local gc,fs=love.graphics,love.filesystem

local emptyUser={
    username="Stacker",
    motto="",
    hash="",
    new=false,
}
local defaultAvatar={}
for i=1,29 do
    local img=TEXTURE.miniBlock[i]
    defaultAvatar[i]=GC.DO{128,128,
        {'clear',.1,.1,.1},
        {'draw',img,63,63,.2,30,30,img:getWidth()/2,img:getHeight()/2},
    }
end
local errorAvatar=GC.DO{128,128,
    {'setCL',1,.2,.15},
    {'setLW',10},
    {'line',10,10,117,117},
    {'line',10,117,117,10},
}
local function _loadAvatar(path)
    local success,img=pcall(gc.newImage,path)
    if success then
        local canvas=gc.newCanvas(128,128)
        gc.push()
            gc.origin()
            gc.setColor(1,1,1)
            gc.setCanvas(canvas)
            mDraw(img,64,64,nil,128/math.max(img:getWidth(),img:getHeight()))
            gc.setCanvas()
        gc.pop()
        return canvas
    else
        return errorAvatar
    end
end

local db_img={}
local db=setmetatable({},{__index=function(self,uid)
    if not uid then return emptyUser end
    local file="cache/user"..uid..".dat"
    local d=fs.getInfo(file)and JSON.decode(fs.read(file))or TABLE.copy(emptyUser)
    rawset(self,uid,d)
    db_img[uid]=
        type(d.hash)=='string'and #d.hash>0 and fs.getInfo("cache/"..d.hash)and
        _loadAvatar("cache/"..d.hash)or
        defaultAvatar[(uid-26)%29+1]
    return d
end})

local USERS={}

function USERS.updateUserData(data)
    local uid=data.uid
    db[uid].username=data.username
    db[uid].motto=data.motto
    fs.write("cache/user"..uid..".dat",JSON.encode{
        username=data.username,
        motto=data.motto,
        hash=data.hash or db[uid].hash,
    })
    if data.avatar then
        fs.write("cache/"..data.hash,love.data.decode('string','base64',data.avatar:sub(data.avatar:find(",")+1)))
        db_img[uid]=_loadAvatar("cache/"..data.hash)
        db[uid].hash=type(data.hash)=='string'and #data.hash>0 and data.hash
    end
end

function USERS.getUsername(uid)return db[uid].username end
function USERS.getMotto(uid)return db[uid].motto end
function USERS.getHash(uid)return db[uid].hash or""end
function USERS.getAvatar(uid)
    if uid then
        if not db[uid].new then
            NET.getUserInfo(uid)
            db[uid].new=true
        end
        return db_img[uid]
    else
        return defaultAvatar[1]
    end
end
function USERS.forceFreshAvatar()
    for _,U in next,db do
        U.new=false
    end
end

return USERS