import FPS from './fps.js';

const ONE_SECOND = 1000;
const PRESS_RIPPLE = ONE_SECOND / 3;

const DEFAULTS = {
	board:       Tessellate.BOARD_STYLES.HEX,
	style:       Tessellate.DRAW_STYLES.FILL,
	orientation: Tessellate.ORIENTATION_STYLES.FLAT,
	tile:        Tessellate.TILE_STYLES.HEX,
};

const pressRipple = function() {
	const sinStart = 2 * Math.PI;
	const halfPi = Math.PI / 2;

	return pressFactor => Math.sin(sinStart + (pressFactor * halfPi)) + 1;
}();

const pressFade = function() {
	const halfPi = Math.PI / 2;

	return pressFactor => Math.sin(Math.PI + (pressFactor * halfPi)) + 1;
}();

class Demo {
	constructor() {
		[
			'setOriginTile',
			'setFadeToGray',
			'tap',
			'pressStart',
			'press',
			'createTile',
			'drawTile',
			'draw',
		].map(method => this[method] = this[method].bind(this));

		const queryStringObj = Tessellate.utils.getQueryStringObj();

		this.settings = Object.assign({}, DEFAULTS, queryStringObj);

		this.map = {};
		this.taps = [];
		this.mines = {};
		this.ripples = [];

		this.fps = new FPS({
			element: document.querySelector('#fps'),
		});

		this.setOriginTile();
		this.setFadeToGray();

		this.tessellate = new Tessellate(Object.assign({
			element: '#container',
			tap: this.tap,
			pressStart: this.pressStart,
			press: this.press,
			draw: this.draw,
		}, this.settings));
	}

	setOriginTile() {
		this.map['0,0'] = new Tessellate.Cell({
			x: 0,
			y: 0,
			scale: 1,
			drawStyle: Tessellate.DRAW_STYLES.FILL,
			tileStyle: this.settings.tile,
			orientation: this.settings.orientation,

			color: {
				red: 255,
				green: 255,
				blue: 0,
				alpha: 1,
			}
		});

		Tessellate.utils.rangeInclusive(0, 5)
		.map(interval => interval ? interval * 0.2 : 0.01)
		.forEach(interval => {
			this.taps.push(new Tessellate.Cell({
				x: 0,
				y: 0,
				scale: interval,
				drawStyle: Tessellate.DRAW_STYLES.OUTLINE,
				tileStyle: this.settings.tile,
				orientation: this.settings.orientation,

				color: {
					red: 0,
					green: 0,
					blue: 0,
					alpha: 1,
				},
			}));
		});
	}

	setFadeToGray () {
		window.addEventListener('keydown', event => {
			if (!event.repeat && event.key === 'Enter') {
				this.gray = this.gray ? null : Date.now();
			}
		});
	}

	tap(tap) {
		const {x, y, z} = tap.tile.getPoint();

		const key = `${ x },${ z != null ? z : y }`;

		const pipMax = this.settings.tile === Tessellate.TILE_STYLES.HEX ? 7 : 9;
		this.map[key].pips = Tessellate.utils.random(1, pipMax);
	}

	pressStart(tap) {
		this.ripples.push({
			timestamp: tap.event.timeStampUTC,

			cell: this.createTile({
				x: tap.tile.x,
				y: tap.tile.y,

				scale: 1.0,

				drawStyle: Tessellate.DRAW_STYLES.FILL,
				tileStyle: Tessellate.TILE_STYLES.CIRCLE,
				orientation: Tessellate.ORIENTATION_STYLES.FLAT,

				color: {
					red:   128,
					green: 128,
					blue:  128,
					alpha: 0.5,
				},
			})
		});

		if (tap.event.mobile) {
			this.togglemine(tap.tile)
		}
	}

	press(tap) {
		if (!tap.event.mobile) {
			this.togglemine(tap.tile)
		}
	}

	togglemine(tile) {
		const {x, y, z} = tile.getPoint();
		const key = `${ x },${ z != null ? z : y }`;

		if (this.mines[key]) {
			delete this.mines[key];
		}
		else {
			this.mines[key] = tile;
		}
	}

	createTile({x, y,
		drawStyle, tileStyle, orientation,
		scale = Tessellate.utils.random(7, 9) / 10,
		color = {
			red:   Tessellate.utils.random(255),
			green: Tessellate.utils.random(255),
			blue:  Tessellate.utils.random(255),
			alpha: Tessellate.utils.random(25, 75) / 100,
		}
	}) {

		return new Tessellate.Cell({
			x, y,

			scale,

			drawStyle,
			tileStyle,
			orientation,

			color,
		});
	}

	fadeToGray (tile, fadeFactor) {
		tile.color.grayscale = tile.color.grayscale || Tessellate.utils.grayscale(tile.color);

		const grayscale = tile.color.grayscale;
		const color = {
			red: parseInt(tile.color.red - ((tile.color.red - grayscale) * fadeFactor)),
			green: parseInt(tile.color.green - ((tile.color.green - grayscale) * fadeFactor)),
			blue: parseInt(tile.color.blue - ((tile.color.blue - grayscale) * fadeFactor)),
		};

		tile = Tessellate.utils.extend(tile, {color});

		return tile;
	}

	drawTile({x, y, z}, context, scale) {
		const key = `${ x },${ z != null ? z : y }`;

		this.map[key] = this.map[key] || this.createTile({
			x, y,
			drawStyle: this.settings.style,
			tileStyle: this.settings.tile,
			orientation: this.settings.orientation,
		});

		let tile = this.map[key];
		const pixelPoint = this.tessellate.tileToPixel(x, y, z);

		const fadeFactor = this.gray ? Math.min((Date.now() - this.gray) / 5000, 1) : null;
		tile = this.gray ? this.fadeToGray(tile, fadeFactor) : tile;

		Tessellate.TILES[tile.tileStyle][tile.drawStyle](context, scale, pixelPoint.getX(), pixelPoint.getY(), tile);
		Tessellate.Shapes.pips(context, scale, pixelPoint.getX(), pixelPoint.getY(), tile);
	}

	draw({context, height, width, scale, tilePoints, now, lastNow}) {
		this.fps.frame(now, lastNow);

		Tessellate.Shapes.background(context, height, width, {
			red: 64,
			green: 32,
			blue: 128,
		});

		tilePoints.forEach(tilePoint => this.drawTile(tilePoint, context, scale));

		this.ripples.forEach(({timestamp, cell}) => {
			const pressFactor = Math.min((now - timestamp) / PRESS_RIPPLE, 1);

			Object.assign(cell, {scale: pressRipple(pressFactor)});
			Object.assign(cell.color, {alpha: pressFade(pressFactor)});

			const pixelPoint = this.tessellate.tileToPixel(cell.x, cell.y);
			Tessellate.TILES[cell.tileStyle][cell.drawStyle](context, scale, pixelPoint.getX(), pixelPoint.getY(), cell);
		});
		this.ripples = this.ripples.filter(ripple => (ripple.timestamp + PRESS_RIPPLE) > now);

		this.taps.forEach(cell => {
			const pixelPoint = this.tessellate.tileToPixel(cell.x, cell.y);
			Tessellate.TILES[cell.tileStyle][cell.drawStyle](context, scale, pixelPoint.getX(), pixelPoint.getY(), cell);
		});

		Tessellate.funky.forEach(this.mines, cell => {
			const pixelPoint = this.tessellate.tileToPixel(cell.x, cell.y);
			Tessellate.Shapes.mine(context, scale, pixelPoint.getX(), pixelPoint.getY());
		});
	}
}

let demo = new Demo();