import * as Sentry from "@sentry/react";
import { Span, SpanStatus } from "@sentry/tracing";
import { getAppsmithConfigs } from "@appsmith/configs";
import _ from "lodash";
import * as log from "loglevel";

export enum PerformanceTransactionName {
  DATA_TREE_EVALUATION = "DATA_TREE_EVALUATION",
  SET_EVALUATED_TREE = "SET_EVALUATED_TREE",
  EXECUTE_PAGE_LOAD_ACTIONS = "EXECUTE_PAGE_LOAD_ACTIONS",
  ENTITY_EXPLORER_ENTITY = "ENTITY_EXPLORER_ENTITY",
  ENTITY_EXPLORER = "ENTITY_EXPLORER",
  CLOSE_SIDE_PANE = "CLOSE_SIDE_PANE",
  OPEN_ACTION = "OPEN_ACTION",
  SIDE_BAR_MOUNT = "SIDE_BAR_MOUNT",
  EXECUTE_ACTION = "EXECUTE_ACTION",
  CHANGE_API_SAGA = "CHANGE_API_SAGA",
  SYNC_PARAMS_SAGA = "SYNC_PARAMS_SAGA",
  RUN_API_CLICK = "RUN_API_CLICK",
  RUN_API_SHORTCUT = "RUN_API_SHORTCUT",
  RUN_QUERY_CLICK = "RUN_QUERY_CLICK",
  RUN_QUERY_SHORTCUT = "RUN_QUERY_SHORTCUT",
  FETCH_ACTIONS_API = "FETCH_ACTIONS_API",
  FETCH_PAGE_LIST_API = "FETCH_PAGE_LIST_API",
  FETCH_PAGE_ACTIONS_API = "FETCH_PAGE_ACTIONS_API",
  FETCH_PAGE_API = "FETCH_PAGE_API",
  SAVE_PAGE_API = "SAVE_PAGE_API",
  UPDATE_ACTION_API = "UPDATE_ACTION_API",
  OPEN_PROPERTY_PANE = "OPEN_PROPERTY_PANE",
  REFACTOR_ACTION_NAME = "REFACTOR_ACTION_NAME",
  USER_ME_API = "USER_ME_API",
  SIGN_UP = "SIGN_UP",
  LOGIN_CLICK = "LOGIN_CLICK",
  INIT_EDIT_APP = "INIT_EDIT_APP",
  INIT_VIEW_APP = "INIT_VIEW_APP",
  SHOW_RESIZE_HANDLES = "SHOW_RESIZE_HANDLES",
}

export type PerfTag = {
  name: string;
  value: string;
};
export interface PerfLog {
  sentrySpan: Span;
  skipLog?: boolean;
  eventName: string;
}

const appsmithConfigs = getAppsmithConfigs();

class PerformanceTracker {
  private static perfLogQueue: PerfLog[] = [];
  private static perfAsyncMap: Map<string, PerfLog> = new Map();

  static startTracking = (
    eventName: PerformanceTransactionName,
    data?: any,
    skipLog = false,
    tags: Array<PerfTag> = [],
  ) => {
    if (appsmithConfigs.sentry.enabled) {
      const currentTransaction = Sentry.getCurrentHub()
        .getScope()
        ?.getTransaction();
      if (
        PerformanceTracker.perfLogQueue.length === 0 &&
        currentTransaction !== undefined &&
        currentTransaction.status === SpanStatus.Ok
      ) {
        PerformanceTracker.perfLogQueue.push({
          sentrySpan: currentTransaction,
          skipLog: skipLog,
          eventName: eventName,
        });
      }
      if (PerformanceTracker.perfLogQueue.length === 0) {
        if (!skipLog) {
          log.debug(
            PerformanceTracker.generateSpaces(
              PerformanceTracker.perfLogQueue.length + 1,
            ) +
              eventName +
              " Track Transaction ",
          );
        }
        const newTransaction = Sentry.startTransaction({ name: eventName });

        tags.forEach(({ name: tagName, value }) => {
          newTransaction.setTag(tagName, value);
        });

