using Azure.Core;
using CPRNIMS.Domain.Services;
using CPRNIMS.Domain.UIContracts.Common;
using CPRNIMS.Domain.UIContracts.Inventory;
using CPRNIMS.Infrastructure.Dto.Common;
using CPRNIMS.Infrastructure.Dto.Inventory;
using CPRNIMS.Infrastructure.Dto.Inventory.Request;
using CPRNIMS.Infrastructure.Dto.Inventory.Response;
using CPRNIMS.Infrastructure.Helper;
using Microsoft.Extensions.Configuration;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

namespace CPRNIMS.Domain.UIServices.Inventory
{
    public class MRS : IMRS
    {
        private readonly IConfiguration _configuration;
        private readonly TokenHelper _tokenHelper;
        private readonly IApiConfigurationService _apiConfigurationService;
        public MRS(IConfiguration configuration, TokenHelper tokenHelper,IApiConfigurationService apiConfigurationService)      
        {
            _configuration = configuration;
            _tokenHelper = tokenHelper;
            _apiConfigurationService = apiConfigurationService;
        }
        private static readonly JsonSerializerOptions _mrsJsonOpts = new()
        {
            PropertyNameCaseInsensitive = true
        };

        public async Task<MRSPagedResponse> GetMRSPaged(MRSPagedRequest request, CancellationToken ct)
        {
            var token = await _tokenHelper.GetValidTokenAsync();
            if (string.IsNullOrEmpty(token))
                throw new InvalidOperationException("Token has been expired.");

            var baseEndpoint = _configuration["LLI:NonInvent:InventoryMgmt:GetMRS"]
                ?? throw new InvalidOperationException("GetMRS endpoint is not configured.");

            var qs = new StringBuilder(baseEndpoint).Append('?');
            qs.Append($"pageNumber={request.PageNumber}&pageSize={request.PageSize}");

            if (!string.IsNullOrWhiteSpace(request.SearchMRSNo))
                qs.Append($"&searchMRSNo={Uri.EscapeDataString(request.SearchMRSNo)}");
            if (!string.IsNullOrWhiteSpace(request.SearchRISNo))
                qs.Append($"&searchRISNo={Uri.EscapeDataString(request.SearchRISNo)}");
            if (!string.IsNullOrWhiteSpace(request.SearchItemName))
                qs.Append($"&searchItemName={Uri.EscapeDataString(request.SearchItemName)}");
            if (!string.IsNullOrWhiteSpace(request.SearchReturnedBy))
                qs.Append($"&searchReturnedBy={Uri.EscapeDataString(request.SearchReturnedBy)}");
            if (request.Status.HasValue)
                qs.Append($"&status={request.Status.Value}");
            if (!string.IsNullOrWhiteSpace(request.Condition))
                qs.Append($"&condition={Uri.EscapeDataString(request.Condition)}");

            using var http = _apiConfigurationService.CreateHttpClientWithDefaultHeaders(token);
            var response = await http.GetAsync(qs.ToString(), ct);
            var json = await response.Content.ReadAsStringAsync(ct);

            if (!response.IsSuccessStatusCode)
                return new MRSPagedResponse { Data = [], RecordsTotal = 0 };

            var result = JsonSerializer.Deserialize<MRSPagedResponse>(json, _mrsJsonOpts);
            return result ?? new MRSPagedResponse();
        }

        public async Task<ApiResponse<object>> CreateMRS(CreateMRSRequest request, CancellationToken ct)
        {
            var token = await _tokenHelper.GetValidTokenAsync();
            if (string.IsNullOrEmpty(token))
                throw new InvalidOperationException("Token has been expired.");

            var endpoint = _configuration["LLI:NonInvent:InventoryMgmt:CreateMRS"]
                ?? throw new InvalidOperationException("CreateMRS endpoint is not configured.");

            using var http = _apiConfigurationService.CreateHttpClientWithDefaultHeaders(token);
            using var content = new StringContent(JsonSerializer.Serialize(request), Encoding.UTF8, "application/json");

            var response = await http.PostAsync(endpoint, content, ct);
            var json = await response.Content.ReadAsStringAsync(ct);

            var result = JsonSerializer.Deserialize<ApiResponse<object>>(json, _mrsJsonOpts)
                ?? new ApiResponse<object> { success = false, message = $"HTTP {(int)response.StatusCode}" };

            if (!response.IsSuccessStatusCode)
                result.success = false;

            return result;
        }

        public async Task<ApiResponse<object>> ApproveMRS(ApproveMRSRequest request, CancellationToken ct)
        {
            var token = await _tokenHelper.GetValidTokenAsync();
            if (string.IsNullOrEmpty(token))
                throw new InvalidOperationException("Token has been expired.");

