-- Shield bash: defensive skill that damages nearest opponent
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.damageDealt = false
  self.range = 30
  self.multiplier = 0.8
  combatant.skillAnimation = "skill"
  self.shieldImage = asset.imageLoader("shield")

  self.hitTargets = {}
  local opponents = self:getOpponents()
  for _, t in ipairs(opponents) do
    if self:isInFront(t, self.range) then
      table.insert(self.hitTargets, t)
    end
  end
  Sound.play("shield_bash")

  return self
end

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

  self.combatant.velX = self.combatant.velX / 10

  if not self.damageDealt then
    self.damageDealt = true
    for _, t in ipairs(self.hitTargets) do
      local damage = self:calcDamage(self.combatant, t)
      if damage > 0 then
        t:damage(damage)
        t:knockback(self.combatant.facing, 220)
        if t.behavior then
          t.behavior.disableTimer = .75
        end
      end
    end
  end

  if self.timer >= self.duration then
    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 dir = self.combatant.facing
  local ex = self.combatant.x + (math.min(0, self.timer - .1) * 60 * dir) + ((dir == 1 and self.combatant.width) or 0)
  local ey = self.combatant.y

  --love.graphics.setColor(1, 1, 1, alpha)
  love.graphics.draw(
    self.shieldImage,
    ex, ey, 0, dir, 1
  )
  --love.graphics.setColor(1, 1, 1, 1)
end

return Skill