePlanner($writer),
            new ColorRestorePlanner($writer, $colors),
            new VariableRestorePlanner($writer, $variables),
            new ThemeOptionsRestorePlanner($options ?? self::optionStore($noOptions))
        );
    }

    /**
     * A theme options adapter that reads what it last wrote, starting with $stored (ThemeOptionsAreaTest::adapter()).
     *
     * @param array<string, int|float|string|false> $stored
     */
    private static function optionStore(array &$stored, bool $customize = true): ThemeOptionsAdapter
    {
        $writes = [];

        return ThemeOptionsAreaTest::adapter($stored, $writes, null, $customize);
    }

    /**
     * A colors adapter that reads what it last saved, starting with $stored.
     *
     * @param array<string, array<string, mixed>> $stored
     */
    private static function colorStore(array $stored): GlobalColorsAdapter&MockInterface
    {
        $colors = Mockery::mock(GlobalColorsAdapter::class);
        $colors->allows('read')->andReturnUsing(static function () use (&$stored): array {
            return $stored;
        });
        $colors->allows('save')->andReturnUsing(static function (array $entries, bool $replace) use (&$stored): void {
            self::assertTrue($replace, 'a restore replaces every color (V4)');
            $stored = $entries;
        });

        return $colors;
    }

    /**
     * A variables adapter that reads what it last saved, starting with $stored.
     *
     * @param array<string, array<string, array<string, mixed>>> $stored
     */
    private static function variableStore(array $stored, bool $manage = true): GlobalVariablesAdapter&MockInterface
    {
        $variables = Mockery::mock(GlobalVariablesAdapter::class);
        $variables->allows('canManage')->andReturn($manage);
        $variables->allows('read')->andReturnUsing(static function () use (&$stored): array {
            return $stored;
        });
        $variables->allows('save')->andReturnUsing(static function (array $data) use (&$stored): void {
            $stored = $data;
        });

        return $variables;
    }

    /** @param array<array-key, mixed> $data */
    private static function snapshotIn(string $area, string $id, array $data): array
    {
        return ['id' => $id, 'data' => $data, 'created' => 'x', 'user_id' => 1, 'ability' => 'lit/divi-' . $area . '-set',
            'log_id' => 2, 'size' => 1];
    }

    public function testRestoresColorsWithDryRunAndASnapshotOfTheCurrentColors(): void
    {
        $id = ColorRestorePlannerTest::SNAPSHOT_ID;
        $colors = self::colorStore(ColorRestorePlannerTest::current());
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->allows('get')->with('colors', $id)
            ->andReturn(self::snapshotIn('colors', $id, ColorRestorePlannerTest::snapshot()));
        $snapshots->expects('save')
            ->with('colors', ColorBook::fromDivi(ColorRestorePlannerTest::current())->data(), 'lit/divi-design-restore')
            ->andReturn('colors-5');
        $snapshots->expects('attachLog');
        $ability = self::allAreas($snapshots, $colors, self::variableStore([]), new FakeChangeLog(8));

        $dry = self::assertToolError($ability->execute(['snapshot_id' => $id]), 'confirm_required');
        self::assertSame(['changed', 'removed'], array_column($dry['diff'], 'action'));
        self::assertStringContainsString('„Akzent“', $dry['warnings'][0]);

        $result = $ability->execute(['snapshot_id' => $id, 'confirm' => true, 'design_rev' => $dry['design_rev']]);
        self::assertSame('colors-5', $result['snapshot_id']);
        self::assertSame(ColorBook::fromDivi(ColorRestorePlannerTest::snapshot())->data(), $colors->read());
    }

    public function testRestoresVariablesAndKeepsNewerOnesArchived(): void
    {
        $id = VariableRestorePlannerTest::SNAPSHOT_ID;
        $variables = self::variableStore(VariableRestorePlannerTest::current());
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->allows('get')->with('variables', $id)
            ->andReturn(self::snapshotIn('variables', $id, VariableRestorePlannerTest::snapshot()));
        $snapshots->expects('save')
            ->with('variables', Mockery::type('array'), 'lit/divi-design-restore')
            ->andReturn('variables-5');
        $snapshots->expects('attachLog');
        $ability = self::allAreas($snapshots, self::colorStore([]), $variables, new FakeChangeLog(8));

        $dry = self::assertToolError($ability->execute(['snapshot_id' => $id]), 'confirm_required');
        self::assertStringContainsString('„Neu“', $dry['warnings'][0]);

