-- Health potion: restore health
local BaseSkill = require("skills.base")
local Skill = {}
Skill.__index = Skill
setmetatable(Skill, { __index = BaseSkill })

function Skill:new(asset, combatant)
  self = setmetatable(BaseSkill:new(asset, combatant), Skill)
  self.duration = 0.4
  self.used = false

  return self
end

function Skill:update(dt)
  self.timer = self.timer + dt

  if not self.used then
    self.used = true
    local actualHeal = math.min(self.power or 1, self.combatant.maxHealth - self.combatant.health)
    self.combatant:heal(actualHeal)
    Sound.play("potion")
  end

  if self.timer >= self.duration then
    return true
  end
  return false
end

function Skill:draw()
  local alpha = 1 - (self.timer / self.duration)
  local ex = self.combatant.x + self.combatant.width / 2
  local ey = self.combatant.y + self.combatant.height / 2

  love.graphics.setColor(0.2, 0.8, 0.2, alpha * 0.6)
  love.graphics.circle("fill", ex, ey, 16 + self.timer * 20)
  love.graphics.setColor(1, 1, 1, 1)
end

return Skill