import { useCallback, useReducer } from "react";
import {
  sendFeedback,
  type FeedbackContext,
  type FeedbackErrorCode,
  isFeedbackErrorCode,
} from "../services/feedbackService";

export type FeedbackStatus = "idle" | "sending" | "success" | "error";

export interface FeedbackState {
  status: FeedbackStatus;
  errorCode: FeedbackErrorCode | null;
}

export type FeedbackAction =
  | { type: "SEND_START" }
  | { type: "SEND_SUCCESS" }
  | { type: "SEND_ERROR"; code: FeedbackErrorCode }
  | { type: "RESET" };

export const initialFeedbackState: FeedbackState = {
  status: "idle",
  errorCode: null,
};

export function feedbackReducer(
  _state: FeedbackState,
  action: FeedbackAction,
): FeedbackState {
  switch (action.type) {
    case "SEND_START":
      return { status: "sending", errorCode: null };
    case "SEND_SUCCESS":
      return { status: "success", errorCode: null };
    case "SEND_ERROR":
      return { status: "error", errorCode: action.code };
    case "RESET":
      return initialFeedbackState;
  }
}

export interface SubmitArgs {
  content: string;
  userId?: string | null;
  context?: FeedbackContext;
}

export function useFeedback() {
  const [state, dispatch] = useReducer(feedbackReducer, initialFeedbackState);

  const submit = useCallback(async (args: SubmitArgs) => {
    dispatch({ type: "SEND_START" });
    try {
      await sendFeedback(args);
      dispatch({ type: "SEND_SUCCESS" });
    } catch (e) {
      const code: FeedbackErrorCode = isFeedbackErrorCode(e)
        ? e
        : "network_error";
      dispatch({ type: "SEND_ERROR", code });
    }
  }, []);

  const reset = useCallback(() => dispatch({ type: "RESET" }), []);

  return { state, submit, reset };
}