<?php

namespace Modules\ProjectManagement\Models;

use App\Traits\HasPublicIdentifier;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class WorkforceMetric extends Model
{
    use HasPublicIdentifier;

    protected $fillable = [
        'weekly_status_report_id',
        'active_workforce',
        'period_man_hours',
        'cumulative_man_hours',
        'logistics_km',
    ];

    protected function casts(): array
    {
        return [
            'period_man_hours' => 'decimal:2',
            'cumulative_man_hours' => 'decimal:2',
            'logistics_km' => 'decimal:2',
        ];
    }

    public function report(): BelongsTo
    {
        return $this->belongsTo(WeeklyStatusReport::class, 'weekly_status_report_id');
    }

    /**
     * Calculate cumulative man-hours from all previous approved reports + current period.
     */
    public static function calculateCumulative(int $projectId, string $periodStart, float $currentPeriodHours, ?int $excludeReportId = null): float
    {
        $query = self::whereHas('report', fn ($q) => $q
            ->where('project_id', $projectId)
            ->where('status', 'approved')
            ->where('period_end', '<', $periodStart)
        );

        if ($excludeReportId) {
            $query->where('weekly_status_report_id', '!=', $excludeReportId);
        }

        $previousTotal = $query->sum('period_man_hours');

        return (float) $previousTotal + $currentPeriodHours;
    }
}