-- SessionGoldTracker — DB Init & Session Restore
-- SavedVariables are auto-declared by the TOC as SessionGoldTrackerDB.

SessionGoldTrackerDB = SessionGoldTrackerDB or {}

-- ---------------------------------------------------------------------------
-- Defaults
-- ---------------------------------------------------------------------------
local DEFAULTS = {
    position = { point = "CENTER", x = 0, y = 0 },
    lifetimeTotal = 0,
    showOnLogin = false,
    lastSession = {
        sessionStart = 0,
        sessionGoldStart = 0,
        sessionGross = 0,
        sessionNet = 0,
    },
}

-- Fill in any missing keys
local function FillDefaults(t, defaults)
    for k, v in pairs(defaults) do
        if t[k] == nil then
            if type(v) == "table" then
                t[k] = {}
                FillDefaults(t[k], v)
            else
                t[k] = v
            end
        end
    end
end
FillDefaults(SessionGoldTrackerDB, DEFAULTS)

-- ---------------------------------------------------------------------------
-- Session state (not saved — restored from lastSession on login/reload)
-- ---------------------------------------------------------------------------
local sessionStart = 0
local sessionGoldStart = 0
local sessionGross = 0
local sessionNet = 0
local lastMoney = 0

-- ---------------------------------------------------------------------------
-- Constants
-- ---------------------------------------------------------------------------
local GOLD_PER_HOUR_SHOW_AFTER = 60  -- seconds before showing gph

-- ---------------------------------------------------------------------------
-- Helper: format copper as gold/silver/copper string
-- ---------------------------------------------------------------------------
local function FormatCopper(copper)
    local absCopper = math.abs(copper)
    local gold = floor(absCopper / 10000)
    local silver = floor((absCopper % 10000) / 100)
    local copper = absCopper % 100
    
    local str = ""
    if gold > 0 then
        str = str .. gold .. "g "
    end
    if silver > 0 or gold > 0 then
        str = str .. silver .. "s "
    end
    str = str .. copper .. "c"
    
    -- trim trailing space (standard Lua, no str:trim())
    str = str:gsub("^%s+", ""):gsub("%s+$", "")
    
    return (copper < 0 and "-" or "") .. str
end

-- ---------------------------------------------------------------------------
-- Frame creation (Step 4: Frame)
-- ---------------------------------------------------------------------------
local frame = CreateFrame("Frame", "SessionGoldTrackerFrame", UIParent)
frame:SetSize(200, 60)
frame:SetFrameStrata("MEDIUM")
frame:SetClampedToScreen(true)
frame:Hide()  -- hidden by default, toggled with /gt

-- Title label
local title = frame:CreateFontString(nil, "OVERLAY", "GameFontNormalSmall")
title:SetPoint("TOPLEFT", frame, "TOPLEFT", 8, -4)
title:SetText("Session Gold Tracker")

-- Session earned label
local earnedLabel = frame:CreateFontString(nil, "OVERLAY", "GameFontHighlight")
earnedLabel:SetPoint("TOPLEFT", title, "BOTTOMLEFT", 0, -8)
earnedLabel:SetText("Earned: 0c")

-- Gold per hour label
local gphLabel = frame:CreateFontString(nil, "OVERLAY", "GameFontNormalSmall")
gphLabel:SetPoint("TOPLEFT", earnedLabel, "BOTTOMLEFT", 0, -4)
gphLabel:SetText("Rate: ---")

-- Time elapsed label
local timeLabel = frame:CreateFontString(nil, "OVERLAY", "GameFontNormalSmall")
timeLabel:SetPoint("TOPLEFT", gphLabel, "BOTTOMLEFT", 0, -4)
timeLabel:SetText("Time: 0s")

-- Lifetime total label
local lifetimeLabel = frame:CreateFontString(nil, "OVERLAY", "GameFontNormalSmall")
lifetimeLabel:SetPoint("TOPLEFT", timeLabel, "BOTTOMLEFT", 0, -4)
lifetimeLabel:SetText("Lifetime: 0g 0s 0c")

-- Update display function
local function UpdateDisplay()
    local elapsed = GetTime() - sessionStart
    local hours = elapsed / 3600

    -- Earned (gross)
    earnedLabel:SetText("Earned: " .. FormatCopper(sessionGross))

    -- Gold per hour (show "---" until threshold)
    if elapsed >= GOLD_PER_HOUR_SHOW_AFTER and hours > 0 then
        local gph = sessionGross / hours
        gphLabel:SetText("Rate: " .. FormatCopper(floor(gph)) .. "/hr")
    else
        gphLabel:SetText("Rate: ---")
    end

