import { useState } from "react";
import { useQuery } from "@tanstack/react-query";
import { userListOptions } from "../lib/queries/users";
import { useAlert } from "../context/AlertContext";
import { useAuth } from "../context/AuthContext";
import Forbidden from "../components/Forbidden";
import { useNavigate, Link } from "react-router-dom";
import { motion } from "framer-motion";

import AdminDatePicker from "../components/AdminDatePicker";
import FormField from "../components/FormField";
import apiFetch from "../utils/api";
import { Skeleton } from "boneyard-js/react";
import AttendanceCreateFixture from "../fixtures/AttendanceCreateFixture";
const API_BASE = "/api/admin";

interface User {
  id: number | string;
  name: string;
}

interface CreateForm {
  user_id: string;
  shift_date: string;
  leave_type: string;
  leave_hours: number;
  arrival_date: string;
  arrival_time: string;
  break_start_date: string;
  break_start_time: string;
  break_end_date: string;
  break_end_time: string;
  departure_date: string;
  departure_time: string;
  notes: string;
}

export default function AttendanceCreate() {
  const alert = useAlert();
  const { hasPermission } = useAuth();
  const navigate = useNavigate();
  const { data: usersData, isPending: loading } = useQuery(userListOptions());
  const users = (usersData as unknown as User[] | undefined) ?? [];
  const [submitting, setSubmitting] = useState(false);

  const [form, setForm] = useState<CreateForm>(() => {
    const today = new Date().toISOString().split("T")[0];
    return {
      user_id: "",
      shift_date: today,
      leave_type: "work",
      leave_hours: 8,
      arrival_date: today,
      arrival_time: "",
      break_start_date: today,
      break_start_time: "",
      break_end_date: today,
      break_end_time: "",
      departure_date: today,
      departure_time: "",
      notes: "",
    };
  });

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();

    if (!form.user_id || !form.shift_date) {
      alert.error("Vyplňte zaměstnance a datum směny");
      return;
    }

    setSubmitting(true);

    try {
      const response = await apiFetch(`${API_BASE}/attendance`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(form),
      });

      const result = await response.json();

      if (result.success) {
        alert.success(result.message);
        navigate(`/attendance/admin?month=${form.shift_date.substring(0, 7)}`);
      } else {
        alert.error(result.error);
      }
    } catch {
      alert.error("Chyba připojení");
    } finally {
      setSubmitting(false);
    }
  };

  const handleShiftDateChange = (newDate: string) => {
    setForm({
      ...form,
      shift_date: newDate,
      arrival_date: newDate,
      break_start_date: newDate,
      break_end_date: newDate,
      departure_date: newDate,
    });
  };

  const isWorkType = form.leave_type === "work";

  if (!hasPermission("attendance.admin")) return <Forbidden />;

  return (
    <Skeleton
      name="attendance-create"
      loading={loading}
      fixture={<AttendanceCreateFixture />}
    >
      <div>
        <motion.div
          className="admin-page-header"
          initial={{ opacity: 0, y: 12 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ duration: 0.25 }}
        >
          <div>
            <h1 className="admin-page-title">Přidat záznam docházky</h1>
          </div>
          <div className="admin-page-actions">
            <Link
              to="/attendance/admin"
              className="admin-btn admin-btn-secondary"
            >
              &larr; Zpět na správu
            </Link>
          </div>
        </motion.div>

        <motion.div
          className="admin-card"
          style={{ maxWidth: "600px" }}
          initial={{ opacity: 0, y: 12 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ duration: 0.25, delay: 0.06 }}
        >
          <div className="admin-card-body">
            <form onSubmit={handleSubmit} className="admin-form">
              <div className="admin-form-row">
                <FormField label="Zaměstnanec" required>
                  <select
                    value={form.user_id}
                    onChange={(e) =>
                      setForm({ ...form, user_id: e.target.value })
                    }
                    className="admin-form-select"
                    required
                  >
                    <option value="">Vyberte zaměstnance</option>
                    {users.map((user) => (
                      <option key={user.id} value={user.id}>
                        {user.name}
                      </option>
                    ))}
                  </select>
                </FormField>
                <FormField label="Datum směny" required>
                  <AdminDatePicker
                    mode="date"
                    value={form.shift_date}
                    onChange={(val: string) => handleShiftDateChange(val)}
                    required
                  />
                </FormField>
              </div>

