local listview = require "listview"
local winhlp = require "winhlp"

local keys = {[1]="a", [2]="c"}
local obj = {a="b", c="d"}
local frame = term.current()

local function setTerm(termlike)
    frame = termlike
    listview.setTerm(frame)
end

local function setObject(other)
    obj = other
    keys = {}
    for key, _ in other do
        keys.insert(key)
    end
    table.sort(keys)
end

local function fetch(wait_for)
    local currentIdx = 1
    for i, key in pairs(keys) do
        listview.updateItemAt(currentIdx, {key=key, value=obj[key]})
        currentIdx = currentIdx + 1
    end
    listview.clearFrom(currentIdx)
end

local function displayTab(self)
    listview.updatePage(self.scrollPos)
end

local function estimatedHeight()
    return #keys
end

local function drawLine(termlike, pair)
    termlike.setBackgroundColor(colors.black)
    termlike.setTextColor(colors.yellow)
    termlike.write(tostring(pair.key))

    termlike.setTextColor(colors.white)
    local value = tostring(pair.value)
    local padding = winhlp.alignRightPadding(termlike, #value + 1)
    termlike.write(string.format("%" .. padding+1 .. "s", " "))
    termlike.write(value)
end
listview.setDrawEntryFunc(drawLine)


return {
    name="inspect",
    setTerm=setTerm,
    setObject=setObject,
    fetch=fetch,
    displayTab=displayTab,
    estimatedHeight=estimatedHeight,
}