<?php

namespace Modules\Workflow\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\MorphTo;

final class WorkflowInstance extends Model
{
    protected $fillable = ['workflow_definition_id', 'workflow_stage_id', 'subject_type', 'subject_id', 'status', 'started_by', 'assigned_to', 'due_at', 'completed_at'];

    protected function casts(): array
    {
        return ['due_at' => 'datetime', 'completed_at' => 'datetime'];
    }

    public function definition(): BelongsTo
    {
        return $this->belongsTo(WorkflowDefinition::class, 'workflow_definition_id');
    }

    public function stage(): BelongsTo
    {
        return $this->belongsTo(WorkflowStage::class, 'workflow_stage_id');
    }

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

    public function history(): HasMany
    {
        return $this->hasMany(WorkflowHistory::class)->latest();
    }
}