const uuid = require('node-uuid');
const UrlParser = require('url');
const DEBUG = (process.env.NODE_ENV !== "production");

const STATE = {
    COUNTDOWN: 'COUNTDOWN',
    PLAY: 'PLAY',
    SOLUTION: 'SOLUTION'
};

const Ricochet = function({ messenger }) {
    this.messenger = messenger;
    this.squaresPerSide = 20;

    // Properties that will be emitted
    this.players = {};
    this.robots = this.freshRobots();
    this.state = STATE.PLAY;
    this.walls = this.freshWalls();

    // this.id = uuid.v4();
    // this.countdownTimer = null;
    // this.guess = Infinity;
    // this.winningStack;
};

Ricochet.prototype.onConnect = function(ws, req) {
    const url = UrlParser.parse(req.url, true);
    const query = url.query;
    const santizedName = (query.name || 'Unknown').replace(/[^\w ]/g, '');

    DEBUG && console.log(`Connected: ${santizedName} (${ws.id.substr(0, 8)}) via ${req.url}`);

    this.addPlayer(ws.id, santizedName);

    this.messenger.messageAll({ type: 'players', body: this.players });
    this.messenger.messageOne(ws, { type: 'robots', body: this.robots});
    this.messenger.messageOne(ws, { type: 'connected', body: ws.id});
    this.messenger.messageOne(ws, { type: 'state', body: this.state});
    this.messenger.messageOne(ws, { type: 'walls', body: this.walls});
    // this.messenger.messageOne(ws, { type: 'winstate', body: G.getWinState()});
}

Ricochet.prototype.onMessage = function(ws, json) {

};

Ricochet.prototype.onDisconnect = function(ws) {
    DEBUG && console.log(`Disconnected: ${this.players[ws.id]} (${ws.id.substr(0, 8)})`);      

    this.removePlayer(ws.id);
    
    this.messenger.messageAll({ type: 'players', body: this.players });
};

Ricochet.prototype.addPlayer = function(id, name) {
    if (!this.players[id]) {
        this.players[id] = name;
    }
};

Ricochet.prototype.removePlayer = function(id) {
    this.players[id] = undefined;
    delete this.players[id];
};

Ricochet.prototype.freshRobots = function() {
    const robots = ['#E00000', '#00C000', '#0000FF', '#00C0C0', '#F000F0'];
    const icons = ['assets/comet.svg', 'assets/moon.svg', 'assets/planet.svg', 'assets/rocket.svg', 'assets/spacesuit.svg'];
    // // spider.svg, ufo.svg
    
    const gen = () => Math.floor(Math.random() * this.squaresPerSide);
    return robots.map((color, idx) => ({ i: gen(), j: gen(), color, id: uuid.v4(), icon: icons[idx] }));
};

Ricochet.prototype.freshWalls = function() {
    // Edge IDs are of the form [i1-j1-i2-j2]. Top left is 0, 0.
    
    // Leave here for testing.
    // return [
    //     "1-9-1-10",
    //     "9-1-10-1",
    //     "9-19-10-19", 
    //     "19-9-19-10"
    // ];

    // console.log("Generating walls.");

    // Squares per side has quadratic relationship with wall/corner requirements.
    const numberOfCorners = Math.ceil(Math.pow((this.squaresPerSide / 10), 2));
    const numberOfWalls = Math.ceil(Math.pow((this.squaresPerSide / 5), 2));

    const gen = () => Math.floor(Math.random() * this.squaresPerSide);
    const edges = [];

    // DO NUMBER OF CORNERS FIRST AFTER TESTING
    for (let n = 0; n < numberOfWalls; n++) {
        const ri = gen();
        const rj = gen();

        const isHorizontal = Math.random() < 0.5;
        const isBackward = Math.random() < 0.5;

        let i1, j1, i2, j2;

        if (isHorizontal) {
            i1 = isBackward ? ri - 1 : ri;
            i2 = isBackward ? ri : ri + 1;

            j1 = rj;
            j2 = rj;
        } else {
            i1 = ri;
            i2 = ri;

            j1 = isBackward ? rj - 1 : rj;
            j2 = isBackward ? rj : rj + 1;
        }

        const edge = `${i1}-${j1}-${i2}-${j2}`;

        if (edges.includes(edge)) {
            n--;
        } else {
            edges.push(edge);
        }
    }

    return edges;
};

// Game.prototype.getWinState = function() {
//     // const gen = () => Math.floor(Math.random() * this.squaresPerSide);

//     return { i: 0, j: 0, id: this.TEMP_ROBOTS[0].id };
// };

// // Game.prototype.onGuess = function(guess) {
// //     return new Promise((resolve, reject) => {
// //         const timeIsUp = () => {
// //             this.guess = Infinity;
// //             resolve();
// //         };

// //         if (guess < 1) {
// //             reject(`${guess} is less than 1.`);
// //             return;
// //         }

// //         if (guess >= this.guess) {
// //             reject(`${guess} is greater than ${this.guess}.`);
// //             return;
// //         }

// //         this.guess = guess;
        
// //         clearTimeout(this.countdownTimer);
// //         this.countdownTimer = setTimeout(timeIsUp, 5 * 1000);
// //     });
// // };

// Game.prototype.onSolve = function(rawMoveStack) {
//     const sanitizedStack = rawMoveStack.map(move => {
//         const sanitizedRobotId = move.id.replace(/[^0-9a-zA-Z]/g, '');
//         const sanitizedI = move.i * 1;
//         const sanitizedJ = move.j * 1;

//         return {
//             i: sanitizedI,
//             j: sanitizedJ,
//             id: sanitizedRobotId
//         };
//     });

//     this.winningStack = sanitizedStack;
//     return sanitizedStack;
// }

// onMessage: (ws, json) => {
//         const message = JSON.parse(json);

//         DEBUG && console.log('Received message: ');
//         DEBUG && console.log(message);

//         if (!message.type) {
//             DEBUG && console.warn("Unprocessable message: ")
//             DEBUG && console.warn(message);
//             return;
//         }

//         switch (message.type) {
//             case 'robots':
//                 Server.messageAll({ type: 'robots', body: G.getRobots()});
//                 break;
//             case 'skip':
//                 Server.messageAll({ type: 'start' });
//                 break;
//             case 'solve':
//                 const sanitizedStack = G.onSolve(message.rawBody);

//                 Server.messageAll(ws, { type: 'countdown', body: { id: ws.id, stack: sanitizedStack } });
//                 break;
//             case 'start':
//                 Server.messageAll({ type: 'start' });
//                 break;
//             case 'stop':
//                 Server.messageAll({ type: 'stop' });
//                 break;
//             case 'walls':
//                 Server.messageAll({ type: 'walls', body: G.getWalls()});
//                 break;
//             default:
//                 console.warn("Unknown message type: ", message.head.type)
//         }
//     },

module.exports = Ricochet;