import * as React from "react";

import AppBar from "@material-ui/core/AppBar";
import Toolbar from "@material-ui/core/Toolbar";
import Typography from "@material-ui/core/Typography";
import IconButton from "@material-ui/core/IconButton";
import SwipeableDrawer from "@material-ui/core/SwipeableDrawer";
import List from "@material-ui/core/List";
import ListItem from "@material-ui/core/ListItem";
import ListItemIcon from "@material-ui/core/ListItemIcon";
import ListItemText from "@material-ui/core/ListItemText";
import Divider from "@material-ui/core/Divider";
import Avatar from "@material-ui/core/Avatar";
import MenuIcon from "@material-ui/icons/Menu";
import SettingsIcon from "@material-ui/icons/Settings";
import PersonIcon from "@material-ui/icons/Person";
import InfoIcon from "@material-ui/icons/Info";

import { BrowserRouter, Route, Redirect } from "react-router-dom";

import AuthRoute from "../security/AuthRoute";

import Dashboard from "../pages/dashboard";
import LoginPage from "../pages/login";
import LevelListPage from "../pages/levelList";
import LevelPage from "../pages/level";
import ReviewPage from "../pages/review";

import { ILevel } from "../models/level";
import { IVocab } from "../models/vocab";

interface IState {
    loggedIn: boolean;

    drawerOpen: boolean;
}

// TODO: Replace the sessionStorage with localStorage
export default class Application extends React.Component<{}, IState> {
    constructor(props: any) {
        super(props);

        // Load a key from the SessionStorage
        const authKey = window.sessionStorage.getItem("authKey") || null;
        // TODO
        const loggedIn = authKey !== null;

        this.state = {
            loggedIn,
            drawerOpen: false,
        };

        this.login = this.login.bind(this);
        this.isAuthenticated = this.isAuthenticated.bind(this);
    }

    getLevels(): ILevel[] {
        // TODO: Actually fetch them from somewhere
        const levels = [{
            name: "Der Bauer auf dem Feld",
            desc: "So fängt alles an: Du bist ein einfacher Bauer und musst dich die Karriereleiter mit deinen freshen Latein-Skills hinaufarbeiten",
            level: 1,
            done: true,
        }, {
            name: "???",
            desc: "Warum schreibe ich überhaupt was?dsd dddddddddddddddddddddd",
            level: 2,
            done: false,
        }];

        return levels;
    }

    getLearners(): ILearner[] {
        return [{
            username: "Polynomdivision",
            level: 5,
            score: 400,
        }, {
            username: "Polynomdivision2",
            level: 3,
            score: 500,
        }, {
            username: "Der eine Typ",
            level: 7,
            score: 100,
        }];
    }

    getNextLevel(): ILevel {
        // TODO: Actually fetch data
        return {
            name: "???",
            desc: "Warum schreibe ich überhaupt was?dsd dddddddddddddddddddddd",
            level: 2,
            done: false,
        };
    }

    getLevelVocab(id: string): IVocab[] {
        // TODO: Actually implement this
        // TODO: Don't fetch this when it was already fetched once.
        return [{
            latin: "Vinum",
            german: "Wein",
            hint: "Worte auf '-um' sind meistens NeutrUM"
            id: 0
        }, {
            latin: "Vinum (Genitiv)",
            german: "<Wortbedeutung>",
            id: 1
        }, {
            latin: "Vici",
            german: "<Wortbedeutung>",
            hint: "Wird \"Viki\" und nicht \"Vichi\" ausgesprochen",
            mnemonic: "Merk dir das Wort mit Caesars berühmten Worten: \"Veni Vidi Vici\"; Er kam, sah und siegte",
            id: 2
        }, {
            latin: "fuga",
            german: "Flucht",
            hint: "Worte auf \"-a\" sind FeminA",
            id: 3
        }] as IVocab[];
    }

    login(username: string, password: string): Promise<boolean> {
        return new Promise((res, rej) => {
            // TODO
            this.setState({
                loggedIn: true
            });
            res();
        });
    }

