-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=65172

--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  |
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--+------------------------------------------------------------------+

-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
-- TODO: Add minimal and maximal value of numeric parameters and default color of the streams
function Init()
    indicator:name("Free Capital Indicator")
    indicator:description("")
    indicator:requiredSource(core.Bar)
    indicator:type(core.Indicator)

    indicator.parameters:addGroup("Selector")
    indicator.parameters:addString("Account", "Account to trade", "", "")
    indicator.parameters:setFlag("Account", core.FLAG_ACCOUNT)

    -- indicator.parameters:addBoolean("Use_GrossPL", "Use Gross PL", "", true);
    --   indicator.parameters:addBoolean("Use_UsedMargin", "Use Used Margin", "", true);
    -- indicator.parameters:addBoolean("Use_Stop", "Use Stop Level", "", true);

    indicator.parameters:addGroup("Placement")
    indicator.parameters:addString("Y", " Y Placement", "", "Top")
    indicator.parameters:addStringAlternative("Y", "Top", "Top", "Top")
    indicator.parameters:addStringAlternative("Y", "Bottom", "Bottom", "Bottom")

    indicator.parameters:addString("X", " X Placement", "", "Left")
    indicator.parameters:addStringAlternative("X", "Right", "Right", "Right")
    indicator.parameters:addStringAlternative("X", "Left", "Left", "Left")
    indicator.parameters:addInteger("ShiftY", "Shift", "", 0)

    indicator.parameters:addGroup("Style")
    indicator.parameters:addColor("Label", "Label Color", "", core.rgb(0, 0, 0))
    indicator.parameters:addInteger("Size", "Font Size", "", 20)
    indicator.parameters:addColor("color", "Line Color", "", core.rgb(255, 0, 0))
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- TODO: Refine the first period calculation for each of the output streams.
-- TODO: Calculate all constants, create instances all subsequent indicators and load all required libraries
-- Parameters block

local first
local source = nil
local X, Y
local font
local Label
local Size
local ShiftY
local Free_Capital = 0
local Account

--local Use_GrossPL;
--local Use_UsedMargin;
--local Use_Stop;
-- Routine

function Prepare(nameOnly)
    local name = profile:id() .. "(" .. instance.source:name() .. ")"
    instance:name(name)

    if (nameOnly) then
        return
    end

    Y = instance.parameters.Y
    X = instance.parameters.X
    ShiftY = instance.parameters.ShiftY
    Label = instance.parameters.Label
    Size = instance.parameters.Size

    Account = instance.parameters.Account
    -- Use_GrossPL=instance.parameters.Use_GrossPL;
    -- Use_UsedMargin=instance.parameters.Use_UsedMargin;
    --Use_Stop=instance.parameters.Use_Stop;

    source = instance.source
    first = source:first()

    instance:ownerDrawn(true)

    core.host:execute("setTimer", 1, 1)
end

function ReleaseInstance()
    core.host:execute("killTimer", 1)
end

local LimitPips = 0
local LimitAccountCurrency = 0

function AsyncOperationFinished(cookie)
    if cookie == 1 then
        LimitPips, LimitAccountCurrency = Stop_Calculation()
    end
end

function Stop_Calculation()
    local Pips = 0
    local Currency = 0
    local enum, row

    enum = core.host:findTable("trades"):enumerator()
    row = enum:next()

    local PipCost, Point

    while row ~= nil do
        if row.AccountID == Account then
            PipCost = core.host:findTable("offers"):find("Instrument", row.Instrument).PipCost
            Point = core.host:findTable("offers"):find("Instrument", row.Instrument).PointSize
            local base_size = core.host:execute("getTradingProperty", "baseUnitSize", row.Instrument, Account);

            if row.Limit ~= 0 then
                Pips = Pips + (math.abs(row.Open - row.Limit) / Point)
                Currency = Currency + (row.Lot / base_size) * (math.abs(row.Open - row.Limit) / Point) * PipCost
            end
        end

        row = enum:next()
    end

    return Pips, Currency
end

-- Indicator calculation routine
-- TODO: Add your code for calculation output values

function Update(period)
end

local init = false

function Draw(stage, context)
    if stage ~= 2 then
        return
    end

    if not init then
        context:createFont(1, "Arial", context:pointsToPixels(Size), context:pointsToPixels(Size), 0)
        init = true
    end

    local Text1 =
        "Pips : " ..
        win32.formatNumber(LimitPips, false, 2) ..
            " Account Currency : " .. win32.formatNumber(LimitAccountCurrency, false, 2)

    local i = 1
    width, height = context:measureText(1, Text1, 0)
    context:drawText(
        1,
        Text1,
        Label,
        -1,
        iX(context, width, 0, 1),
        iY(context, height, i, 0),
        iX(context, width, 0, 2),
        iY(context, height, i, 1),
        0
    )
end

function iX(context, width, Shift, x)
    if X == "Left" then
        return context:left() + Shift * width + width * (x - 1)
    else
        return context:right() - width * Shift - width * (1 - (x - 1))
    end
end

function iY(context, height, Index, Line)
    if Y == "Top" then
        return context:top() + Index * height + ShiftY * height + Line * height
    else
        if Line == 1 then
            return context:bottom() - (Index + 1) * height - ShiftY * height + height
        else
            return context:bottom() - (Index + 1) * height - ShiftY * height
        end
    end
end