    -- Time elapsed
    local timeStr = SecondsToTime(elapsed, false, false, 1)
    timeLabel:SetText("Time: " .. timeStr)

    -- Lifetime total
    lifetimeLabel:SetText("Lifetime: " .. FormatCopper(lifetimeTotal))
end

-- ---------------------------------------------------------------------------
-- PLAYER_LOGIN handler
-- ---------------------------------------------------------------------------
local loginFrame = CreateFrame("Frame")
loginFrame:RegisterEvent("PLAYER_LOGIN")
loginFrame:SetScript("OnEvent", function(self, event)
    self:UnregisterEvent(event)

    -- Merge any missing DB keys
    FillDefaults(SessionGoldTrackerDB, DEFAULTS)

    -- Restore session state if we have a previous session (e.g. after /reload)
    if SessionGoldTrackerDB.lastSession and SessionGoldTrackerDB.lastSession.sessionStart > 0 then
        sessionStart = SessionGoldTrackerDB.lastSession.sessionStart
        sessionGoldStart = SessionGoldTrackerDB.lastSession.sessionGoldStart
        sessionGross = SessionGoldTrackerDB.lastSession.sessionGross or 0
        sessionNet = SessionGoldTrackerDB.lastSession.sessionNet or 0
    else
        -- Fresh session
        sessionStart = GetTime()
        sessionGoldStart = GetMoney()
        sessionGross = 0
        sessionNet = 0
    end

    lastMoney = GetMoney()

    print(("[SessionGoldTracker] Session started. Gold: %s"):format(GetMoneyString(sessionGoldStart)))
    
    -- Restore position
    if SessionGoldTrackerDB.position then
        local pos = SessionGoldTrackerDB.position
        frame:ClearAllPoints()
        frame:SetPoint(pos.point, UIParent, pos.point, pos.x, pos.y)
    else
        frame:ClearAllPoints()
        frame:SetPoint("CENTER", UIParent, "CENTER", 0, 0)
    end
    
    -- Show frame if showOnLogin is true
    if SessionGoldTrackerDB.showOnLogin then
        frame:Show()
    end
    
    -- Start update ticker
    frame:SetScript("OnUpdate", function(self, elapsed)
        UpdateDisplay()
    end)
end)

-- ---------------------------------------------------------------------------
-- Lifetime total (Step 8)
-- ---------------------------------------------------------------------------
local lifetimeTotal = SessionGoldTrackerDB.lifetimeTotal or 0
SessionGoldTrackerDB.lifetimeTotal = lifetimeTotal

-- ---------------------------------------------------------------------------
-- Money tracking (PLAYER_MONEY event)
-- ---------------------------------------------------------------------------
local moneyFrame = CreateFrame("Frame")
moneyFrame:RegisterEvent("PLAYER_MONEY")
moneyFrame:SetScript("OnEvent", function(self, event)
    if event == "PLAYER_MONEY" then
        local currentMoney = GetMoney()
        local delta = currentMoney - lastMoney

        if delta > 0 then
            sessionGross = sessionGross + delta
            lifetimeTotal = lifetimeTotal + delta
            SessionGoldTrackerDB.lifetimeTotal = lifetimeTotal
        end
        sessionNet = sessionNet + delta

        lastMoney = currentMoney

        print(("[SessionGoldTracker] Money change: %s (net: %s, gross: %s)"):format(
            GetMoneyString(delta),
            GetMoneyString(sessionNet),
            GetMoneyString(sessionGross)
        ))
    end
end)

-- ---------------------------------------------------------------------------
-- Reset Button (Step 6)
-- ---------------------------------------------------------------------------
local resetButton = CreateFrame("Button", nil, frame, "UIPanelButtonTemplate")
resetButton:SetSize(60, 22)
resetButton:SetPoint("BOTTOMRIGHT", frame, "BOTTOMRIGHT", -8, 8)
resetButton:SetText("Reset")

local function DoReset()
    sessionGross = 0
    sessionNet = 0
    sessionStart = GetTime()
    sessionGoldStart = GetMoney()
    lastMoney = GetMoney()
    UpdateDisplay()
    print("[SessionGoldTracker] Session reset.")
end

resetButton:SetScript("OnClick", DoReset)

-- ---------------------------------------------------------------------------
-- Slash Command (Step 7)
-- ---------------------------------------------------------------------------
SlashCmdList["SESSIONGOLDTRACKER"] = function(msg)
    msg = msg and msg:lower() or ""
    if msg == "reset" then
        DoReset()
    else
        if frame:IsShown() then
            frame:Hide()
        else
            frame:Show()
        end
    end
end
SLASH_SESSIONGOLDTRACKER1 = "/gt"