--! file enemy.lua
require("blaster")
Enemy = Object:extend()

local fireTime = love.timer.getTime()
local enemyBullets

function Enemy:new(x, y, radius)
	self.origin = { x, y }
	self.image = love.graphics.newImage("/assets/enemy/e-fighter.png")

	self.x = x
	self.y = y
	self.width = self.image:getWidth()
	self.height = self.image:getHeight()

	self.type = "enemy"
	self.health = 10
	self.move_radius = radius
	self.speed = 100
	self.fireRate = 2
	self.destroy = false

	self.bounds = { (self.x + 18), (self.x + 44), (self.y + 20), (self.y + 44) }
	enemyBullets = {}
end

function Enemy:draw()
	--draw stuff
	--love.graphics.rectangle("line", self.x, self.y, self.width, self.height)
	love.graphics.draw(self.image, self.x, self.y, 0, -1)

	for _, v in ipairs(enemyBullets) do
		--love.graphics.circle("fill", v.x, v.y, v.radius)
		v:draw()
	end
end

function Enemy:update(dt, player)
	local game_bounds = { self.origin[1] - self.move_radius, self.origin[1] + self.move_radius }
	local window_height = love.graphics.getHeight()

	self.x = self.x + self.speed * dt

	self.bounds = { (self.x + 18), (self.x + 44), (self.y + 20), (self.y + 44) }
	--movement
	if self.x > game_bounds[2] then
		self.speed = -self.speed
	elseif self.x < game_bounds[1] then
		self.speed = -self.speed
	end

	--firing!
	self:fire()

	for i, v in ipairs(enemyBullets) do
		v:update(dt)

		if v.y > window_height then
			v.destroy = true
		end

		if v.destroy == true then
			print("Enemy Bullet Removed! Bullets in table remaining: ", #enemyBullets)
			table.remove(enemyBullets, i)
		end

		v:checkCollision(player)
	end
	--health check
	if self.health < 0 then
		self.destroy = true
	end
end

--shoot at the player a variable number of seconds
function Enemy:fire()
	if love.timer.getTime() - fireTime > self.fireRate then
		table.insert(enemyBullets, Blaster(self.x, self.y, "enemy"))
		fireTime = love.timer.getTime()
	end
end