from __future__ import annotations

THEME_JS = """
(() => {
  const media = window.matchMedia("(prefers-color-scheme: dark)");
  const storageKey = "karldns-theme";
  const systemTheme = () => (media.matches ? "dark" : "light");
  const storedTheme = () => {
    try {
      return window.localStorage.getItem(storageKey);
    } catch (_) {
      return null;
    }
  };
  const setStoredTheme = (theme) => {
    try {
      window.localStorage.setItem(storageKey, theme);
    } catch (_) {}
  };
  const syncToggle = (theme) => {
    document.querySelectorAll("[data-theme-toggle]").forEach((button) => {
      const nextTheme = theme === "dark" ? "light" : "dark";
      button.dataset.themeNext = nextTheme;
      button.setAttribute("aria-label", `Switch to ${nextTheme.toLowerCase()} theme`);
    });
  };
  const applyTheme = (requestedTheme = storedTheme() || systemTheme()) => {
    const theme = requestedTheme === "dark" ? "dark" : "light";
    document.documentElement.setAttribute("data-bs-theme", theme);
    syncToggle(theme);
    return theme;
  };
  applyTheme();
  media.addEventListener("change", () => {
    if (!storedTheme()) applyTheme();
  });
  document.addEventListener("DOMContentLoaded", () => syncToggle(document.documentElement.getAttribute("data-bs-theme") || "light"));
  document.addEventListener("click", (event) => {
    const toggle = event.target.closest("[data-theme-toggle]");
    if (!toggle) return;
    const currentTheme = document.documentElement.getAttribute("data-bs-theme") || systemTheme();
    const nextTheme = currentTheme === "dark" ? "light" : "dark";
    setStoredTheme(nextTheme);
    applyTheme(nextTheme);
  });
})();
""".strip()


CLIPBOARD_JS = """
document.addEventListener("click", async (event) => {
  document.querySelectorAll("details.copy-menu[open]").forEach((menu) => {
    if (!menu.contains(event.target)) menu.removeAttribute("open");
  });

  const toggle = event.target.closest("[data-secret-toggle]");
  if (toggle) {
    const group = toggle.closest(".copy-field");
    const field = group ? group.querySelector("[data-secret-input], [data-secret-value]") : null;
    if (!field) return;
    if (field.matches("[data-secret-input]")) {
      const masked = field.type === "password";
      field.type = masked ? "text" : "password";
      toggle.textContent = masked ? "Hide" : "View";
      toggle.setAttribute("aria-label", masked ? "Hide secret value" : "Show secret value");
    } else {
      const masked = field.dataset.secretMasked !== "false";
      field.dataset.secretMasked = masked ? "false" : "true";
      field.textContent = masked ? (field.dataset.secretValue || "") : "********";
      toggle.textContent = masked ? "Hide" : "View";
      toggle.setAttribute("aria-label", masked ? "Hide secret value" : "Show secret value");
    }
    return;
  }

  const button = event.target.closest("[data-copy]");
  if (!button) return;
  try {
    await navigator.clipboard.writeText(button.dataset.copy || "");
    const label = button.querySelector("[data-copy-label]");
    const oldLabel = label ? label.textContent : "";
    button.classList.add("is-copied");
    if (label) label.textContent = "Copied";
    const menu = button.closest("details.copy-menu");
    if (menu) {
      setTimeout(() => {
        menu.removeAttribute("open");
      }, 250);
    }
    setTimeout(() => {
      button.classList.remove("is-copied");
      if (label) label.textContent = oldLabel;
    }, 1200);
  } catch (_) {}
});

document.addEventListener("keydown", (event) => {
  if (event.key !== "Escape") return;
  document.querySelectorAll("details.copy-menu[open]").forEach((menu) => {
    menu.removeAttribute("open");
  });
});
""".strip()


ADMIN_TABLES_JS = """
document.querySelectorAll("[data-admin-table]").forEach((tableShell) => {
  const table = tableShell.querySelector("table");
  const tbody = tableShell.querySelector("tbody");
  const search = tableShell.querySelector("[data-table-search]");
  const pageSize = tableShell.querySelector("[data-table-page-size]");
  const count = tableShell.querySelector("[data-table-count]");
  const pagination = tableShell.querySelector("[data-table-pagination]");
  if (!table || !tbody || !search || !pageSize || !count || !pagination) return;

  const headerCount = table.querySelectorAll("thead th").length || 1;
  const originalRows = Array.from(tbody.querySelectorAll("tr"));
  const dataRows = originalRows.filter((row) => !row.classList.contains("empty-row"));
  let currentPage = 1;

  const emptyRow = (message) => {
    const row = document.createElement("tr");
    row.className = "empty-row";
    const cell = document.createElement("td");
    cell.className = "empty";
    cell.colSpan = headerCount;
    cell.textContent = message;
    row.append(cell);
    return row;
  };

  const visibleRows = () => {
    const query = search.value.trim().toLowerCase();
    if (!query) return dataRows;
    return dataRows.filter((row) => row.textContent.toLowerCase().includes(query));
  };

  const renderButton = (label, page, disabled = false, active = false) => {
    const item = document.createElement("li");
    item.className = `page-item${disabled ? " disabled" : ""}${active ? " active" : ""}`;
    const button = document.createElement("button");
    button.type = "button";
    button.className = "page-link";
    button.textContent = label;
    button.disabled = disabled;
    button.addEventListener("click", () => {
      currentPage = page;
      render();
    });
    item.append(button);
    return item;
  };

