<?php

declare(strict_types=1);

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

use LIT\MCP\Integrations\Divi\Design\PresetOverrides;
use PHPUnit\Framework\TestCase;
use stdClass;

final class PresetOverridesTest extends TestCase
{
    private const SPACING = 'module.decoration.spacing';
    private const BODY_FONT = 'content.decoration.bodyFont';

    /** A breakpoint map with one desktop value, the shape Divi stores at an attribute path. */
    private static function desktop(mixed $value): array
    {
        return ['desktop' => ['value' => $value]];
    }

    /** Presets in Divi's stored format (formats §3): a module preset nesting a group preset, a group preset. */
    private static function overrides(): PresetOverrides
    {
        $items = [
            'mmmmmmmmmm' => [
                'type' => 'module', 'id' => 'mmmmmmmmmm', 'name' => 'Blurb Leistung', 'moduleName' => 'divi/blurb',
                'attrs' => [
                    'module' => ['decoration' => ['spacing' => self::desktop([
                        'padding' => ['top' => '20px', 'bottom' => '10px'],
                    ])]],
                    'title' => ['decoration' => ['font' => ['font' => self::desktop(['weight' => '700'])]]],
                ],
                'groupPresets' => [
                    'title.decoration.bodyFont' => ['presetId' => ['ffffffffff'], 'groupName' => 'divi/font-body'],
                ],
            ],
            'ssssssssss' => [
                'type' => 'group', 'id' => 'ssssssssss', 'name' => 'Abstand Karte', 'groupName' => 'divi/spacing',
                'groupId' => self::SPACING, 'moduleName' => 'divi/blurb',
                'attrs' => ['module' => ['decoration' => ['spacing' => self::desktop([
                    'margin' => ['bottom' => '24px'],
                ])]]],
            ],
            'ffffffffff' => [
                'type' => 'group', 'id' => 'ffffffffff', 'name' => 'Fließtext', 'groupName' => 'divi/font-body',
                'groupId' => self::BODY_FONT, 'moduleName' => 'divi/text',
                'attrs' => ['content' => ['decoration' => ['bodyFont' => ['desktop' => [
                    'value' => ['size' => '18px'],
                    'hover' => ['size' => '20px'],
                ], 'phone' => ['value' => ['size' => '16px']]]]]],
            ],
        ];

        return new PresetOverrides(static fn (string $id): ?array => $items[$id] ?? null);
    }

    public function testLeavesFlattenBreakpointsStatesAndSubpaths(): void
    {
        $leaves = PresetOverrides::leaves([
            'builderVersion' => '5.2.1',
            'modulePreset' => ['mmmmmmmmmm'],
            'groupPreset' => [self::SPACING => ['presetId' => ['ssssssssss'], 'groupName' => 'divi/spacing']],
            'module' => ['decoration' => ['spacing' => [
                'desktop' => ['value' => ['padding' => ['top' => '20px'], 'syncVertical' => 'on'], 'hover' => [
                    'margin' => ['bottom' => '4px'],
                ]],
                'phone' => ['value' => ['padding' => ['top' => '8px']]],
            ]]],
            'title' => ['innerContent' => self::desktop('Hallo'), 'decoration' => ['font' => ['font' => self::desktop(
                new stdClass()
            )]]],
            'content' => ['decoration' => ['bodyFont' => self::desktop(['families' => ['Lato', 'Arial']])]],
        ]);

        self::assertSame(
            [
                'content.decoration.bodyFont|desktop|value|families' => ['Lato', 'Arial'],
                'module.decoration.spacing|desktop|value|padding.top' => '20px',
                'module.decoration.spacing|desktop|value|syncVertical' => 'on',
                'module.decoration.spacing|desktop|hover|margin.bottom' => '4px',
                'module.decoration.spacing|phone|value|padding.top' => '8px',
                'title.innerContent|desktop|value|' => 'Hallo',
            ],
            $leaves
        );
    }

