import { Link } from "react-router-dom";
import {
  formatDate,
  formatDatetime,
  formatTime,
  calculateWorkMinutes,
  formatMinutes,
  getLeaveTypeName,
  getLeaveTypeBadgeClass,
} from "../utils/attendanceHelpers";
import type { AttendanceRecord as HookAttendanceRecord } from "../hooks/useAttendanceAdmin";

interface AttendanceRecord extends HookAttendanceRecord {
  arrival_lat?: number | string | null;
  arrival_lng?: number | string | null;
  departure_lat?: number | string | null;
  departure_lng?: number | string | null;
}

interface AttendanceShiftTableProps {
  records: AttendanceRecord[];
  onEdit: (record: AttendanceRecord) => void;
  onDelete: (record: AttendanceRecord) => void;
}

function formatBreak(record: AttendanceRecord): string {
  if (record.break_start && record.break_end) {
    return `${formatTime(record.break_start)} - ${formatTime(record.break_end)}`;
  }
  if (record.break_start) {
    return `${formatTime(record.break_start)} - ?`;
  }
  return "—";
}

function renderProjectCell(record: AttendanceRecord): React.ReactNode {
  if (record.project_logs && record.project_logs.length > 0) {
    return (
      <div
        style={{ display: "flex", flexDirection: "column", gap: "0.125rem" }}
      >
        {record.project_logs.map((log, i) => {
          let h: number,
            m: number,
            isActive = false;
          let durationValid = true;
          if (log.hours !== null && log.hours !== undefined) {
            h = parseInt(String(log.hours)) || 0;
            m = parseInt(String(log.minutes)) || 0;
          } else {
            isActive = !log.ended_at;
            const end = log.ended_at ? new Date(log.ended_at) : new Date();
            const start = log.started_at ? new Date(log.started_at) : null;
            if (start && !isNaN(start.getTime()) && !isNaN(end.getTime())) {
              const mins = Math.max(
                0,
                Math.floor((end.getTime() - start.getTime()) / 60000),
              );
              h = Math.floor(mins / 60);
              m = mins % 60;
            } else {
              durationValid = false;
              h = 0;
              m = 0;
            }
          }
          return (
            <span
              key={log.id ?? i}
              className="admin-badge"
              style={{
                fontSize: "0.7rem",
                display: "inline-block",
                background: isActive ? "var(--accent-light)" : undefined,
              }}
            >
              {log.project_name || `#${log.project_id}`}{" "}
              {durationValid
                ? `(${h}:${String(m).padStart(2, "0")}h${isActive ? " ▸" : ""})`
                : "—"}
            </span>
          );
        })}
      </div>
    );
  }
  if (record.project_name) {
    return (
      <span
        className="admin-badge admin-badge-wrap"
        style={{ fontSize: "0.75rem" }}
      >
        {record.project_name}
      </span>
    );
  }
  return "—";
}

export default function AttendanceShiftTable({
  records,
  onEdit,
  onDelete,
}: AttendanceShiftTableProps) {
  if (records.length === 0) {
    return (
      <div className="admin-empty-state">
        <p>Za tento měsíc nejsou žádné záznamy.</p>
      </div>
    );
  }

  return (
    <div className="admin-table-responsive">
      <table className="admin-table">
        <thead>
          <tr>
            <th>Datum</th>
            <th>Zaměstnanec</th>
            <th>Typ</th>
            <th>Příchod</th>
            <th>Pauza</th>
            <th>Odchod</th>
            <th>Hodiny</th>
            <th>Projekt</th>
            <th>GPS</th>
            <th>Poznámka</th>
            <th>Akce</th>
          </tr>
        </thead>
        <tbody>
          {records.map((record) => {
            const leaveType = record.leave_type || "work";
            const isLeave = leaveType !== "work";
            const workMinutes = isLeave
              ? (record.leave_hours != null ? Number(record.leave_hours) : 8) *
                60
              : calculateWorkMinutes({
                  ...record,
                  notes: record.notes ?? undefined,
                });
            const hasLocation =
              (record.arrival_lat && record.arrival_lng) ||
              (record.departure_lat && record.departure_lng);

            return (
              <tr key={record.id}>
                <td className="admin-mono">{formatDate(record.shift_date)}</td>
                <td>{record.user_name}</td>
                <td>
                  <span
                    className={`attendance-leave-badge ${getLeaveTypeBadgeClass(leaveType)}`}
                  >
                    {getLeaveTypeName(leaveType)}
                  </span>
                </td>
                <td className="admin-mono">
                  {isLeave ? "—" : formatDatetime(record.arrival_time)}
                </td>
                <td className="admin-mono">
                  {isLeave ? "—" : formatBreak(record)}
                </td>
                <td className="admin-mono">
                  {isLeave ? "—" : formatDatetime(record.departure_time)}
                </td>
                <td className="admin-mono">
                  {workMinutes > 0 ? `${formatMinutes(workMinutes)} h` : "—"}
                </td>
                <td>{renderProjectCell(record)}</td>
                <td>
                  {hasLocation ? (
                    <Link
                      to={`/attendance/location/${record.id}`}
                      className="attendance-gps-link"
                      title="Zobrazit polohu"
                      aria-label="Zobrazit polohu"
                    >
                      <span aria-hidden="true">{"📍"}</span>
                    </Link>
                  ) : (
                    "—"
                  )}
                </td>
                <td
                  style={{
                    maxWidth: "100px",
                    overflow: "hidden",
                    textOverflow: "ellipsis",
                    whiteSpace: "nowrap",
                  }}
                  title={record.notes || ""}
                >
                  {record.notes || ""}
                </td>
                <td>
                  <div className="admin-table-actions">
                    <button
                      onClick={() => onEdit(record)}
                      className="admin-btn-icon"
                      title="Upravit"
                      aria-label="Upravit"
                    >
                      <svg
                        width="18"
                        height="18"
                        viewBox="0 0 24 24"
                        fill="none"
                        stroke="currentColor"
                        strokeWidth="2"
                      >
                        <path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7" />
                        <path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z" />
                      </svg>
                    </button>
                    <button
                      onClick={() => onDelete(record)}
                      className="admin-btn-icon danger"
                      title="Smazat"
                      aria-label="Smazat"
                    >
                      <svg
                        width="18"
                        height="18"
                        viewBox="0 0 24 24"
                        fill="none"
                        stroke="currentColor"
                        strokeWidth="2"
                      >
                        <polyline points="3 6 5 6 21 6" />
                        <path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2" />
                      </svg>
                    </button>
                  </div>
                </td>
              </tr>
            );
          })}
        </tbody>
      </table>
    </div>
  );
}