<?php

namespace App\Model;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use App\Library\Traits\HasUid;

/**
 * @property int $id
 * @property string $uid
 * @property int $ad_campaign_id
 * @property string $status
 * @property int|null $winner_variant_id
 * @property float $confidence
 * @property string|null $isolated_variable
 * @property float $confidence_threshold
 * @property array<string,mixed>|null $settings
 * @property \Carbon\Carbon|null $started_at
 * @property \Carbon\Carbon|null $completed_at
 * @property-read AdCampaign|null $campaign
 */
class AdAbTest extends Model
{
    use HasFactory;
    use HasUid;

    const STATUS_DRAFT = 'draft';
    const STATUS_RUNNING = 'running';
    const STATUS_COMPLETED = 'completed';
    const STATUS_CANCELLED = 'cancelled';
    const STATUS_ACTIVE = 'running'; // alias for HasUid trait compatibility

    const STATUSES = [self::STATUS_DRAFT, self::STATUS_RUNNING, self::STATUS_COMPLETED, self::STATUS_CANCELLED];

    protected $table = 'ad_ab_tests';

    protected $fillable = ['uid', 'ad_campaign_id', 'status', 'winner_variant_id', 'confidence', 'isolated_variable', 'confidence_threshold', 'settings', 'started_at', 'completed_at'];

    protected $casts = [
        'settings' => 'json',
        'confidence' => 'decimal:2',
        'confidence_threshold' => 'decimal:2',
        'started_at' => 'datetime',
        'completed_at' => 'datetime',
    ];

    /**
     * @return BelongsTo<AdCampaign, $this>
     */
    public function campaign(): BelongsTo
    {
        return $this->belongsTo(AdCampaign::class, 'ad_campaign_id');
    }

    /**
     * @return HasMany<AdAbVariant, $this>
     */
    public function variants(): HasMany
    {
        return $this->hasMany(AdAbVariant::class, 'ad_ab_test_id');
    }

    /**
     * @return HasMany<AdAbTestEvaluationLog, $this>
     */
    public function evaluationLogs(): HasMany
    {
        return $this->hasMany(AdAbTestEvaluationLog::class, 'ad_ab_test_id');
    }

    public function winner(): BelongsTo
    {
        return $this->belongsTo(AdAbVariant::class, 'winner_variant_id');
    }

    public function scopeOfCampaign($query, $campaignId) { return $query->where('ad_campaign_id', $campaignId); }

    public function scopeOfCustomer($query, $customerId)
    {
        return $query->whereIn('ad_campaign_id', function ($q) use ($customerId) {
            $q->select('id')->from('ad_campaigns')->where('customer_id', $customerId);
        });
    }

    public function scopeSearch($query, $keyword)
    {
        if (!$keyword) return $query;
        return $query->whereIn('ad_campaign_id', function ($q) use ($keyword) {
            $q->select('id')->from('ad_campaigns')->where('name', 'like', '%' . $keyword . '%');
        });
    }

    public function getStatusBadgeAttribute(): string
    {
        return match ($this->status) {
            self::STATUS_RUNNING => 'blue',
            self::STATUS_COMPLETED => 'green',
            self::STATUS_CANCELLED => 'red',
            default => 'orange',
        };
    }

    protected static function newFactory()
    {
        return \Database\Factories\AdAbTestFactory::new();
    }
}