    public function testFindReportsOnlyDifferingValuesOfTheModulePreset(): void
    {
        $attrs = [
            'modulePreset' => ['mmmmmmmmmm'],
            'module' => ['decoration' => ['spacing' => self::desktop(['padding' => ['top' => '40px', 'bottom' => '10px']])]],
            // 700 as a number is the same value as "700" (the builder writes strings, an API client may not).
            'title' => ['decoration' => ['font' => ['font' => self::desktop(['weight' => 700])]]],
        ];

        self::assertSame(
            ['mmmmmmmmmm' => ['module.decoration.spacing|desktop|value|padding.top']],
            self::overrides()->find($attrs)
        );
    }

    public function testNoOverlapNoReport(): void
    {
        // A local padding.left does not cover the preset's padding.top/bottom (array_replace_recursive).
        $attrs = [
            'modulePreset' => ['mmmmmmmmmm'],
            'module' => ['decoration' => ['spacing' => self::desktop(['padding' => ['left' => '5px']])]],
            'title' => ['innerContent' => self::desktop('Text')],
        ];

        self::assertSame([], self::overrides()->find($attrs));
        self::assertSame([], self::overrides()->find([]));
    }

    public function testGroupPresetLeavesMoveFromTheStoredGroupIdToTheBlocksKey(): void
    {
        // The preset was made for content.decoration.bodyFont; this block uses it on text.decoration.bodyFont.
        $attrs = [
            'groupPreset' => ['text.decoration.bodyFont' => ['presetId' => ['ffffffffff'], 'groupName' => 'divi/font-body']],
            'text' => ['decoration' => ['bodyFont' => [
                'desktop' => ['value' => ['size' => '22px'], 'hover' => ['size' => '20px']],
                'phone' => ['value' => ['size' => '12px']],
            ]]],
            // Same path as the preset's stored groupId, but not the block's key: no overlap.
            'content' => ['decoration' => ['bodyFont' => self::desktop(['size' => '99px'])]],
        ];

        self::assertSame(
            ['ffffffffff' => [
                'text.decoration.bodyFont|desktop|value|size',
                'text.decoration.bodyFont|phone|value|size',
            ]],
            self::overrides()->find($attrs)
        );
    }

    public function testNestedGroupPresetsOfAnAssignedModulePresetCount(): void
    {
        $attrs = [
            'modulePreset' => ['mmmmmmmmmm'],
            'title' => ['decoration' => ['bodyFont' => self::desktop(['size' => '30px'])]],
        ];

        // The nested entry sits on title.decoration.bodyFont of the module preset; its leaves move there.
        self::assertSame(
            ['ffffffffff' => ['title.decoration.bodyFont|desktop|value|size']],
            self::overrides()->find($attrs)
        );
    }

    public function testPresetsNobodyAssignedAreNotCounted(): void
    {
        // Default presets ("", "default", "_initial") and unknown IDs are no explicit assignment (ruling R4).
        $attrs = [
            'modulePreset' => ['', 'default', '_initial', 'unbekannt'],
            'module' => ['decoration' => ['spacing' => self::desktop(['padding' => ['top' => '40px']])]],
        ];

        self::assertSame([], self::overrides()->find($attrs));
        self::assertSame($attrs, self::overrides()->clear($attrs));
    }

    public function testStackAndSingleStringAreRead(): void
    {
        $attrs = [
            'modulePreset' => 'mmmmmmmmmm',
            'groupPreset' => [self::SPACING => ['presetId' => 'ssssssssss', 'groupName' => 'divi/spacing']],
            'module' => ['decoration' => ['spacing' => self::desktop([
                'padding' => ['bottom' => '11px'], 'margin' => ['bottom' => '1px'],
            ])]],
        ];

        self::assertSame(
            [
                'mmmmmmmmmm' => ['module.decoration.spacing|desktop|value|padding.bottom'],
                'ssssssssss' => ['module.decoration.spacing|desktop|value|margin.bottom'],
            ],
            self::overrides()->find($attrs)
        );
    }

