import prisma from "../db";
import config from "../config.json";
import { CustomerType, PayCondition } from "@prisma/client";

if (!process.env.FLOW_ACCOUNT_URL) throw new Error("Require FLOW_ACCOUNT_URL");
if (!process.env.FLOW_ACCOUNT_CLIENT_ID) throw new Error("Require FLOW_ACCOUNT_CLIENT_ID");
if (!process.env.FLOW_ACCOUNT_CLIENT_SECRET) throw new Error("Require FLOW_ACCOUNT_CLIENT_SECRET");
if (!process.env.FLOW_ACCOUNT_CLIENT_GRANT_TYPE) {
  throw new Error("Require FLOW_ACCOUNT_CLIENT_GRANT_TYPE");
}
if (!process.env.FLOW_ACCOUNT_CLIENT_SCOPE) throw new Error("Require FLOW_ACCOUNT_CLIENT_SCOPE");

const api = process.env.FLOW_ACCOUNT_URL;
const clientId = process.env.FLOW_ACCOUNT_CLIENT_ID;
const clientSecret = process.env.FLOW_ACCOUNT_CLIENT_SECRET;
const clientGrantType = process.env.FLOW_ACCOUNT_CLIENT_GRANT_TYPE;
const clientScope = process.env.FLOW_ACCOUNT_CLIENT_SCOPE;

let token: string = "";
let tokenExpire: number = Date.now();

// float 0.0 - 1.0
const VAT_DEFAULT = config.vat;

enum ContactGroup {
  PERS = 1,
  CORP = 3,
}

enum CreditType {
  Cash = 3,
  CreditDay = 1,
  CreditNoLimit = 5,
}

enum DocumentDeductionType {
  Special = 1,
  Agent = 3,
  Process = 5,
  Round = 7,
}

enum SaleAndPurchaseChannel {
  Lazada = "Lazada",
  Shopee = "Shopee",
}

enum ProductAndServiceType {
  Service = 1,
  ProductNonInv = 3,
  ProductInv = 5,
}

enum PaymentDeductionType {
  SpecialDiscount = 1,
  Commission = 3,
  Process = 5,
  Round = 7,
}

type ProductAndService = {
  type?: ProductAndServiceType;
  name: string;
  description?: string;
  quantity: number;
  unitName?: string;
  pricePerUnit: number;
  total: number;
  discountAmount?: number;
  vatRate?: number;
  sellChartOfAccountCode?: string;
  buyChartOfAccountcode?: string;
};

const flowAccountAPI = {
  auth: async () => {
    // Get new token if it is expiring soon (30s).
    if (token && Date.now() < tokenExpire + 30 * 1000) return { token, tokenExpire };

    const payload = {
      ["client_id"]: clientId,
      ["client_secret"]: clientSecret,
      ["grant_type"]: clientGrantType,
      ["scope"]: clientScope,
    };

    const res = await fetch(api + "/token", {
      method: "POST",
      headers: {
        ["Content-Type"]: "application/x-www-form-urlencoded",
      },
      body: new URLSearchParams(payload),
    });

    if (!res.ok) throw new Error("Cannot connect to flowaccount: " + (await res.text()));

    const body: {
      access_token: string;
      expires_in: number;
    } = await res.json();

    token = body.access_token;
    tokenExpire = Date.now() + body.expires_in * 1000;

    return { token, tokenExpire };
  },

  async createReceipt(
    data: {
      recordId?: string;
      contactCode?: string;
      contactName: string;
      contactAddress: string;
      contactTaxId?: string;
      contactBranch?: string;
      contactPerson?: string;
      contactEmail?: string;
      contactNumber?: string;
      contactZipCode?: string;
      contactGroup?: ContactGroup;
      /** This must be in yyyy-MM-dd format if pass as string */
      publishedOn?: Date | string;
      creditType?: CreditType;
      /** This is integer */
      creditDays?: number;
      /** This must be in yyyy-MM-dd format if pass as string */
      dueDate?: Date | string;
      salesName?: string;
      projectName?: string;
      reference?: string;
      isVatInclusive: boolean;
      useReceiptDeduction?: boolean;
      subTotal: number;
      discounPercentage?: number;
      discountAmount?: number;
      totalAfterDiscount: number;
      isVat?: boolean;
      vatAmount?: number;
      /** VAT included */
      grandTotal?: number;
      /** แสดงหรือไม่แสดง หัก ณ ที่จ่ายท้ายเอกสาร */
      documentShowWithholdingTax?: boolean;
      /** ภาษีหัก ณ ที่จ่าย (%) */
      documentWithholdingTaxPercentage?: number;
      /** ภาษีหัก ณ ที่จ่าย */
      documentWithholdingTaxAmount?: number;
      documentDeductionType?: DocumentDeductionType;
      documentDeductionAmount?: number;
      remarks?: string;
      internalNotes?: string;
      showSignatureOrStamp?: boolean;
      documentStructureType?: "SimpleDocument" | null;
      saleAndPurchaseChannel?: SaleAndPurchaseChannel;
      items: ProductAndService[];
      /** This must be in yyyy-MM-dd format if pass as string */
      // paymentDate: Date | string;
      // paymentDeductionType?: PaymentDeductionType;
      // collected: number;
    },
    withPayment?: boolean,
  ) {
    const { token } = await flowAccountAPI.auth();

    if (data.publishedOn instanceof Date) {
      let date = data.publishedOn.getDate();
      let month = data.publishedOn.getMonth() + 1;
      let year = data.publishedOn.getFullYear();
      data.publishedOn = `${year}-${String(month).padStart(2, "0")}-${String(date).padStart(2, "0")}`;
    }

    if (data.dueDate instanceof Date) {
      let date = data.dueDate.getDate();
      let month = data.dueDate.getMonth() + 1;
      let year = data.dueDate.getFullYear();
      data.dueDate = `${year}-${String(month).padStart(2, "0")}-${String(date).padStart(2, "0")}`;
    }

