--@ module = true
-- 观测模式：把界面焦点变化持续追加到 dfannals-observe.log。
-- 用途：发现"新建世界 → 进入 legends → 导出"之间的真实界面序列。

local repeatUtil = require('repeat-util')

local LOG = 'dfannals-observe.log'
local last = nil
local ticks = 0

local function focus_string()
    local ok, focus = pcall(dfhack.gui.getCurFocus)
    if not ok or not focus then return '?' end
    return table.concat(focus, '/')
end

function tick()
    ticks = ticks + 1
    local fs = focus_string()
    if fs ~= last then
        last = fs
        local f = io.open(LOG, 'a')
        if f then
            f:write(string.format('%s\t%s\n', os.date('%H:%M:%S'), fs))
            f:close()
        end
    end
end

function start()
    repeatUtil.scheduleEvery('dfannals-observe', 10, tick)
    local f = io.open(LOG, 'a')
    if f then
        f:write('--- observe start ' .. os.date('%Y-%m-%d %H:%M:%S') .. '\n')
        f:close()
    end
end

start()