<?php

namespace App\Models;

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

class ProgressSnapshot extends Model
{
    protected $fillable = [
        'trackable_type',
        'trackable_id',
        'snapshot_date',
        'progress',
        'planned_start',
        'planned_end',
        'actual_start',
        'actual_end',
        'method',
        'metadata',
    ];

    protected $casts = [
        'snapshot_date' => 'date',
        'planned_start' => 'date',
        'planned_end' => 'date',
        'actual_start' => 'date',
        'actual_end' => 'date',
        'progress' => 'decimal:2',
        'metadata' => 'array',
    ];

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

    /**
     * Scope for a specific date range
     */
    public function scopeDateRange($query, $from, $to)
    {
        return $query->whereBetween('snapshot_date', [$from, $to]);
    }

    /**
     * Scope for specific trackable
     */
    public function scopeForTrackable($query, $model, $id = null)
    {
        $query->where('trackable_type', $model);
        if ($id) {
            $query->where('trackable_id', $id);
        }

        return $query;
    }

    /**
     * Get latest snapshot for a trackable
     */
    public static function latestFor($model, $id): ?self
    {
        return static::forTrackable($model, $id)
            ->latest('snapshot_date')
            ->first();
    }

    /**
     * Get progress trend (last N snapshots)
     */
    public static function trendFor($model, $id, int $limit = 10): array
    {
        return static::forTrackable($model, $id)
            ->orderBy('snapshot_date')
            ->take($limit)
            ->get(['snapshot_date', 'progress', 'method'])
            ->toArray();
    }
}