local Battler = require("scenes.battlesystem.actors.battler")
local Hero = Battler:extend()

local gui         = require "game.modules.gui"

-- INIT FUNCTIONS
-- Initialize the hero

function Hero:new(world, x, y, charid, charnumber)
  Hero.super.new(self, world, x, y, 0)
  self.isHero     = true
  self.turnAction = nil
  self.startx, self.starty = self.x, self.y
  self.dx, self.dy = self.x, self.y
  self.direction = 1
  self.directionPrevious = 1

  if charid == nil then
    core.debug:error("FATAL ERROR: charid not set")
  end
  self.charid     = charid
  self.charnumber = charnumber or 1

  self.actionPerTurn = game.characters.list[self.charid].turns

  self:initSprite()
end

-- INFO FUNCTIONS
-- All functions to get information from the character

function Hero:getStats()
  return game.characters.list[self.charid].stats
end

-- ACTIVITY FUNCTION
-- Function to set or unset activity to the character

function Hero:setActive()
  core.debug:print("cbs/hero", "hero " .. self.charid .. " is now active")
  local gridsize = game.characters.list[self.charid].move
  if (gridsize == nil) then
    gridsize = 3
    core.debug:warning("cbs/character", "move value is nil")
  end
  self.world.cursor:setGrid(self.x, self.y, "circle", gridsize, 1, self)
  self.startx, self.starty = self.x, self.y
  self.world.cursor:set(self.startx, self.starty)
  self.currentAction = "selectDirection"

  self.directionPrevious = self.direction
end

-- UPDATE FUNCTION
-- Update the hero

function Hero:update(dt)
  self:updateSprite(dt)

  self.keys = self.scene:getKeys(1)
  if (self.currentAction == "moving") then
    self:updateMoving(dt)
  elseif (self.currentAction == "selectAttack") then
    self:updateActionSelection(dt)
  elseif (self.currentAction == "selectDirection") then
    self:updateDirectionSelection(dt)
  end
end

function Hero:updateMoving(dt)
  -- Store previous position, in order to be able to go back here more easily
  -- when needed
  self.xprevious = self.x
  self.yprevious = self.y

  -- Move the player toward its destination
  self.x = (self.x) + ((self.dx) - (self.x)) * dt*10
  self.y = (self.y) + ((self.dy) - (self.y)) * dt*10

  -- Calculate speed to calculate animation speed
  local xspeed, yspeed  = math.abs(self.x - self.xprevious),
                          math.abs(self.y - self.yprevious)

  local speed = math.sqrt(xspeed*xspeed + yspeed*yspeed) * 32
  self:setCustomSpeed(speed * 10)

  -- Handle direction
  local direction = utils.math.sign(self.x - self.xprevious)
  if direction ~= 0 then
    self.direction = direction
  end

  -- If the hero is near enough its final destination, switch to
  -- action selection
  if (math.abs(self.x - self.dx) < 0.01) and (math.abs(self.y - self.dy) < 0.01) then
    self.x = self.dx
    self.y = self.dy
    self:changeAnimation("idle")
    self.currentAction = "selectAttack"
    self.scene.menu:set( self )
  end
end

function Hero:updateActionSelection(dt)
  -- Change direction by pressing left or right when selecting the next action
  if (self.keys["left"].isPressed) then
    self.direction = -1
  elseif (self.keys["right"].isPressed) then
    self.direction = 1
  end
end

function Hero:updateDirectionSelection(dt)
  self.xprevious = self.x
  self.yprevious = self.y

  self.x = (self.x) + ((self.startx) - (self.x)) * dt*10
  self.y = (self.y) + ((self.starty) - (self.y)) * dt*10

  local xspeed, yspeed  = math.abs(self.x - self.xprevious),
                          math.abs(self.y - self.yprevious)

  local speed = math.sqrt(xspeed*xspeed + yspeed*yspeed) * 32
  self:setCustomSpeed(speed * 10)
  local direction = utils.math.sign(self.x - self.xprevious)
  if direction ~= 0 then
    self.direction = direction
  end

  if (math.abs(self.x - self.startx) < 0.01) and (math.abs(self.y - self.starty) < 0.01) then
    self.x = self.startx
    self.y = self.starty
    self:changeAnimation("idle")
    self.direction = self.directionPrevious
  end
end

