<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
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 Illuminate\Support\Str;

class TranscriptionProject extends Model
{
    use HasFactory, SoftDeletes;

    protected $fillable = [
        'uuid',
        'title',
        'description',
        'owner_user_id',
        'original_filename',
        'stored_audio_path',
        'mime_type',
        'file_size',
        'duration_seconds',
        'language',
        'transcription_status',
        'transcription_engine',
        'transcript_text',
        'transcript_confidence',
        'error_message',
        'processed_at',
    ];

    protected function casts(): array
    {
        return [
            'transcript_text'       => 'encrypted',  // enkripsi kandungan sensitif
            'transcript_confidence' => 'float',
            'processed_at'          => 'datetime',
            'file_size'             => 'integer',
            'duration_seconds'      => 'integer',
        ];
    }

    protected static function booted(): void
    {
        static::creating(function (self $project) {
            if (empty($project->uuid)) {
                $project->uuid = (string) Str::uuid();
            }
        });
    }

    // Route model binding gunakan uuid
    public function getRouteKeyName(): string
    {
        return 'uuid';
    }

    // -------------------------------------------------------
    // Relationships
    // -------------------------------------------------------

    public function owner(): BelongsTo
    {
        return $this->belongsTo(User::class, 'owner_user_id');
    }

    public function collaborators(): BelongsToMany
    {
        return $this->belongsToMany(User::class, 'project_collaborators', 'project_id', 'user_id')
            ->withPivot('role', 'added_by')
            ->withTimestamps();
    }

    public function projectCollaborators(): HasMany
    {
        return $this->hasMany(ProjectCollaborator::class, 'project_id');
    }

    public function transcriptVersions(): HasMany
    {
        return $this->hasMany(TranscriptVersion::class, 'project_id')->orderByDesc('version_number');
    }

    public function comments(): HasMany
    {
        return $this->hasMany(ProjectComment::class, 'project_id')->latest();
    }

    // -------------------------------------------------------
    // Helpers
    // -------------------------------------------------------

    public function isOwnedBy(User $user): bool
    {
        return $this->owner_user_id === $user->id;
    }

    public function hasCollaborator(User $user): bool
    {
        return $this->collaborators()->where('user_id', $user->id)->exists();
    }

    public function isAccessibleBy(User $user): bool
    {
        return $this->isOwnedBy($user) || $this->hasCollaborator($user);
    }

    public function isPending(): bool
    {
        return $this->transcription_status === 'pending';
    }

    public function isProcessing(): bool
    {
        return $this->transcription_status === 'processing';
    }

    public function isCompleted(): bool
    {
        return $this->transcription_status === 'completed';
    }

    public function isFailed(): bool
    {
        return $this->transcription_status === 'failed';
    }

    public function fileSizeForHumans(): string
    {
        $bytes = $this->file_size;
        if ($bytes >= 1073741824) {
            return number_format($bytes / 1073741824, 2) . ' GB';
        }
        if ($bytes >= 1048576) {
            return number_format($bytes / 1048576, 2) . ' MB';
        }
        return number_format($bytes / 1024, 2) . ' KB';
    }

    public function durationForHumans(): ?string
    {
        if (! $this->duration_seconds) {
            return null;
        }
        $m = intdiv($this->duration_seconds, 60);
        $s = $this->duration_seconds % 60;
        return sprintf('%d:%02d', $m, $s);
    }
}