<?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('transfers', function (Blueprint $table) {
            $table->id();
            $table->foreignId('user_id')->constrained()->cascadeOnDelete();
            $table->foreignId('qr_code_id')->nullable()->constrained('qr_codes')->nullOnDelete();
            $table->string('title');
            $table->text('message')->nullable();
            $table->string('password_hash')->nullable();
            $table->unsignedSmallInteger('retention_days')->default(30);
            $table->timestamp('expires_at')->nullable();
            $table->string('status', 20)->default('active');
            $table->unsignedBigInteger('downloads_total')->default(0);
            $table->unsignedBigInteger('storage_bytes')->default(0);
            $table->timestamps();

            $table->index(['user_id', 'status', 'created_at']);
            $table->index(['expires_at', 'status']);
        });

        Schema::create('transfer_files', function (Blueprint $table) {
            $table->id();
            $table->foreignId('transfer_id')->constrained()->cascadeOnDelete();
            $table->string('original_name');
            $table->string('disk', 32)->default('qr');
            $table->string('path');
            $table->string('mime_type', 128);
            $table->unsignedBigInteger('size_bytes')->default(0);
            $table->unsignedBigInteger('downloads_total')->default(0);
            $table->timestamps();

            $table->index(['transfer_id', 'created_at']);
        });

        Schema::create('transfer_download_events', function (Blueprint $table) {
            $table->id();
            $table->foreignId('transfer_id')->constrained()->cascadeOnDelete();
            $table->foreignId('transfer_file_id')->nullable()->constrained('transfer_files')->nullOnDelete();
            $table->timestamp('downloaded_at');
            $table->string('ip_hash', 64)->nullable();
            $table->text('user_agent')->nullable();
            $table->timestamps();

            $table->index(['transfer_id', 'downloaded_at']);
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('transfer_download_events');
        Schema::dropIfExists('transfer_files');
        Schema::dropIfExists('transfers');
    }
};