using Microsoft.EntityFrameworkCore;
using Npgsql;
using StellaOps.Findings.Ledger.EfCore.CompiledModels;
using StellaOps.Findings.Ledger.EfCore.Context;

namespace StellaOps.Findings.Ledger.Infrastructure.Postgres;

internal static class FindingsLedgerDbContextFactory
{
    public const string DefaultSchemaName = "findings";

    public static FindingsLedgerDbContext Create(NpgsqlConnection connection, int commandTimeoutSeconds, string schemaName)
    {
        var normalizedSchema = string.IsNullOrWhiteSpace(schemaName)
            ? DefaultSchemaName
            : schemaName.Trim();

        var optionsBuilder = new DbContextOptionsBuilder<FindingsLedgerDbContext>()
            .UseNpgsql(connection, npgsql => npgsql.CommandTimeout(commandTimeoutSeconds));

        if (string.Equals(normalizedSchema, DefaultSchemaName, StringComparison.Ordinal))
        {
            // Use the static compiled model when schema mapping matches the default model.
            // Guard: only apply if compiled model has entity types registered.
            try
            {
                var compiledModel = FindingsLedgerDbContextModel.Instance;
                if (compiledModel.GetEntityTypes().Any())
                {
                    optionsBuilder.UseModel(compiledModel);
                }
            }
            catch
            {
                // Fall back to reflection model if compiled model is not fully initialized.
            }
        }

        return new FindingsLedgerDbContext(optionsBuilder.Options, normalizedSchema);
    }
}