<?php

namespace Paymenter\Extensions\Others\SocialBase\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;
use App\Models\User;

class Conversation extends Model
{
    use SoftDeletes;

    protected $table = 'ext_social_conversations';

    protected $fillable = [
        'type',
        'subject',
        'created_by',
        'last_message_at',
        'metadata',
    ];

    protected $casts = [
        'last_message_at' => 'datetime',
        'metadata' => 'array',
    ];

    /**
     * Get the creator of the conversation
     */
    public function creator(): BelongsTo
    {
        return $this->belongsTo(User::class, 'created_by');
    }

    /**
     * Get all participants
     */
    public function participants(): BelongsToMany
    {
        return $this->belongsToMany(User::class, 'ext_social_conversation_participants', 'conversation_id', 'user_id')
            ->withPivot('last_read_at', 'is_muted', 'is_archived', 'is_pinned')
            ->withTimestamps();
    }

    /**
     * Get all messages
     */
    public function messages(): HasMany
    {
        return $this->hasMany(Message::class)->orderBy('created_at', 'asc');
    }

    /**
     * Get the last message
     */
    public function lastMessage()
    {
        return $this->hasOne(Message::class)->latestOfMany();
    }

    /**
     * Get unread messages count for a user
     */
    public function getUnreadCountForUser($userId): int
    {
        $participant = $this->participants()->where('user_id', $userId)->first();
        
        if (!$participant) {
            return 0;
        }

        return $this->messages()
            ->where('sender_id', '!=', $userId)
            ->where('created_at', '>', $participant->pivot->last_read_at ?? $this->created_at)
            ->count();
    }

    /**
     * Mark conversation as read for user
     */
    public function markAsReadForUser($userId): void
    {
        $this->participants()->updateExistingPivot($userId, [
            'last_read_at' => now(),
        ]);
    }

    /**
     * Check if user is participant
     */
    public function hasParticipant($userId): bool
    {
        return $this->participants()->where('user_id', $userId)->exists();
    }

    /**
     * Get other participant in a direct conversation
     */
    public function getOtherParticipant($userId)
    {
        if ($this->type !== 'direct') {
            return null;
        }

        return $this->participants()->where('user_id', '!=', $userId)->first();
    }

    /**
     * Find or create a direct conversation between two users
     */
    public static function findOrCreateDirectConversation($userId1, $userId2): self
    {
        // Try to find existing conversation
        $conversation = self::where('type', 'direct')
            ->whereHas('participants', function ($query) use ($userId1) {
                $query->where('user_id', $userId1);
            })
            ->whereHas('participants', function ($query) use ($userId2) {
                $query->where('user_id', $userId2);
            })
            ->first();

        if ($conversation) {
            return $conversation;
        }

        // Create new conversation
        $conversation = self::create([
            'type' => 'direct',
            'created_by' => $userId1,
        ]);

        $conversation->participants()->attach([$userId1, $userId2]);

        return $conversation;
    }
    
    /**
     * Check if conversation is pinned for a user
     */
    public function isPinnedForUser($userId): bool
    {
        $participant = $this->participants()->where('user_id', $userId)->first();
        return $participant ? (bool) $participant->pivot->is_pinned : false;
    }
    
    /**
     * Toggle pinned status for a user
     */
    public function togglePinForUser($userId): bool
    {
        $participant = $this->participants()->where('user_id', $userId)->first();
        
        if (!$participant) {
            return false;
        }
        
        $newPinnedStatus = !$participant->pivot->is_pinned;
        
        $this->participants()->updateExistingPivot($userId, [
            'is_pinned' => $newPinnedStatus
        ]);
        
        return $newPinnedStatus;
    }
}