require("common.class")
local Dim = require("common.dimensions")
local Field = require("components.pager.field")

---@class ServiceFieldState
ServiceFieldState = {
    INACTIVE = 0,
    FOCUSED = 1,
    ACTIVE = 2
}

---@class ServiceField: Field
---@field label string
---@field value any
---@field valueOffX number
---@field footer string|string[]
---@field _state ServiceFieldState
local ServiceField = {
    __tostring = function() return "ServiceField" end,
    FONT_SIZE = 24,
    FONT_FACE = "dfmarugoth.ttf",
    FONT_COLOR = {255, 255, 255, 255}, --{r, g, b, a}
    FONT_ACTIVE_COLOR = {0, 255, 0, 255},
    FONT_FOCUSED_COLOR = {255, 0, 0, 255},
    MARGIN = {0, 0, 0, 4}, --{left, top, right, bottom}
}

---Create a new ServiceField instance
---@param o? table # initial parameters
---@return ServiceField
function ServiceField:new(o)
    o = o or {}

    local h = self.FONT_SIZE +
        self.MARGIN[2] +
        self.MARGIN[4]

    o.aabbH = o.aabbH or h
    o.aabbW = o.aabbW or Dim.design.width - 128 --:shrug:

    o.valueOffX = o.valueOffX or Dim.design.width / 2

    o.label = o.label or "<UNDEFINED>"
    o.value = o.value or nil
    o.footer = o.footer or nil

    o._state = ServiceFieldState.INACTIVE

    return Inherit(self, o, Field)
end

---@param obj? any message object for the field
function ServiceField:activate(obj)
    self._state = ServiceFieldState.ACTIVE
end

---@param obj? any message object for the field
function ServiceField:focus(obj)
    self._state = ServiceFieldState.FOCUSED
end

---@param obj? any message object for the field
function ServiceField:deactivate(obj)
    self._state = ServiceFieldState.INACTIVE
end

---@param deltaTime number frametime in seconds
function ServiceField:drawLabel(deltaTime)
    local color
    if self._state == ServiceFieldState.FOCUSED then
        color = self.FONT_FOCUSED_COLOR
    else
        color = self.FONT_COLOR
    end

    gfx.FontSize(self.FONT_SIZE)
    gfx.LoadSkinFont(self.FONT_FACE)
    gfx.TextAlign(gfx.TEXT_ALIGN_LEFT | gfx.TEXT_ALIGN_TOP)
    gfx.FillColor(table.unpack(color))
    gfx.Text(self.label, 0, 0)
end

---@param deltaTime number frametime in seconds
function ServiceField:drawValue(deltaTime)
    local text
    if type(self.value) == "string" then
        text = string.upper(self.value)
    else
        text = "N/A"
    end

    gfx.FontSize(self.FONT_SIZE)
    gfx.LoadSkinFont(self.FONT_FACE)
    gfx.TextAlign(gfx.TEXT_ALIGN_LEFT | gfx.TEXT_ALIGN_TOP)
    gfx.FillColor(table.unpack(self.FONT_COLOR))
    gfx.Text(text, self.valueOffX, 0)
end

---@param deltaTime number frametime in seconds
function ServiceField:drawContent(deltaTime)
    self:drawLabel(deltaTime)
    self:drawValue(deltaTime)
end

return ServiceField