from __future__ import annotations

from ..services.ddns import DdnsService
from ..settings import DdnsSettings
from .components import (
    _code_window,
    _copy_button,
    _copy_row,
    _event_label,
    _fritzbox_fields,
    _manual_update_commands,
    _secret_notice,
)
from .html_utils import SafeHtml, attr, escape, trusted
from .layout import _page, _top_nav


def _render_management_page(
    service: DdnsService,
    settings: DdnsSettings,
    management_slug: str,
    account: dict[str, str | int | None],
    csrf_token: str,
    message: str | None = None,
    request_ip: str | None = None,
) -> str:
    account_for_url = {
        "hostname": str(account["hostname"]),
        "update_slug": str(account["update_slug"]),
        "management_slug": management_slug,
    }
    update_url = service.fritz_update_url(account_for_url)
    hostname = escape(account["hostname"])
    ipv4 = escape(account.get("ipv4") or "-")
    ipv6 = escape(account.get("ipv6") or "-")
    updated = escape(account.get("updated_at") or "Never")
    fritzbox_fields = _fritzbox_fields(update_url, hostname)
    cname_record = f"your-subdomain.example.com. CNAME {hostname}."
    manual_commands = _manual_update_commands(update_url, request_ip)
    history_rows = "\n".join(_user_event_row(event) for event in service.store.list_update_events_for_hostname(str(account["hostname"]), 10)) or """
      <tr><td colspan="6" class="empty">No router updates yet.</td></tr>
    """
    message_html = _management_message(message)
    dashboard_password_panel = _dashboard_password_panel(management_slug, csrf_token, bool(account.get("dashboard_password_hash")))
    return _page(
        "KarlDNS management",
        trusted(f"""
        <main id="main" class="dashboard-page">
          {_top_nav()}
          <section class="dashboard-shell">
            <div class="container">
              <div class="dashboard-header">
                <div>
                  <p class="eyebrow">Dashboard</p>
                  <h1>{hostname}</h1>
                  <p class="lead">Private management link. Keep it safe.</p>
                </div>
                <a class="btn btn-outline-primary rounded-pill" href="/">Home</a>
              </div>
              {message_html}
              <div class="dashboard-grid">
                <section class="dashboard-card dashboard-card-main" aria-labelledby="router-settings-title">
                  <div class="dashboard-card-header">
                    <div>
                      <p class="eyebrow">Router settings</p>
                      <h2 id="router-settings-title">Update endpoint</h2>
                    </div>
                    <form method="post" action="/m/{attr(management_slug)}/rotate">
                      <input type="hidden" name="csrf" value="{attr(csrf_token)}">
                      <input type="hidden" name="action" value="update">
                      <button class="btn btn-outline-primary rounded-pill" type="submit">New update URL</button>
                    </form>
                  </div>
                  <p class="section-copy">Paste the Update-URL into your router. Use the hostname as Domainnamen, or point your own subdomain at it with a CNAME.</p>
                  {_secret_notice()}
                  <div class="dashboard-copy-stack">
                    {_copy_row("Update-URL:", update_url, "Secret")}
                    {_copy_row("Domainnamen:", hostname, "Public")}
                    {_copy_row("CNAME target:", hostname, "Public")}
                  </div>
                  <div class="dashboard-actions">
                    {_copy_button("Router fields", fritzbox_fields)}
                    {_copy_button("Copy CNAME", cname_record, style="outline-secondary")}
                  </div>
                </section>
                <section class="dashboard-card dashboard-status-card" aria-labelledby="status-title">
                  <p class="eyebrow">Current address</p>
                  <h2 id="status-title">Status</h2>
                  <dl class="dashboard-status-list">
                    <div><dt>IPv4</dt><dd>{ipv4}</dd></div>
                    <div><dt>IPv6</dt><dd>{ipv6}</dd></div>
                    <div><dt>Updated</dt><dd>{updated}</dd></div>
                  </dl>
                </section>
              </div>
              <section class="dashboard-card dashboard-card-compact" aria-labelledby="manual-updates-title">
                <div class="dashboard-card-header">
                  <div>
                    <p class="eyebrow">Manual updates</p>
                    <h2 id="manual-updates-title">curl examples</h2>
                  </div>
                </div>
                <p class="section-copy">FRITZ!Box fills IP placeholders automatically. Scripts can send an IP explicitly or omit it and let KarlDNS use the request IP.</p>
                {_code_window(manual_commands, copy_label="manual update commands", class_name="manual-code")}
              </section>
            </div>
          </section>
          {dashboard_password_panel}
          <section class="dashboard-section">
            <div class="container">
              <div class="dashboard-section-header">
                <div>
                  <p class="eyebrow">History</p>
                  <h2>Router updates</h2>
                  <p class="section-copy">Recent IP changes and failed updates for this hostname.</p>
                </div>
              </div>
              <div class="table-responsive dashboard-table-shell">
                <table class="table table-hover dashboard-history-table mb-0">
                  <thead><tr><th>Time</th><th>Status</th><th>IPv4</th><th>IPv6</th><th>Count</th><th>Detail</th></tr></thead>
                  <tbody>{history_rows}</tbody>
                </table>
              </div>
            </div>
          </section>
          <section class="dashboard-section dashboard-danger-section">
            <div class="container">
              <div class="dashboard-danger-card">
                <div>
                  <p class="eyebrow">Delete</p>
                  <h2>Delete hostname</h2>
                  <p class="section-copy">Remove this hostname and its DNS records. The update URL will stop working.</p>
                </div>
                <form method="post" action="/m/{attr(management_slug)}/delete">
                  <input type="hidden" name="csrf" value="{attr(csrf_token)}">
                  <button class="btn btn-outline-danger rounded-pill" type="submit">Delete hostname</button>
                </form>
              </div>
            </div>
          </section>
        </main>
        """),
        extra_styles=trusted('<link href="/admin.css?v=5" rel="stylesheet">'),
    )