            var endpoint = _configuration["LLI:NonInvent:InventoryMgmt:ApproveMRS"]
                ?? throw new InvalidOperationException("ApproveMRS endpoint is not configured.");

            using var http = _apiConfigurationService.CreateHttpClientWithDefaultHeaders(token);
            using var content = new StringContent(
                JsonSerializer.Serialize(request),
                Encoding.UTF8, "application/json");

            var response = await http.PostAsync(endpoint, content, ct);
            var json = await response.Content.ReadAsStringAsync(ct);
            var result = JsonSerializer.Deserialize<ApiResponse<object>>(json, _mrsJsonOpts)
             ?? new ApiResponse<object> { success = false, message = $"HTTP {(int)response.StatusCode}" };

            if (!response.IsSuccessStatusCode)
                result.success = false;

            return result;
        }

        public async Task<ApiResponse<object>> CancelMRS(CancelMRSRequest request, CancellationToken ct)
        {
            var token = await _tokenHelper.GetValidTokenAsync();
            if (string.IsNullOrEmpty(token))
                throw new InvalidOperationException("Token has been expired.");

            var endpoint = _configuration["LLI:NonInvent:InventoryMgmt:CancelMRS"]
                ?? throw new InvalidOperationException("CancelMRS endpoint is not configured.");

            using var http = _apiConfigurationService.CreateHttpClientWithDefaultHeaders(token);
            using var content = new StringContent(
                JsonSerializer.Serialize(request),
                Encoding.UTF8, "application/json");

            var response = await http.PostAsync(endpoint, content, ct);
            var json = await response.Content.ReadAsStringAsync(ct);
            var result = JsonSerializer.Deserialize<ApiResponse<object>>(json, _mrsJsonOpts)
             ?? new ApiResponse<object> { success = false, message = $"HTTP {(int)response.StatusCode}" };

            if (!response.IsSuccessStatusCode)
                result.success = false;

            return result;
        }

        public async Task<ApiResponse<List<SearchRISProjectCodeResponse>>> SearchRIS(SearchRISProjectCodeRequest request, CancellationToken ct)
        {
            var token = await _tokenHelper.GetValidTokenAsync();
            if (string.IsNullOrEmpty(token))
                throw new InvalidOperationException("Token has been expired.");

            var baseEndpoint = _configuration["LLI:NonInvent:InventoryMgmt:SearchRIS"]
                ?? throw new InvalidOperationException("GetMRS endpoint is not configured.");

            var qs = new StringBuilder(baseEndpoint).Append('?');

            if (!string.IsNullOrWhiteSpace(request.SearchRISNo))
                qs.Append($"&searchRISNo={Uri.EscapeDataString(request.SearchRISNo)}");
            if (!string.IsNullOrWhiteSpace(request.SearchRISNo))
                qs.Append($"&projectCodeId= {request.SearchProjectCodeId}");

            using var http = _apiConfigurationService.CreateHttpClientWithDefaultHeaders(token);
            var response = await http.GetAsync(qs.ToString(), ct);
            var json = await response.Content.ReadAsStringAsync(ct);

            if (!response.IsSuccessStatusCode)
                return new ApiResponse<List<SearchRISProjectCodeResponse>>{ };

            var result = JsonSerializer.Deserialize<ApiResponse<List<SearchRISProjectCodeResponse>>>(json, _mrsJsonOpts);
            return result ?? new ApiResponse<List<SearchRISProjectCodeResponse>>();
        }

        public async Task<ApiResponse<List<ProjectCodeOptionResponse>>> SearchProjects(SearchRISProjectCodeRequest request, CancellationToken ct)
        {
            var token = await _tokenHelper.GetValidTokenAsync();
            if (string.IsNullOrEmpty(token))
                throw new InvalidOperationException("Token has expired.");

            var baseEndpoint = _configuration["LLI:NonInvent:InventoryMgmt:SearchProjects"]
                ?? throw new InvalidOperationException("SearchProjects endpoint is not configured.");

            var qs = new StringBuilder(baseEndpoint);
            if (!string.IsNullOrWhiteSpace(request.SearchProjectCode))
                qs.Append('?').Append("searchProjectCode=").Append(Uri.EscapeDataString(request.SearchProjectCode));

            using var http = _apiConfigurationService.CreateHttpClientWithDefaultHeaders(token);
            var response = await http.GetAsync(qs.ToString(), ct);
            var json = await response.Content.ReadAsStringAsync(ct);

            if (!response.IsSuccessStatusCode)
                return new ApiResponse<List<ProjectCodeOptionResponse>>();

            var result = JsonSerializer.Deserialize<ApiResponse<List<ProjectCodeOptionResponse>>>(json, _mrsJsonOpts);
            return result ?? new ApiResponse<List<ProjectCodeOptionResponse>>();
        }
    }
}