using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Threading.Tasks;
using Complyance.SDK;
using Complyance.SDK.Exceptions;
using Complyance.SDK.Models;
using Xunit;
using Environment = Complyance.SDK.Models.Environment;

namespace Complyance.SDK.TestProject
{
    public class UAETaxInvoiceTest
    {
        private static readonly JsonSerializerOptions JsonOptions = new JsonSerializerOptions
        {
            WriteIndented = true
        };

        private const string DefaultApiKey = "ak_dfc7321146db8cfcf9cb35c539fa";
        private const string SourceName = "A";
        private const string SourceVersion = "1";
        private static readonly Environment SdkEnvironment = Environment.Sandbox;
        private static readonly Country TestCountry = Country.AE;

        static UAETaxInvoiceTest()
        {
            var sources = new List<Source>
            {
                new Source(SourceName, SourceVersion, SourceType.FirstParty)
            };

            var apiKey = System.Environment.GetEnvironmentVariable("COMPLYANCE_API_KEY");
            if (string.IsNullOrWhiteSpace(apiKey))
            {
                apiKey = DefaultApiKey;
            }

            var config = new SDKConfig(apiKey, SdkEnvironment, sources);
            GETSUnifySDK.Configure(config);
        }

        [Fact]
        public async Task TestUAETaxInvoiceFlow()
        {
            var payload = CreateUAETestPayload();

            var documentType = GetsDocumentType.NewBuilder()
                .Base(BASE.TAX_INVOICE)
                .Build();

            Console.WriteLine("=== UAE Tax Invoice Flow ===");
            Console.WriteLine($"URL: {SdkEnvironment.GetBaseUrl()}");
            Console.WriteLine("REQUEST:");
            Console.WriteLine(JsonSerializer.Serialize(payload, JsonOptions));

            UnifyResponse response;
            try
            {
                response = await GETSUnifySDK.PushToUnifyAsync(
                    SourceName,
                    SourceVersion,
                    documentType,
                    TestCountry,
                    Operation.Single,
                    Mode.Documents,
                    Purpose.Invoicing,
                    payload);
            }
            catch (SDKException e)
            {
                var message = FirstNonEmpty(e.Message, e.ErrorDetail?.Message, "UAE flow failed");
                Console.Error.WriteLine($"❌ UAE Tax Invoice Flow failed: {message}");
                if (e.ErrorDetail != null)
                {
                    Console.Error.WriteLine($"   Error Code: {e.ErrorDetail.Code}");
                    Console.Error.WriteLine($"   Message:    {FirstNonEmpty(e.ErrorDetail.Message, message)}");
                    if (!string.IsNullOrWhiteSpace(e.ErrorDetail.Suggestion))
                    {
                        Console.Error.WriteLine($"   Suggestion: {e.ErrorDetail.Suggestion}");
                    }
                }
                throw;
            }

            Assert.NotNull(response);
            Assert.NotNull(response.Status);
            Console.WriteLine("RESPONSE:");
            Console.WriteLine(JsonSerializer.Serialize(response, JsonOptions));

            if ("error".Equals(response.Status, StringComparison.OrdinalIgnoreCase))
            {
                var errorCode = response.Error?.Code.ToString() ?? "UNKNOWN";
                var message = FirstNonEmpty(response.Error?.Message, response.Message, "UAE flow failed");
                var suggestion = response.Error?.Suggestion;

