local dim = require("common.dimensions")
local Page = require("components.pager.page")


---@class ServicePage: Page
---@field title string
---@field selectedIdx integer
---@field footer string[]
local ServicePage = {
    SERVICE_DEFAULT_FONT_SIZE = 24,
    SERVICE_DEFAULT_FONT_FACE = "dfmarugoth.ttf",
    SERVICE_DEFAULT_FONT_COLOR = {255, 255, 255, 255}, --{r, g, b, a}
    SERVICE_DEFAULT_MARGIN = {92, 128, 0, 56}, --{left, top, right, bottom}
    SERVICE_DEFAULT_SPACING = 4,
    SERVICE_DEFAULT_FOOTER = {
        "BT-A/BT-B = UP/DOWN",
        "START = SELECT",
        "BACK = RETURN TO LAST PAGE"
    }
}

---Create a new ServicePage instance
---
---Inherits from Page
---@return ServicePage
function ServicePage:new(o)
    self.__index = self
    setmetatable(self, {__index = Page})
    o = Page:new(o)
    setmetatable(o, self)

    o.title = o.title or ""
    o.selectedIdx = o.selectedIdx or 0
    o.footer = o.footer or self.SERVICE_DEFAULT_FOOTER

    return o
end

---Add field to page
---@param field Field
function ServicePage:addField(field)
    field.posX = ServicePage.SERVICE_DEFAULT_MARGIN[1]
    field.posY = ServicePage.SERVICE_DEFAULT_MARGIN[2] + #self.content * (ServicePage.SERVICE_DEFAULT_FONT_SIZE + ServicePage.SERVICE_DEFAULT_SPACING)
    Page.addField(self, field)
end

function ServicePage:drawBackground(deltaTime)
    gfx.BeginPath()
    gfx.FillColor(0, 0, 0)
    gfx.Rect(0, 0, dim.design.width, dim.design.height)
    gfx.Fill()
end

function ServicePage:drawHeader(deltaTime)
    gfx.BeginPath()
    gfx.FontSize(ServicePage.SERVICE_DEFAULT_FONT_SIZE)
    gfx.LoadSkinFont(ServicePage.SERVICE_DEFAULT_FONT_FACE)
    gfx.FillColor(table.unpack(ServicePage.SERVICE_DEFAULT_FONT_COLOR))
    gfx.TextAlign(gfx.TEXT_ALIGN_CENTER | gfx.TEXT_ALIGN_TOP)
    gfx.Text(self.title, dim.design.width / 2, ServicePage.SERVICE_DEFAULT_FONT_SIZE)
end

function ServicePage:drawFooter(deltaTime)
    if self.content[selectedIndex] and self.content[selectedIndex].drawCustomFooter then
        self.content[selectedIndex].drawCustomFooter(deltaTime)
    else
        local bottomPageMargin = ServicePage.SERVICE_DEFAULT_MARGIN[4]
        local lineHeight = ServicePage.SERVICE_DEFAULT_FONT_SIZE + ServicePage.SERVICE_DEFAULT_SPACING
        gfx.BeginPath()
        gfx.FontSize(ServicePage.SERVICE_DEFAULT_FONT_SIZE)
        gfx.LoadSkinFont(ServicePage.SERVICE_DEFAULT_FONT_FACE)
        gfx.FillColor(table.unpack(ServicePage.SERVICE_DEFAULT_FONT_COLOR))
        gfx.TextAlign(gfx.TEXT_ALIGN_CENTER | gfx.TEXT_ALIGN_BOTTOM)
        if type(self.footer) == "table" then
            for index, line in ipairs(self.footer) do
                local yFooterBase = dim.design.height - bottomPageMargin - #self.footer * lineHeight
                gfx.Text(line, 1080 / 2, yFooterBase + (index-1) * lineHeight)
            end
        elseif type(self.footer) == "string" then
            local yFooterBase = dim.design.height - bottomPageMargin
            gfx.Text(self.footer, 1080 / 2, yFooterBase)
        end
    end
end

---Handle controller button input
---@param button integer
function ServicePage:handleButtonInput(button)
    local stop_processing = false
    if self.content[selectedIndex] and self.content[selectedIndex].handleButtonInput then
        stop_processing = self.content[selectedIndex].handleButtonInput(button)
    end

    -- default behaviour
    if not stop_processing then
        local direction = 0

        if button == game.BUTTON_BCK then
            if self.viewHandler then
                self.viewHandler:back()
            end
            return
        end

        if button == game.BUTTON_BTA then
            direction = -1
        elseif button == game.BUTTON_BTB then
            direction = 1
        end

        self.selectedIdx = (self.selectedIdx - 1 + direction) % #self.content + 1
    end
end

---Handle controller knob input
---@param knob integer
---@param delta number
function ServicePage:handleKnobInput(knob, delta)
    if self.content[selectedIndex] and self.content[selectedIndex].handleKnobInput then
        self.content[selectedIndex].handleKnobInput(knob, delta)
    end
end

return ServicePage