Save

function State:saveEntities()
    for _, entity in pairs(entityManager.entities) do
        if entity.saveEntity then
            entity:saveEntity()
        end
    end
end

---@param file string Where to save the data
function State:save(file, force)
    -- Check if it is possible to save right now
    if action:isProcessWorking() and force ~= true then
        print("saving is not possible now, a action is still working")
        return false
    end

    local data = {}

    -- Create a save state for all entities that are needed
    self:saveEntities()

    -- We don't need all session data.
    -- @warning keep this up to date if you want to add something
    local sessionData = session:getData()
    local validSessionKeyNamePatterns = {
        "^actor-.*",
        "^item-.*",
        "^animation-.*",
        "^scene-.*",
        "action",
        "^entity_delete",
        "^entity_properties",
        "^currentSceneUkey"
    }
    for sessionKeyName, sessionValue in pairs(sessionData) do
        -- I don't know how to create multi patterns ... [x|y] don't work
        local check = false
        for _, pattern in pairs(validSessionKeyNamePatterns) do
            if string.match(sessionKeyName, pattern) ~= nil then
                if self.config.log.state then
                    print("[SESSION.SET." .. sessionKeyName .. "]")
                end
                data[sessionKeyName] = sessionValue
                check = true
                break
            end
        end

        if check == false and self.config.log.state then
            print("[SESSION.INFO." .. sessionKeyName .. "] don't match any save pattern")
        end
    end

    local success, message = love.filesystem.write(file, Serialization.serialize(data))
    if success == false then
        error("Cannot save data, " .. message)
    end
end

---@param file string What file data to load
function State:load(file)
    local data = love.filesystem.read(file)
    if data then
        local results, len = Serialization.deserialize(data)
        -- at the moment we only use one object in each file
        if len == 1 then
            -- set the session data
            session:setData(results[1])
        end
    end
end

-- special function that will execute when saving the game
function Actor:saveEntity()
    -- maybe a extend class did create some data
    local data = session:get("actor-" .. self.ukey) or {}

    data.sceneUkey = self.sceneUkey
    data.lastMove = self.lastMove
    data.movableByUserInput = self.movableByUserInput

    if self.activeFrameset then
        data.startPositionX = self.activeFrameset:getX()
        data.startPositionY = self.activeFrameset:getY()
    end

    -- maybe the actor did change the frameset (using a hat)
    data.frameset = {}
    for index, frameset in pairs(self.frameset) do
        data.frameset[index] = frameset.name
    end

    session:set("actor-" .. self.ukey, data)
end

function Actor:loadEntity()
    local restoreData = session:get("actor-" .. self.ukey)
    if restoreData == nil then
        return
    end

    if restoreData.sceneUkey ~= nil then
        self:setSceneUkey(restoreData.sceneUkey)
    end

    if restoreData.movableByUserInput ~= nil then
        self:setMovableByUserInput(restoreData.movableByUserInput)
    end

    -- maybe the actor did change the frameset (using a hat)
    if restoreData.frameset then
        for index, framesetName in pairs(restoreData.frameset) do
            self:setFrameset(index, framesetName)
        end
    end

    if restoreData.startPositionX and restoreData.startPositionY then
        self.movable.vPosition.x = restoreData.startPositionX
        self.movable.vPosition.y = restoreData.startPositionY
        self:setXY(self.movable.vPosition.x, self.movable.vPosition.y)
    end

    if restoreData.lastMove then
        -- what will be the new activeFrameset (index)
        self:setActiveFrameset(restoreData.lastMove)
    end

    -- when load scene is used, we don't set the player position
    -- @warning we do this after setXY, because that function will show the player
    local currentSceneUkey = session:get("currentSceneUkey")
    if currentSceneUkey and self.sceneUkey ~= currentSceneUkey then
        self:hide()
    end
end

self.buttonSave.callbackAfterMousePressedEvent["btnSave"] = function(button)
        local currentTime = os.time()
        local saveGameName = "savegame" .. currentTime .. ".data"
        local saveGameScreenshot = "screenshot" .. currentTime .. ".png"

        -- create a screenshot without the state menu (write it to the save directory (love default))
        love.graphics.captureScreenshot(saveGameScreenshot)

        -- save the game
        State():save(saveGameName)

        -- say that the save the game was correct
        local activeActor = entityManager:find({ movableByUserInput = true }, "Player")
        if #activeActor == 1 then
            local actionSay = ActionSay()
            actionSay:execute(
                {
                    action = action.SAY,
                    initiator = activeActor[1]
                },
                {
                    text = i18n:s("Save game done!")
                },
                nil,
                {},
                {},
                nil
            )
        end

        self.buttonLoad:setIsVisible(true)

        return { preventDefault = true }
    end