    // Checks whether the user is logged in
    isAuthenticated() {
        // TODO: Security?
        return this.state.loggedIn === true;
    }

    render() {
        return <BrowserRouter
            basename="/app/">
            <div className="flex">
                <AppBar position="static">
                    <Toolbar>
                        {
                            this.isAuthenticated() ? (
                                <IconButton
                                    color="inherit"
                                    onClick={() => this.setState({ drawerOpen: true })}>
                                    <MenuIcon />
                                </IconButton>
                            ) : undefined
                        }
                        <Typography className="flex" variant="title" color="inherit">
                            Lateinicus
                    </Typography>
                    </Toolbar>
                </AppBar>
                <SwipeableDrawer
                    anchor="left"
                    open={this.state.drawerOpen}
                    onClose={() => this.setState({ drawerOpen: false, })}
                    onOpen={() => this.setState({ drawerOpen: true })}>
                    <List component="nav">
                        <ListItem>
                            {/* TODO: Replace with the actual username */}
                            <Avatar alt="{Username}" style={{ width: 80, height: 80 }} src="https://avatarfiles.alphacoders.com/105/105250.jpg" />
                            <ListItemText primary="{Username}" />
                        </ListItem>

                        <Divider />

                        <ListItem button>
                            <ListItemIcon>
                                <PersonIcon />
                            </ListItemIcon>
                            <ListItemText primary="Profil" />
                        </ListItem>
                        <ListItem button>
                            <ListItemIcon>
                                <SettingsIcon />
                            </ListItemIcon>
                            <ListItemText primary="Einstellungen" />
                        </ListItem>

                        <Divider />

                        <ListItem button>
                            <ListItemText primary="Widerholen" />
                        </ListItem>
                        <ListItem button>
                            <ListItemText>
                                Levelübersicht
                            </ListItemText>
                        </ListItem>

                        <Divider />

                        <ListItem button onClick={() => {
                            // Remove the auth token from the SessionStorage
                            window.sessionStorage.removeItem("authKey");
                            // Set the loggedIn State to false
                            this.setState({
                                loggedIn: false,
                                // In case the drawer was open
                                drawerOpen: false,
                            });
                        }}>
                            <ListItemText>
                                Abmelden
                            </ListItemText>
                        </ListItem>

                        <Divider />

                        <ListItem button onClick={() => window.location = "https://gitlab.com/Polynomdivision/Lateinicus/tree/master"}>
                            <ListItemIcon>
                                <InfoIcon />
                            </ListItemIcon>
                            <ListItemText primary="Über" />
                        </ListItem>
                    </List>
                </SwipeableDrawer>

                <div className="content">
                    <Route exact path="/" component={() => <Redirect to="/login" />} />
                    <Route exact path="/login" component={() => {
                        return <LoginPage loggedIn={this.state.loggedIn} login={this.login} />
                    }} />
                    <AuthRoute
                        isAuth={this.isAuthenticated}
                        path="/dashboard"
                        component={() => <Dashboard nextLevel={this.getNextLevel} learners={this.getLearners()} />} />
                    <AuthRoute
                        isAuth={this.isAuthenticated}
                        path="/levelList"
                        component={() => <LevelListPage levels={this.getLevels()} />} />
                    {/*We cannot use AuthRoute here, because match is undefined otherwise*/}
                    <Route
                        path="/level/:id"
                        component={({ match }) => {
                            if (this.isAuthenticated()) {
                                return <LevelPage id={match.params.id} levelVocab={this.getLevelVocab} />;
                            } else {
                                return <Redirect to="/login" />;
                            }
                        }} />
                    <Route
                        path="/review/level/:id"
                        component={({ match }) => {
                            if (this.isAuthenticated()) {
                                return <ReviewPage levelId={match.params.id} vocabByLevel={this.getLevelVocab} />;
                            } else {
                                return <Redirect to="/login" />;
                            }
                        }} />
                </div>
            </div>
        </BrowserRouter>;
    }
};