--CampaignMenu.lua

local P = createMenuSheet("CampaignMenu")

function P.onLoad()
    
    local MissionTwoButton = winMgr:getWindow("orxonox/MissionTwoButton")
    if (P.CheckLevel("missionOne.oxw")) then
    MissionTwoButton:setProperty("Disabled", "False")
    end
    
    local MissionThreeButton = winMgr:getWindow("orxonox/MissionThreeButton")
    if (P.CheckLevel("fightInOurBack.oxw")) then
    MissionThreeButton:setProperty("Disabled", "False")
    end

    local MissionFourButton = winMgr:getWindow("orxonox/MissionFourButton")
    if (P.CheckLevel("pirateAttack.oxw")) then
    MissionFourButton:setProperty("Disabled", "False")
    end
    
    local Completed = winMgr:getWindow("orxonox/CampaignMenuCongratulation")
    if (P.CheckLevel("iJohnVane_TriptoArea51.oxw")) then
    Completed:setProperty("Visible","True")
    end
end

function P.GenerateHelperString(number)
    local string = ""
    while number > 1 do
        string = string.." "
        number = number-1
    end
    string = string.."."
    return string
end

function P.FindLevel(filename)
    local level = nil
    local templevel = nil
    local size = orxonox.LevelManager:getInstance():getNumberOfLevels()
    local index = 0
    while index < size do
        templevel = orxonox.LevelManager:getInstance():getAvailableLevelListItem(index)
        if(templevel:getXMLFilename()==filename) then 
            level = templevel
        end
    index=index+1
    end
    return level
end
    
function P.CheckLevel(filename)
    local file = io.open("campaign.txt", "r+")
    local index = 0
    local returnvalue = false
    local numberoflines = 58-string.len(filename)
    local helpstringfalse = filename.." 0"..P.GenerateHelperString(numberoflines) 
    local helpstringtrue = filename.." 1"..P.GenerateHelperString(numberoflines)
    while index < 100 do
        local line = file:read()
        if(line == helpstringfalse) then
            returnvalue = false 
            break
        end
        if(line == helpstringtrue) then
            returnvalue = true
            break
        end
        index=index+1
    end
    io.close(file)
    return returnvalue
end

function P.MissionOneButton_clicked(e)
    local level = P.FindLevel("missionOne.oxw")
        orxonox.execute("startGame " .. level:getXMLFilename())
        hideAllMenuSheets()
end

function P.MissionTwoButton_clicked(e)
    local level = P.FindLevel("fightInOurBack.oxw")
    if (P.CheckLevel("missionOne.oxw")) then
        orxonox.execute("startGame " .. level:getXMLFilename())
        hideAllMenuSheets()
    end
end

function P.MissionThreeButton_clicked(e)
    local level = P.FindLevel("pirateAttack.oxw")
    if (P.CheckLevel("fightInOurBack.oxw")) then
        orxonox.execute("startGame " .. level:getXMLFilename())
        hideAllMenuSheets()
    else
         hideMenuSheet(P.name)
    end
end

function P.MissionFourButton_clicked(e)
    local level = P.FindLevel("iJohnVane_TriptoArea51.oxw")
    if (P.CheckLevel("pirateAttack.oxw")) then
        orxonox.execute("startGame " .. level:getXMLFilename())
        hideAllMenuSheets()
    else
         hideMenuSheet(P.name)
    end
end

function P.CampaignMenuRefreshButton_clicked(e)
    local MissionTwoButton = winMgr:getWindow("orxonox/MissionTwoButton")
    if (P.CheckLevel("missionOne.oxw")) then
    MissionTwoButton:setProperty("Disabled", "False")
    end
    
    local MissionThreeButton = winMgr:getWindow("orxonox/MissionThreeButton")
    if (P.CheckLevel("fightInOurBack.oxw")) then
    MissionThreeButton:setProperty("Disabled", "False")
    end

    local MissionFourButton = winMgr:getWindow("orxonox/MissionFourButton")
    if (P.CheckLevel("pirateAttack.oxw")) then
    MissionFourButton:setProperty("Disabled", "False")
    end
    
    local Completed = winMgr:getWindow("orxonox/CampaignMenuCongratulation")
    if (P.CheckLevel("iJohnVane_TriptoArea51.oxw")) then
    Completed:setProperty("Visible","True")
    end
end

function P.CampaignMenuBackButton_clicked(e)
    hideMenuSheet(P.name)
end



return P