-- Ground slam: heavy AoE attack around the combatant
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 = 0.7
  self.damageDealt = false
  self.range = 80
  self.multiplier = 2.5
  combatant.skillAnimation = "skill"
  return self
end

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

  if not self.damageDealt and self.timer >= 0.3 then
    self.damageDealt = true
    local ex = self.combatant.x + self.combatant.width / 2
    local ey = self.combatant.y + self.combatant.height / 2
    local opponents = self:getOpponents()

    for _, target in ipairs(opponents) do
      local tx = target.x + target.width / 2
      local ty = target.y + target.height / 2
      local dist = math.sqrt((tx - ex) ^ 2 + (ty - ey) ^ 2)
      if dist <= self.range then
        local damage = self:calcDamage(self.combatant, target)
        if damage > 0 then
          target:damage(damage)
          local dir = (tx - ex) > 0 and 1 or -1
          target:knockback(dir, 250)
        end
      end
    end
  end

  if self.timer >= self.duration then
    self.finished = true
    self.combatant.skillAnimation = nil
    return true
  end
  return false
end

function Skill:calcDamage(source, target)
  return BaseSkill.calcDamage(self, source, target)
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(0.6, 0.4, 0.2, alpha * 0.5)
  love.graphics.circle("fill", ex, ey, self.range * (self.timer / 0.3 > 1 and 1 or self.timer / 0.3))
  love.graphics.setColor(1, 1, 1, 1)
end

return Skill