<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    public function up(): void
    {
        Schema::create('searches', function (Blueprint $table): void {
            $table->bigIncrements('id');
            $table->decimal('lat_bucket', 5, 2)->comment('Latitude rounded to 2dp (~1km precision) for privacy');
            $table->decimal('lng_bucket', 5, 2)->comment('Longitude rounded to 2dp for privacy');
            $table->string('fuel_type', 20);
            $table->unsignedSmallInteger('results_count');
            $table->unsignedSmallInteger('lowest_pence')->nullable()->comment('Cheapest price found in pence × 100');
            $table->unsignedSmallInteger('highest_pence')->nullable()->comment('Most expensive price found in pence × 100');
            $table->decimal('avg_pence', 8, 2)->nullable()->comment('Mean price across results in pence × 100');
            $table->dateTime('searched_at');
            $table->string('ip_hash', 64)->comment('SHA-256 of requester IP — non-reversible, for unique count only');

            $table->index(['searched_at', 'fuel_type']);
            $table->index('ip_hash');
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('searches');
    }
};
