-- baseworld.lua :: the base world object, that contain just a fast implementation
-- of a 2D world. It doesn't support collision and stuff.

--[[
  Copyright © 2019 Kazhnuz

  Permission is hereby granted, free of charge, to any person obtaining a copy of
  this software and associated documentation files (the "Software"), to deal in
  the Software without restriction, including without limitation the rights to
  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  the Software, and to permit persons to whom the Software is furnished to do so,
  subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
]]

local cwd   = (...):gsub('%.baseworld$', '') .. "."

local BaseWorld = Object:extend()

local Sti   = require(cwd .. "libs.sti")

-- INIT FUNCTIONS
-- All functions to init the world and the map

function BaseWorld:new(scene, actorlist, mapfile)
  self.scene = scene

  self:initPlayers()
  self:setActorList(actorlist)
  self:setMap(mapfile)
  self.actors = {}
end

function BaseWorld:setActorList(actorlist)
  if actorlist == nil then
    error("FATAL: You must set an actorlist to your world")
  else
    self.obj = require(actorlist)
  end
end

function BaseWorld:setMap(mapfile)
  if mapfile == nil then
    self.haveMap = false
    self.haveBackgroundColor = false
    self.backcolor = {128, 128, 128}
  else
    self.haveMap = true
    self.map        = Sti(mapfile)
    self.haveBackgroundColor = true
    self.backcolor  = self.map.backgroundcolor or {128, 128, 128}
  end
end

-- ACTOR MANAGEMENT FUNCTIONS
-- Basic function to handle actors

function BaseWorld:newActor(name, x, y)
  self.obj.index[name](self, x, y)
end

function BaseWorld:registerActor(actor)
  table.insert(self.actors, actor)
end

function BaseWorld:removeActor(actor)
  for i,v in ipairs(self.actors) do
    if v == actor then
      table.remove(self.actors, i)
    end
  end
end

function BaseWorld:moveActor(actor, x, y, filter)
  actor.x = x
  actor.y = y
  -- as the baseworld have no collision function, we return empty collision
  -- datas, but from the same type than bump2D will return
  return x, y, {}, 0
end

function BaseWorld:queryRect(x, y, w, h)
  local query = {}
  local x2, y2 = x + w, y + h
  for i,v in ipairs(self.actors) do
    if (v.x >= x) and (v.x + v.w >= x1) and
       (v.y >= y) and (v.y + v.h >= y1) then

      table.insert(query, v)
    end
  end

  return v
end

function BaseWorld:countActors()
  return #self.actors
end

function BaseWorld:getActors()
  return self.actors
end

-- PLAYER MANAGEMENT FUNCTIONS
-- Basic function to handle player actors

function BaseWorld:initPlayers()
  self.players = {}
end

function BaseWorld:addPlayer(actor, sourceid)
  local player = {}
  player.actor    = actor
  player.sourceid = sourceid or 1

  table.insert(self.players, player)
end

function BaseWorld:sendInputToPlayers(actor)
  for i,v in ipairs(self.players) do
    --TODO: make the player get from a selected source inputs
    local keys = self.scene.sources[v.sourceid].keys
    v.actor:getInput(keys)
  end
end

function BaseWorld:removePlayer(actor)
  for i,v in ipairs(self.players) do
    if (v.actor == actor) then
      table.remove(self.players, i)
    end
  end
end

-- MAP FUNCTIONS
-- All map wrappers

function BaseWorld:getDimensions()
  if self.haveMap then
    return  self.map.width  * self.map.tilewidth,
            self.map.height * self.map.tileheight
  else
    return core.screen:getDimensions()
  end
end

function BaseWorld:setBackgroundColor(r, g, b)
  self.backcolor = {r, g, b}
  self.haveBackgroundColor = true
end

function BaseWorld:removeBackgroundColor()
  self.haveBackgroundColor = false
end

function BaseWorld:getBackgroundColor()
  return self.backcolor[1]/256, self.backcolor[2]/256, self.backcolor[3]/256
end

-- UPDATE FUNCTIONS
-- All update functions

function BaseWorld:update(dt)
  self:updateMap(dt)
  self:sendInputToPlayers(dt)
  self:updateActors(dt)
end

function BaseWorld:updateActors(dt)
  for i,v in ipairs(self.actors) do
    v:update(dt)
  end
end

function BaseWorld:updateMap(dt)
  if self.haveMap then
    self.map:update(dt)
  end
end


-- DRAW FUNCTIONS
-- All function to draw the map, world and actors

function BaseWorld:draw(dt)
  self:drawBackgroundColor()
  self:drawMap()
  self:drawActors()
end

function BaseWorld:drawActors()
  for i,v in ipairs(self.actors) do
    v:draw()
  end
end

function BaseWorld:drawMap()
  if self.haveMap then
    self.map:draw()
  end
end

function BaseWorld:drawBackgroundColor()
  if self.haveBackgroundColor then
    local r, g, b = self.backcolor[1], self.backcolor[2], self.backcolor[3]
    love.graphics.setColor(r/256, g/256, b/256)
    love.graphics.rectangle("fill", 0, 0, 480, 272)
    utils.graphics.resetColor()
  end
end

return BaseWorld