<?php

namespace Relaticle\Comments\Models;

use Filament\Forms\Components\RichEditor\MentionProvider;
use Filament\Forms\Components\RichEditor\RichContentRenderer;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\MorphTo;
use Illuminate\Database\Eloquent\Relations\MorphToMany;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Support\Str;
use Relaticle\Comments\CommentsConfig;
use Relaticle\Comments\Database\Factories\CommentFactory;

class Comment extends Model
{
    use HasFactory;
    use SoftDeletes;

    protected static function boot(): void
    {
        parent::boot();

        static::saving(function (self $comment): void {
            $comment->body = Str::sanitizeHtml($comment->body);
        });

        static::deleting(function (self $comment): void {
            $comment->replies()->each(fn ($reply) => $reply->delete());
        });

        static::forceDeleting(function (self $comment): void {
            $comment->attachments()->delete();
            $comment->reactions()->delete();
            $comment->mentions()->detach();
        });
    }

    protected $fillable = [
        'body',
        'parent_id',
        'commenter_id',
        'commenter_type',
        'edited_at',
    ];

    public function getTable(): string
    {
        return CommentsConfig::getCommentTable();
    }

    /** @return array<string, string> */
    protected function casts(): array
    {
        return [
            'edited_at' => 'datetime',
        ];
    }

    protected static function newFactory(): CommentFactory
    {
        return CommentFactory::new();
    }

    public function commentable(): MorphTo
    {
        return $this->morphTo();
    }

    public function commenter(): MorphTo
    {
        return $this->morphTo();
    }

    public function parent(): BelongsTo
    {
        return $this->belongsTo(CommentsConfig::getCommentModel(), 'parent_id');
    }

    public function replies(): HasMany
    {
        return $this->hasMany(CommentsConfig::getCommentModel(), 'parent_id');
    }

    public function reactions(): HasMany
    {
        return $this->hasMany(Reaction::class);
    }

    public function attachments(): HasMany
    {
        return $this->hasMany(Attachment::class);
    }

    public function mentions(): MorphToMany
    {
        return $this->morphedByMany(
            CommentsConfig::getCommenterModel(),
            'commenter',
            CommentsConfig::getTableName('mentions'),
            'comment_id',
            'commenter_id',
        );
    }

    public function isReply(): bool
    {
        return $this->parent_id !== null;
    }

    public function isTopLevel(): bool
    {
        return $this->parent_id === null;
    }

    public function hasReplies(): bool
    {
        return $this->replies()->exists();
    }

    public function isEdited(): bool
    {
        return $this->edited_at !== null;
    }

    public function canReply(): bool
    {
        return $this->depth() < CommentsConfig::getMaxDepth();
    }

    public function depth(): int
    {
        $depth = 0;
        $maxDepth = CommentsConfig::getMaxDepth();
        $parentId = $this->parent_id;

        while ($parentId !== null && $depth < $maxDepth) {
            $depth++;
            $parentId = static::where('id', $parentId)->value('parent_id');
        }

        return $depth;
    }

    public function renderBodyWithMentions(): string
    {
        $body = $this->body;

        if ($this->hasRichEditorMentions($body)) {
            return RichContentRenderer::make($body)
                ->mentions([
                    MentionProvider::make('@')
                        ->getLabelsUsing(fn (array $ids): array => CommentsConfig::getCommenterModel()::query()
                            ->whereIn('id', $ids)
                            ->pluck('name', 'id')
                            ->all()),
                ])
                ->toHtml();
        }

        $mentionNames = $this->mentions->pluck('name')->filter()->unique();

        foreach ($mentionNames as $name) {
            $escapedName = e($name);
            $styledSpan = '<span class="comment-mention inline rounded bg-primary-50 px-1 font-medium text-primary-700 dark:bg-primary-900/30 dark:text-primary-300">@'.$escapedName.'</span>';

            $body = str_replace("&#64;{$name}", $styledSpan, $body);
            $body = str_replace("@{$name}", $styledSpan, $body);
        }

        return $body;
    }

    protected function hasRichEditorMentions(string $body): bool
    {
        return str_contains($body, 'data-type="mention"') || str_contains($body, '<p>') || str_contains($body, '<br');
    }
}