-- Showcase of the tui terminal-control functions and markup action tags:
-- inline redraws, the alternate screen, absolute cursor addressing, scroll
-- regions. Needs a real terminal — piped, everything degrades to no-ops.
--
-- Run with:  cargo run -- lua/tui_term.lua

tui.setTitle("tui terminal demo")

----------------------------------------------------------------------
-- 1. Inline progress: redraw one line with the <clear=line> action tag
----------------------------------------------------------------------
for i = 1, 30 do
    tui.raw(tui.styled(("<clear=line>working <info>%d/30</info> %s"):format(i, ("#"):rep(i))))
    os.sleep(0.03)
end
tui.raw(tui.styled("<clear=line>"))
tui.success("progress loop finished")

----------------------------------------------------------------------
-- 2. Full-screen: alternate screen + absolute cursor addressing
----------------------------------------------------------------------
tui.altScreen(true)
tui.clearScreen()
tui.showCursor(false)

local info = tui.screenInfo()
local w, h = info.width or 80, info.height or 24
tui.moveTo(2, 3)
tui.raw(tui.styled(("<info;b>alternate screen</> — %dx%d cells"):format(w, h)))

-- A little box drawn with moveTo.
for row = 4, 8 do
    tui.moveTo(row, 3)
    if row == 4 or row == 8 then
        tui.raw("+" .. ("-"):rep(20) .. "+")
    else
        tui.raw("|" .. (" "):rep(20) .. "|")
    end
end
tui.moveTo(6, 6)
tui.raw(tui.styled("<yellow>boxed content</>"))

tui.moveTo(10, 3)
tui.raw("where is the cursor? ")
local row, col = tui.cursorPos()
tui.raw(tui.styled(("at <b>row %s, col %s</b>"):format(tostring(row), tostring(col))))

tui.moveTo(12, 3)
tui.raw("back to the normal screen in 2 seconds...")
os.sleep(2)

tui.altScreen(false)
tui.showCursor(true)
print("back — scrollback intact.")

----------------------------------------------------------------------
-- 3. Scroll region: log lines scrolling under a fixed header
----------------------------------------------------------------------
print()
print(tui.styled("<b>FIXED HEADER</b> (lines below scroll, this one stays)"))
local top = select(1, tui.cursorPos())
if top then
    tui.scrollRegion(top, top + 5)
    for i = 1, 15 do
        tui.moveTo(top + 5, 1)
        tui.raw(("\nlog line %d"):format(i))
        os.sleep(0.1)
    end
    tui.scrollRegion()
    tui.moveTo(top + 6, 1)
end
print("scroll region reset.")

-- Deliberately no title restore: the runtime pops the pushed title (and
-- would also leave the alt screen / re-show the cursor) on exit.