'use client'

import { useState } from 'react'
import { BookOpen, Trash2, Save, X } from 'lucide-react'
import { EMPTY_CONTROL, VERIFICATION_METHODS, CATEGORY_OPTIONS, TARGET_AUDIENCE_OPTIONS } from './helpers'

export function ControlForm({
  initial,
  onSave,
  onCancel,
  saving,
}: {
  initial: typeof EMPTY_CONTROL
  onSave: (data: typeof EMPTY_CONTROL) => void
  onCancel: () => void
  saving: boolean
}) {
  const [form, setForm] = useState(initial)
  const [tagInput, setTagInput] = useState(initial.tags.join(', '))
  const [platformInput, setPlatformInput] = useState((initial.scope.platforms || []).join(', '))
  const [componentInput, setComponentInput] = useState((initial.scope.components || []).join(', '))
  const [dataClassInput, setDataClassInput] = useState((initial.scope.data_classes || []).join(', '))

  const handleSave = () => {
    const data = {
      ...form,
      tags: tagInput.split(',').map(t => t.trim()).filter(Boolean),
      scope: {
        platforms: platformInput.split(',').map(t => t.trim()).filter(Boolean),
        components: componentInput.split(',').map(t => t.trim()).filter(Boolean),
        data_classes: dataClassInput.split(',').map(t => t.trim()).filter(Boolean),
      },
      requirements: form.requirements.filter(r => r.trim()),
      test_procedure: form.test_procedure.filter(r => r.trim()),
      evidence: form.evidence.filter(e => e.type.trim() || e.description.trim()),
      open_anchors: form.open_anchors.filter(a => a.framework.trim() || a.ref.trim()),
    }
    onSave(data)
  }

  return (
    <div className="max-w-4xl mx-auto p-6 space-y-6">
      <div className="flex items-center justify-between">
        <h2 className="text-lg font-semibold text-gray-900">
          {initial.control_id ? `Control ${initial.control_id} bearbeiten` : 'Neues Control erstellen'}
        </h2>
        <div className="flex items-center gap-2">
          <button onClick={onCancel} className="px-3 py-1.5 text-sm text-gray-600 border border-gray-300 rounded-lg hover:bg-gray-50">
            <X className="w-4 h-4 inline mr-1" />Abbrechen
          </button>
          <button onClick={handleSave} disabled={saving} className="px-3 py-1.5 text-sm text-white bg-purple-600 rounded-lg hover:bg-purple-700 disabled:opacity-50">
            <Save className="w-4 h-4 inline mr-1" />{saving ? 'Speichern...' : 'Speichern'}
          </button>
        </div>
      </div>

      {/* Basic fields */}
      <div className="grid grid-cols-2 gap-4">
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Control-ID *</label>
          <input
            value={form.control_id}
            onChange={e => setForm({ ...form, control_id: e.target.value.toUpperCase() })}
            placeholder="AUTH-003"
            disabled={!!initial.control_id}
            className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:outline-none disabled:bg-gray-100"
          />
          <p className="text-xs text-gray-400 mt-1">Format: DOMAIN-NNN (z.B. AUTH-003, NET-005)</p>
        </div>
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Titel *</label>
          <input
            value={form.title}
            onChange={e => setForm({ ...form, title: e.target.value })}
            placeholder="Control-Titel"
            className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:outline-none"
          />
        </div>
      </div>

      <div className="grid grid-cols-3 gap-4">
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Schweregrad</label>
          <select value={form.severity} onChange={e => setForm({ ...form, severity: e.target.value })} className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg">
            <option value="low">Niedrig</option>
            <option value="medium">Mittel</option>
            <option value="high">Hoch</option>
            <option value="critical">Kritisch</option>
          </select>
        </div>
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Risiko-Score (0-10)</label>
          <input
            type="number" min="0" max="10" step="0.5"
            value={form.risk_score ?? ''}
            onChange={e => setForm({ ...form, risk_score: e.target.value ? parseFloat(e.target.value) : null })}
            className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg"
          />
        </div>
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Aufwand</label>
          <select value={form.implementation_effort || ''} onChange={e => setForm({ ...form, implementation_effort: e.target.value || null })} className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg">
            <option value="">-</option>
            <option value="s">Klein (S)</option>
            <option value="m">Mittel (M)</option>
            <option value="l">Gross (L)</option>
            <option value="xl">Sehr gross (XL)</option>
          </select>
        </div>
      </div>

