-- HUD: handler for ingame hud
HUD = {}
HUD.__index = HUD

function HUD:new(assetLoader, players)
  self = setmetatable({}, HUD)
  self.assetLoader = assetLoader
  self.players = players
  self.y = Config.ROOM_H - 2
  self.h = Config.SCREEN_H - Config.ROOM_H + 2

  self.playerIconSprites = {}
  self.playerSkillData = {}
  return self
end

function HUD:update(dt)
end

function HUD:draw()
  self:drawBackground()

  for i, player in ipairs(self.players) do
    self:drawPlayerHUD(i, 8 + ((i - 1) * 72), self.y)
  end
end

function HUD:getIconSprite(image)
  if not image then return nil end
  local sprite = Sprite:new(image, {
    size = { image:getWidth(), image:getHeight() },
    animations = { default = { 1 } }
  })
  sprite:setAnimation("default")
  return sprite
end

function HUD:drawBackground()
  love.graphics.setColor(0.15, 0.15, 0.2, 1)
  love.graphics.rectangle("fill", 0, self.y, Config.SCREEN_W, self.h)

  love.graphics.setColor(0.4, 0.4, 0.5, 1)
  love.graphics.line(0, self.y, Config.SCREEN_W, self.y)

  love.graphics.setColor(1, 1, 1, 1)
end

function HUD:drawSkill(asset, x, y, remainingCooldown, totalCooldown)
  local image = asset and (asset.icon or asset.drop)

  local width = (image and image:getWidth()) or 16
  local height = (image and image:getHeight()) or 16
  love.graphics.setColor(.24, .24, .34, 1)
  love.graphics.rectangle("fill", x - 1, y - 1, width + 2, height + 2, 2, 2)
  love.graphics.setColor(.21, .21, .30, 1)
  love.graphics.rectangle("fill", x, y, width, height, 2, 2)
  love.graphics.setColor(1, 1, 1, 1)

  if image then
    local alpha = 1
    if totalCooldown and totalCooldown > 0 and remainingCooldown and remainingCooldown > 0 then
      alpha = 0.3 + 0.7 * (1 - remainingCooldown / totalCooldown)
      love.graphics.setColor(alpha, alpha, alpha, 1)
      love.graphics.draw(image, x, y)
      love.graphics.setColor(1, 1, 1, 1)
      local count = math.ceil(remainingCooldown)
      if count > 0 then
        Utils.printWithShadow(tostring(count), x + 4, y + 3)
      end
    else
      love.graphics.draw(image, x, y)
    end
  end
end

function HUD:drawPlayerHUD(playerIndex, x, y)
  local combatant = self.players[playerIndex]

  -- player color
  love.graphics.setColor(Config.PLAYER_COLORS[playerIndex][1], Config.PLAYER_COLORS[playerIndex][2],
    Config.PLAYER_COLORS[playerIndex][3],
    1)
  love.graphics.circle("fill", x + 4, y + 6, 3, 8)
  love.graphics.setColor(1, 1, 1, 1)

  -- hp
  Utils.printWithShadow(tostring(combatant.health or 1) .. "/" .. tostring(combatant.maxHealth), x + 14,
    y + 2)

  -- charge skill
  local chargeAsset = combatant.skillAssets[PlayerSkillSlot.CHARGE]
  local chargeTotalCooldown = chargeAsset.config.cooldown or 1.0
  local chargeRemainingCooldown = combatant.skillCooldowns[chargeAsset.name]
  self:drawSkill(chargeAsset, x + 4, y + 15, chargeRemainingCooldown, chargeTotalCooldown)

  -- weapon
  self:drawSkill(combatant.weapon, x, y + 11)

  -- defensive skill
  local defensiveAsset = combatant.skillAssets[PlayerSkillSlot.DEFENSIVE]
  local defensiveTotalCooldown = defensiveAsset.config.cooldown or 1.0
  local defensiveRemainingCooldown = combatant.skillCooldowns[defensiveAsset.name]
  self:drawSkill(defensiveAsset, x + 24, y + 15, defensiveRemainingCooldown, defensiveTotalCooldown)

  -- item
  self:drawSkill(combatant.skillAssets[PlayerSkillSlot.CONSUMABLE], x + 44, y + 15)
end