<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\Storage;

class Treatment extends Model
{
    /**
     * Kolom yang boleh diisi secara mass-assignment.
     */
    protected $fillable = [
        'cat_id',
        'user_id',
        'tanggal',
        'keluhan',
        'diagnosa',
        'nama_obat',
        'dosis',
        'keterangan',
        'foto_bukti',
        'medicine_id',
        'qty_used',
    ];

    /**
     * Casting data agar formatnya sesuai (Tanggal jadi object Carbon).
     */
    protected $casts = [
        'tanggal'  => 'datetime',
        'qty_used' => 'decimal:2',
    ];

    /* -------------------------------------------------------------------------- */
    /* RELASI (MENGATASI ERROR RELATION NOT FOUND)                                */
    /* -------------------------------------------------------------------------- */

    /**
     * Relasi ke Kucing.
     */
    public function cat(): BelongsTo
    {
        return $this->belongsTo(Cat::class, 'cat_id')->withDefault([
            'nama_kucing' => 'Kucing Terhapus'
        ]);
    }

    /**
     * Relasi utama ke User (PIC). 
     * Nama fungsi 'user' wajib ada karena dipanggil di TreatmentController baris 31.
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class, 'user_id')->withDefault([
            'name' => 'System / Admin'
        ]);
    }

    /**
     * Alias untuk relasi user. 
     * Nama fungsi 'pic' wajib ada karena dipanggil di DashboardController.
     */
    public function pic(): BelongsTo
    {
        return $this->user();
    }

    /**
     * Relasi ke Inventori Obat.
     */
    public function medicine(): BelongsTo
    {
        return $this->belongsTo(Medicine::class, 'medicine_id')->withDefault([
            'nama_obat' => $this->nama_obat ?? 'Obat Manual'
        ]);
    }

    /* -------------------------------------------------------------------------- */
    /* ACCESSORS                                                                  */
    /* -------------------------------------------------------------------------- */

    /**
     * Mengambil URL foto bukti. 
     * Cara akses di Blade: {{ $treatment->foto_url }}
     */
    public function getFotoUrlAttribute(): string
    {
        if (!$this->foto_bukti) {
            return 'https://ui-avatars.com/api/?name=No+Image&background=f1f5f9&color=cbd5e1';
        }

        return Storage::url($this->foto_bukti);
    }

    /* -------------------------------------------------------------------------- */
    /* SCOPES                                                                     */
    /* -------------------------------------------------------------------------- */

    /**
     * Scope untuk mengurutkan data terbaru.
     */
    public function scopeLatestFirst(Builder $query): void
    {
        $query->orderBy('tanggal', 'desc');
    }
}