      {/* Objective & Rationale */}
      <div>
        <label className="block text-xs font-medium text-gray-600 mb-1">Ziel *</label>
        <textarea
          value={form.objective}
          onChange={e => setForm({ ...form, objective: e.target.value })}
          rows={3}
          className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:outline-none"
        />
      </div>
      <div>
        <label className="block text-xs font-medium text-gray-600 mb-1">Begruendung *</label>
        <textarea
          value={form.rationale}
          onChange={e => setForm({ ...form, rationale: e.target.value })}
          rows={3}
          className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:outline-none"
        />
      </div>

      {/* Scope */}
      <div className="grid grid-cols-3 gap-4">
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Plattformen (komma-getrennt)</label>
          <input value={platformInput} onChange={e => setPlatformInput(e.target.value)} placeholder="web, mobile, api" className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg" />
        </div>
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Komponenten (komma-getrennt)</label>
          <input value={componentInput} onChange={e => setComponentInput(e.target.value)} placeholder="auth-service, gateway" className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg" />
        </div>
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Datenklassen (komma-getrennt)</label>
          <input value={dataClassInput} onChange={e => setDataClassInput(e.target.value)} placeholder="credentials, tokens" className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg" />
        </div>
      </div>

      {/* Requirements */}
      <div>
        <div className="flex items-center justify-between mb-1">
          <label className="text-xs font-medium text-gray-600">Anforderungen</label>
          <button onClick={() => setForm({ ...form, requirements: [...form.requirements, ''] })} className="text-xs text-purple-600 hover:text-purple-800">+ Hinzufuegen</button>
        </div>
        {form.requirements.map((req, i) => (
          <div key={i} className="flex gap-2 mb-2">
            <span className="text-xs text-gray-400 mt-2.5">{i + 1}.</span>
            <input
              value={req}
              onChange={e => { const r = [...form.requirements]; r[i] = e.target.value; setForm({ ...form, requirements: r }) }}
              className="flex-1 px-3 py-2 text-sm border border-gray-300 rounded-lg"
            />
            <button onClick={() => setForm({ ...form, requirements: form.requirements.filter((_, j) => j !== i) })} className="text-red-400 hover:text-red-600">
              <Trash2 className="w-4 h-4" />
            </button>
          </div>
        ))}
      </div>

      {/* Test Procedure */}
      <div>
        <div className="flex items-center justify-between mb-1">
          <label className="text-xs font-medium text-gray-600">Pruefverfahren</label>
          <button onClick={() => setForm({ ...form, test_procedure: [...form.test_procedure, ''] })} className="text-xs text-purple-600 hover:text-purple-800">+ Hinzufuegen</button>
        </div>
        {form.test_procedure.map((step, i) => (
          <div key={i} className="flex gap-2 mb-2">
            <span className="text-xs text-gray-400 mt-2.5">{i + 1}.</span>
            <input
              value={step}
              onChange={e => { const t = [...form.test_procedure]; t[i] = e.target.value; setForm({ ...form, test_procedure: t }) }}
              className="flex-1 px-3 py-2 text-sm border border-gray-300 rounded-lg"
            />
            <button onClick={() => setForm({ ...form, test_procedure: form.test_procedure.filter((_, j) => j !== i) })} className="text-red-400 hover:text-red-600">
              <Trash2 className="w-4 h-4" />
            </button>
          </div>
        ))}
      </div>

      {/* Evidence */}
      <div>
        <div className="flex items-center justify-between mb-1">
          <label className="text-xs font-medium text-gray-600">Nachweisanforderungen</label>
          <button onClick={() => setForm({ ...form, evidence: [...form.evidence, { type: '', description: '' }] })} className="text-xs text-purple-600 hover:text-purple-800">+ Hinzufuegen</button>
        </div>
        {form.evidence.map((ev, i) => (
          <div key={i} className="flex gap-2 mb-2">
            <input
              value={ev.type}
              onChange={e => { const evs = [...form.evidence]; evs[i] = { ...evs[i], type: e.target.value }; setForm({ ...form, evidence: evs }) }}
              placeholder="Typ (z.B. config, test_result)"
              className="w-32 px-3 py-2 text-sm border border-gray-300 rounded-lg"
            />
            <input
              value={ev.description}
              onChange={e => { const evs = [...form.evidence]; evs[i] = { ...evs[i], description: e.target.value }; setForm({ ...form, evidence: evs }) }}
              placeholder="Beschreibung"
              className="flex-1 px-3 py-2 text-sm border border-gray-300 rounded-lg"
            />
            <button onClick={() => setForm({ ...form, evidence: form.evidence.filter((_, j) => j !== i) })} className="text-red-400 hover:text-red-600">
              <Trash2 className="w-4 h-4" />
            </button>
          </div>
        ))}
      </div>