-- SIGNAL FUNCTIONS
-- All functions related to signal receiving

function Hero:receiveSignal(action_type, id)
  if id == nil then
    core.debug:print("battler/hero", "action selected : " .. action_type)
  else
    core.debug:print("battler/hero", "action selected : " .. action_type .. " (" .. id .. ")")
  end
  if (action_type == "defend") then
    self.turnAction = "defend"
    self.world:switchActiveBattler( )
  elseif (action_type == "attack") then
    self:changeAnimation("hit1")
  else
    self.world:switchActiveBattler( )
  end
end

function Hero:receiveBackSignal()
  self.currentAction = "selectDirection"
  self.world.cursor:set(self.x, self.y)
  self:changeAnimation("walk")
end

-- ACTION FUNCTIONS
-- All functions related to actions

function Hero:validateAction()
  if (self.currentAction == "selectDirection") then
    self:changeAnimation("walk", true)
    self.currentAction = "moving"
    self.dx, self.dy = self.world.cursor.x, self.world.cursor.y

    self.world.cursor:unset( )
  end
end

-- SPRITE FUNCTIONS
-- Handle the hero sprite

function Hero:initSprite()
  self.assets:addSprite(self.charid, "datas/gamedata/characters/" .. self.charid .. "/sprites")
  self.assets.sprites[self.charid]:setCustomSpeed(16)
  self:setSprite(self.charid, 32, 48, true)
  self:cloneSprite()
  self:changeAnimation("idle")
end

function Hero:animationEnded(animation)
  if (animation == "hit1") then
    self:changeAnimation("hit2")
  elseif (animation == "hit2") then
    self:changeAnimation("hit3")
  elseif (animation == "hit3") then
    core.debug:print("cbs/hero", "normal combo finished, switching actor")
    self:changeAnimation("idle")
    self.world:switchActiveBattler( )
  end
end

-- DRAW FUNCTIONS
-- Draw everything related to the hero

function Hero:draw()
  x, y = self.maputils.gridToPixel(self.x, self.y, true)
  --love.graphics.rectangle("fill", x - 8, y - 32, 16, 32)
  self:drawSprite()
end

function Hero:drawIcon(x, y)
  local iconID = 1
  self.assets.tileset["charicons"]:drawTile(iconID, x, y)
end

function Hero:drawHUD()
  local HUDBASE = 8
  local HUDSEP  = 152
  local x = HUDBASE + (self.charnumber-1)*HUDSEP
  local y = 36

  self.assets.images["e_speedster"]:draw(x, y)
  love.graphics.setScissor(x, y-16, 32, 40)
  self.assets.sprites[self.charid]:drawAnimation(x+14, y+14)
  love.graphics.setScissor( )
  self.assets.images["m_speedster"]:draw(x, y)
  self.assets.images["statusbar"]:draw(x+12, y-6)

  local hp = game.characters.list[self.charid].stats.hp
  local pp = game.characters.list[self.charid].stats.pp
  local hpmax = game.characters.list[self.charid].stats.hpmax
  local ppmax = game.characters.list[self.charid].stats.ppmax

  local bar1 = math.floor((hp/hpmax)*107)
  local bar2 = math.floor((pp/ppmax)*108)

  love.graphics.setColor(248/255, 160/255, 0, 1)
  gui.drawBar(x+29, y+5, bar1, 7)
  love.graphics.setColor(0, 248/255, 248/255, 1)
  gui.drawBar(x+17, y+17, bar2, 7)
  utils.graphics.resetColor()

  self.assets.fonts["hudnbrs_small"]:set()
  love.graphics.print(hp .. "/" .. hpmax, x+34, y+5)
  love.graphics.print(pp .. "/" .. ppmax, x+28, y+17)

  local lvl = game.characters.list[self.charid].stats.level

  if lvl < 100 then
    lvl = "0" .. lvl
  end

  love.graphics.print(lvl, x+122, y-5)
end

return Hero