<?php

namespace App\Models;

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

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',
        'status_perawatan',   // Tambahan Baru
        'remark_pasca_sakit'
    ];

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

    /* -------------------------------------------------------------------------- */
    /* RELASI                                    */
    /* -------------------------------------------------------------------------- */

    /**
     * Relasi ke Kucing.
     */
    public function cat(): BelongsTo
    {
        return $this->belongsTo(Cat::class)->withTrashed();
    }

    /**
     * Relasi utama ke User (PIC).
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    /**
     * Alias untuk relasi user (Digunakan di Dashboard).
     */
    public function pic(): BelongsTo
    {
        return $this->user();
    }

    /**
     * PENTING: Relasi ke Medicine tunggal (Legacy Support).
     * Ini yang memperbaiki error 'RelationNotFoundException' pada data lama.
     */
    public function medicine(): BelongsTo
    {
        return $this->belongsTo(Medicine::class);
    }

    /**
     * Relasi ke Detail Obat (Sistem Baru Multi-Medicine).
     */
    public function details(): HasMany
    {
        return $this->hasMany(TreatmentDetail::class);
    }

    /**
     * Relasi langsung ke banyak Medicine (Many-to-Many via pivot details).
     */
    public function medicines(): BelongsToMany
    {
        return $this->belongsToMany(Medicine::class, 'treatment_details')
                    ->withPivot('dosis', 'keterangan_pakai')
                    ->withTimestamps();
    }

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

    /**
     * Mengambil URL foto bukti. 
     */
    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);
    }

    /**
     * Menghitung Progres Pengobatan secara otomatis.
     * Cara pakai di Blade: {{ $treatment->status_progress }}
     */
    public function getStatusProgressAttribute(): string
    {
        $text = strtolower($this->diagnosa . ' ' . $this->keterangan);
        
        // Keyword indikator membaik
        $improvingKeywords = ['baik', 'makan', 'aktif', 'sembuh', 'lincah', 'normal', 'turun panas'];
        
        if (Str::contains($text, $improvingKeywords)) {
            return 'MEMBAIK';
        }

        return 'STUCK';
    }

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

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

    /**
     * Scope khusus untuk mengambil rekam medis yang sedang aktif (Under Treatment).
     */
    public function scopeActiveTreatment(Builder $query): Builder
    {
        return $query->whereHas('cat', function($q) {
            $q->where('treatment_status', 1);
        });
    }
}