#!/usr/bin/env python3

"""Shared page-shell helpers for inline HTML templates."""

PAGE_LINKS = (
    ("search", "Search", "/"),
    ("config", "Config", "/config"),
    ("watchlist", "Watchlist", "/watchlist"),
)


BROWSER_API_HELPER = r"""
    async function api(path, options = {}) {
      const headers = new Headers(options.headers || {});
      if (options.body && !headers.has("Content-Type")) {
        headers.set("Content-Type", "application/json");
      }
      const response = await fetch(path, {
        ...options,
        headers
      });
      const raw = await response.text();
      let data = {};
      if (raw) {
        try {
          data = JSON.parse(raw);
        } catch (_error) {
          data = { error: raw };
        }
      }
      if (!response.ok) throw new Error(data.error || response.statusText || "Request failed");
      return data;
    }
"""


BROWSER_POLL_HELPER = r"""
    function startSerialPoll(callback, intervalMs) {
      let inFlight = false;
      let active = true;
      let timer = null;
      const stop = () => {
        active = false;
        if (timer !== null) {
          window.clearTimeout(timer);
          timer = null;
        }
      };
      const tick = async () => {
        if (!active || inFlight) {
          if (active) timer = window.setTimeout(tick, intervalMs);
          return;
        }
        inFlight = true;
        try {
          await callback();
        } finally {
          inFlight = false;
          if (active) timer = window.setTimeout(tick, intervalMs);
        }
      };
      window.addEventListener("pagehide", stop, { once: true });
      window.addEventListener("beforeunload", stop, { once: true });
      timer = window.setTimeout(tick, intervalMs);
      return { stop };
    }
"""


def render_sidebar_brand(note, badge, badge_id=""):
    badge_attr = f' id="{badge_id}"' if badge_id else ""
    return (
        '      <div class="topline">\n'
        '        <div class="brand-wrap">\n'
        '          <h1>ani-cli <span class="brand-word">web</span></h1>\n'
        f"          <p class=\"shell-note\">{note}</p>\n"
        "        </div>\n"
        f"        <span class=\"badge\"{badge_attr}>{badge}</span>\n"
        "      </div>\n"
    )


def render_page_links(active_page):
    links = []
    for key, label, href in PAGE_LINKS:
        class_name = "page-link active" if key == active_page else "page-link"
        links.append(f'        <a class="{class_name}" href="{href}">{label}</a>')
    return "      <div class=\"page-links\">\n" + "\n".join(links) + "\n      </div>\n"