using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;
using Kurs.Platform.DynamicData;
using Kurs.Platform.Entities;
using Kurs.Platform.Extensions;
using Kurs.Platform.Queries;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Volo.Abp.Domain.Repositories;
using Volo.Abp.Tracing;
using Volo.Abp.Uow;

namespace Kurs.Platform.CustomEndpoints;

[Authorize]
[Route("api/app/custom-endpoint")]
public class CustomEndpointAppService : PlatformAppService
{
    private readonly IRepository<CustomEndpoint, Guid> repo;
    private readonly IHttpContextAccessor httpContextAccessor;
    private readonly IDataSourceManager dataSourceManager;
    private readonly IDynamicDataManager dynamicDataManager;
    private readonly DefaultValueHelper defaultValueHelper;

    public CustomEndpointAppService(
        IRepository<CustomEndpoint, Guid> repo,
        IHttpContextAccessor httpContextAccessor,
        IDataSourceManager dataSourceManager,
        IDynamicDataManager dynamicDataManager,
        DefaultValueHelper defaultValueHelper)
    {
        this.repo = repo;
        this.httpContextAccessor = httpContextAccessor;
        this.dataSourceManager = dataSourceManager;
        this.dynamicDataManager = dynamicDataManager;
        this.defaultValueHelper = defaultValueHelper;
    }

    [HttpGet("{**path}")]
    [Authorize(PlatformConsts.AppCodes.CustomEndpoints.Get)]
    public async Task<IActionResult> GetAsync()
    {
        return await Execute("GET");
    }

    [HttpPost("{**path}")]
    [Authorize(PlatformConsts.AppCodes.CustomEndpoints.Post)]
    public async Task<IActionResult> PostAsync()
    {
        return await Execute("POST");
    }

    private async Task<IActionResult> Execute(string method)
    {
        using var uow = UnitOfWorkManager.Begin(new AbpUnitOfWorkOptions(false), true);

        try
        {
            // Request.Path = /api/app/custom-endpoint/yxcdfn/8
            var rawPath = httpContextAccessor.HttpContext.Request.Path.ToString();
            var decodedPath = Uri.UnescapeDataString(rawPath); // URL decode işlemi

            var path = decodedPath
                            .Replace("/api/app/custom-endpoint", "", StringComparison.OrdinalIgnoreCase)
                            .EnsureStartsWith('/')
                            .EnsureEndsWith('/');

            Logger.LogInformation("Custom Endpoint çağrısı. Kullanıcı:{user} Path:[{method}]{path}", CurrentUser.UserName, "GET", path);
            var api = await repo.FirstOrDefaultAsync(a => path.StartsWith(a.Url) && a.Method == method);
            if (api is null)
            {
                Logger.LogInformation("Custom Endpoint bulunamadı");
                return new NotFoundResult();
            }
            Logger.LogInformation("Custom Endpoint bulundu. {api}", api.Name);

            var canUse = api.Permissions.Any(a =>
             (a.ResourceType == "User" && a.ResourceId == CurrentUser.UserName) ||
             (a.ResourceType == "Role" && CurrentUser.Roles.Contains(a.ResourceId)) ||
             (a.ResourceType == "Global"));
            if (!canUse)
            {
                Logger.LogWarning("Custom Endpoint yetki yok");
                return new UnauthorizedResult();
            }


            Dictionary<string, object> param = [];
            // Parametreler:
            // 1- Statik
            foreach (var item in api.Parameters.Where(a => a.Type == PlatformConsts.CustomEndpointConsts.ParameterTypes.Static))
            {
                var value = defaultValueHelper.GetDefaultValue(item.DefaultValue);
                param.Add(item.Name, value);
            }

            // 2- Query
            var queryParams = httpContextAccessor.HttpContext.Request.Query;
            foreach (var item in api.Parameters.Where(a => a.Type == PlatformConsts.CustomEndpointConsts.ParameterTypes.Query))
            {
                if (queryParams.TryGetValue(item.Name, out var value))
                {
                    param.Add(item.Name, value);
                }
                else
                {
                    if (item.IsRequired)
                    {
                        throw new Volo.Abp.UserFriendlyException(L[PlatformConsts.AppErrorCodes.ParameterNotValid, item.Name]);
                    }
                    else
                    {
                        param.Add(item.Name, defaultValueHelper.GetDefaultValue(item.DefaultValue));
                    }
                }
            }

            // 3- Path
            foreach (var item in api.Parameters.Where(a => a.Type == PlatformConsts.CustomEndpointConsts.ParameterTypes.Path && !a.Path.IsNullOrWhiteSpace()))
            {
                var itemPath = item.Path.EnsureStartsWith('/').EnsureEndsWith('/');
                var index = itemPath.IndexOf($"/:{item.Name}/");
                if (index == -1)
                {
                    throw new Volo.Abp.UserFriendlyException(L[PlatformConsts.AppErrorCodes.ParameterNotValid, item.Name]);
                }
                var segmentCount = itemPath[..(index + 1)].Count(a => a == '/');
                var value = path.GetSegment('/', segmentCount);
                param.Add(item.Name, value ?? defaultValueHelper.GetDefaultValue(item.DefaultValue));
            }

