-- Chase behavior: chase nearest opposing team member and attack when in range
local BaseBehavior = require("behaviors.base")
local Behavior = {}
Behavior.__index = Behavior
setmetatable(Behavior, { __index = BaseBehavior })

function Behavior:new(combatant, context)
  self = setmetatable(BaseBehavior:new(combatant), Behavior)
  self.attackRange = self.combatant.config.attackRange or 24
  self.chaseRange = self.combatant.config.chaseRange or 200
  self.attackSkill = self.context.assetLoader:loadSkill("attack")
  return self
end

function Behavior:update(dt)
  if not self:checkDisable(dt) then
    local opponents = self:getOpponents()
    local nearest = nil
    local nearestDist = math.huge
    for _, opp in ipairs(opponents) do
      local dx = (opp.x + opp.width / 2) - (self.combatant.x + self.combatant.width / 2)
      local dy = (opp.y + opp.height / 2) - (self.combatant.y + self.combatant.height / 2)
      local dist = math.sqrt(dx * dx + dy * dy)
      if dist < nearestDist then
        nearestDist = dist
        nearest = opp
      end
    end
    if not nearest then return end

    local dx = nearest.x - self.combatant.x
    local dy = nearest.y - self.combatant.y

    if self.combatant.knockbackTimer <= 0 then
      if nearestDist > self.attackRange then
        if dx > self.attackRange then
          self.combatant.moveX = 1
          self.combatant.facing = 1
        elseif dx < -self.attackRange then
          self.combatant.moveX = -1
          self.combatant.facing = -1
        end
      else
        self.combatant.moveX = 0
        if dx > 0 then
          self.combatant.facing = 1
        elseif dx < 0 then
          self.combatant.facing = -1
        end
      end
    end
    if self.combatant.knockbackTimer <= 0 and dy < -self.combatant.height and self.combatant.grounded then
      self.combatant.velY = Config.JUMP_SPEED
    end

    if nearestDist <= self.attackRange then
      self.combatant:activateSkill(self.attackSkill, opponents, {})
    end

    -- Animation: skill > charging > jump > walk > idle
    local targetAnim = "idle"
    if self.combatant.moveX ~= 0 or self.spawnTimer > 0 then targetAnim = "walk" end
    if not self.combatant.grounded then targetAnim = "jump" end
    if self.combatant.skillAnimation then targetAnim = self.combatant.skillAnimation end
    self.combatant.sprite:setAnimation(targetAnim)
  end
end

function Behavior:draw()
  local oy = self.combatant.visualOffsetY or 0
  self.combatant:drawSprite()
  if self.combatant.health < self.combatant.maxHealth then
    self.combatant:drawHealthBar(self.combatant.x, self.combatant.y + oy - 5, self.combatant.width, 3, { 0.8, 0.2, 0.2 })
  end
end

return Behavior