import * as express from "express";
import { URL } from "url";

import {
  IErrorExtra_Response_DTO,
  IError_Response_DTO,
} from "@shared/contexts";
import { UseCaseError } from "../../application";
import { IServerError } from "../../domain/errors";
import { IController } from "../Controller.interface";
import { InfrastructureError } from "../InfrastructureError";
import { ProblemDocument, ProblemDocumentExtension } from "./ProblemDocument";

export abstract class ExpressController implements IController {
  protected req: express.Request;
  protected res: express.Response;
  protected next: express.NextFunction;

  protected serverURL: string = "";
  protected file: any;

  protected abstract executeImpl(): Promise<void | any>;

  public execute(
    req: express.Request,
    res: express.Response,
    next: express.NextFunction,
  ): void {
    this.req = req;
    this.res = res;
    this.next = next;

    this.serverURL = `${
      new URL(
        `${this.req.protocol}://${this.req.get("host")}${this.req.originalUrl}`,
      ).origin
    }/api/v1`;

    this.file = this.req && this.req["file"]; // <-- ????

    this.executeImpl();
  }

  public ok<T>(dto?: T) {
    if (dto) {
      return this._jsonResponse(200, dto);
    }

    return this.res.status(200).send();
  }

  public fail(error: IServerError) {
    console.group("ExpressController FAIL RESPONSE ====================");
    console.log(error);
    console.trace("Show me");
    console.groupEnd();

    return this._errorResponse(500, error ? error.toString() : "Fail");
  }

  public created<T>(dto?: T) {
    if (dto) {
      return this.res.status(201).json(dto).send();
    }

    return this.res.status(201).send();
  }

  public noContent() {
    return this.res.status(204).send();
  }

  public download(filepath: string, filename: string, done?: any) {
    return this.res.download(filepath, filename, done);
  }

  public clientError(message?: string) {
    return this._errorResponse(400, message);
  }

  public unauthorizedError(message?: string) {
    return this._errorResponse(401, message);
  }

  public paymentRequiredError(message?: string) {
    return this._errorResponse(402, message);
  }

  public forbiddenError(message?: string) {
    return this._errorResponse(403, message);
  }

  public notFoundError(message: string, error?: IServerError) {
    return this._errorResponse(404, message, error);
  }

  public conflictError(message: string, error?: IServerError) {
    return this._errorResponse(409, message, error);
  }

  public invalidInputError(message?: string, error?: InfrastructureError) {
    return this._errorResponse(422, message, error);
  }

  public tooManyError(message: string, error?: Error) {
    return this._errorResponse(429, message, error);
  }

  public internalServerError(message?: string, error?: IServerError) {
    return this._errorResponse(500, message, error);
  }

  public todoError(message?: string) {
    return this._errorResponse(501, message);
  }

  public unavailableError(message?: string) {
    return this._errorResponse(503, message);
  }

  private _jsonResponse(
    statusCode: number,
    jsonPayload: any,
  ): express.Response<any> {
    return this.res.status(statusCode).json(jsonPayload).send();
  }

  private _errorResponse(
    statusCode: number,
    message?: string,
    error?: Error | InfrastructureError,
  ): express.Response<IError_Response_DTO> {
    const context = {};

    if (Object.keys(this.res.locals).length) {
      if ("user" in this.res.locals) {
        context["user"] = this.res.locals.user;
      }
    }

    if (Object.keys(this.req.params).length) {
      context["params"] = this.req.params;
    }

    if (Object.keys(this.req.query).length) {
      context["query"] = this.req.query;
    }

    if (Object.keys(this.req.body).length) {
      context["body"] = this.req.body;
    }

    const extension = new ProblemDocumentExtension({
      context,
      extra: error ? { ...this._processError(error) } : {},
    });

    return this._jsonResponse(
      statusCode,
      new ProblemDocument(
        {
          status: statusCode,
          detail: message,
          instance: this.req.baseUrl,
        },
        extension,
      ),
    );
  }

  private _processError(
    error: Error | InfrastructureError,
  ): IErrorExtra_Response_DTO {
    /**
   * 
   * 
   *
      {
        code: "INVALID_INPUT_DATA",
        payload: {
          label: "tin",
          path: "tin", // [{path: "first_name"}, {path: "last_name"}]
        },
        name: "UseCaseError",
      }      


      {
        code: "INVALID_INPUT_DATA",
        payload: [
          {
            tin: "{tin} is not allowed to be empty",
          },
          {
            first_name: "{first_name} is not allowed to be empty",
          },
          {
            last_name: "{last_name} is not allowed to be empty",
          },
          {
            company_name: "{company_name} is not allowed to be empty",
          },
        ],
        name: "InfrastructureError",
      }

   */

    const useCaseError = <UseCaseError>error;

    const payload = !Array.isArray(useCaseError.payload)
      ? Array(useCaseError.payload)
      : useCaseError.payload;

    const errors = payload.map((item) => {
      if (item.path) {
        return item.path
          ? {
              [String(item.path)]: useCaseError.message,
            }
          : {};
      } else {
        return item;
      }
    });

    return {
      errors,
    };
  }
}