using System;
using System.IO;
using Microsoft.Data.Sqlite;

Console.WriteLine("=== DATABASE VERIFICATION ===\n");

var dbPath = Path.Combine("..", "LittleShop", "littleshop-dev.db");
using var conn = new SqliteConnection($"Data Source={dbPath}");
conn.Open();

// Check Products table for new columns
Console.WriteLine("✓ PRODUCTS TABLE:");
using var cmd1 = conn.CreateCommand();
cmd1.CommandText = "PRAGMA table_info(Products)";
using var reader1 = cmd1.ExecuteReader();
var foundVariantCollectionId = false;
var foundVariantsJson = false;
while (reader1.Read())
{
    var colName = reader1.GetString(1);
    if (colName == "VariantCollectionId") foundVariantCollectionId = true;
    if (colName == "VariantsJson") foundVariantsJson = true;
}
Console.WriteLine($"  - VariantCollectionId column: {(foundVariantCollectionId ? "✅ EXISTS" : "❌ MISSING")}");
Console.WriteLine($"  - VariantsJson column: {(foundVariantsJson ? "✅ EXISTS" : "❌ MISSING")}");

// Check VariantCollections table exists
Console.WriteLine("\n✓ VARIANT COLLECTIONS TABLE:");
using var cmd2 = conn.CreateCommand();
cmd2.CommandText = "SELECT COUNT(*) FROM VariantCollections";
try
{
    var count = Convert.ToInt32(cmd2.ExecuteScalar());
    Console.WriteLine($"  - Table exists: ✅ YES");
    Console.WriteLine($"  - Record count: {count}");
}
catch
{
    Console.WriteLine("  - Table exists: ❌ NO");
}

// Check SalesLedgers table exists
Console.WriteLine("\n✓ SALES LEDGERS TABLE:");
using var cmd3 = conn.CreateCommand();
cmd3.CommandText = "SELECT COUNT(*) FROM SalesLedgers";
try
{
    var count = Convert.ToInt32(cmd3.ExecuteScalar());
    Console.WriteLine($"  - Table exists: ✅ YES");
    Console.WriteLine($"  - Record count: {count}");
}
catch
{
    Console.WriteLine("  - Table exists: ❌ NO");
}

// Check Products with data
Console.WriteLine("\n✓ PRODUCTS DATA:");
using var cmd4 = conn.CreateCommand();
cmd4.CommandText = "SELECT COUNT(*), COUNT(VariantCollectionId), COUNT(VariantsJson) FROM Products";
using var reader4 = cmd4.ExecuteReader();
if (reader4.Read())
{
    Console.WriteLine($"  - Total products: {reader4.GetInt32(0)}");
    Console.WriteLine($"  - With VariantCollectionId: {reader4.GetInt32(1)}");
    Console.WriteLine($"  - With VariantsJson: {reader4.GetInt32(2)}");
}

// Check OrderItems for SelectedVariants
Console.WriteLine("\n✓ ORDER ITEMS TABLE:");
using var cmd5 = conn.CreateCommand();
cmd5.CommandText = "PRAGMA table_info(OrderItems)";
using var reader5 = cmd5.ExecuteReader();
var foundSelectedVariants = false;
while (reader5.Read())
{
    if (reader5.GetString(1) == "SelectedVariants") foundSelectedVariants = true;
}
Console.WriteLine($"  - SelectedVariants column: {(foundSelectedVariants ? "✅ EXISTS" : "❌ MISSING")}");

Console.WriteLine("\n✅ DATABASE VERIFICATION COMPLETE!\n");
conn.Close();