from __future__ import annotations

from collections.abc import Mapping
from dataclasses import dataclass
from datetime import datetime

from .components import _event_label
from .html_utils import attr, escape


@dataclass(frozen=True, slots=True)
class _AdminEventRow:
    created_raw: str
    hostname_raw: str
    detail_raw: str
    created: str
    hostname: str
    status: str
    ipv4: str
    ipv6: str
    count: str
    detail: str


def _admin_event_row_view(event: Mapping[str, object]) -> _AdminEventRow:
    created_raw = _event_text(event, "created_at")
    hostname_raw = _event_text(event, "hostname")
    detail_raw = _event_text(event, "detail")
    return _AdminEventRow(
        created_raw=created_raw,
        hostname_raw=hostname_raw,
        detail_raw=detail_raw,
        created=escape(_short_time(created_raw)),
        hostname=escape(hostname_raw),
        status=escape(_event_label(event.get("status"))),
        ipv4=escape(_event_text(event, "ipv4")),
        ipv6=escape(_event_text(event, "ipv6")),
        count=escape(event.get("count") or 1),
        detail=escape(detail_raw),
    )


def _event_text(event: Mapping[str, object], key: str) -> str:
    return str(event.get(key) or "-")


def _account_row(account: Mapping[str, object], csrf: str = "", admin_path: str = "/admin") -> str:
    raw_hostname = str(account["hostname"])
    hostname = escape(raw_hostname)
    hostname_attr = attr(raw_hostname)
    status = "Active" if account.get("accepted_at") else "Pending"
    ipv4_raw = str(account.get("ipv4") or "-")
    ipv6_raw = str(account.get("ipv6") or "-")
    updated_raw = str(account.get("updated_at") or "Never")
    ipv4 = escape(ipv4_raw)
    ipv6 = escape(ipv6_raw)
    updated = escape(_short_time(updated_raw, "Never"))
    safe_admin_path = attr(admin_path)
    return f"""
      <tr>
        <td class="cell-hostname" title="{hostname_attr}">{hostname}</td>
        <td class="cell-status">{escape(status)}</td>
        <td class="cell-ip" title="{attr(ipv4_raw)}">{ipv4}</td>
        <td class="cell-ip" title="{attr(ipv6_raw)}">{ipv6}</td>
        <td class="cell-time" title="{attr(updated_raw)}">{updated}</td>
        <td class="cell-actions">
          <form method="post" action="{safe_admin_path}/hostnames/rotate" class="admin-action-group">
            <input type="hidden" name="csrf" value="{attr(csrf)}">
            <input type="hidden" name="hostname" value="{hostname_attr}">
            <button name="action" value="update" class="btn btn-sm btn-light rounded-pill"
              title="Create a new update URL" aria-label="New update URL for {hostname_attr}">Update URL</button>
            <button name="action" value="management" class="btn btn-sm btn-light rounded-pill"
              title="Create a new dashboard link" aria-label="New dashboard link for {hostname_attr}">Dashboard</button>
          </form>
        </td>
        <td class="cell-delete">
          <form method="post" action="{safe_admin_path}/hostnames/delete">
            <input type="hidden" name="csrf" value="{attr(csrf)}">
            <input type="hidden" name="hostname" value="{hostname_attr}">
            <button class="btn btn-sm btn-outline-danger rounded-pill" title="Delete hostname"
              aria-label="Delete {hostname_attr}">Delete</button>
          </form>
        </td>
      </tr>
    """


def _admin_table_toolbar(table_id: str, search_label: str) -> str:
    safe_id = attr(table_id)
    safe_label = attr(search_label)
    return f"""
      <div class="admin-table-shell mt-3" data-admin-table>
        <div class="d-flex align-items-center justify-content-between gap-3 flex-column flex-md-row mb-3">
          <label class="w-100 mb-0" for="{safe_id}-search">
            <span class="visually-hidden">{safe_label}</span>
            <input id="{safe_id}-search" class="form-control" type="search" placeholder="{safe_label}"
              data-table-search autocomplete="off">
          </label>
          <div class="d-flex align-items-center gap-2 flex-shrink-0">
            <span class="small text-secondary text-nowrap" data-table-count>0-0 of 0</span>
            <label class="visually-hidden" for="{safe_id}-page-size">Rows per page</label>
            <select id="{safe_id}-page-size" class="form-select form-select-sm table-page-size" data-table-page-size>
              <option value="10">10</option>
              <option value="25" selected>25</option>
              <option value="50">50</option>
              <option value="100">100</option>
            </select>
          </div>
        </div>
    """


def _admin_table_pagination() -> str:
    return """
        <nav class="mt-3" aria-label="Table pagination">
          <ul class="pagination pagination-sm justify-content-end mb-0" data-table-pagination></ul>
        </nav>
      </div>
    """


def _event_row(event: Mapping[str, object]) -> str:
    row = _admin_event_row_view(event)
    return (
        f'<tr><td class="cell-time" title="{attr(row.created_raw)}">{row.created}</td>'
        f'<td class="cell-hostname" title="{attr(row.hostname_raw)}">{row.hostname}</td>'
        f'<td class="cell-status">{row.status}</td><td class="cell-ip">{row.ipv4}</td>'
        f'<td class="cell-ip">{row.ipv6}</td><td class="cell-count">{row.count}</td>'
        f'<td class="cell-detail" title="{attr(row.detail_raw)}">{row.detail}</td></tr>'
    )


def _short_time(value: str, fallback: str = "-") -> str:
    if not value or value == fallback:
        return fallback
    try:
        parsed = datetime.fromisoformat(value)
    except ValueError:
        return value
    return parsed.strftime("%Y-%m-%d %H:%M")