'use client'

import { useState, useEffect } from 'react'
import { roomRequiresTypeApi, roomUnavailableApi, subjectsApi, roomsApi } from '@/lib/stundenplan/api'
import type {
  RoomRequiresType, RoomUnavailable,
  TimetableSubject, TimetableRoom,
} from '@/app/stundenplan/types'
import { useConstraintCrud, ConstraintShell, useShellStyles, DAYS, dayLabel } from './_shell'

// ---------- Room Requires Type (Subject → required room_type) ----------

type ReqForm = Omit<RoomRequiresType, 'id' | 'created_by_user_id' | 'created_at'>
const initialReq: ReqForm = { subject_id: '', room_type: '', is_hard: true, weight: 100, active: true, note: '' }

export function RoomRequiresTypeEditor() {
  const styles = useShellStyles()
  const [subjects, setSubjects] = useState<TimetableSubject[]>([])
  const crud = useConstraintCrud<RoomRequiresType, ReqForm>(roomRequiresTypeApi, initialReq)

  useEffect(() => { subjectsApi.list().then(setSubjects).catch(() => setSubjects([])) }, [])

  const sLabel = (id: string): string => {
    const s = subjects.find(x => x.id === id); return s ? s.name : id.slice(0, 8) + '…'
  }

  return (
    <ConstraintShell
      testId="room-requires-type-editor"
      title="Fach: benoetigter Raumtyp"
      description={"Beispiel: Sport braucht immer Sporthalle."}
      newLabel="+ Neue Regel"
      newDisabled={subjects.length === 0}
      prereqWarning={subjects.length === 0 ? 'Zuerst Faecher anlegen.' : null}
      emptyText="Keine Regeln vorhanden."
      tableHeaders={['Fach', 'Raumtyp', 'Hart', 'Weight']}
      state={crud}
      formBody={
        <div className="grid grid-cols-1 md:grid-cols-4 gap-3">
          <div>
            <label className="block text-sm mb-1 opacity-70">Fach</label>
            <select required value={crud.form.subject_id} onChange={e => crud.setForm({ ...crud.form, subject_id: e.target.value })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`}>
              <option value="">— bitte waehlen —</option>
              {subjects.map(s => <option key={s.id} value={s.id}>{s.name}</option>)}
            </select>
          </div>
          <div>
            <label className="block text-sm mb-1 opacity-70">Raumtyp</label>
            <input required value={crud.form.room_type} onChange={e => crud.setForm({ ...crud.form, room_type: e.target.value })} placeholder="z.B. Sporthalle" className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`} />
          </div>
          <div>
            <label className="block text-sm mb-1 opacity-70">Weight (0-100)</label>
            <input type="number" min={0} max={100} value={crud.form.weight} onChange={e => crud.setForm({ ...crud.form, weight: parseInt(e.target.value) || 0 })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`} />
          </div>
          <div className="flex items-center gap-2">
            <input type="checkbox" id="is_hard_rrt" checked={crud.form.is_hard} onChange={e => crud.setForm({ ...crud.form, is_hard: e.target.checked })} className="w-5 h-5" />
            <label htmlFor="is_hard_rrt" className="text-sm">Harte Regel</label>
          </div>
          <div className="md:col-span-4 flex items-end">
            <button type="submit" disabled={crud.submitting} className={styles.submitBtn}>{crud.submitting ? 'Speichert...' : 'Anlegen'}</button>
          </div>
        </div>
      }
      renderRow={(item) => {
        const c = item as RoomRequiresType
        return (
          <tr key={c.id} className={styles.rowClass}>
            <td className="px-4 py-3 font-medium">{sLabel(c.subject_id)}</td>
            <td className="px-4 py-3">{c.room_type}</td>
            <td className="px-4 py-3">{c.is_hard ? '✓' : '—'}</td>
            <td className="px-4 py-3">{c.weight}</td>
            <td className="px-4 py-3 text-right"><button onClick={() => crud.remove(c.id)} className={styles.deleteBtn}>Loeschen</button></td>
          </tr>
        )
      }}
    />
  )
}