            // 4- Body
            if (method == "POST")
            {
                var body = await httpContextAccessor.HttpContext.Request.ReadFormAsync();
                foreach (var item in api.Parameters.Where(a => a.Type == PlatformConsts.CustomEndpointConsts.ParameterTypes.Body))
                {
                    if (body.TryGetValue(item.Name, out var value))
                    {
                        param.Add(item.Name, value);
                    }
                    else
                    {
                        if (item.IsRequired)
                        {
                            throw new Volo.Abp.UserFriendlyException(L[PlatformConsts.AppErrorCodes.ParameterNotValid, item.Name]);
                        }
                        else
                        {
                            param.Add(item.Name, defaultValueHelper.GetDefaultValue(item.DefaultValue));
                        }
                    }
                }
            }

            Logger.LogInformation("Parametreler: {param}", param);

            var (dynamicDataRepository, connectionString, _) = await dynamicDataManager.GetAsync(api.DataSourceCode == "!Tenant", api.DataSourceCode);
            var result = await dynamicDataRepository.QueryAsync(api.Sql, connectionString, param);

            Logger.LogInformation("Sonuç başarılı");
            Logger.LogInformation("{result}", result);

            await uow.CompleteAsync();

            return new ObjectResult(result);
        }
        catch (Volo.Abp.UserFriendlyException ex)
        {
            Logger.LogException(ex);
            await uow.RollbackAsync();
            return new JsonResult(new
            {
                Message = ex.Message,
                CorrelationId = LazyServiceProvider.GetRequiredService<ICorrelationIdProvider>().Get(),
            })
            {
                StatusCode = 500,
            };
        }
        catch (Exception ex)
        {
            Logger.LogException(ex);
            await uow.RollbackAsync();
            return new JsonResult(new
            {
                Message = L[PlatformConsts.AppErrorCodes.InternalError].Value,
                CorrelationId = LazyServiceProvider.GetRequiredService<ICorrelationIdProvider>().Get()
            })
            {
                StatusCode = 500,
            };
        }
    }
}

//TODO: Custom Endpoint rol, permission seed
/*
Token İsteği Örnek:
POST /connect/token HTTP/1.1
Host: localhost:44344
Content-Type: application/x-www-form-urlencoded

username=system%40sozsoft.com
&password=...
&grant_type=password
&client_id=Platform_PublicApi
&scope=offline_access%20Platform

Custom Endpoint Seed:
SELECT * FROM PLanguage WHERE IsEnabled = @IsEnabled AND CultureName = @CultureName
INSERT INTO [dbo].[Orders]
           ([CustomerName]
           ,[ProductName]
           ,[OrderDate]
           ,[Quantity])
     OUTPUT Inserted.*
     VALUES
           (@CustomerName, @ProductName, @OrderDate, @Quantity)
           SELECT * FROM Orders WHERE Id = SCOPE_IDENTITY()
[{ "Type": "S", "Name": "CultureName", "DefaultValue": "ar" }]

[{ "Type": "Q", "Name": "CultureName", "DefaultValue": "ar" }]

[
    { "Type": "P", "Name": "IsEnabled", "DefaultValue": "en", "Path": "/yxcdfn/8/:IsEnabled/:CultureName/" },
    { "Type": "P", "Name": "CultureName", "DefaultValue": "en", "Path": "/yxcdfn/8/:IsEnabled/:CultureName/" }
]

[
    { "Type": "B", "Name": "CustomerName", "DefaultValue": "" },
    { "Type": "B", "Name": "ProductName", "DefaultValue": "" },
    { "Type": "B", "Name": "OrderDate", "DefaultValue": "@NOW" },
    { "Type": "B", "Name": "Quantity", "DefaultValue": "" }
]


Guid? TenantId
string Name
string Description
string Url -> https://api.sozsoft.com/api/app/dinamik/yxfgu
string Method -> GET
string Params = [
    { Type: 'Static', Name: 'StartDate', DefaultValue: '234' },
    { Type: 'Query', Name: 'StartDate', DefaultValue: '', IsRequired: false },
    { Type: 'Path', Name: 'FaturaId', DefaultValue: '', Path: '/yxfgu/fatura/:FaturaId/kalem/357' },
    { Type: 'Path', Name: 'KalemId', DefaultValue: '', Path: '/yxfgu/fatura/xxx/kalem/:KalemId' },
    { Type: 'Body', Name: 'StartDate', DefaultValue: '' },
]
string Sql -> SELECT * FROM VSatislar WHERE MusteriId = @MusteriId AND StartDate >= @StartDate
string Permissions = [
    { ResourceType: 'User', ResourceId: 'system' },
    { ResourceType: 'User', ResourceId: 'sedat' },
]

Query Parameter
URL: https://api.sozsoft.com/api/app/dinamik/yxfgu
Method: GET
Parameters: ?StartDate=2024-12-31&EndDate=2025-12-31

Path Parameter
URL: https://api.sozsoft.com/api/app/dinamik/yxfgu/fatura/467/kalem/357
Method: GET
Parameters: FaturaId=467

Body Parameter
URL: https://api.sozsoft.com/api/app/dinamik/yxfgu?UrunId=5
Method: POST
Parameters: ?StartDate=2024-12-31&EndDate=2025-12-31
Body: { Tutar: 2000, Tarih: '2024-12-31' }

*/