<?php

namespace App\Models\Tenants;

use App\Models\Members\User;
use App\Traits\Auditable;
use App\Traits\BelongsToTenant;
use App\Traits\ModelTrait;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasOne;
use Illuminate\Database\Eloquent\SoftDeletes;

/**
 * 급여 모델
 *
 * @property int $id
 * @property int $tenant_id
 * @property int $employee_id
 * @property int $year
 * @property int $month
 * @property float $base_salary
 * @property float $total_allowance
 * @property float $total_overtime
 * @property float $total_bonus
 * @property float $total_deduction
 * @property float $net_payment
 * @property array|null $allowance_details
 * @property array|null $deduction_details
 * @property string|null $payment_date
 * @property string $status
 * @property int|null $created_by
 * @property int|null $updated_by
 * @property int|null $deleted_by
 */
class Salary extends Model
{
    use Auditable, BelongsToTenant, ModelTrait, SoftDeletes;

    protected $table = 'salaries';

    protected $fillable = [
        'tenant_id',
        'employee_id',
        'year',
        'month',
        'base_salary',
        'total_allowance',
        'total_overtime',
        'total_bonus',
        'total_deduction',
        'net_payment',
        'allowance_details',
        'deduction_details',
        'payment_date',
        'status',
        'created_by',
        'updated_by',
        'deleted_by',
    ];

    protected $casts = [
        'base_salary' => 'decimal:2',
        'total_allowance' => 'decimal:2',
        'total_overtime' => 'decimal:2',
        'total_bonus' => 'decimal:2',
        'total_deduction' => 'decimal:2',
        'net_payment' => 'decimal:2',
        'allowance_details' => 'array',
        'deduction_details' => 'array',
        'payment_date' => 'date',
    ];

    protected $attributes = [
        'status' => 'scheduled',
        'base_salary' => 0,
        'total_allowance' => 0,
        'total_overtime' => 0,
        'total_bonus' => 0,
        'total_deduction' => 0,
        'net_payment' => 0,
    ];

    // =========================================================================
    // 관계 정의
    // =========================================================================

    /**
     * 직원
     */
    public function employee(): BelongsTo
    {
        return $this->belongsTo(User::class, 'employee_id');
    }

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

    /**
     * 수정자
     */
    public function updater(): BelongsTo
    {
        return $this->belongsTo(User::class, 'updated_by');
    }

    /**
     * 직원 프로필 (테넌트별)
     * 주의: eager loading 시 constrain 필요
     * ->with(['employeeProfile' => fn($q) => $q->where('tenant_id', $tenantId)])
     */
    public function employeeProfile(): HasOne
    {
        return $this->hasOne(TenantUserProfile::class, 'user_id', 'employee_id');
    }

    // =========================================================================
    // 헬퍼 메서드
    // =========================================================================

    /**
     * 지급 완료 여부
     */
    public function isCompleted(): bool
    {
        return $this->status === 'completed';
    }

    /**
     * 지급 예정 여부
     */
    public function isScheduled(): bool
    {
        return $this->status === 'scheduled';
    }

    /**
     * 상태 변경
     */
    public function markAsCompleted(): void
    {
        $this->status = 'completed';
    }

    /**
     * 상태 변경
     */
    public function markAsScheduled(): void
    {
        $this->status = 'scheduled';
    }

    /**
     * 실지급액 계산
     */
    public function calculateNetPayment(): float
    {
        return $this->base_salary
            + $this->total_allowance
            + $this->total_overtime
            + $this->total_bonus
            - $this->total_deduction;
    }

    /**
     * 년월 표시
     */
    public function getPeriodLabel(): string
    {
        return sprintf('%d년 %d월', $this->year, $this->month);
    }
}