  const renderPagination = (totalPages) => {
    pagination.replaceChildren();
    if (totalPages <= 1) return;
    pagination.append(renderButton("Previous", Math.max(1, currentPage - 1), currentPage === 1));
    for (let page = 1; page <= totalPages; page += 1) {
      if (totalPages > 7 && page !== 1 && page !== totalPages && Math.abs(page - currentPage) > 1) {
        if (page === 2 || page === totalPages - 1) pagination.append(renderButton("...", currentPage, true));
        continue;
      }
      pagination.append(renderButton(String(page), page, false, page === currentPage));
    }
    pagination.append(renderButton("Next", Math.min(totalPages, currentPage + 1), currentPage === totalPages));
  };

  const render = () => {
    const rows = visibleRows();
    const size = Number.parseInt(pageSize.value, 10) || 25;
    const totalPages = Math.max(1, Math.ceil(rows.length / size));
    currentPage = Math.min(currentPage, totalPages);
    const start = (currentPage - 1) * size;
    const pageRows = rows.slice(start, start + size);
    tbody.replaceChildren(...(pageRows.length ? pageRows : [emptyRow(dataRows.length ? "No matching rows." : "No rows yet.")]));
    const shownStart = rows.length ? start + 1 : 0;
    const shownEnd = rows.length ? Math.min(start + size, rows.length) : 0;
    count.textContent = `${shownStart}-${shownEnd} of ${rows.length}`;
    renderPagination(totalPages);
  };

  search.addEventListener("input", () => {
    currentPage = 1;
    render();
  });
  pageSize.addEventListener("change", () => {
    currentPage = 1;
    render();
  });
  render();
});
""".strip()


VISITOR_IP_JS = """
(() => {
  const ipv4Placeholder = "203.0.113.10";
  const ipv6Placeholder = "2001:db8::10";
  const needsIpv4 = () => document.body.textContent.includes(ipv4Placeholder) || document.querySelector(`[data-copy*="${ipv4Placeholder}"]`);
  const needsIpv6 = () => document.body.textContent.includes(ipv6Placeholder) || document.querySelector(`[data-copy*="${ipv6Placeholder}"]`);

  const fetchIp = async (url) => {
    try {
      const response = await fetch(url, { cache: "no-store", mode: "cors" });
      if (!response.ok) return "";
      const payload = await response.json();
      return typeof payload.ip === "string" ? payload.ip : "";
    } catch (_) {
      return "";
    }
  };

  const replaceInTextNodes = (search, replacement) => {
    const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT);
    const nodes = [];
    while (walker.nextNode()) {
      if (walker.currentNode.nodeValue.includes(search)) nodes.push(walker.currentNode);
    }
    nodes.forEach((node) => {
      node.nodeValue = node.nodeValue.split(search).join(replacement);
    });
  };

  const replaceInCopyValues = (search, replacement) => {
    document.querySelectorAll("[data-copy]").forEach((element) => {
      const value = element.dataset.copy || "";
      if (value.includes(search)) element.dataset.copy = value.split(search).join(replacement);
    });
  };

  const replaceEverywhere = (search, replacement) => {
    if (!replacement || replacement === search) return;
    replaceInTextNodes(search, replacement);
    replaceInCopyValues(search, replacement);
  };

  const updateCopyCommand = (button, ipv6Command) => {
    const value = button.dataset.copy || "";
    if (!value || value.includes("?myipv6=")) return;
    const lines = value.split("\\n");
    const output = [];
    let inserted = false;
    lines.forEach((line) => {
      output.push(line);
      if (!inserted && line.includes("/api/v1/router/update/") && line.includes("?myip=")) {
        output.push(ipv6Command);
        inserted = true;
      }
    });
    if (inserted) button.dataset.copy = output.join("\\n");
  };

  const insertIpv6Examples = (ip) => {
    if (!ip) return;
    document.querySelectorAll(".terminal-card.manual-code").forEach((card) => {
      if (card.textContent.includes("?myipv6=")) return;
      const lines = [...card.querySelectorAll("code")];
      const ipv4Line = lines.find((line) => line.textContent.includes("/api/v1/router/update/") && line.textContent.includes("?myip="));
      if (!ipv4Line) return;
      const base = ipv4Line.textContent.split("?myip=", 1)[0].replace(/'$/, "");
      const ipv6Command = `${base}?myipv6=${ip}'`;
      const code = document.createElement("code");
      code.textContent = ipv6Command;
      ipv4Line.after(code);
      const copyButton = card.querySelector("[data-copy]");
      if (copyButton) updateCopyCommand(copyButton, ipv6Command);
    });
  };

  document.addEventListener("DOMContentLoaded", async () => {
    const tasks = [];
    if (needsIpv4()) tasks.push(fetchIp("https://api4.ipify.org?format=json").then((ip) => replaceEverywhere(ipv4Placeholder, ip)));
    if (needsIpv6() || document.querySelector(".terminal-card.manual-code")) {
      tasks.push(fetchIp("https://api6.ipify.org?format=json").then((ip) => {
        replaceEverywhere(ipv6Placeholder, ip);
        insertIpv6Examples(ip);
      }));
    }
    await Promise.allSettled(tasks);
  });
})();
""".strip()