import { StackActions, useNavigation } from "@react-navigation/native";
import { resolveThreadReferenceCopyTarget } from "@t3tools/shared/threadReference";
import {
  useCallback,
  useEffect,
  useMemo,
  useRef,
  useState,
  useSyncExternalStore,
  type PropsWithChildren,
} from "react";

import { tryCopyTextWithHaptic } from "../../lib/copyTextWithHaptic";
import { T3KeyboardCommands } from "../../native/T3KeyboardCommands";
import { useThreadShell } from "../../state/entities";
import type { GitActionProgress } from "../../state/use-vcs-action-state";
import { GitActionProgressOverlay } from "../threads/GitActionProgressOverlay";
import {
  dispatchHardwareKeyboardCommand,
  getHardwareKeyboardCommandRegistrationVersion,
  getRegisteredHardwareKeyboardCommands,
  parseActiveThreadPath,
  subscribeToHardwareKeyboardCommandRegistrations,
  type HardwareKeyboardCommand,
} from "./hardwareKeyboardCommands";

const EMPTY_COPY_FEEDBACK: GitActionProgress = {
  phase: "idle",
  label: null,
  description: null,
};
const COPY_FEEDBACK_DISMISS_MS = 3_000;

export function HardwareKeyboardCommandProvider({
  children,
  pathname,
}: PropsWithChildren<{ readonly pathname: string }>) {
  const navigation = useNavigation();
  const activeThreadRef = useMemo(() => parseActiveThreadPath(pathname), [pathname]);
  const activeThread = useThreadShell(activeThreadRef);
  const copyTarget = useMemo(
    () =>
      activeThreadRef === null
        ? null
        : resolveThreadReferenceCopyTarget({
            threadId: activeThread?.id ?? activeThreadRef.threadId,
            pullRequests: activeThread?.pullRequests,
            linkedPullRequestUrl:
              (activeThread?.linkedPullRequest ?? activeThread?.branchPullRequest)?.url ?? null,
          }),
    [activeThread, activeThreadRef],
  );
  const [copyFeedback, setCopyFeedback] = useState<GitActionProgress>(EMPTY_COPY_FEEDBACK);
  const copyRequestIdRef = useRef(0);
  const copyFeedbackTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
  const dismissCopyFeedback = useCallback(() => {
    if (copyFeedbackTimerRef.current !== null) {
      clearTimeout(copyFeedbackTimerRef.current);
      copyFeedbackTimerRef.current = null;
    }
    setCopyFeedback(EMPTY_COPY_FEEDBACK);
  }, []);
  const showCopyFeedback = useCallback((feedback: GitActionProgress) => {
    if (copyFeedbackTimerRef.current !== null) {
      clearTimeout(copyFeedbackTimerRef.current);
    }
    setCopyFeedback(feedback);
    copyFeedbackTimerRef.current = setTimeout(() => {
      copyFeedbackTimerRef.current = null;
      setCopyFeedback(EMPTY_COPY_FEEDBACK);
    }, COPY_FEEDBACK_DISMISS_MS);
  }, []);
  useEffect(
    () => () => {
      if (copyFeedbackTimerRef.current !== null) {
        clearTimeout(copyFeedbackTimerRef.current);
      }
    },
    [],
  );
  const registrationVersion = useSyncExternalStore(
    subscribeToHardwareKeyboardCommandRegistrations,
    getHardwareKeyboardCommandRegistrationVersion,
    getHardwareKeyboardCommandRegistrationVersion,
  );
  const enabledCommands = useMemo(() => {
    const commands = new Set<HardwareKeyboardCommand>(getRegisteredHardwareKeyboardCommands());
    commands.add("newTask");
    if (pathname !== "/" || navigation.canGoBack()) commands.add("back");
    if (activeThreadRef !== null) {
      commands.add("files");
      commands.add("terminal");
      commands.add("review");
      if (pathname.split("/")[4] !== "terminal") commands.add("copyThreadReference");
    }
    return [...commands];
  }, [pathname, registrationVersion, navigation]);

  const onCommand = useCallback(
    (command: HardwareKeyboardCommand) => {
      if (dispatchHardwareKeyboardCommand(command)) return;

      if (command === "copyThreadReference") {
        if (copyTarget === null) return;
        const requestId = ++copyRequestIdRef.current;
        void tryCopyTextWithHaptic(copyTarget.value, {
          target: copyTarget.clipboardTarget,
        }).then((didCopy) => {
          if (requestId !== copyRequestIdRef.current) return;
          showCopyFeedback(
            didCopy
              ? {
                  phase: "success",
                  label: copyTarget.successTitle,
                  description: copyTarget.value,
                }
              : {
                  phase: "error",
                  label: copyTarget.failureTitle,
                  description: "Try again.",
                },
          );
        });
        return;
      }

      if (command === "newTask") {
        navigation.navigate("NewTaskSheet", { screen: "NewTask" });
        return;
      }
      if (command === "back") {
        if (navigation.canGoBack()) {
          navigation.goBack();
        } else {
          navigation.dispatch(StackActions.replace("Home"));
        }
        return;
      }

      const thread = parseActiveThreadPath(pathname);
      if (!thread) return;
      if (command === "files" && !/\/files(?:\/|$)/.test(pathname)) {
        navigation.navigate("ThreadFiles", thread);
      }
      if (command === "terminal" && !/\/terminal(?:\/|$)/.test(pathname)) {
        navigation.navigate("ThreadTerminal", thread);
      }
      if (command === "review" && !/\/review(?:\/|$)/.test(pathname)) {
        navigation.navigate("ThreadReview", thread);
      }
    },
    [copyTarget, navigation, pathname, showCopyFeedback],
  );

  return (
    <>
      <T3KeyboardCommands enabledCommands={enabledCommands} onCommand={onCommand}>
        {children}
      </T3KeyboardCommands>
      <GitActionProgressOverlay progress={copyFeedback} onDismiss={dismissCopyFeedback} />
    </>
  );
}