def _render_pending_management_page(
    service: DdnsService,
    settings: DdnsSettings,
    management_slug: str,
    account: dict[str, str | int | None],
    csrf_token: str,
    message: str | None = None,
    request_ip: str | None = None,
) -> str:
    raw_hostname = str(account["hostname"])
    account_for_url = {
        "hostname": raw_hostname,
        "update_slug": str(account["update_slug"]),
        "management_slug": management_slug,
    }
    update_url = service.fritz_update_url(account_for_url)
    dashboard_url = service.dashboard_url({"management_slug": management_slug})
    hostname = escape(raw_hostname)
    message_html = _management_message(message)
    cleanup_hours = settings.cleanup_pending_account_hours
    cleanup_text = f"{cleanup_hours} hours" if cleanup_hours != 24 else "24 hours"
    manual_commands = _manual_update_commands(update_url, request_ip)
    return _page(
        "KarlDNS setup",
        trusted(f"""
        <main id="main">
          {_top_nav()}
          <section class="hero-band compact">
            <div class="container text-center d-grid justify-items-center gap-3">
              <p class="eyebrow">Pending setup</p>
              <h1>{hostname}</h1>
              <p class="lead">Save these values, then register the hostname. Pending setups are cleaned up after {escape(cleanup_text)}.</p>
            </div>
          </section>
          {message_html}
          <section class="section">
            <div class="container narrow d-grid gap-4">
              <div>
                <p class="eyebrow">Save</p>
                <h2>Your values.</h2>
                <p class="section-copy">Save the update URL and dashboard link before you register. After registration, the dashboard hides secrets by default.</p>
                <p class="section-copy"><strong>Public:</strong> Domainnamen. <strong>Secret:</strong> Update-URL and private dashboard.</p>
              </div>
              <div class="d-grid gap-2">
                {_copy_row("Update-URL:", update_url, "Secret", mask_secret=False)}
                {_copy_row("Domainnamen:", raw_hostname, "Public")}
                {_copy_row("Private dashboard:", dashboard_url, "Secret", mask_secret=False)}
              </div>
              <form method="post" action="/m/{attr(management_slug)}/activate">
                <input type="hidden" name="csrf" value="{attr(csrf_token)}">
                <button class="btn btn-primary rounded-pill" type="submit">Register hostname</button>
              </form>
            </div>
          </section>
          <section class="section section-compact">
            <div class="container narrow d-grid gap-4">
              <div>
                <p class="eyebrow">FRITZ!Box</p>
                <h2>Router setup.</h2>
                <p class="section-copy">Paste this exact URL into the FRITZ!Box <strong>Update-URL</strong> field. Use <strong>{hostname}</strong> as <strong>Domainnamen</strong>. No KarlDNS username or password is needed; if your router requires them, enter any placeholder.</p>
                {_code_window(update_url, copy_label="FRITZ!Box update URL", class_name="mt-3")}
              </div>
              <div>
                <h2>Manual updates.</h2>
                <p class="section-copy">Scripts can send the IP explicitly, or omit it and let KarlDNS use the request IP. Visible examples use your public IP when KarlDNS or your browser can detect it.</p>
                {_code_window(manual_commands, copy_label="manual update commands", class_name="manual-code mt-3")}
              </div>
              <div>
                <h2>Use your own DNS name.</h2>
                <p class="section-copy">Create a CNAME at your DNS provider that points to <strong>{hostname}</strong>. This is the same value as Domainnamen.</p>
              </div>
            </div>
          </section>
        </main>
        """),
    )


def _management_message(message: str | None) -> SafeHtml:
    if not message:
        return trusted("")
    return trusted(
        f"""
        <div class="alert alert-info mb-0 rounded-0 border-start-0 border-end-0" role="status">
          <div class="container">{escape(message)}</div>
        </div>
        """
    )