        $result = $ability->execute(['snapshot_id' => $id, 'confirm' => true, 'design_rev' => $dry['design_rev']]);
        self::assertSame('variables-5', $result['snapshot_id']);
        $stored = $variables->read();
        self::assertSame('4px', $stored['numbers']['gvid-radius0001']['value']);
        self::assertSame('archived', $stored['numbers']['gvid-neu0000001']['status']);
    }

    public function testRestoresThemeOptionsAndResetsTheKeysTheSnapshotLacks(): void
    {
        $id = ThemeOptionsRestorePlannerTest::SNAPSHOT_ID;
        $stored = ThemeOptionsRestorePlannerTest::current();
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->allows('get')->with('theme_options', $id)
            ->andReturn(self::snapshotIn('theme_options', $id, ThemeOptionsRestorePlannerTest::snapshot()));
        $snapshots->expects('save')
            ->with(
                'theme_options',
                ThemeOptionBook::fromDivi(ThemeOptionsRestorePlannerTest::current())->data(),
                'lit/divi-design-restore'
            )
            ->andReturn('theme_options-5');
        $snapshots->expects('attachLog');
        $ability = self::allAreas(
            $snapshots,
            self::colorStore([]),
            self::variableStore([]),
            new FakeChangeLog(8),
            self::optionStore($stored)
        );

        $dry = self::assertToolError($ability->execute(['snapshot_id' => $id]), 'confirm_required');
        self::assertSame(['added', 'changed', 'reset'], array_column($dry['diff'], 'action'));
        self::assertStringContainsString('Divi-Standard', $dry['warnings'][1]);

        $result = $ability->execute(['snapshot_id' => $id, 'confirm' => true, 'design_rev' => $dry['design_rev']]);
        self::assertSame('theme_options-5', $result['snapshot_id']);
        self::assertSame(
            ThemeOptionBook::fromDivi(ThemeOptionsRestorePlannerTest::snapshot())->data(),
            ThemeOptionBook::fromDivi($stored)->data()
        );
    }

    /** Spec §10, V10: the rights are those of the snapshot's area. */
    public function testRightsFollowTheSnapshotArea(): void
    {
        $snapshots = Mockery::mock(SnapshotStore::class);
        $snapshots->shouldNotReceive('get');
        $options = [];
        $ability = self::allAreas(
            $snapshots,
            self::colorStore([]),
            self::variableStore([], false),
            null,
            self::optionStore($options, false)
        );

        self::assertToolError(
            $ability->permission(['snapshot_id' => VariableRestorePlannerTest::SNAPSHOT_ID]),
            'forbidden'
        );
        self::assertToolError(
            $ability->execute(['snapshot_id' => VariableRestorePlannerTest::SNAPSHOT_ID]),
            'forbidden'
        );
        self::assertToolError(
            $ability->permission(['snapshot_id' => ThemeOptionsRestorePlannerTest::SNAPSHOT_ID]),
            'forbidden'
        );
        self::assertTrue($ability->permission(['snapshot_id' => ColorRestorePlannerTest::SNAPSHOT_ID]));
        self::assertTrue($ability->permission(['snapshot_id' => 'presets-20261016T100000Z-aaaaaa']));
        self::assertToolError($ability->permission(['snapshot_id' => 'kaputt']), 'forbidden', 'fail closed');
    }

    public function testFeaturesFollowTheSnapshotArea(): void
    {
        $ability = self::allAreas(Mockery::mock(SnapshotStore::class), self::colorStore([]), self::variableStore([]));

        self::assertSame(
            [DiviFeature::DesignRead, DiviFeature::ColorWrite],
            $ability->diviFeatures(['snapshot_id' => ColorRestorePlannerTest::SNAPSHOT_ID])
        );
        self::assertSame(
            [DiviFeature::DesignRead, DiviFeature::VariableWrite],
            $ability->diviFeatures(['snapshot_id' => VariableRestorePlannerTest::SNAPSHOT_ID])
        );
        self::assertSame(
            [DiviFeature::DesignRead, DiviFeature::PresetWrite],
            $ability->diviFeatures(['snapshot_id' => 'presets-20261016T100000Z-aaaaaa'])
        );
        self::assertSame(
            [DiviFeature::ThemeOptionRead, DiviFeature::ThemeOptionWrite],
            $ability->diviFeatures(['snapshot_id' => ThemeOptionsRestorePlannerTest::SNAPSHOT_ID])
        );
        self::assertSame(
            [DiviFeature::DesignRead, DiviFeature::PresetWrite, DiviFeature::ColorWrite, DiviFeature::VariableWrite,
                DiviFeature::ThemeOptionRead, DiviFeature::ThemeOptionWrite],
            $ability->diviFeatures([])
        );
    }
}