-- if love.system.getOS() ~= 'DOS' then
    -- local lick = require "3rd.lick"
    -- lick.updateAllFiles = true
-- end

local platform = require "platform.platform"
require "tilemap"

local bf
local hamsterMouse
local tilemap

local mapX = 0
local mapY = 0
local mapSpeed = 32

local someUnit

local function drawText(str, x, y)
    local font = love.graphics.getFont()
    love.graphics.print(str, x - font:getWidth(str) / 2, y - font:getHeight() / 2)
end

function love.load()
    platform.init()

    math.randomseed(os.time())

    bf = love.graphics.newImageFont("res/font.png",
        " abcdefghijklmnopqrstuvwxyz" ..
        "ABCDEFGHIJKLMNOPQRSTUVWXYZ0" ..
        "123456789.,!?-+/():;%&`'*#=[]\"")
    if love.system.getOS() == 'DOS' then
        hamsterMouse = love.graphics.newImage("res/hammouse.gif")
    else
        hamsterMouse = love.graphics.newImage("res/hammouse.png")
    end

    tilemap = TileMap:new(
        16,
        -- TODO: replace the Kenney tiles
        {
            love.graphics.newImage("res/kenney/t0000.png"),
            love.graphics.newImage("res/kenney/t0001.png"),
            love.graphics.newImage("res/kenney/t0002.png")
        },
        {},
        platform.isNative and "replace" or "fast",
        16 * 5
    )
    tilemap:random(10, 10)

    require "unit"
    someUnit = SomeUnit:new(tilemap, 30, 30)
end

-- 0: nothing
-- 1: holding LMB
-- 2: dragging with LMB held
local mouseState = 0
local mouseStartX = 0
local mouseStartY = 0
local mouseEndX = 0
local mouseEndY = 0

function love.mousepressed(x, y, button)
    if button == 1 then
        if mouseState == 0 then
            mouseState = 1
            mouseStartX = x
            mouseStartY = y
        end
    end
end

function love.mousemoved(x, y, dx, dy)
    if mouseState == 1 then
        mouseState = 2
    end
    -- fallthrough
    if mouseState == 2 then
        mouseEndX = x
        mouseEndY = y
    end
end

function love.mousereleased(x, y, button)
    if button == 1 then
        if mouseState == 1 then
            -- TODO: callback
        elseif mouseState == 2 then
            -- TODO: callback
        end
        mouseState = 0
    end
end

function love.update(dt)
    if love.keyboard.isDown("d") then
        mapX = mapX + mapSpeed * dt
    elseif love.keyboard.isDown("a") then
        mapX = mapX - mapSpeed * dt
    end

    if love.keyboard.isDown("w") then
        mapY = mapY - mapSpeed * dt
    elseif love.keyboard.isDown("s") then
        mapY = mapY + mapSpeed * dt
    end
end

function love.draw()
    platform.drawStart()

    love.graphics.clear()
    love.graphics.setFont(bf)

    tilemap.offsetX = math.floor(mapX)
    tilemap.offsetY = math.floor(mapY)
    -- local time = love.timer.getTime()
    -- tilemap.offsetX = 50 + math.floor(math.cos(time) * 25)
    -- tilemap.offsetY = 50 + math.floor(math.sin(time) * 25)
    tilemap:update()
    -- local tilemapPosX = tilemap.offsetX
    -- local tilemapPosY = tilemap.offsetY
    local tilemapPosX = 10
    local tilemapPosY = 10
    tilemap:draw(tilemapPosX, tilemapPosY)
    love.graphics.setColor(255, 0, 0)
    love.graphics.rectangle("line", tilemapPosX - 1, tilemapPosY - 1, 16 * 5 + 1, 16 * 5 + 1)
    love.graphics.setColor(255, 255, 255)

    someUnit:draw()

    drawText('Hellorld!', 160, 100)

    if mouseState == 2 then
        love.graphics.setColor(0, 255, 255)
        love.graphics.rectangle("line", mouseStartX, mouseStartY, mouseEndX - mouseStartX, mouseEndY - mouseStartY)
        love.graphics.setColor(255, 255, 255)
    end

    love.graphics.draw(hamsterMouse, love.mouse.getX(), love.mouse.getY())

    platform.drawEnd()
end

function love.keypressed(key)
    if key == "space" then
        print("TEST!!")
    end
    if key == "escape" then
        os.exit()
    end
end