import AppBar from "@mui/material/AppBar";
import Navigation from "./Navigation";
import Toolbar from "@mui/material/Toolbar";
import IconButton from "@mui/material/IconButton";
import MenuIcon from "@mui/icons-material/Menu";
import Typography from "@mui/material/Typography";
import * as React from "react";
import {useEffect, useRef, useState} from "react";
import Box from "@mui/material/Box";
import {subscriptionRoute, topicShortUrl} from "../app/utils";
import {useLocation, useNavigate} from "react-router-dom";
import ClickAwayListener from '@mui/material/ClickAwayListener';
import Grow from '@mui/material/Grow';
import Paper from '@mui/material/Paper';
import Popper from '@mui/material/Popper';
import MenuItem from '@mui/material/MenuItem';
import MenuList from '@mui/material/MenuList';
import MoreVertIcon from "@mui/icons-material/MoreVert";
import api from "../app/Api";
import subscriptionManager from "../app/SubscriptionManager";

const ActionBar = (props) => {
    const location = useLocation();
    let title = "ntfy";
    if (props.selectedSubscription) {
        title = topicShortUrl(props.selectedSubscription.baseUrl, props.selectedSubscription.topic);
    } else if (location.pathname === "/settings") {
        title = "Settings";
    }
    return (
        <AppBar position="fixed" sx={{
            width: '100%',
            zIndex: { sm: 1250 }, // > Navigation (1200), but < Dialog (1300)
            ml: { sm: `${Navigation.width}px` }
        }}>
            <Toolbar sx={{pr: '24px'}}>
                <IconButton
                    color="inherit"
                    edge="start"
                    onClick={props.onMobileDrawerToggle}
                    sx={{ mr: 2, display: { sm: 'none' } }}
                >
                    <MenuIcon />
                </IconButton>
                <Box component="img" src="/static/img/ntfy.svg" sx={{
                    display: { xs: 'none', sm: 'block' },
                    marginRight: '10px',
                    height: '28px'
                }}/>
                <Typography variant="h6" noWrap component="div" sx={{ flexGrow: 1 }}>
                    {title}
                </Typography>
                {props.selectedSubscription && <SettingsIcon
                    subscription={props.selectedSubscription}
                    onUnsubscribe={props.onUnsubscribe}
                />}
            </Toolbar>
        </AppBar>
    );
};

// Originally from https://mui.com/components/menus/#MenuListComposition.js
const SettingsIcon = (props) => {
    const navigate = useNavigate();
    const [open, setOpen] = useState(false);
    const anchorRef = useRef(null);

    const handleToggle = () => {
        setOpen((prevOpen) => !prevOpen);
    };

    const handleClose = (event) => {
        if (anchorRef.current && anchorRef.current.contains(event.target)) {
            return;
        }
        setOpen(false);
    };

    const handleClearAll = async (event) => {
        handleClose(event);
        console.log(`[ActionBar] Deleting all notifications from ${props.subscription.id}`);
        await subscriptionManager.deleteNotifications(props.subscription.id);
    };

    const handleUnsubscribe = async (event) => {
        console.log(`[ActionBar] Unsubscribing from ${props.subscription.id}`);
        handleClose(event);
        await subscriptionManager.remove(props.subscription.id);
        const newSelected = await subscriptionManager.first(); // May be undefined
        if (newSelected) {
            navigate(subscriptionRoute(newSelected));
        }
    };

    const handleSendTestMessage = () => {
        const baseUrl = props.subscription.baseUrl;
        const topic = props.subscription.topic;
        api.publish(baseUrl, topic,
            `This is a test notification sent by the ntfy Web UI at ${new Date().toString()}.`); // FIXME result ignored
        setOpen(false);
    }

    const handleListKeyDown = (event) => {
        if (event.key === 'Tab') {
            event.preventDefault();
            setOpen(false);
        } else if (event.key === 'Escape') {
            setOpen(false);
        }
    }

    // return focus to the button when we transitioned from !open -> open
    const prevOpen = useRef(open);
    useEffect(() => {
        if (prevOpen.current === true && open === false) {
            anchorRef.current.focus();
        }
        prevOpen.current = open;
    }, [open]);

    return (
        <>
            <IconButton
                color="inherit"
                size="large"
                edge="end"
                ref={anchorRef}
                id="composition-button"
                onClick={handleToggle}
            >
                <MoreVertIcon/>
            </IconButton>
            <Popper
                open={open}
                anchorEl={anchorRef.current}
                role={undefined}
                placement="bottom-start"
                transition
                disablePortal
            >
                {({TransitionProps, placement}) => (
                    <Grow
                        {...TransitionProps}
                        style={{
                            transformOrigin:
                                placement === 'bottom-start' ? 'left top' : 'left bottom',
                        }}
                    >
                        <Paper>
                            <ClickAwayListener onClickAway={handleClose}>
                                <MenuList
                                    autoFocusItem={open}
                                    id="composition-menu"
                                    onKeyDown={handleListKeyDown}
                                >
                                    <MenuItem onClick={handleSendTestMessage}>Send test notification</MenuItem>
                                    <MenuItem onClick={handleClearAll}>Clear all notifications</MenuItem>
                                    <MenuItem onClick={handleUnsubscribe}>Unsubscribe</MenuItem>
                                </MenuList>
                            </ClickAwayListener>
                        </Paper>
                    </Grow>
                )}
            </Popper>
        </>
    );
};

export default ActionBar;