    /* if (data.paymentDate instanceof Date) {
      let date = data.paymentDate.getDate();
      let month = data.paymentDate.getMonth() + 1;
      let year = data.paymentDate.getFullYear();
      data.paymentDate = `${year}-${String(month).padStart(2, "0")}-${String(date).padStart(2, "0")}`;
    } */

    const res = await fetch(
      api + "/upgrade/receipts/inline" + (withPayment ? "/with-payment" : ""),
      {
        method: "POST",
        headers: {
          ["Content-Type"]: `application/json`,
          ["Authorization"]: `Bearer ${token}`,
        },
        body: JSON.stringify({ ...data, referenceDocument: [] }),
      },
    );

    return {
      ok: res.ok,
      status: res.status,
      body: await res.json(),
    };
  },

  async getInvoiceDocument(recordId: string) {
    const { token } = await flowAccountAPI.auth();

    const res = await fetch(api + "/receipts/sharedocument", {
      method: "POST",
      headers: {
        ["Content-Type"]: `application/json`,
        ["Authorization"]: `Bearer ${token}`,
      },
      body: JSON.stringify({
        documentId: +recordId,
        culture: "th",
      }),
    });

    return {
      ok: res.ok,
      status: res.status,
      body: await res.json(),
    };
  },
};

const flowAccount = {
  issueInvoice: async (invoiceId: string) => {
    const data = await prisma.invoice.findFirst({
      where: { id: invoiceId },
      include: {
        installments: true,
        quotation: {
          include: {
            registeredBranch: {
              include: {
                province: true,
                district: true,
                subDistrict: true,
              },
            },
            productServiceList: {
              include: {
                worker: true,
                service: true,
                work: true,
                product: true,
              },
            },
            customerBranch: {
              include: { customer: true, province: true, district: true, subDistrict: true },
            },
            createdBy: true,
            updatedBy: true,
          },
        },
        payment: true,
      },
    });

    if (!data) return null;

    const quotation = data.quotation;
    const customer = quotation.customerBranch;
    const product =
      quotation.payCondition === PayCondition.BillFull ||
      quotation.payCondition === PayCondition.Full
        ? quotation.productServiceList
        : quotation.productServiceList.filter((lhs) =>
            data.installments.some((rhs) => rhs.no === lhs.installmentNo),
          );
    const payload = {
      contactCode: customer.code,
      contactName:
        (customer.customer.customerType === CustomerType.PERS
          ? [customer.firstName, customer.lastName].join(" ").trim()
          : customer.registerName) || "-",
      contactAddress: [
        customer.address,
        !!customer.moo ? "หมู่ " + customer.moo : null,
        !!customer.soi ? "ซอย " + customer.soi : null,
        !!customer.street ? "ถนน " + customer.street : null,
        (customer.province?.id === "10" ? "แขวง" : "อำเภอ") + customer.subDistrict?.name,
        (customer.province?.id === "10" ? "เขต" : "ตำบล") + customer.district?.name,
        "จังหวัด" + customer.province?.name,
        customer.subDistrict?.zipCode,
      ]
        .filter(Boolean)
        .join(" "),
      contactTaxId: customer.citizenId || customer.code,
      contactBranch:
        (customer.customer.customerType === CustomerType.PERS
          ? [customer.firstName, customer.lastName].join(" ").trim()
          : customer.registerName) || "-",
      contactPerson: customer.contactName ?? undefined,
      contactEmail: customer.email,
      contactNumber: customer.telephoneNo,
      contactZipCode: customer.subDistrict?.zipCode,
      contactGroup:
        customer.customer.customerType === "PERS" ? ContactGroup.PERS : ContactGroup.CORP,
      dueDate: quotation.dueDate,
      salesName: [quotation.createdBy?.firstName, quotation.createdBy?.lastName].join(" "),

      isVatInclusive: true,
      isVat: true,

      useReceiptDeduction: false,

      discounPercentage: 0,
      discountAmount: quotation.totalDiscount,

      subTotal:
        quotation.payCondition === "BillSplitCustom" || quotation.payCondition === "SplitCustom"
          ? 0
          : quotation.totalPrice,
      totalAfterDiscount:
        quotation.payCondition === "BillSplitCustom" || quotation.payCondition === "SplitCustom"
          ? 0
          : quotation.finalPrice,
      vatAmount:
        quotation.payCondition === "BillSplitCustom" || quotation.payCondition === "SplitCustom"
          ? 0
          : quotation.vat,
      grandTotal:
        quotation.payCondition === "BillSplitCustom" || quotation.payCondition === "SplitCustom"
          ? data.installments.reduce((a, c) => a + c.amount, 0)
          : quotation.finalPrice,

      items: product.map((v) => ({
        type: ProductAndServiceType.ProductNonInv,
        name: v.product.name,
        pricePerUnit: v.pricePerUnit,
        quantity: v.amount,
        discountAmount: v.discount,
        total: (v.pricePerUnit - (v.discount || 0)) * v.amount + v.vat,
        vatRate: v.vat === 0 ? 0 : Math.round(VAT_DEFAULT * 100),
      })),
    };

    return await flowAccountAPI.createReceipt(payload, false);
  },

  getInvoiceDocument: async (recordId: string) => {
    const ret = await flowAccountAPI.getInvoiceDocument(recordId);
    if (ret && ret.ok) {
      return ret.body;
    }
    return null;
  },
};

export default flowAccount;