update retribution calculation spatial plannings

app/Models/SpatialPlanning.php

@@ -3,6 +3,8 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 /**
  * Class SpatialPlanning
@@ -31,7 +33,69 @@ class SpatialPlanning extends Model
      *
      * @var array<int, string>
      */
-    protected $fillable = ['name', 'kbli', 'activities', 'area', 'location', 'number', 'date'];
+    protected $fillable = ['name', 'kbli', 'activities', 'area', 'location', 'number', 'date', 'no_tapak', 'no_skkl', 'no_ukl', 'building_function', 'sub_building_function', 'number_of_floors', 'land_area', 'site_bcr'];
 
+    protected $casts = [
+        'area' => 'decimal:6',
+        'land_area' => 'decimal:6',
+        'site_bcr' => 'decimal:6',
+        'number_of_floors' => 'integer',
+        'date' => 'date'
+    ];
 
+    /**
+     * Retribution calculation relationship (1:1)
+     */
+    public function retributionCalculation(): HasOne
+    {
+        return $this->hasOne(RetributionCalculation::class);
+    }
+
+    /**
+     * Building function relationship (if building_function becomes FK in future)
+     */
+    public function buildingFunctionRelation(): BelongsTo
+    {
+        return $this->belongsTo(BuildingFunction::class, 'building_function_id');
+    }
+
+    /**
+     * Check if spatial planning has retribution calculation
+     */
+    public function hasRetributionCalculation(): bool
+    {
+        return $this->retributionCalculation()->exists();
+    }
+
+    /**
+     * Get building function text for detection
+     */
+    public function getBuildingFunctionText(): string
+    {
+        return $this->building_function ?? $this->activities ?? '';
+    }
+
+    /**
+     * Get area for calculation (prioritize area, fallback to land_area)
+     */
+    public function getCalculationArea(): float
+    {
+        return (float) ($this->area ?? $this->land_area ?? 0);
+    }
+
+    /**
+     * Scope: Without retribution calculation
+     */
+    public function scopeWithoutRetributionCalculation($query)
+    {
+        return $query->whereDoesntHave('retributionCalculation');
+    }
+
+    /**
+     * Scope: With retribution calculation
+     */
+    public function scopeWithRetributionCalculation($query)
+    {
+        return $query->whereHas('retributionCalculation');
+    }
 }