/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1");

/**** 
* Classes
****/ 
// Enemy class (moves left/right)
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var en = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3 + Math.random() * 2;
	self.direction = Math.random() < 0.5 ? 1 : -1;
	self.range = 300 + Math.random() * 200;
	self.originX = 0;
	self.update = function () {
		self.x += self.speed * self.direction;
		if (Math.abs(self.x - self.originX) > self.range) {
			self.direction *= -1;
		}
	};
	return self;
});
// Football class (follows player or can be dropped)
var Football = Container.expand(function () {
	var self = Container.call(this);
	var fb = self.attachAsset('football', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.carried = true;
	self.vx = 0;
	self.vy = 0;
	self.update = function () {
		if (!self.carried) {
			// Gravity
			self.vy += 2.5;
			self.x += self.vx;
			self.y += self.vy;
			// Collide with platforms
			for (var i = 0; i < platforms.length; ++i) {
				var p = platforms[i];
				if (self.intersects(p) && self.vy > 0) {
					self.y = p.y - p.height / 2 - self.height / 2;
					self.vy = 0;
				}
			}
			// Clamp to ground
			if (self.y > 2732 - 40) {
				self.y = 2732 - 40;
				self.vy = 0;
			}
		}
	};
	return self;
});
// Goal class
var Goal = Container.expand(function () {
	var self = Container.call(this);
	var g = self.attachAsset('goal', {
		anchorX: 0.5,
		anchorY: 1
	});
	return self;
});
// Hazard class
var Hazard = Container.expand(function () {
	var self = Container.call(this);
	var hz = self.attachAsset('hazard', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});
// Platform class
var Platform = Container.expand(function () {
	var self = Container.call(this);
	var plat = self.attachAsset('platform', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var pl = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.vx = 0;
	self.vy = 0;
	self.onGround = false;
	self.carrying = true;
	self.update = function () {
		// Apply gravity
		self.vy += 3.5;
		// Move
		self.x += self.vx;
		self.y += self.vy;
		// Clamp to world bounds
		if (self.x < self.width / 2) self.x = self.width / 2;
		if (self.x > 2048 - self.width / 2) self.x = 2048 - self.width / 2;
		if (self.y > 2732 - 40) {
			self.y = 2732 - 40;
			self.vy = 0;
			self.onGround = true;
		}
		// Collide with platforms
		self.onGround = false;
		for (var i = 0; i < platforms.length; ++i) {
			var p = platforms[i];
			if (self.intersects(p) && self.vy > 0) {
				self.y = p.y - p.height / 2 - self.height / 2;
				self.vy = 0;
				self.onGround = true;
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222244
});

/**** 
* Game Code
****/ 
// Football (ellipse), Player (box), Enemy (box), Platform (box), Goal (box), Hazard (box)
// Level data (platforms, hazards, enemies)
var level = 1;
if (storage.level) level = storage.level;
var platforms = [];
var hazards = [];
var enemies = [];
var player = null;
var football = null;
var goal = null;
var dragging = false;
var dragStartX = 0;
var dragStartY = 0;
var moveDir = 0; // -1 left, 1 right, 0 none
var jumpQueued = false;
var infoText = null;
var levelText = null;
var carryingBall = true;
var canPickupBall = false;
var lastGoalIntersect = false;
var lastEnemyIntersect = false;
var lastHazardIntersect = false;
var lastFootballIntersect = false;
var lastFootballGoalIntersect = false;
var lastFootballHazardIntersect = false;
var lastFootballEnemyIntersect = false;
// GUI: Level display
levelText = new Text2('Level ' + level, {
	size: 90,
	fill: '#fff'
});
levelText.anchor.set(0.5, 0);
LK.gui.top.addChild(levelText);
// GUI: Info text
infoText = new Text2('', {
	size: 70,
	fill: '#fff'
});
infoText.anchor.set(0.5, 0);
LK.gui.bottom.addChild(infoText);
// Helper: Reset level
function setupLevel() {
	// Clear old
	for (var i = 0; i < platforms.length; ++i) platforms[i].destroy();
	for (var i = 0; i < hazards.length; ++i) hazards[i].destroy();
	for (var i = 0; i < enemies.length; ++i) enemies[i].destroy();
	if (player) player.destroy();
	if (football) football.destroy();
	if (goal) goal.destroy();
	platforms = [];
	hazards = [];
	enemies = [];
	player = null;
	football = null;
	goal = null;
	carryingBall = true;
	canPickupBall = false;
	lastGoalIntersect = false;
	lastEnemyIntersect = false;
	lastHazardIntersect = false;
	lastFootballIntersect = false;
	lastFootballGoalIntersect = false;
	lastFootballHazardIntersect = false;
	lastFootballEnemyIntersect = false;
	// Level layout
	// Start platform
	var plat = new Platform();
	plat.x = 200;
	plat.y = 2500;
	game.addChild(plat);
	platforms.push(plat);
	// Middle platforms
	var platCount = 4 + level;
	for (var i = 0; i < platCount; ++i) {
		var p = new Platform();
		p.x = 400 + i * 350 + Math.random() * 80;
		p.y = 2500 - i * 350 + Math.random() * 60;
		game.addChild(p);
		platforms.push(p);
		// Hazards
		if (level > 1 && Math.random() < 0.4) {
			var hz = new Hazard();
