using System;
using System.Collections.Generic;
using JD.Collections.Extensions;
using JD.Kernel.Structs;
using JetBrains.Annotations;

namespace JD.LogService
{
    public static class LoggerExtensions
    {
        [StringFormatMethod("message")]
        public static void LogError(this ILogger logger, string message, params object[] args)
        {
            logger.LogError(FileLocation.Empty, message, args);
        }

        [StringFormatMethod("message")]
        public static void LogError(this ILogger logger, FileLocation origin, string message, params object[] args)
        {
            logger.LogError(LogCategory.Error, origin, message, args);
        }

        [StringFormatMethod("message")]
        public static void LogWarning(this ILogger logger, string message, params object[] args)
        {
            logger.LogWarning(FileLocation.Empty, message, args);
        }

        [StringFormatMethod("message")]
        public static void LogWarning(this ILogger logger, FileLocation origin, string message, params object[] args)
        {
            logger.LogError(LogCategory.Warning, origin, message, args);
        }

        [StringFormatMethod("message")]
        private static void LogError(this ILogger logger, LogCategory category, FileLocation origin, string message, params object[] args)
        {
            logger.Log(new Error(category, message, args) { Origin = origin });
        }

        [StringFormatMethod("message")]
        public static void LogMessage(this ILogger logger, string message, params object[] args)
        {
            logger.Log(new Message(message, args));
        }

        [StringFormatMethod("message")]
        public static void LogMessage(this ILogger logger, FileLocation origin, string message, params object[] args)
        {
            logger.Log(new Message(message, args) { Origin = origin });
        }

        [StringFormatMethod("message")]
        public static void LogMessage(this ILogger logger, FileLocation origin, MessageImportance importance, string message, params object[] args)
        {
            logger.Log(new Message(message, args)
            {
                Origin = origin, 
                Importance = importance
            });
        }

        [StringFormatMethod("message")]
        public static void LogMessage(this ILogger logger, MessageImportance importance, string message, params object[] args)
        {
            logger.Log(new Message(message, args) { Importance = importance });
        }

        [StringFormatMethod("message")]
        public static void LogException(this ILogger logger, Exception ex, string message, params object[] args)
        {
            logger.Log(Error.FromException(ex, message, args));

            var allExceptions = new List<Exception>();
            while (ex != null)
            {
                allExceptions.Add(ex);
                ex = ex.InnerException;
            }

            var fullDetails = allExceptions.Join($"{Environment.NewLine}->", e => $"{e.Message} {e.StackTrace}");
            logger.LogMessage(MessageImportance.Debug, fullDetails);
        }

        /// <summary>
        /// Returns a logger that prefills the file location with the provided one 
        /// if the logged error does not provide one.
        /// </summary>
        public static ILogger OfFileLocation(this ILogger logger, FileLocation fileLocation)
        {
            return Logger.FromAction(logEvent =>
            {
                if (Equals(logEvent.Origin, FileLocation.Empty))
                {
                    logEvent.Origin = fileLocation;
                }

                logger.Log(logEvent);
            });
        }
    }
}