                Console.Error.WriteLine($"❌ UAE Tax Invoice Flow failed: {message}");
                Console.Error.WriteLine($"   Status:     {FirstNonEmpty(response.Status, "unknown")}");
                Console.Error.WriteLine($"   Error Code: {errorCode}");
                Console.Error.WriteLine($"   Message:    {message}");
                Console.Error.WriteLine($"   Response Message: {FirstNonEmpty(response.Message, "(empty)")}");
                if (!string.IsNullOrWhiteSpace(suggestion))
                {
                    Console.Error.WriteLine($"   Suggestion: {suggestion}");
                }

                throw new SDKException(message);
            }

            Console.WriteLine($"✅ Status: {response.Status}");
        }

        private static string FirstNonEmpty(params string?[] values)
        {
            foreach (var value in values)
            {
                if (!string.IsNullOrWhiteSpace(value))
                {
                    return value;
                }
            }
            return string.Empty;
        }

        private static Dictionary<string, object> CreateUAETestPayload()
        {
            var documentId = "b1c2d3e4-f567-8901-2345-67890abcdef1";

            var payload = new Dictionary<string, object>();

            var invoiceData = new Dictionary<string, object>
            {
                ["document_number"] = "shubham-36",
                ["reference_id"] = "20260202104801557",
                ["document_id"] = documentId,
                ["document_type"] = "tax_invoice",
                ["invoice_date"] = "2026-03-26",
                ["invoice_time"] = "00:00:00Z",
                ["currency_code"] = "AED",
                ["tax_currency_code"] = "AED",
                ["due_date"] = "2026-04-26",
                ["period_start_date"] = "2026-02-25",
                ["period_end_date"] = "2026-03-27",
                ["period_frequency"] = "MONTHLY",
                ["exchange_rate"] = 1.0,
                ["line_extension_amount"] = 5000,
                ["tax_exclusive_amount"] = 5000,
                ["total_tax_amount"] = 0,
                ["total_amount"] = 5000,
                ["total_allowances"] = 0,
                ["total_charges"] = 0,
                ["prepaid_amount"] = 0,
                ["amount_due"] = 5000,
                ["rounding_amount"] = 0,
                ["original_reference_id"] = "UAE-INV-ORIG-001",
                ["credit_note_reason"] = "VD"
            };
            payload["invoice_data"] = invoiceData;

            var sellerInfo = new Dictionary<string, object>
            {
                ["seller_name"] = "ABC Trading LLC",
                ["seller_trade_name"] = "ABC Trading",
                ["seller_party_id"] = "SELLER-UAE-001",
                ["vat_number_type"] = "TRN",
                ["vat_number"] = "100819867100003",
                ["tax_scheme"] = "VAT",
                ["registration_number"] = "CN-1234567",
                ["registration_type"] = "TL",
                ["registration_scheme"] = "AE:TL",
                ["authority_name"] = "Dubai Department of Economic Development",
                ["peppol_id"] = "0235:1101560970",
                ["seller_email"] = "contact@abctrading.ae",
                ["seller_phone"] = "+971-4-1234567",
                ["seller_contact_name"] = "Ahmed Al Maktoum",
                ["street_name"] = "Sheikh Zayed Road",
                ["additional_address"] = "Building 123",
                ["building_number"] = "123",
                ["city_name"] = "Dubai",
                ["state_province"] = "DUBAI",
                ["postal_code"] = "00000",
                ["country_code"] = "AE"
            };
            payload["seller_info"] = sellerInfo;

            var buyerInfo = new Dictionary<string, object>
            {
                ["buyer_name"] = "XYZ Corporation LLC",
                ["buyer_trade_name"] = "XYZ Corp",
                ["buyer_party_id"] = "BUYER-UAE-001",
                ["buyer_vat_type"] = "TRN",
                ["buyer_vat_number"] = "100889867100003",
                ["buyer_tax_scheme"] = "VAT",
                ["buyer_registration_number"] = "CN-9876543",
                ["buyer_registration_type"] = "TL",
                ["buyer_registration_scheme"] = "TL",
                ["buyer_authority_name"] = "Abu Dhabi Department of Economic Development",
                ["buyer_peppol_id"] = "0235:1101560970",
                ["buyer_email"] = "purchasing@xyzcorp.ae",
                ["buyer_phone"] = "+971-2-9876543",
                ["buyer_contact_name"] = "Fatima Al Mansouri",
                ["buyer_street_name"] = "Al Wasl Road",
                ["buyer_additional_address"] = "Tower 2",
                ["buyer_building_number"] = "456",
                ["buyer_city"] = "Dubai",
                ["buyer_state_province"] = "DUBAI",
                ["buyer_postal_code"] = "00000",
                ["buyer_country"] = "AE"
            };
            payload["buyer_info"] = buyerInfo;

