using System;
using System.IO;
using System.Text;
using Newtonsoft.Json;
using SyncEngine.Configuration;

namespace SyncEngine.MySql
{
    /// <summary>Appends failed shop_sync_log API posts to logs/shop-sync-log-failed-YYYYMMDD.jsonl.</summary>
    public static class ShopSyncLogLocalWriter
    {
        private static Func<string> LogDirectoryProvider =
            () => Path.Combine(EnvSettings.ExeDirectory(), "logs");

        internal static void SetLogDirectoryProviderForTests(Func<string> provider)
        {
            LogDirectoryProvider = provider ?? (() => Path.Combine(EnvSettings.ExeDirectory(), "logs"));
        }

        internal static void ResetLogDirectoryProviderForTests()
        {
            LogDirectoryProvider = () => Path.Combine(EnvSettings.ExeDirectory(), "logs");
        }

        /// <returns>Path to the file the record was appended to.</returns>
        public static string WriteFailedApiPost(ShopSyncLogEntry entry, Exception mysqlEx, Exception apiEx)
        {
            var logDir = LogDirectoryProvider();
            Directory.CreateDirectory(logDir);
            var path = Path.Combine(logDir, "shop-sync-log-failed-" + DateTime.UtcNow.ToString("yyyyMMdd") + ".jsonl");
            var record = new
            {
                logged_at = DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ss"),
                mysql_error = mysqlEx != null ? mysqlEx.Message : null,
                api_error = apiEx != null ? apiEx.Message : null,
                payload = ShopSyncLogApiClient.BuildPayload(entry)
            };
            File.AppendAllText(path, JsonConvert.SerializeObject(record) + Environment.NewLine, Encoding.UTF8);
            return path;
        }
    }
}