    public function testClearRemovesLocalLeavesOnPresetLeavesAndEmptyParents(): void
    {
        $attrs = [
            'builderVersion' => '5.2.1',
            'modulePreset' => ['mmmmmmmmmm'],
            'module' => ['decoration' => ['spacing' => self::desktop([
                // padding.top is a preset leaf (different value), padding.bottom too (same value), left is not.
                'padding' => ['top' => '40px', 'bottom' => '10px', 'left' => '5px'],
            ])]],
            'title' => [
                'innerContent' => self::desktop('Hallo'),
                'decoration' => ['font' => ['font' => self::desktop(['weight' => '400'])]],
            ],
        ];

        self::assertSame(
            [
                'builderVersion' => '5.2.1',
                'modulePreset' => ['mmmmmmmmmm'],
                'module' => ['decoration' => ['spacing' => self::desktop(['padding' => ['left' => '5px']])]],
                'title' => ['innerContent' => self::desktop('Hallo')],
            ],
            self::overrides()->clear($attrs)
        );
    }

    public function testClearDropsAWholeBranchWhenNothingElseIsLeft(): void
    {
        $attrs = [
            'modulePreset' => ['mmmmmmmmmm'],
            'title' => ['decoration' => ['font' => ['font' => self::desktop(['weight' => '400'])]]],
        ];

        self::assertSame(['modulePreset' => ['mmmmmmmmmm']], self::overrides()->clear($attrs));
    }

    public function testDescribeFollowsRulingR5(): void
    {
        $attrs = [
            'modulePreset' => ['mmmmmmmmmm'],
            'groupPreset' => ['text.decoration.bodyFont' => ['presetId' => ['ffffffffff'], 'groupName' => 'divi/font-body']],
            'module' => ['decoration' => ['spacing' => self::desktop(['padding' => ['top' => '40px']])]],
            'text' => ['decoration' => ['bodyFont' => [
                'desktop' => ['hover' => ['size' => '1px'], 'value' => ['size' => '2px']],
                'phone' => ['value' => ['size' => '3px']],
            ]]],
        ];
        $names = ['mmmmmmmmmm' => 'Blurb Leistung', 'ffffffffff' => 'Fließtext'];

        self::assertSame(
            [
                's0.r0.c0.m2: lokale Werte überdecken „Blurb Leistung“: module.decoration.spacing '
                    . '– clear_overrides: true entfernt sie.',
                's0.r0.c0.m2: lokale Werte überdecken „Fließtext“: text.decoration.bodyFont, '
                    . 'text.decoration.bodyFont (desktop, hover), text.decoration.bodyFont (phone) '
                    . '– clear_overrides: true entfernt sie.',
            ],
            self::overrides()->describe('s0.r0.c0.m2', $attrs, $names)
        );
    }

    public function testDescribeShowsAtMostFivePathsAndCountsTheRest(): void
    {
        $preset = ['id' => 'pppppppppp', 'name' => 'Viele', 'attrs' => []];
        $local = ['modulePreset' => ['pppppppppp']];
        foreach (range(1, 7) as $number) {
            $preset['attrs']['module']['decoration']['p' . $number] = self::desktop('a');
            $local['module']['decoration']['p' . $number] = self::desktop('b');
        }
        $overrides = new PresetOverrides(static fn (string $id): ?array => $id === 'pppppppppp' ? $preset : null);

        self::assertSame(
            ['x1: lokale Werte überdecken „pppppppppp“: module.decoration.p1, module.decoration.p2, '
                . 'module.decoration.p3, module.decoration.p4, module.decoration.p5 und 2 weitere '
                . '– clear_overrides: true entfernt sie.'],
            $overrides->describe('x1', $local, [])
        );
    }

    public function testDescribeIsEmptyWithoutOverrides(): void
    {
        self::assertSame([], self::overrides()->describe('s0', ['modulePreset' => ['mmmmmmmmmm']], []));
    }
}