import { IOperationsRepository, ObjeniousOperation, ObjeniousOperationChange } from "sim-shared/domain/operationsRepository.port.js";
import { Result, tryCatch } from "sim-shared/domain/Result.js";
import { PgClient } from "sim-shared/infrastructure/PgClient.js";
import { ObjeniousLine, ObjeniousLineResponse } from "../domain/objeniousLine.js";
import { HttpClient } from "./HTTPClient.js";
import assert from "node:assert";
import { AxiosResponse } from "axios";

export class ObjeniousOperationsRepository implements IOperationsRepository {

  constructor(
    private http: HttpClient,
    private readonly pgClient: PgClient
  ) {
  }

  /**
   * Consulta el estado de una o mas lineas directamente a la API de Objenious
   * TODO: No hay paginacion como en getLinesByStatusAPI
   */
  public async getLinesAPI(
    identifierType: "ICCID" | "IMSI" | "IMEI" | "MSISDN" | "REFERENCE",
    identifiers: string[]
  ): Promise<Result<string, ObjeniousLine[]>> {
    if (identifiers.length == 0) {
      return {
        data: []
      }
    }

    // Comprobar < MAX_PAGE_SIZE (Poco probable) 

    const path = "/lines"
    const params = {
      "identifier.identifierType": identifierType,
      "identifier.identifiers": identifiers.toString()
    }

    const req = this.http.client.get<ObjeniousLineResponse>(path, {
      params: params
    })

    const res = await tryCatch(req)

    if (res.error != undefined) {
      return {
        error: res.error?.message
      }
    }

    const lines = res.data.data.content

    return {
      data: lines
    }
  }


  private MAX_PAGE_SIZE = 1000
  public async * getLinesByStatusAPI(args?: {
    pageSize?: number,
    pageNumber?: number,
    status?: string,
    iccids?: string[]
  }): AsyncGenerator<Result<string, ObjeniousLine[]>, Result<string, ObjeniousLine[]>, any> {

    const path = "/lines"
    const pageSize = args?.pageSize ?? this.MAX_PAGE_SIZE;

    let currentPage = args?.pageNumber ?? 0;
    let totalPages: number | undefined = undefined; // Como limite de paginas, igual es pasarse pero hasta que se lea

    const params: Record<string, string | number> = {}

    // Si se va a filtrar por iccids especificamente, en un futuro habra que ampliar el tipo de filtros
    if (args?.iccids != undefined) {
      params["identifier.identifierType"] = "ICCID"
      params["identifier.identifiers"] = args.iccids.toString()
    }

    const loadNextLine = async (page: number): Promise<Result<string, ObjeniousLine[]>> => {
      if (args?.status != undefined) params["simStatus"] = args.status
      params["pageSize"] = pageSize
      params["pageNumber"] = page
      console.log(`[i] Cargando pagina ${currentPage} de ${totalPages ?? "(desc)"}`)
      const nextPage = await tryCatch<AxiosResponse<ObjeniousLineResponse>>(this.http.client.get(path, {
        params: params
      }))

      if (nextPage.error != undefined) {
        console.error(nextPage.error)
        return {
          error: nextPage.error.message
        }
      }

      // Se aumenta para la siguiente ejecucion
      console.log(`[i] Página ${currentPage} completa, total: ${nextPage.data.data.totalPages}`)
      totalPages = nextPage.data.data.totalPages

      return {
        data: nextPage.data.data.content
      }

    }

    // El inicio se ejecuta siempre
    const lines = await loadNextLine(currentPage)

    if (lines.error != undefined) {
      console.error("[x] Error obteniendo las lineas, cancelando operación");
      return {
        error: "Error cargando lineas"
      }
    }

    currentPage++;

