import React, { useCallback, useState } from "react";
import {
    Dialog, DialogContent, DialogActions, Button, TextField,
    InputAdornment, IconButton,
} from "@mui/material";
import DialogHeader from "components/common/DialogHeader";
import VisibilityIcon from "@mui/icons-material/Visibility";
import VisibilityOffIcon from "@mui/icons-material/VisibilityOff";
import PersonIcon from "@mui/icons-material/Person";
import { useAuth } from "hooks/useAuth";
import { useNotification } from "hooks/useNotification";
import { useDialogClose } from "hooks/useDialogClose";
import { ApiError } from "api/client/ApiError";

interface LoginDialogProps {
    open: boolean;
    onClose: () => void;
}

export default function LoginDialog({ open, onClose }: LoginDialogProps): React.JSX.Element {
    const [username, setUsername] = useState("");
    const [password, setPassword] = useState("");
    const [showPassword, setShowPassword] = useState(false);
    const { login } = useAuth();
    const { showSuccess, showError } = useNotification();

    const onOpen = useCallback(() => {
        setUsername("");
        setPassword("");
        setShowPassword(false);
    }, []);

    const { isOpen, requestClose, transitionProps } = useDialogClose(open, onClose, onOpen);

    const handleSubmit = async (): Promise<void> => {
        if (!username || !password) {
            return;
        }
        try {
            await login(username, password);
            requestClose();
            showSuccess("Logged in", `Successfully logged in as ${username}`);
            window.location.reload();
        } catch (e) {
            const detail = ApiError.errorDetail(e);
            if (username === "admin" && password === "admin") {
                showError("Login error", "You've entered a password for user \"root\", did you make a typo in username?");
            } else {
                showError("Login error", `Could not login as ${username}: ${detail}`);
            }
        }
    };

    return (
        <Dialog open={isOpen} onClose={requestClose} maxWidth="xs" fullWidth slotProps={{ transition: transitionProps }}>
            <DialogHeader onClose={requestClose}>
                Login
            </DialogHeader>
            <DialogContent>
                <TextField
                    label="username"
                    fullWidth
                    margin="normal"
                    value={username}
                    onChange={(e) => setUsername(e.target.value)}
                    autoFocus
                />
                <TextField
                    label="password"
                    fullWidth
                    margin="normal"
                    type={showPassword ? "text" : "password"}
                    value={password}
                    onChange={(e) => setPassword(e.target.value)}
                    onKeyDown={(e) => {
                        if (e.key === "Enter") {
                            void handleSubmit();
                        }
                    }}
                    slotProps={{
                        input: {
                            endAdornment: (
                                <InputAdornment position="end">
                                    <IconButton aria-label={showPassword ? "Hide password" : "Show password"} onClick={() => setShowPassword(!showPassword)} edge="end" size="small">
                                        {showPassword ? <VisibilityOffIcon /> : <VisibilityIcon />}
                                    </IconButton>
                                </InputAdornment>
                            ),
                        },
                    }}
                />
            </DialogContent>
            <DialogActions>
                <Button onClick={() => void handleSubmit()} variant="contained" startIcon={<PersonIcon />}>login</Button>
            </DialogActions>
        </Dialog>
    );
}