using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using PlayFab;
using UnityEditor;
using UnityEngine;

namespace asap.playfab.editor
{
    public class AsyncCodeGen
    {
        private static string OutputDir = "LocalPackages/asap.playfab.async/Runtime/Gen";
        private static string ClassTemp =
@"
#if {3}
using System.Threading.Tasks;
using PlayFab;
using UnityEngine;
{0}

namespace asap.playfab.async
{{
    //generated file, do not modify
    public static partial class {1}
    {{
{2}
    }}
}}
#endif
";

        private static string MehtodTemp =
@"
        public static Task<{3}> {1}Async({2} request)
        {{
            var task = new TaskCompletionSource<{3}>();
            {0}.{1}(request,
                result =>
                {{
                    task.SetResult(result);
                }},
                error =>
                {{
                    Debug.LogError(error.GenerateErrorReport());
                    task.SetResult(null);
                }});
            return task.Task;
        }}
";
        [MenuItem(@"asap/PlayFab/Generate Async Client API")]
        static async void GenerateClientAsyncAPIs()
        {
            var apiType = typeof(PlayFabClientAPI);
            var usings = "using PlayFab.ClientModels;";
            var asyncAPIName = "PlayFabClientAsyncAPI";
            var macro = "!DISABLE_PLAYFABCLIENT_API && !DISABLE_PLAYFAB_STATIC_API";
            if (!Directory.Exists(OutputDir))
            {
                Directory.CreateDirectory(OutputDir);
            }
            await GenerateAsyncAPI(apiType, usings, asyncAPIName, macro);
            AssetDatabase.Refresh();
        }


#if ENABLE_PLAYFABSERVER_API && !DISABLE_PLAYFAB_STATIC_API
        [MenuItem(@"asap/PlayFab/Generate Async Server API")]
        static async void GenerateServerAsyncAPIs()
        {
            var apiType = typeof(PlayFabServerAPI);
            var usings = "using PlayFab.ServerModels;";
            var asyncAPIName = "PlayFabServerAsyncAPI";
            var macro = "ENABLE_PLAYFABSERVER_API && !DISABLE_PLAYFAB_STATIC_API";
            await GenerateAsyncAPI(apiType, usings, asyncAPIName, macro);
            AssetDatabase.Refresh();
        }
#endif

#if ENABLE_PLAYFABADMIN_API && !DISABLE_PLAYFAB_STATIC_API
        [MenuItem(@"asap/PlayFab/Generate Async Admin API")]
        static async void GenerateAdminAsyncAPIs()
        {
            var apiType = typeof(PlayFabAdminAPI);
            var usings = "using PlayFab.AdminModels;";
            var asyncAPIName = "PlayFabAdminAsyncAPI";
            var macro = "ENABLE_PLAYFABADMIN_API && !DISABLE_PLAYFAB_STATIC_API";
            await GenerateAsyncAPI(apiType, usings, asyncAPIName, macro);
            AssetDatabase.Refresh();
        }
#endif

#if !DISABLE_PLAYFABENTITY_API && !DISABLE_PLAYFAB_STATIC_API
        [MenuItem(@"asap/PlayFab/Generate Async Data API")]
        static async void GenerateDataAsyncAPIs()
        {
            var apiType = typeof(PlayFabDataAPI);
            var usings = "using PlayFab.DataModels;";
            var asyncAPIName = "PlayFabDataAsyncAPI";
            var macro = "!DISABLE_PLAYFABENTITY_API && !DISABLE_PLAYFAB_STATIC_API";
            await GenerateAsyncAPI(apiType, usings, asyncAPIName, macro);
            AssetDatabase.Refresh();
        }
#endif
#if !DISABLE_PLAYFABENTITY_API && !DISABLE_PLAYFAB_STATIC_API
        [MenuItem(@"asap/PlayFab/Generate Async Profiles API")]
        static async void GenerateProfilesAsyncAPIs()
        {
            var apiType = typeof(PlayFabProfilesAPI);
            var usings = "using PlayFab.ProfilesModels;";
            var asyncAPIName = "PlayFabProfilesAsyncAPI";
            var macro = "!DISABLE_PLAYFABENTITY_API && !DISABLE_PLAYFAB_STATIC_API";
            if (!Directory.Exists(OutputDir))
            {
                Directory.CreateDirectory(OutputDir);
            }
            await GenerateAsyncAPI(apiType, usings, asyncAPIName, macro);
            AssetDatabase.Refresh();
        }
#endif

        private static async Task GenerateAsyncAPI(Type apiType, string usings, string asyncAPIName, string macro)
        {
            StringBuilder sb = new StringBuilder();

            var typeName = apiType.Name;
            var methodInfos = apiType.GetMethods();
            for (int i = 0; i < methodInfos.Length; i++)
            {
                var methodInfo = methodInfos[i];
                var obsoleteAttributes = methodInfo.GetCustomAttributes(typeof(ObsoleteAttribute), false);
                if (obsoleteAttributes != null && obsoleteAttributes.Length > 0)
                    continue;
                if (methodInfo.IsGenericMethod)
                    continue;
                var parameterInfos = methodInfo.GetParameters();
                if (parameterInfos.Length != 5)
                    continue;

                var inputType = parameterInfos[0].ParameterType;
                var outputType = parameterInfos[1].ParameterType.GenericTypeArguments[0];
                sb.AppendFormat(MehtodTemp, typeName, methodInfo.Name, inputType.Name, outputType.Name);
                // sb.AppendLine();
            }

            StringBuilder classSB = new StringBuilder();
            classSB.AppendFormat(ClassTemp, usings, asyncAPIName, sb.ToString(), macro);

            var outputPath = Path.Combine(OutputDir, asyncAPIName + ".cs");
            // var fs = new FileStream(outputPath, FileMode.OpenOrCreate);
            var sw = new StreamWriter(outputPath);
            await sw.WriteAsync(classSB.ToString());
            await sw.FlushAsync();
            sw.Close();
        }
    }
}