local tilesheet = require "lib.tilesheet"
local utf8 = require "utf8"
local utility = require "lib.utility"

local window_width, window_height = love.graphics.getDimensions()

local tiles, tiles_json, tile_image
local current_text = ""

local get_tile_usage = function(tiles_json, tile_image)
  local image_width, image_height = tile_image:getDimensions()
  local tile_usage = {}
  for x = 1, image_width / tiles_json.tile_size do
    tile_usage[x] = {}
    for y = 1, image_height / tiles_json.tile_size do
      tile_usage[x][y] = false
    end
  end

  for name, tile_data in pairs(tiles_json.tiles) do
    tile_usage[tile_data.x][tile_data.y] = true
  end

  return tile_usage
end

function love.load()
  love.keyboard.setKeyRepeat(true)
end

function love.draw()
  love.graphics.printf("Prompt:", 0, 0, window_width)
  love.graphics.printf(current_text, 0, 20, window_width) -- lazy magic numbers
end

function love.textinput(character)
  current_text = current_text .. character
end

function love.keypressed(key)
  if key == "escape" then
    love.event.quit()
  elseif key == "backspace" then
    local byteoffset = utf8.offset(current_text, -1)
    if byteoffset then
      current_text = current_text:sub(1, byteoffset - 1)
    end
  elseif key == "enter" then
    -- TODO end of a textinput; what to do depends on what was being asked
  end
end

function love.filedropped(file_path)
  if file_path:sub(-5) == ".json" then
    tiles_json = utility.load_data(file_path)
    tiles, tile_image = tilesheet(tiles_json)
  else
    tiles_json = {
      image_path = file_path,
    }
    tiles, tile_image = tilesheet(file_path)
  end
end