require "common.globals"
require "common.class"

require "api.logging"

---@class PageRegistry
---@field pages Page[]
local PageRegistry = {
    __name = "PageManager",
    pages = {},
}

---Reset and initialize PageManager global
---@param params? PageRegistry
function PageRegistry:init(params)
    params = params or {}

    self.pages = params.pages or {}
end

---Store page with default name
---@param page Page
function PageRegistry:register(page)
    self:addPage(page, page.__name)
end

---Add page to page registry
---@param page Page
---@param name string
function PageRegistry:addPage(page, name)
    if self:getPage(page) then
        game.Log(self.__name .. ":storePage() : page `" .. tostring(page) .. "` already stored, overwriting...", game.LOGGER_WARNING)
    else
        game.Log(self.__name .. ":storePage() : stored page `" .. tostring(page) .. "` with key '" .. page.__name .. "'", game.LOGGER_DEBUG)
    end

    self.pages[name] = page
end

---Get page by name or by class (default name)
---@param page string|Page
function PageRegistry:getPage(page)
    if type(page) == "string" then
        return self.pages[page]
    elseif type(page) == "table" and page.__name then
        return self.pages[page.__name]
    end

    game.Log(self.__name .. ":getPage() : invalid parameter (" .. tostring(page) .. ")", game.LOGGER_WARNING)
    return nil
end

---Get page by class
---
---Ensure valid page instance by creating and registering one, if not found
---@param page Page
function PageRegistry:getOrCreatePage(page)
    if not self:getPage(page) then
        page = page.new()
        self:register(page)
    end

    return page
end

return PageRegistry