import streamlit as st
import threading
import time
import schedule
import random
import datetime
from playwright.sync_api import sync_playwright

# ── Streamlit UI Page Config ──
# Must be the first Streamlit command called on the page
st.set_page_config(page_title="Keep-Alive Console", page_icon="🚀", layout="wide")

TARGET_URL = "https://streamer1-hsd7neqlzku825vdo6rtkz.streamlit.app/"

# ── Shared log list (thread-safe for appends in CPython) ──
logs = ["🚀 System initialized – service starting…"]

def add_log(msg):
    ts = datetime.datetime.now().strftime("%H:%M:%S")
    entry = f"[{ts}] {msg}"
    print(entry)
    logs.append(entry)
    if len(logs) > 50:
        logs.pop(0)

# ── Keep-alive routine ──
def visit_and_scroll():
    add_log(f"Opening {TARGET_URL}")
    try:
        with sync_playwright() as p:
            browser = p.chromium.launch(
                headless=True,
                args=["--no-sandbox", "--disable-dev-shm-usage", "--disable-gpu"],
            )
            try:
                page = browser.new_page(
                    user_agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
                               "AppleWebKit/537.36 (KHTML, like Gecko) "
                               "Chrome/120.0.0.0 Safari/537.36"
                )
                page.goto(TARGET_URL, wait_until="networkidle", timeout=60_000)
                add_log("Page loaded – waiting 10 s for hydration…")
                time.sleep(10)

                for i in range(1, 6):
                    y = i * 800
                    page.evaluate(f"window.scrollTo(0, {y});")
                    add_log(f"Scrolled to {y}px")
                    time.sleep(random.uniform(1.5, 3.0))

                page.evaluate("window.scrollTo(0, 0);")
                add_log("Visit completed successfully ✅")
            finally:
                browser.close()
    except Exception as e:
        add_log(f"ERROR: {e}")

# ── Background scheduler (one thread, runs forever) ──
def _loop():
    visit_and_scroll()
    schedule.every(10).minutes.do(visit_and_scroll)
    while True:
        schedule.run_pending()
        time.sleep(10) # check for scheduled tasks more frequently

# Guard: start the thread only once per Streamlit process using cache_resource
@st.cache_resource
def start_scheduler():
    thread = threading.Thread(target=_loop, daemon=True)
    thread.start()
    return thread

start_scheduler()

# ── Streamlit UI layout ──
st.title("🤖 Keep-Alive Cloud Console")
st.caption(f"Target: **{TARGET_URL}**  •  Frequency: every 10 minutes")
st.divider()

# Fragment for non-blocking UI logs refresh if supported (Streamlit >= 1.33)
if hasattr(st, "fragment"):
    @st.fragment(run_every="30s")
    def display_logs_fragment():
        st.text_area("Logs (newest first)", "\n".join(reversed(logs)), height=400, disabled=True)
else:
    def display_logs_fragment():
        st.text_area("Logs (newest first)", "\n".join(reversed(logs)), height=400, disabled=True)

c1, c2 = st.columns([3, 1])
with c1:
    st.subheader("Activity Log")
    display_logs_fragment()
with c2:
    st.subheader("Controls")
    if st.button("🚀 Push Now"):
        with st.spinner("Visiting…"):
            visit_and_scroll()
        st.success("Done!")
        st.rerun() # Force rerun to refresh logs immediately on manual push
    st.info("Background scheduler is active.")

# Page level auto-refresh fallback for older Streamlit versions (< 1.33)
if not hasattr(st, "fragment"):
    time.sleep(30)
    st.rerun()