      {/* Open Anchors */}
      <div className="bg-green-50 border border-green-200 rounded-lg p-4">
        <div className="flex items-center justify-between mb-2">
          <div className="flex items-center gap-2">
            <BookOpen className="w-4 h-4 text-green-700" />
            <label className="text-xs font-semibold text-green-900">Open-Source-Referenzen *</label>
          </div>
          <button onClick={() => setForm({ ...form, open_anchors: [...form.open_anchors, { framework: '', ref: '', url: '' }] })} className="text-xs text-green-700 hover:text-green-900">+ Hinzufuegen</button>
        </div>
        <p className="text-xs text-green-600 mb-3">Jedes Control braucht mindestens eine offene Referenz (OWASP, NIST, ENISA, etc.)</p>
        {form.open_anchors.map((anchor, i) => (
          <div key={i} className="flex gap-2 mb-2">
            <input
              value={anchor.framework}
              onChange={e => { const a = [...form.open_anchors]; a[i] = { ...a[i], framework: e.target.value }; setForm({ ...form, open_anchors: a }) }}
              placeholder="Framework (z.B. OWASP ASVS)"
              className="w-40 px-3 py-2 text-sm border border-green-200 rounded-lg bg-white"
            />
            <input
              value={anchor.ref}
              onChange={e => { const a = [...form.open_anchors]; a[i] = { ...a[i], ref: e.target.value }; setForm({ ...form, open_anchors: a }) }}
              placeholder="Referenz (z.B. V2.8)"
              className="w-48 px-3 py-2 text-sm border border-green-200 rounded-lg bg-white"
            />
            <input
              value={anchor.url}
              onChange={e => { const a = [...form.open_anchors]; a[i] = { ...a[i], url: e.target.value }; setForm({ ...form, open_anchors: a }) }}
              placeholder="https://..."
              className="flex-1 px-3 py-2 text-sm border border-green-200 rounded-lg bg-white"
            />
            <button onClick={() => setForm({ ...form, open_anchors: form.open_anchors.filter((_, j) => j !== i) })} className="text-red-400 hover:text-red-600">
              <Trash2 className="w-4 h-4" />
            </button>
          </div>
        ))}
      </div>

      {/* Tags & State */}
      <div className="grid grid-cols-2 gap-4">
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Tags (komma-getrennt)</label>
          <input value={tagInput} onChange={e => setTagInput(e.target.value)} placeholder="mfa, auth, iam" className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg" />
        </div>
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Status</label>
          <select value={form.release_state} onChange={e => setForm({ ...form, release_state: e.target.value })} className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg">
            <option value="draft">Draft</option>
            <option value="review">Review</option>
            <option value="approved">Approved</option>
            <option value="deprecated">Deprecated</option>
          </select>
        </div>
      </div>

      {/* Verification Method, Category & Target Audience */}
      <div className="grid grid-cols-3 gap-4">
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Nachweismethode</label>
          <select
            value={form.verification_method || ''}
            onChange={e => setForm({ ...form, verification_method: e.target.value || null })}
            className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg"
          >
            <option value="">— Nicht zugewiesen —</option>
            {Object.entries(VERIFICATION_METHODS).map(([k, v]) => (
              <option key={k} value={k}>{v.label}</option>
            ))}
          </select>
          <p className="text-xs text-gray-400 mt-1">Wie wird dieses Control nachgewiesen?</p>
        </div>
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Kategorie</label>
          <select
            value={form.category || ''}
            onChange={e => setForm({ ...form, category: e.target.value || null })}
            className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg"
          >
            <option value="">— Nicht zugewiesen —</option>
            {CATEGORY_OPTIONS.map(c => (
              <option key={c.value} value={c.value}>{c.label}</option>
            ))}
          </select>
        </div>
        <div>
          <label className="block text-xs font-medium text-gray-600 mb-1">Zielgruppe</label>
          <select
            value={form.target_audience || ''}
            onChange={e => setForm({ ...form, target_audience: e.target.value || null })}
            className="w-full px-3 py-2 text-sm border border-gray-300 rounded-lg"
          >
            <option value="">— Nicht zugewiesen —</option>
            {Object.entries(TARGET_AUDIENCE_OPTIONS).map(([k, v]) => (
              <option key={k} value={k}>{v.label}</option>
            ))}
          </select>
          <p className="text-xs text-gray-400 mt-1">Fuer wen ist dieses Control relevant?</p>
        </div>
      </div>
    </div>
  )
}