            var lineItems = new List<Dictionary<string, object>>
            {
                new Dictionary<string, object>
                {
                    ["line_id"] = "1",
                    ["item_name"] = "Office Equipment",
                    ["item_description"] = "Professional office equipment package",
                    ["quantity"] = 10,
                    ["unit_code"] = "EA",
                    ["unit_price"] = 500,
                    ["net_price"] = 500,
                    ["gross_price"] = 500,
                    ["line_taxable_value"] = 5000,
                    ["tax_category"] = "Z",
                    ["tax_rate"] = 0,
                    ["tax_amount"] = 0,
                    ["line_total"] = 5000,
                    ["item_type"] = "GOODS",
                    ["country_of_origin"] = "AE",
                    ["classification_code"] = "8471",
                    ["classification_scheme"] = "HS",
                    ["seller_item_code"] = "SKU-001",
                    ["buyer_item_code"] = "BUYER-SKU-001",
                    ["batch_number"] = "BATCH-2024-001"
                }
            };
            payload["line_items"] = lineItems;

            var taxTotals = new List<Dictionary<string, object>>
            {
                new Dictionary<string, object>
                {
                    ["tax_amount"] = 0,
                    ["taxable_amount"] = 5000,
                    ["tax_category_code"] = "Z",
                    ["tax_rate"] = 5
                }
            };
            payload["tax_totals"] = taxTotals;

            var deliveryInfo = new Dictionary<string, object>
            {
                ["deliver_to_address_line1"] = "Sheikh Zayed Road",
                ["deliver_to_city"] = "Dubai",
                ["deliver_to_country_subdivision"] = "DUBAI",
                ["deliver_to_country_code"] = "AE"
            };
            payload["delivery_info"] = deliveryInfo;

            var uaeExtensions = new Dictionary<string, object>
            {
                ["unique_identifier"] = documentId,
                ["invoiced_object_id"] = "OBJECT-2024-001",
                ["taxpoint_date"] = "2026-03-27",
                ["total_amount_including_tax_in_aed"] = 5000,
                ["authority_name"] = "Dubai Department of Economic Development",
                ["buyer_authority_name"] = "Abu Dhabi Department of Economic Development",
                ["business_process_type"] = "urn:peppol:bis:billing",
                ["specification_identifier"] = "urn:peppol:pint:ae:invoice:v1",
                ["beneficiary_id"] = "100889867100003",
                ["principal_id"] = "PRINCIPAL-001"
            };
            payload["uae_extensions"] = uaeExtensions;

            var paymentInfo = new Dictionary<string, object>
            {
                ["payment_id"] = "PAY-001",
                ["payment_means_code"] = "IN_CASH",
                ["payment_means_text"] = "Bank Transfer",
                ["remittance_info"] = "Payment for Invoice UAE-DBT-20260327123000000",
                ["account_id"] = "AE123456789012345678901",
                ["account_name"] = "ABC Trading LLC",
                ["bank_id"] = "AEBN0001"
            };
            payload["payment_info"] = paymentInfo;

            var paymentTerms = new List<Dictionary<string, object>>
            {
                new Dictionary<string, object>
                {
                    ["instructions_id"] = "TERMS-001",
                    ["note"] = "Net 30 days",
                    ["amount"] = 5000,
                    ["due_date"] = "2026-04-26"
                }
            };
            payload["payment_terms"] = paymentTerms;

            var supportingDocuments = new List<Dictionary<string, object>>
            {
                new Dictionary<string, object>
                {
                    ["custom_reference_number"] = "1234565432"
                }
            };
            payload["supporting_documents"] = supportingDocuments;

            return payload;
        }
    }
}