<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;

class Technician extends Model
{
    /** @use HasFactory<\Database\Factories\TechnicianFactory> */
    use HasFactory;

    protected $fillable = [
        'first_name',
        'last_name',
        'email',
        'phone',
        'employee_id',
        'hourly_rate',
        'specializations',
        'skill_level',
        'certifications',
        'status',
        'shift_start',
        'shift_end',
    ];

    protected $casts = [
        'hourly_rate' => 'decimal:2',
        'specializations' => 'array',
        'shift_start' => 'datetime:H:i',
        'shift_end' => 'datetime:H:i',
    ];

    protected $attributes = [
        'specializations' => '[]',
        'status' => 'active',
        'skill_level' => 'apprentice',
    ];

    // Existing relationships
    public function serviceOrders(): HasMany
    {
        return $this->hasMany(ServiceOrder::class, 'assigned_technician_id');
    }

    public function appointments(): HasMany
    {
        return $this->hasMany(Appointment::class, 'assigned_technician_id');
    }

    public function inspections(): HasMany
    {
        return $this->hasMany(VehicleInspection::class, 'technician_id');
    }

    // New relationships for technician management
    public function skills(): HasMany
    {
        return $this->hasMany(TechnicianSkill::class);
    }

    public function performances(): HasMany
    {
        return $this->hasMany(TechnicianPerformance::class);
    }

    public function workloads(): HasMany
    {
        return $this->hasMany(TechnicianWorkload::class);
    }

    public function primarySkills(): HasMany
    {
        return $this->skills()->where('is_primary_skill', true);
    }

    public function currentWorkload()
    {
        return $this->workloads()->whereDate('workload_date', now()->toDateString())->first();
    }

    public function getFullNameAttribute(): string
    {
        return "{$this->first_name} {$this->last_name}";
    }

    public function isAvailable(): bool
    {
        return $this->status === 'active';
    }

    // New helper methods for technician management
    public function getAverageRating(): float
    {
        return $this->performances()
            ->where('metric_type', 'customer_rating')
            ->avg('metric_value') ?? 0;
    }

    public function getTotalJobsCompleted(): int
    {
        return $this->performances()
            ->where('metric_type', 'jobs_completed')
            ->sum('metric_value') ?? 0;
    }

    public function getCurrentUtilizationRate(): float
    {
        $workload = $this->currentWorkload();
        return $workload ? $workload->utilization_rate : 0;
    }

    public function getSkillLevel(string $skillName): int
    {
        $skill = $this->skills()->where('skill_name', $skillName)->first();
        return $skill ? $skill->proficiency_level : 0;
    }

    public function hasSkill(string $skillName, int $minimumLevel = 1): bool
    {
        return $this->getSkillLevel($skillName) >= $minimumLevel;
    }

    public function getWorkloadForPeriod($startDate, $endDate)
    {
        return $this->workloads()
            ->whereBetween('workload_date', [$startDate, $endDate])
            ->orderBy('workload_date')
            ->get();
    }

    public function getPerformanceMetric(string $metricType, $startDate = null, $endDate = null)
    {
        $query = $this->performances()->where('metric_type', $metricType);
        
        if ($startDate && $endDate) {
            $query->whereBetween('performance_date', [$startDate, $endDate]);
        }
        
        return $query->avg('metric_value') ?? 0;
    }
}