"use server";

import docusign from "docusign-esign";
import fs from "fs";
import path from "path";
import jwtConfig from "./jwtConfig/jwtConfig.json";
import dayjs from "dayjs";
import { ContractInfo, ContractorInfo } from "./types";

const SCOPES = ["signature", "impersonation"];

//DocuSign 인증 정보
async function authenticate(): Promise<
  | undefined
  | {
      accessToken: string;
      apiAccountId: string;
      basePath: string;
    }
> {
  const jwtLifeSec = 10 * 60;
  const dsApi = new docusign.ApiClient();
  dsApi.setOAuthBasePath(jwtConfig.dsOauthServer.replace("https://", ""));
  const privateKeyPath = path.resolve(
    process.cwd(),
    jwtConfig.privateKeyLocation
  );

  let rsaKey: Buffer = fs.readFileSync(privateKeyPath);

  try {
    const results = await dsApi.requestJWTUserToken(
      jwtConfig.dsJWTClientId,
      jwtConfig.impersonatedUserGuid,
      SCOPES,
      rsaKey,
      jwtLifeSec
    );
    const accessToken = results.body.access_token;

    const userInfoResults = await dsApi.getUserInfo(accessToken);
    let userInfo = userInfoResults.accounts.find(
      (account: Partial<{ isDefault: string }>) => account.isDefault === "true"
    );

    return {
      accessToken: results.body.access_token,
      apiAccountId: userInfo.accountId,
      basePath: `${userInfo.baseUri}/restapi`,
    };
  } catch (e) {
    console.error("❌ 인증 실패:", e);
  }
}

async function getSignerId(
  basePath: string,
  accountId: string,
  accessToken: string,
  envelopeId: string,
  roleName: string
): Promise<string | null> {
  const apiClient = new docusign.ApiClient();
  apiClient.setBasePath(basePath);
  apiClient.addDefaultHeader("Authorization", "Bearer " + accessToken);

  const envelopesApi = new docusign.EnvelopesApi(apiClient);

  try {
    const recipients = await envelopesApi.listRecipients(accountId, envelopeId);

    const singers = recipients?.signers ?? [];

    // 🔹 특정 서명자(Role Name 기준)의 Recipient ID 찾기
    const signer = singers.find((s) => s.roleName === roleName);
    if (!signer) {
      console.error("❌ 해당 Role Name을 가진 서명자를 찾을 수 없습니다.");
      return null;
    }

    return signer.recipientId as string;
  } catch (error) {
    console.error("❌ 서명자 ID 조회 실패:", error);
    return null;
  }
}

//계약서 서명 요청
export async function requestContractSign(
  contractTemplateId: string,
  contractInfo: ContractInfo[],
  subcontractorinfo: ContractorInfo,
  contractorInfo: ContractorInfo,
  ccInfo: ContractorInfo[],
  brandId: string | undefined = undefined
): Promise<
  Partial<{
    result: boolean;
    envelopeId: string;
    error: any;
  }>
> {
  let accountInfo = await authenticate();
  if (accountInfo) {
    const { accessToken, basePath, apiAccountId } = accountInfo;
    const {
      email: subEmail,
      name: subConName,
      roleName: subRoleName,
    } = subcontractorinfo;

    const {
      email: conEmail,
      name: conName,
      roleName: roleName,
    } = contractorInfo;

    const apiClient = new docusign.ApiClient();
    apiClient.setBasePath(basePath);
    apiClient.addDefaultHeader("Authorization", "Bearer " + accessToken);
    const envelopesApi = new docusign.EnvelopesApi(apiClient);

    const signer1: docusign.TemplateRole = {
      email: subEmail,
      name: subConName,
      roleName: subRoleName,
    };

    const signer1Tabs: docusign.Tabs = {
      textTabs: [
        ...contractInfo.map((c): docusign.Text => {
          const textField: docusign.Text = {
            tabLabel: c.tabLabel,
            value: c.value,
            locked: "true",
          };
          return textField;
        }),
      ],
    };

    const signer2: docusign.TemplateRole = {
      email: conEmail,
      name: conName,
      roleName: roleName,
    };

    const signer2Tabs: docusign.Tabs = {
      dateSignedTabs: [
        {
          tabLabel: "contract_complete_date",
        },
      ],
    };

    signer1.tabs = signer1Tabs;
    signer2.tabs = signer2Tabs;

    const envelopeDefinition: docusign.EnvelopeDefinition = {
      templateId: contractTemplateId,
      templateRoles: [signer1, signer2, ...ccInfo], // 두 명의 서명자 추가
      status: "sent", // 즉시 발송
    };

    if (brandId) {
      envelopeDefinition.brandId = brandId;
    }

    try {
      let envelopeSummary = await envelopesApi.createEnvelope(apiAccountId, {
        envelopeDefinition,
      });

      // console.log("✅ 서명 요청 완료, Envelope ID:", envelopeSummary);
      return {
        result: true,
        envelopeId: envelopeSummary.envelopeId,
      };
    } catch (error) {
      console.dir(error);
      return {
        result: false,
        error,
      };
    }
  } else {
    return {
      result: false,
    };
  }
}