			hz.x = p.x + (Math.random() < 0.5 ? -1 : 1) * 100;
			hz.y = p.y - 40;
			game.addChild(hz);
			hazards.push(hz);
		}
		// Enemies
		if (level > 1 && Math.random() < 0.5) {
			var en = new Enemy();
			en.x = p.x;
			en.y = p.y - 100;
			en.originX = en.x;
			game.addChild(en);
			enemies.push(en);
		}
	}
	// Goal
	goal = new Goal();
	goal.x = platforms[platforms.length - 1].x + 300;
	goal.y = platforms[platforms.length - 1].y - 60;
	game.addChild(goal);
	// Player
	player = new Player();
	player.x = plat.x;
	player.y = plat.y - 120;
	game.addChild(player);
	// Football
	football = new Football();
	football.x = player.x;
	football.y = player.y - 100;
	football.carried = true;
	game.addChild(football);
	// GUI
	levelText.setText('Level ' + level);
	infoText.setText('Drag to move, tap to jump');
}
// Touch controls
game.down = function (x, y, obj) {
	// If tap below half screen, jump
	if (y > 2732 / 2) {
		jumpQueued = true;
		return;
	}
	// Else, drag to move
	dragging = true;
	dragStartX = x;
	dragStartY = y;
	moveDir = 0;
};
game.move = function (x, y, obj) {
	if (dragging) {
		var dx = x - dragStartX;
		if (Math.abs(dx) > 30) {
			moveDir = dx > 0 ? 1 : -1;
		} else {
			moveDir = 0;
		}
	}
};
game.up = function (x, y, obj) {
	dragging = false;
	moveDir = 0;
};
// Main update loop
game.update = function () {
	// Player movement
	if (moveDir !== 0) {
		player.vx = 14 * moveDir;
	} else {
		player.vx *= 0.7;
		if (Math.abs(player.vx) < 1) player.vx = 0;
	}
	// Jump
	if (jumpQueued && player.onGround) {
		player.vy = -55 - 4 * level;
		jumpQueued = false;
	}
	jumpQueued = false;
	// Update player, football, enemies
	player.update();
	football.update();
	for (var i = 0; i < enemies.length; ++i) enemies[i].update();
	// Carry football
	if (football.carried) {
		football.x = player.x;
		football.y = player.y - player.height / 2 - football.height / 2 + 20;
		football.vx = 0;
		football.vy = 0;
	}
	// Football pickup
	var footballNear = player.intersects(football);
	if (!football.carried && footballNear && !carryingBall) {
		carryingBall = true;
		football.carried = true;
		infoText.setText('Ball picked up!');
		tween(infoText, {
			alpha: 0
		}, {
			duration: 1200,
			onFinish: function onFinish() {
				infoText.setText('');
				infoText.alpha = 1;
			}
		});
	}
	// Football drop on enemy/hazard
	var hitEnemy = false;
	for (var i = 0; i < enemies.length; ++i) {
		if (player.intersects(enemies[i]) && football.carried) hitEnemy = true;
	}
	var hitHazard = false;
	for (var i = 0; i < hazards.length; ++i) {
		if (player.intersects(hazards[i]) && football.carried) hitHazard = true;
	}
	if ((hitEnemy || hitHazard) && football.carried) {
		football.carried = false;
		carryingBall = false;
		football.vx = player.vx * 0.7;
		football.vy = -20;
		infoText.setText('You dropped the ball!');
		tween(infoText, {
			alpha: 0
		}, {
			duration: 1200,
			onFinish: function onFinish() {
				infoText.setText('');
				infoText.alpha = 1;
			}
		});
		LK.effects.flashObject(player, 0xff0000, 600);
	}
	// Football collides with hazard/enemy: reset to start
	var fbHitHazard = false;
	for (var i = 0; i < hazards.length; ++i) {
		if (football.intersects(hazards[i]) && !football.carried) fbHitHazard = true;
	}
	var fbHitEnemy = false;
	for (var i = 0; i < enemies.length; ++i) {
		if (football.intersects(enemies[i]) && !football.carried) fbHitEnemy = true;
	}
	if ((fbHitHazard || fbHitEnemy) && !football.carried) {
		// Reset football to start
		football.x = platforms[0].x;
		football.y = platforms[0].y - 100;
		football.vx = 0;
		football.vy = 0;
		infoText.setText('Ball reset!');
		tween(infoText, {
			alpha: 0
		}, {
			duration: 1200,
			onFinish: function onFinish() {
				infoText.setText('');
				infoText.alpha = 1;
			}
		});
	}
	// Win condition: player+football at goal
	var atGoal = player.intersects(goal);
	var fbAtGoal = football.intersects(goal);
	if (atGoal && football.carried && fbAtGoal) {
		// Next level
		infoText.setText('Touchdown! Next level...');
		tween(infoText, {
			alpha: 0
		}, {
			duration: 1200,
			onFinish: function onFinish() {
				infoText.setText('');
				infoText.alpha = 1;
			}
		});
		level += 1;
		storage.level = level;
		LK.setTimeout(setupLevel, 1200);
		return;
	}
	// Lose condition: player falls off
	if (player.y > 2732 - 10) {
		LK.effects.flashScreen(0xff0000, 1000);
		infoText.setText('You fell! Try again.');
		tween(infoText, {
			alpha: 0
		}, {
			duration: 1200,
			onFinish: function onFinish() {
				infoText.setText('');
				infoText.alpha = 1;
			}
		});
		LK.setTimeout(setupLevel, 1200);
		return;
	}
	// Lose condition: football lost off screen
	if (football.y > 2732 - 10) {
		infoText.setText('Ball lost! Try again.');
		tween(infoText, {
			alpha: 0
		}, {
			duration: 1200,
			onFinish: function onFinish() {
				infoText.setText('');
				infoText.alpha = 1;
			}
		});
		LK.setTimeout(setupLevel, 1200);
		return;
	}
};
// Start first level
setupLevel();