    yield {
      data: lines.data
    }

    // Copia para evitar bucles infinitos por error de la api
    const maxPages = totalPages
    assert.ok(maxPages != undefined, "No se ha defindo el numero de paginas") // Nunca deberia pasar pero así se evitan bucles infnitos
    console.log("maxPages", maxPages)
    for (let i = currentPage; i < maxPages!; i++) {
      console.log("Bucle i:", i, "page: ", currentPage)
      yield await loadNextLine(currentPage);
      currentPage++;
    }

    return {
      data: []
    }
  }
  async createOperation(data: ObjeniousOperation): Promise<Result<string, ObjeniousOperation>> {
    const query = `
      INSERT INTO objenious_operation (operation, iccids, status, max_retry, request_id)
      VALUES                          ($1,        $2,     $3,     $4,        $5)
      RETURNING *`;
    const values = [data.operation, data.iccids, data.status, data.max_retry, data.request_id];
    const { rows } = await this.pgClient.query(query, values);
    return <Result<string, ObjeniousOperation>>{
      data: rows[0]
    }
  }


  async getLastOperationOfLine(iccid: string) {
    const query = `
      SELECT * FROM public.objenious_operation
      WHERE iccids = $1 and error is null
      ORDER BY id asc limit 1
    `
    const values = [iccid];
    const { rows } = await this.pgClient.query(query, values);
    return <Result<string, ObjeniousOperation>>{
      data: rows[0]
    }
  }

  async updateOperation(data: ObjeniousOperationChange): Promise<Result<string, ObjeniousOperation>> {
    const client = await this.pgClient.connect();
    const {
      new_status,
      previous_status,
      error,
      new_request_id,
      new_mass_action_id,
      operation_id,
      new_objenious_status,
      previous_objenious_status
    } = data

    try {
      await client.query('BEGIN');
      // 1. Actualizar objenious_operation (la operacion base)
      const updateParams = [operation_id, new_status, error, new_request_id, new_mass_action_id, new_objenious_status]
      const updateOpQuery = `
        UPDATE objenious_operation 
        SET 
          status = $2::status_enum,
          error = COALESCE($3,error),
          request_id = COALESCE($4, request_id),
          mass_action_id = COALESCE($5, mass_action_id),
          last_change_date = now() at time zone 'utc',
          end_date = CASE WHEN $2 IN ('finished','error') THEN now() at time zone 'utc' ELSE end_date END,
          objenious_status = $6 
        WHERE id = $1`;

      const operation = await client.query<ObjeniousOperation>(
        updateOpQuery, updateParams)

      // 2. Nuevo registro en objenious_operation_change (indica un cambio de estado)
      const insertChangeQuery = `
        INSERT INTO objenious_operation_change (operation_id, new_status, previous_status, error, new_request_id, new_mass_action_id, new_objenious_status, previous_objenious_status)
        VALUES                                 ($1,           $2,         $3,              $4,    $5,             $6,                 $7,                   $8)`;
      await client.query(insertChangeQuery, [operation_id, new_status, previous_status, error, new_request_id, new_mass_action_id, new_objenious_status, previous_objenious_status]);
      await client.query('COMMIT');

      return <Result<string, ObjeniousOperation>>{
        data: operation.rows[0]
      }
    } catch (e) {
      console.error("Error añadiendo actualizacion de la operation", e)
      console.error("datos errorneos", data)
      await client.query('ROLLBACK');
      return <Result<string, ObjeniousOperation>>{
        data: undefined,
        error: e
      }
    } finally {
      client.release();
    }
  }

  async getPendingOperations(): Promise<Result<string, ObjeniousOperation[]>> {
    // Aprovecha el índice 'pending_operations' 
    const query = `SELECT * FROM objenious_operation WHERE end_date IS NULL ORDER BY start_date ASC`;
    try {
      const { rows } = await this.pgClient.query<ObjeniousOperation>(query);
      return {
        error: undefined,
        data: rows
      };
    } catch (e) {
      return {
        error: String(e),
        data: undefined
      }
    }
  }
}