//서명된 계약서 다운로드
export async function downloadContractFile(envelopeId: string): Promise<
  Partial<{
    result: boolean;
    fileName: string;
    buffer: Buffer;
    envelopeId: string;
    error: any;
  }>
> {
  let accountInfo = await authenticate();

  if (accountInfo) {
    const { accessToken, apiAccountId, basePath } = accountInfo;

    const apiClient = new docusign.ApiClient();
    apiClient.setBasePath(basePath);
    apiClient.addDefaultHeader("Authorization", "Bearer " + accessToken);

    const envelopesApi = new docusign.EnvelopesApi(apiClient);

    try {
      //Document ID 등 파일 정보를 호출
      const response = await envelopesApi.listDocuments(
        apiAccountId,
        envelopeId,
        null
      );

      const { envelopeDocuments } = response || { envelopeDocuments: [] };

      if (Array.isArray(envelopeDocuments) && envelopeDocuments.length > 0) {
        const { documentId, name } = envelopeDocuments[0] as {
          documentId: string;
          name: string;
        };

        //Document Buffer 호출
        const downloadFile = await envelopesApi.getDocument(
          apiAccountId,
          envelopeId,
          documentId,
          {}
        );

        if (documentId && documentId !== "certificate") {
          const bufferData: Buffer = downloadFile as unknown as Buffer;
          return {
            result: true,
            fileName: name,
            buffer: bufferData,
            envelopeId,
          };
        }
      }

      return {
        result: false,
      };
    } catch (error) {
      return {
        result: false,
        error,
      };
    }
  } else {
    return {
      result: false,
    };
  }
}

//최종 서명 날짜 찾기
export async function findContractCompleteTime(
  envelopeId: string,
  lastSignerRoleName: string
): Promise<{
  completedDateTime: string;
  year: string;
  month: string;
  day: string;
  time: string;
} | null> {
  let accountInfo = await authenticate();

  if (!accountInfo) {
    console.error("❌ 인증 실패: API 요청을 중단합니다.");
    return null;
  }

  const { accessToken, apiAccountId: accountId, basePath } = accountInfo;

  const apiClient = new docusign.ApiClient();
  apiClient.setBasePath(basePath);
  apiClient.addDefaultHeader("Authorization", "Bearer " + accessToken);

  const envelopesApi = new docusign.EnvelopesApi(apiClient);

  try {
    const envelope = await envelopesApi.getEnvelope(accountId, envelopeId);
    if (!envelope.completedDateTime) {
      console.error("❌ 서명 완료 날짜가 없습니다.");
      return null;
    }

    // 🔹 `SIGNER_ID` 가져오기
    const signerId = await getSignerId(
      basePath,
      accountId,
      accessToken,
      envelopeId,
      lastSignerRoleName
    );
    if (!signerId) {
      console.error("❌ 서명자 ID를 찾을 수 없습니다.");
      return null;
    }

    const completedDate = dayjs(envelope.completedDateTime);
    const year = completedDate.format("YYYY").toString();
    const month = completedDate.format("MM").toString();
    const day = completedDate.format("DD").toString();
    const time = completedDate.format("HH:mm").toString();

    return {
      completedDateTime: envelope.completedDateTime,
      year,
      month,
      day,
      time,
    };
  } catch (error) {
    console.error("❌ 서명 완료 후 날짜 추가 실패:", error);
    return null;
  }
}

export async function getRecipients(
  envelopeId: string,
  recipientId: string
): Promise<{ result: boolean; message?: string }> {
  try {
    let accountInfo = await authenticate();

    if (!accountInfo) {
      console.error("❌ 인증 실패: API 요청을 중단합니다.");
      return {
        result: false,
        message: "인증 실패: API 요청을 중단합니다.",
      };
    }

    const { accessToken, apiAccountId: accountId, basePath } = accountInfo;

    const apiClient = new docusign.ApiClient();
    apiClient.setBasePath(basePath);
    apiClient.addDefaultHeader("Authorization", "Bearer " + accessToken);

    const envelopesApi = new docusign.EnvelopesApi(apiClient);

    const response = await envelopesApi.listRecipients(accountId, envelopeId);

    const singers: { [key: string]: any }[] = response?.signers ?? [];

    // 🔹 특정 서명자(Role Name 기준)의 Recipient ID 찾기
    const signer = singers.find((s) => s.recipientId === recipientId);
    if (!signer) {
      console.error("❌ 해당 Role Name을 가진 서명자를 찾을 수 없습니다.");
      return {
        result: false,
        message: "해당 Recipient id를 가진 서명자를 찾을 수 없습니다.",
      };
    }    

    const { autoRespondedReason, status } = signer;

    if (autoRespondedReason || status === "status") {
      return {
        result: false,
        message: autoRespondedReason,
      };
    }

    return {
      result: true,
    };
  } catch (error) {
    console.error("Error retrieving recipients:", error);
    return { result: false, message: (error as Error).message };
  }
}