using ErsatzTV.Infrastructure;
using ErsatzTV.Infrastructure.Data;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;
using Microsoft.Extensions.Logging.Abstractions;

namespace ErsatzTV;

public class TvContextDesignTimeFactory : IDesignTimeDbContextFactory<TvContext>
{
    public TvContext CreateDbContext(string[] args)
    {
        string provider = GetProvider(args);

        var optionsBuilder = new DbContextOptionsBuilder<TvContext>();
        if (provider.Equals("MySql", StringComparison.OrdinalIgnoreCase))
        {
            TvContext.IsSqlite = false;
            TvContext.LastInsertedRowId = "last_insert_id()";
            TvContext.CaseInsensitiveCollation = "utf8mb4_general_ci";
            string connectionString =
                Environment.GetEnvironmentVariable("MySql__ConnectionString") ??
                "Server=localhost;Database=ersatztv_design_time;User=root;Password=ersatztv;";
            optionsBuilder.UseMySql(
                connectionString,
                new MySqlServerVersion(new Version(8, 0, 36)),
                builder => builder.MigrationsAssembly("ErsatzTV.Infrastructure.MySql"));
        }
        else
        {
            TvContext.IsSqlite = true;
            TvContext.LastInsertedRowId = "last_insert_rowid()";
            TvContext.CaseInsensitiveCollation = "NOCASE";
            string configFolder = Environment.GetEnvironmentVariable("ETV_CONFIG_FOLDER");
            string databasePath = string.IsNullOrWhiteSpace(configFolder)
                ? Path.Combine(Path.GetTempPath(), "ersatztv-design-time.sqlite3")
                : Path.Combine(configFolder, "ersatztv.sqlite3");
            optionsBuilder.UseSqlite(
                $"Data Source={databasePath}",
                builder => builder.MigrationsAssembly("ErsatzTV.Infrastructure.Sqlite"));
        }

        return new TvContext(
            optionsBuilder.Options,
            NullLoggerFactory.Instance,
            new SlowQueryInterceptor(NullLogger<SlowQueryInterceptor>.Instance));
    }

    private static string GetProvider(string[] args)
    {
        for (int index = 0; index < args.Length - 1; index++)
        {
            if (args[index].Equals("--provider", StringComparison.OrdinalIgnoreCase))
            {
                return args[index + 1];
            }
        }

        return "Sqlite";
    }
}