local love = assert( love, "This tool requires LOVE: love2d.org" )
--assert( require('mobdebug') ).start() --remote debugger
local map = require 'map.map'
local button = require 'ui.button'
local mainmenu = require 'ui.menu.mainmenu'
local Camera = require 'ui.camera'

function love.load()
  love.filesystem.setIdentity( "dcearth", false )
  love.keyboard.setKeyRepeat( true )
  love.graphics.setNewFont( 14 )
end

function love.directorydropped( path )
  if map.path then 
    assert( love.filesystem.unmount( map.path ) )
    map.loaded = false
  end
  love.filesystem.mount( path, "" )
  return map.load( path )
end

function love.update( dt )
  local tx, ty = 0, 0
  local moveCamera = false
  if love.keyboard.isScancodeDown( "w" ) then moveCamera = true; ty = ty + dt * 150 / Camera.zoom end
  if love.keyboard.isScancodeDown( "a" ) then moveCamera = true; tx = tx - dt * 150 / Camera.zoom end
  if love.keyboard.isScancodeDown( "s" ) then moveCamera = true; ty = ty - dt * 150 / Camera.zoom end
  if love.keyboard.isScancodeDown( "d" ) then moveCamera = true; tx = tx + dt * 150 / Camera.zoom end
  if love.keyboard.isScancodeDown( "q" ) then Camera.Zoom( dt * 400 ) end
  if love.keyboard.isScancodeDown( "e" ) then Camera.Zoom( -dt* 400 ) end
  if moveCamera then Camera.Translate( tx, ty ) end


end

function love.draw()
  if not map.loaded then
    local w, h = love.graphics.getDimensions()
    return love.graphics.printf( "Drag and drop folder to begin.", w / 2 - 200, h / 2 - 128, 400, "center")
  end

  love.graphics.push( "all" )
  map.draw()
  love.graphics.pop()

  mainmenu.draw()
end

function love.resize(w, h)
  Camera.Resize( w, h )
end

function love.wheelmoved(x, y)
  Camera.Zoom( (y > 0) and 3 or -3 )
end

function love.mousepressed( x, y, mouseButton, istouch, presses )
  local wx, wy = Camera.GetWorldCoordinate( x, y )

  return button.mousepressed( x, y )
end

function love.mousemoved( x, y, dx, dy, istouch )
  if not map.loaded then return end
  --mouse over menu
  button.selectIn( x, y )

  --mouse on map
  if map.selectionLocked then return end
  if map.editLayer and map.editLayer.selectNearest then 
    map.selected = map.editLayer:selectNearest( Camera.GetWorldCoordinate( x, y ) )
  end
end

function love.keypressed(key, code, isRepeat)

  if code == "up"   then return button.selectPrev() end
  if code == "down"  then return button.selectNext() end
  if code == "right"   then return button.selectNextInGroup() end
  if code == "left"     then return button.selectPrevInGroup() end
  if code == "return" then return button.selected:callback() end

  if key == "c" then
    map.selectionLocked = not( map.selectionLocked )
  end
end

function love.textinput()
  
end