              <FormField label="Typ záznamu" required>
                <select
                  value={form.leave_type}
                  onChange={(e) =>
                    setForm({ ...form, leave_type: e.target.value })
                  }
                  className="admin-form-select"
                >
                  <option value="work">Práce</option>
                  <option value="vacation">Dovolená</option>
                  <option value="sick">Nemoc</option>
                  <option value="holiday">Svátek</option>
                  <option value="unpaid">Neplacené volno</option>
                </select>
              </FormField>

              {!isWorkType && (
                <FormField label="Počet hodin">
                  <input
                    type="number"
                    value={form.leave_hours}
                    onChange={(e) =>
                      setForm({
                        ...form,
                        leave_hours: parseFloat(e.target.value),
                      })
                    }
                    min="0.5"
                    max="24"
                    step="0.5"
                    className="admin-form-input"
                  />
                  <small className="admin-form-hint">
                    Výchozí 8 hodin pro celý den
                  </small>
                </FormField>
              )}

              {isWorkType && (
                <>
                  <div className="admin-form-row">
                    <FormField label="Příchod - datum">
                      <AdminDatePicker
                        mode="date"
                        value={form.arrival_date}
                        onChange={(val: string) =>
                          setForm({ ...form, arrival_date: val })
                        }
                      />
                    </FormField>
                    <FormField label="Příchod - čas">
                      <AdminDatePicker
                        mode="time"
                        value={form.arrival_time}
                        onChange={(val: string) =>
                          setForm({ ...form, arrival_time: val })
                        }
                      />
                    </FormField>
                  </div>

                  <div className="admin-form-row">
                    <FormField label="Začátek pauzy - datum">
                      <AdminDatePicker
                        mode="date"
                        value={form.break_start_date}
                        onChange={(val: string) =>
                          setForm({ ...form, break_start_date: val })
                        }
                      />
                    </FormField>
                    <FormField label="Začátek pauzy - čas">
                      <AdminDatePicker
                        mode="time"
                        value={form.break_start_time}
                        onChange={(val: string) =>
                          setForm({ ...form, break_start_time: val })
                        }
                      />
                    </FormField>
                  </div>

                  <div className="admin-form-row">
                    <FormField label="Konec pauzy - datum">
                      <AdminDatePicker
                        mode="date"
                        value={form.break_end_date}
                        onChange={(val: string) =>
                          setForm({ ...form, break_end_date: val })
                        }
                      />
                    </FormField>
                    <FormField label="Konec pauzy - čas">
                      <AdminDatePicker
                        mode="time"
                        value={form.break_end_time}
                        onChange={(val: string) =>
                          setForm({ ...form, break_end_time: val })
                        }
                      />
                    </FormField>
                  </div>

                  <div className="admin-form-row">
                    <FormField label="Odchod - datum">
                      <AdminDatePicker
                        mode="date"
                        value={form.departure_date}
                        onChange={(val: string) =>
                          setForm({ ...form, departure_date: val })
                        }
                      />
                    </FormField>
                    <FormField label="Odchod - čas">
                      <AdminDatePicker
                        mode="time"
                        value={form.departure_time}
                        onChange={(val: string) =>
                          setForm({ ...form, departure_time: val })
                        }
                      />
                    </FormField>
                  </div>
                </>
              )}

              <FormField label="Poznámka">
                <textarea
                  value={form.notes}
                  onChange={(e) => setForm({ ...form, notes: e.target.value })}
                  className="admin-form-textarea"
                  rows={3}
                />
              </FormField>

              <div className="admin-form-actions">
                <Link
                  to="/attendance/admin"
                  className="admin-btn admin-btn-secondary"
                >
                  Zrušit
                </Link>
                <button
                  type="submit"
                  disabled={submitting}
                  className="admin-btn admin-btn-primary"
                >
                  {submitting ? "Ukládám..." : "Uložit"}
                </button>
              </div>
            </form>
          </div>
        </motion.div>
      </div>
    </Skeleton>
  );
}