def _dashboard_password_panel(management_slug: str, csrf_token: str, password_enabled: bool) -> SafeHtml:
    password_status = "Enabled" if password_enabled else "Not enabled"
    password_action = "Change password" if password_enabled else "Set password"
    remove_form = ""
    if password_enabled:
        remove_form = f"""
          <form class="dashboard-card dashboard-form-card" method="post" action="/m/{attr(management_slug)}/password/remove">
            <input type="hidden" name="csrf" value="{attr(csrf_token)}">
            <label class="form-label" for="dashboard-remove-current-password">Current password</label>
            <input class="form-control" id="dashboard-remove-current-password" name="current_dashboard_password" type="password" autocomplete="current-password" required>
            <button class="btn btn-outline-danger rounded-pill" type="submit">Remove password</button>
          </form>
        """
    current_password_field = ""
    if password_enabled:
        current_password_field = """
                  <div>
                    <label class="form-label" for="dashboard-current-password">Current password</label>
                    <input class="form-control" id="dashboard-current-password" name="current_dashboard_password" type="password" autocomplete="current-password" required>
                  </div>
        """
    return trusted(
        f"""
        <section class="dashboard-section">
          <div class="container">
            <div class="dashboard-settings-grid">
              <div>
                <p class="eyebrow">Dashboard password</p>
                <h2>Password protection</h2>
                <p class="section-copy">Status: {escape(password_status)}. This password protects only this dashboard. Router updates still work.</p>
              </div>
              <div class="d-grid gap-3">
                <form class="dashboard-card dashboard-form-card" method="post" action="/m/{attr(management_slug)}/password">
                  <input type="hidden" name="csrf" value="{attr(csrf_token)}">
                  {current_password_field}
                  <div>
                    <label class="form-label" for="dashboard-password">{escape(password_action)}</label>
                    <input class="form-control" id="dashboard-password" name="dashboard_password" type="password" autocomplete="new-password" minlength="8" required>
                  </div>
                  <div>
                    <label class="form-label" for="dashboard-password-confirm">Confirm password</label>
                    <input class="form-control" id="dashboard-password-confirm" name="dashboard_password_confirm" type="password" autocomplete="new-password" minlength="8" required>
                  </div>
                  <div class="d-flex gap-2 flex-wrap">
                    <button class="btn btn-primary rounded-pill" type="submit">{escape(password_action)}</button>
                  </div>
                </form>
                {remove_form}
              </div>
            </div>
          </div>
        </section>
        """
    )


def _render_management_unlock_page(
    management_slug: str,
    account: dict[str, str | int | None],
    csrf_token: str,
    message: str | None = None,
) -> str:
    hostname = escape(account["hostname"])
    message_html = ""
    if message:
        message_html = f'<div class="alert alert-warning" role="alert">{escape(message)}</div>'
    return _page(
        "Unlock KarlDNS management",
        trusted(f"""
        <main id="main">
          {_top_nav()}
          <section class="hero-band compact">
            <div class="container text-center d-grid justify-items-center gap-3">
              <p class="eyebrow">Dashboard locked</p>
              <h1>{hostname}</h1>
              <p class="lead">Enter the dashboard password for this hostname.</p>
            </div>
          </section>
          <section class="section">
            <div class="container narrow">
              {message_html}
              <form class="card card-body gap-3" method="post" action="/m/{attr(management_slug)}/unlock">
                <input type="hidden" name="csrf" value="{attr(csrf_token)}">
                <div>
                  <label class="form-label" for="dashboard-unlock-password">Dashboard password</label>
                  <input class="form-control" id="dashboard-unlock-password" name="dashboard_password" type="password" autocomplete="current-password" required autofocus>
                </div>
                <label class="form-check d-flex align-items-center gap-2">
                  <input class="form-check-input" type="checkbox" name="stay_unlocked" value="1">
                  <span class="form-check-label">Remember this browser for 30 days</span>
                </label>
                <button class="btn btn-primary rounded-pill" type="submit">Unlock</button>
              </form>
            </div>
          </section>
        </main>
        """),
    )


def _user_event_row(event: dict[str, str | int | None]) -> str:
    created = escape(event.get("created_at") or "-")
    raw_status = str(event.get("status") or "")
    status = escape(_event_label(raw_status))
    badge_class = attr(_event_badge_class(raw_status))
    ipv4 = escape(event.get("ipv4") or "-")
    ipv6 = escape(event.get("ipv6") or "-")
    count = escape(event.get("count") or 1)
    detail = escape(event.get("detail") or "-")
    return f'<tr><td>{created}</td><td><span class="status-badge {badge_class}">{status}</span></td><td>{ipv4}</td><td>{ipv6}</td><td>{count}</td><td>{detail}</td></tr>'


def _event_badge_class(status: str) -> str:
    if status in {"updated", "dashboard_hostname_activated", "unchanged"}:
        return "status-badge-ok"
    if "failed" in status or "failure" in status:
        return "status-badge-error"
    return "status-badge-neutral"