---@class Projectile:GameObject
---@field r number
---@field s number|nil
---@field v number|nil
local Projectile = GameObject:extend()

function Projectile:new(area, x, y, opts)
    Projectile.super.new(self, area, x, y, opts)

    -- radius of collider
    self.s = opts.s or 2.5
    -- velocity
    self.v = opts.v or 200
    self.collider = self.area.world:circle(self.x, self.y, self.s)
end

---Updates Projectile
---@param dt number delta time
function Projectile:update(dt)
    Projectile.super.update(self, dt)

    -- update velocity
    --self.v = math.min(self.v + self.a*dt, self.max_v)

    -- update position
    local vx = self.v * math.cos(self.r)  -- velocity X
    local vy = self.v * math.sin(self.r)  -- velocity Y
    self.x = self.x + vx * dt             -- update position X
    self.y = self.y + vy * dt             -- update position Y

    -- move collision area
    self.collider:moveTo(self.x, self.y)
end

---Draws Projectile
function Projectile:draw()
    Projectile.super.draw(self)
    if DEBUG then
        love.graphics.setColor(1, 0, 0)
        self.collider:draw()
    end
    love.graphics.setColor(1, 1, 1)
    love.graphics.circle('fill', self.x, self.y, self.s)
end

return Projectile