// ---------- Room Unavailable ----------

type UnavForm = Omit<RoomUnavailable, 'id' | 'created_by_user_id' | 'created_at'>
const initialUnav: UnavForm = { room_id: '', day_of_week: 1, period_index: 1, is_hard: true, weight: 100, active: true, note: '' }

export function RoomUnavailableEditor() {
  const styles = useShellStyles()
  const [rooms, setRooms] = useState<TimetableRoom[]>([])
  const crud = useConstraintCrud<RoomUnavailable, UnavForm>(roomUnavailableApi, initialUnav)

  useEffect(() => { roomsApi.list().then(setRooms).catch(() => setRooms([])) }, [])

  const rLabel = (id: string): string => {
    const r = rooms.find(x => x.id === id); return r ? r.name : id.slice(0, 8) + '…'
  }

  return (
    <ConstraintShell
      testId="room-unavailable-editor"
      title="Raum: nicht verfuegbar"
      description={"Beispiel: Sporthalle Di 5. Stunde Wartung."}
      newLabel="+ Neue Regel"
      newDisabled={rooms.length === 0}
      prereqWarning={rooms.length === 0 ? 'Zuerst Raeume anlegen.' : null}
      emptyText="Keine Regeln vorhanden."
      tableHeaders={['Raum', 'Tag', 'Stunde', 'Hart', 'Weight']}
      state={crud}
      formBody={
        <div className="grid grid-cols-1 md:grid-cols-4 gap-3">
          <div>
            <label className="block text-sm mb-1 opacity-70">Raum</label>
            <select required value={crud.form.room_id} onChange={e => crud.setForm({ ...crud.form, room_id: e.target.value })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`}>
              <option value="">— bitte waehlen —</option>
              {rooms.map(r => <option key={r.id} value={r.id}>{r.name}</option>)}
            </select>
          </div>
          <div>
            <label className="block text-sm mb-1 opacity-70">Wochentag</label>
            <select value={crud.form.day_of_week} onChange={e => crud.setForm({ ...crud.form, day_of_week: parseInt(e.target.value) })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`}>
              {DAYS.map(d => <option key={d.v} value={d.v}>{d.label}</option>)}
            </select>
          </div>
          <div>
            <label className="block text-sm mb-1 opacity-70">Stunde (1-12)</label>
            <input type="number" min={1} max={12} required value={crud.form.period_index} onChange={e => crud.setForm({ ...crud.form, period_index: parseInt(e.target.value) || 1 })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`} />
          </div>
          <div>
            <label className="block text-sm mb-1 opacity-70">Weight (0-100)</label>
            <input type="number" min={0} max={100} value={crud.form.weight} onChange={e => crud.setForm({ ...crud.form, weight: parseInt(e.target.value) || 0 })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`} />
          </div>
          <div className="flex items-center gap-2">
            <input type="checkbox" id="is_hard_ru" checked={crud.form.is_hard} onChange={e => crud.setForm({ ...crud.form, is_hard: e.target.checked })} className="w-5 h-5" />
            <label htmlFor="is_hard_ru" className="text-sm">Harte Regel</label>
          </div>
          <div className="md:col-span-3 flex items-end">
            <button type="submit" disabled={crud.submitting} className={styles.submitBtn}>{crud.submitting ? 'Speichert...' : 'Anlegen'}</button>
          </div>
        </div>
      }
      renderRow={(item) => {
        const c = item as RoomUnavailable
        return (
          <tr key={c.id} className={styles.rowClass}>
            <td className="px-4 py-3 font-medium">{rLabel(c.room_id)}</td>
            <td className="px-4 py-3">{dayLabel(c.day_of_week)}</td>
            <td className="px-4 py-3">{c.period_index}.</td>
            <td className="px-4 py-3">{c.is_hard ? '✓' : '—'}</td>
            <td className="px-4 py-3">{c.weight}</td>
            <td className="px-4 py-3 text-right"><button onClick={() => crud.remove(c.id)} className={styles.deleteBtn}>Loeschen</button></td>
          </tr>
        )
      }}
    />
  )
}