        newTransaction.setData("startData", data);
        Sentry.getCurrentHub().configureScope((scope) =>
          scope.setSpan(newTransaction),
        );
        PerformanceTracker.perfLogQueue.push({
          sentrySpan: newTransaction,
          skipLog: skipLog,
          eventName: eventName,
        });
      } else {
        if (!skipLog) {
          log.debug(
            PerformanceTracker.generateSpaces(
              PerformanceTracker.perfLogQueue.length + 1,
            ) +
              eventName +
              " Track Span ",
          );
        }
        const currentPerfLog =
          PerformanceTracker.perfLogQueue[
            PerformanceTracker.perfLogQueue.length - 1
          ];
        const currentRunningSpan = currentPerfLog.sentrySpan;
        const span = currentRunningSpan.startChild({
          op: eventName,
          data: data,
        });
        PerformanceTracker.perfLogQueue.push({
          sentrySpan: span,
          skipLog: skipLog,
          eventName: eventName,
        });
      }
    }
  };

  static stopTracking = (
    eventName?: PerformanceTransactionName,
    data?: any,
  ) => {
    if (appsmithConfigs.sentry.enabled) {
      if (eventName) {
        const index = _.findLastIndex(
          PerformanceTracker.perfLogQueue,
          (perfLog) => {
            return perfLog.eventName === eventName;
          },
        );
        if (index !== -1) {
          for (
            let i = PerformanceTracker.perfLogQueue.length - 1;
            i >= index;
            i--
          ) {
            const perfLog = PerformanceTracker.perfLogQueue.pop();
            if (perfLog) {
              const currentSpan = perfLog.sentrySpan;
              currentSpan.finish();
              if (!perfLog?.skipLog) {
                PerformanceTracker.printDuration(
                  perfLog.eventName,
                  i + 1,
                  currentSpan.startTimestamp,
                  currentSpan.endTimestamp,
                );
              }
            }
          }
        }
      } else {
        const perfLog = PerformanceTracker.perfLogQueue.pop();
        if (perfLog) {
          const currentRunningSpan = perfLog?.sentrySpan;
          currentRunningSpan.setData("endData", data);
          currentRunningSpan.finish();
          if (!perfLog?.skipLog) {
            PerformanceTracker.printDuration(
              perfLog.eventName,
              PerformanceTracker.perfLogQueue.length + 1,
              currentRunningSpan.startTimestamp,
              currentRunningSpan.endTimestamp,
            );
          }
        }
      }
    }
  };

  static startAsyncTracking = (
    eventName: PerformanceTransactionName,
    data?: any,
    uniqueId?: string,
    parentEventId?: string,
    skipLog = false,
  ) => {
    if (!skipLog) {
      log.debug(
        "Async " +
          PerformanceTracker.generateSpaces(0) +
          eventName +
          " Track Transaction ",
      );
    }
    if (!parentEventId) {
      const newTransaction = Sentry.startTransaction({ name: eventName });
      newTransaction.setData("startData", data);
      PerformanceTracker.perfAsyncMap.set(uniqueId ? uniqueId : eventName, {
        sentrySpan: newTransaction,
        eventName: eventName,
        skipLog: skipLog,
      });
    } else {
      const perfLog = PerformanceTracker.perfAsyncMap.get(parentEventId);
      const childSpan = perfLog?.sentrySpan.startChild({
        op: eventName,
        data: data,
      });
      if (childSpan) {
        PerformanceTracker.perfAsyncMap.set(uniqueId ? uniqueId : eventName, {
          sentrySpan: childSpan,
          eventName: eventName,
          skipLog: skipLog,
        });
      }
    }
  };

  static stopAsyncTracking(
    eventName: PerformanceTransactionName,
    data?: any,
    uniqueId?: string,
  ) {
    const perfLog = PerformanceTracker.perfAsyncMap.get(
      uniqueId ? uniqueId : eventName,
    );
    if (perfLog) {
      const currentSpan = perfLog.sentrySpan;
      currentSpan.setData("endData", data);
      currentSpan.finish();
      if (!perfLog?.skipLog) {
        PerformanceTracker.printDuration(
          perfLog.eventName,
          0,
          currentSpan.startTimestamp,
          currentSpan.endTimestamp,
          true,
        );
      }
    }
  }

  static generateSpaces(num: number) {
    let str = "";
    for (let i = 0; i < num; i++) {
      str += "\t";
    }
    return str;
  }

  static printDuration(
    eventName: string,
    level: number,
    startTime: number,
    endTime?: number,
    isAsync?: boolean,
  ) {
    const duration = ((endTime || 0) - startTime) * 1000;
    const spaces = PerformanceTracker.generateSpaces(level);
    log.debug(
      (isAsync ? "Async " : "") +
        spaces +
        eventName +
        " Finish Tracking in " +
        duration +
        "ms",
    );
  }
}

export default PerformanceTracker;