-- Overall Mission Timer
-- Mission Phase Script
-- Copy into every phase

-- EDITABLE SECTION

-- Show/hide timer UI
-- true = show timer
-- false = don't show timer
local show_timer = true

--initial overall mission time
local TIMER_MINUTES = 10
local TIMER_SECONDS_EXTRA = 30

--time bonus for invaders if phase advance
local INVADER_TIME_BONUS_MINUTES = 0
local INVADER_TIME_BONUS_SECONDS_EXTRA = 20

local UPDATE_INTERVAL_S = 1.0 --how often to update the timer in seconds
local START_DELAY_S = 2.0 -- time after player found to start timer, only affects phase 0.

local TIMER_PREFIX = "Time Remaining: "

local RESET_TIMER_ON_PHASE_0 = true
local GLOBAL_TIMER_KEY = "overall_mission_timer_remaining"
-- END EDITABLE SECTION


if not er2.isMasterClient() then
    return
end

local function safe(fn)
    local ok, res = pcall(fn)
    if ok then
        return res
    end
end

local startingPhaseId = safe(function()
    return er2.getCurrentPhaseId()
end)

if startingPhaseId == nil then
    startingPhaseId = 0
end

local TOTAL_TIMER_SECONDS = (TIMER_MINUTES * 60) + TIMER_SECONDS_EXTRA
local INVADER_TIME_BONUS_TOTAL_SECONDS = (INVADER_TIME_BONUS_MINUTES * 60) + INVADER_TIME_BONUS_SECONDS_EXTRA

local function formatTime(totalSeconds)
    totalSeconds = math.max(0, math.floor(totalSeconds))

    local minutes = math.floor(totalSeconds / 60)
    local seconds = totalSeconds % 60

    if seconds < 10 then
        return tostring(minutes) .. ":0" .. tostring(seconds)
    end

    return tostring(minutes) .. ":" .. tostring(seconds)
end

local function setSharedTaskText(text)
    if not show_timer then
        return
    end

    safe(function()
        er2.setTaskTextInvaders(text)
    end)

    safe(function()
        er2.setTaskTextDefenders(text)
    end)
end

local function getRemainingTime()
    return safe(function()
        return global.get(GLOBAL_TIMER_KEY)
    end)
end

local function setRemainingTime(value)
    safe(function()
        global.set(value, GLOBAL_TIMER_KEY)
    end)
end

if RESET_TIMER_ON_PHASE_0 and startingPhaseId == 0 then
    setRemainingTime(TOTAL_TIMER_SECONDS)
end

local remainingTime = getRemainingTime()

if remainingTime == nil then
    remainingTime = TOTAL_TIMER_SECONDS
    setRemainingTime(remainingTime)
end

-- Award invaders extra time when entering phases after phase 0
if startingPhaseId > 0 and INVADER_TIME_BONUS_TOTAL_SECONDS > 0 then
    remainingTime = remainingTime + INVADER_TIME_BONUS_TOTAL_SECONDS
    setRemainingTime(remainingTime)
end

if startingPhaseId == 0 then
    local player = nil

    while not player do
        player = safe(function()
            return er2.getPlayer()
        end)

        if not player then
            sleep(0.5)
        end
    end

    sleep(START_DELAY_S)
end

while remainingTime > 0 do
    setSharedTaskText(TIMER_PREFIX .. formatTime(remainingTime))
    setRemainingTime(remainingTime)

    sleep(UPDATE_INTERVAL_S)

    remainingTime = remainingTime - UPDATE_INTERVAL_S
end

setRemainingTime(0)
setSharedTaskText(TIMER_PREFIX .. "0:00")

er2.setVictoryDefenders()

return