<?php

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

return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::create('user_interactions', function (Blueprint $table) {
            $table->id();
            $table->foreignId('user_id')->nullable()->constrained()->onDelete('cascade'); // nullable for guest tracking
            $table->string('session_id')->nullable(); // for guest users
            $table->foreignId('item_id')->constrained()->onDelete('cascade');
            $table->enum('interaction_type', ['view', 'click', 'watchlist_add', 'message', 'buy_interest']);
            $table->json('metadata')->nullable(); // Additional context (referrer, time spent, etc.)
            $table->timestamp('created_at');
            
            $table->index(['user_id', 'interaction_type']);
            $table->index(['session_id', 'interaction_type']);
            $table->index(['item_id', 'interaction_type']);
            $table->index('created_at');
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('user_interactions');
    }
};