-- Id: 22737

-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=60502

--+------------------------------------------------------------------+
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--|                                            http://fxcodebase.com |
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--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
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--+------------------------------------------------------------------+

function Init()
    indicator:name("Draw the time left of last bar")
    indicator:description("")
    indicator:requiredSource(core.Bar)
    indicator:type(core.Indicator)

    indicator.parameters:addGroup("Calculation")
    indicator.parameters:addString("TF1", "1. Time Frame ", "", "m1")
    indicator.parameters:setFlag("TF1", core.FLAG_PERIODS)

    indicator.parameters:addString("TF2", "2. Time Frame ", "", "H1")
    indicator.parameters:setFlag("TF2", core.FLAG_PERIODS)

    indicator.parameters:addString("TF3", "3. Time Frame ", "", "D1")
    indicator.parameters:setFlag("TF3", core.FLAG_PERIODS)

    indicator.parameters:addGroup("Style")
    indicator.parameters:addString("Display", "Display", "", "0")
    indicator.parameters:addStringAlternative("Display", "Time", "", "0")
    indicator.parameters:addStringAlternative("Display", "Percentage", "", "1")
    indicator.parameters:addStringAlternative("Display", "Both", "", "2")
    indicator.parameters:addColor("color", "Fill Color", "", core.rgb(0, 255, 255))
    indicator.parameters:addInteger("transparency", "Fill Transparency", "0 - opaque, 100 - transparent", 75, 0, 100)
    indicator.parameters:addString("Corner", "Corner", "", "Right-Top")
    indicator.parameters:addStringAlternative("Corner", "Right-Top", "", "Right-Top")
    indicator.parameters:addStringAlternative("Corner", "Right-Bottom", "", "Right-Bottom")
    indicator.parameters:addStringAlternative("Corner", "Left-Bottom", "", "Left-Bottom")
    indicator.parameters:addInteger("Size", "Size", "", 100)
end

local first = 0
local source = nil

local color
local transparency
local Corner, IntCorner, Size
local T
local TimerID

local TF = {}
-- initializes the instance of the indicator
function Prepare(nameOnly)
    source = instance.source
    first = source:first()
    local name = profile:id() .. "(" .. source:name() .. ")"
    instance:name(name)
    Corner = instance.parameters.Corner
    T = tonumber(instance.parameters.Display)

    if Corner == "Right-Top" then
        IntCorner = 0
    elseif Corner == "Right-Bottom" then
        IntCorner = 1
    elseif Corner == "Left-Top" then
        IntCorner = 2
    else
        IntCorner = 3
    end

    Size = instance.parameters.Size

    if nameOnly then
        return
    end

    TF[1] = instance.parameters.TF1
    TF[2] = instance.parameters.TF2
    TF[3] = instance.parameters.TF3

    instance:ownerDrawn(true)

    color = instance.parameters.color
    transparency = instance.parameters.transparency
    if transparency == 100 then
        transparency = 255
    elseif transparency == 0 then
        transparency = 0
    else
        transparency = math.floor(255 * (transparency / 100.0) + 0.5)
    end
    TimerID = core.host:execute("setTimer", 1, 1)
end

function Update(period)
end

local init = false
local x1, y1, x2, y2
local CustomX, CustomY

function Draw(stage, context)
    if stage ~= 0 then
        return
    end

    if not init then
        context:createSolidBrush(1, color)
        context:createPen(2, context.SOLID, 1, color)
        context:createFont(3, "Arial", 5, 0, 0)
        init = true
    end

    Add(1, context)
    Add(2, context)
    Add(3, context)
end

function Add(id, context)
    local beginTime, endTime =
        core.getcandle(
        TF[id],
        core.host:execute("getServerTime"),
        core.host:execute("getTradingDayOffset"),
        core.host:execute("getTradingWeekOffset")
    )

    local Past = core.host:execute("convertTime", core.TZ_EST, core.TZ_LOCAL, endTime) - core.now()
    local Angle = -Past / (endTime - beginTime) * 2 * math.pi - math.pi / 2
    while Past <= 0 do
        Past = Past + endTime - beginTime
    end
    local percents = math.floor(Past / (endTime - beginTime) * 100)
    Past = math.floor(Past * 86400 + 0.5)
    local top, bottom, left, right = context:top(), context:bottom(), context:left(), context:right()

    local h, m, s, t, p, n
    t = " "
    s = math.floor(Past % 60)
    m = math.floor((Past / 60)) % 60
    h = math.floor(Past / 3600)

    if T == 0 then
        t = string.format("%i:%02i:%02i", h, m, s)
    elseif T == 1 then
        t = string.format("%i%%", percents)
    elseif T == 2 then
        t = string.format("%i:%02i:%02i %i%%", h, m, s, percents)
    end

    if IntCorner == 0 then
        x1 = right - Size - Size * (id - 1)
        y1 = top
        x2 = right - Size * (id - 1)
        y2 = top + Size
    elseif IntCorner == 1 then
        x1 = right - Size - Size * (id - 1)
        y1 = bottom - Size
        x2 = right - Size * (id - 1)
        y2 = bottom
    elseif IntCorner == 2 then
        x1 = left + Size * (id - 1)
        y1 = top
        x2 = left + Size + Size * (id - 1)
        y2 = top + Size
    elseif IntCorner == 3 then
        x1 = left + Size * (id - 1)
        y1 = bottom - Size
        x2 = left + Size + Size * (id - 1)
        y2 = bottom
    end

    local x_center, y_center = (x1 + x2) / 2, (y1 + y2) / 2

    local x, y = math2d.polarToCartesian(Size / 2, Angle)
    x, y = x + x_center, y + y_center

    local width, height = context:measureText(3, t, context.CENTER)
    if y2 + height <= bottom then
        context:drawEllipse(2, -1, x1, y1, x2, y2)
        context:drawArc(2, 1, x1, y1, x2, y2, x, y, x_center, y1, transparency)
        context:drawText(3, t, color, -1, x1, y2, x2, y2 + height, context.CENTER)
    else
        context:drawEllipse(2, -1, x1, y1 - height, x2, y2 - height)
        context:drawArc(2, 1, x1, y1 - height, x2, y2 - height, x, y - height, x_center, y1 - height, transparency)
        context:drawText(3, t, color, -1, x1, y2 - height, x2, y2, context.CENTER)
    end
end

function AsyncOperationFinished(cookie, success, message, message1, message2)
    if cookie == 1 then
        instance:updateFrom(source:size() - 1)
    end
end