// Shared UI primitives extracted from ConfigPage.tsx
import { useState, type ReactNode } from 'react'
import { X, Plus, Trash2 } from 'lucide-react'
import { inputCls } from './constants'
import type { KnownSource } from './types'

export function Field({ label, children, hint }: { label: string; children: ReactNode; hint?: string }) {
  return (
    <div className="space-y-1.5">
      <label className="block text-[13px] font-medium text-[var(--text-secondary)]">{label}</label>
      {children}
      {hint && <p className="text-xs text-[var(--text-muted)]">{hint}</p>}
    </div>
  )
}

export function Toggle({ checked, onChange }: { checked: boolean; onChange: (v: boolean) => void }) {
  return (
    <button
      type="button"
      onClick={() => onChange(!checked)}
      className={`relative inline-flex h-6 w-11 shrink-0 rounded-full transition-colors duration-200 ${checked ? 'bg-[var(--accent-cyan)]' : 'bg-[var(--bg-hover)]'}`}
    >
      <span className={`absolute top-0.5 left-0.5 h-5 w-5 rounded-full bg-white shadow-sm transition-transform duration-200 ${checked ? 'translate-x-5' : 'translate-x-0'}`} />
    </button>
  )
}

export function TagEditor({ tags, onChange }: { tags: string[]; onChange: (t: string[]) => void }) {
  const [input, setInput] = useState('')
  const add = () => { const v = input.trim(); if (v && !tags.includes(v)) { onChange([...tags, v]); setInput('') } }
  return (
    <div className="space-y-2">
      <div className="flex flex-wrap gap-1.5">
        {tags.map((t, i) => (
          <span key={t} className="inline-flex items-center gap-1 px-2 py-0.5 rounded-md bg-[var(--accent-cyan)]/10 border border-[var(--accent-cyan)]/20 text-xs text-[var(--accent-cyan)]">
            {t}
            <button onClick={() => onChange(tags.filter((_, j) => j !== i))} className="hover:text-white transition-colors"><X className="h-3 w-3" /></button>
          </span>
        ))}
      </div>
      <div className="flex gap-2">
        <input value={input} onChange={e => setInput(e.target.value)} onKeyDown={e => e.key === 'Enter' && (e.preventDefault(), add())} placeholder="输入后按 Enter" className={inputCls + ' !text-xs'} />
        <button onClick={add} className="px-2 py-1 rounded-lg bg-[var(--accent-cyan)]/10 text-[var(--accent-cyan)] hover:bg-[var(--accent-cyan)]/20 transition-colors text-xs">
          <Plus className="h-3.5 w-3.5" />
        </button>
      </div>
    </div>
  )
}

export function SectionCard({ title, subtitle, children }: { title: string; subtitle?: string; children: ReactNode }) {
  return (
    <div className="rounded-xl border border-[var(--border-color)] bg-[var(--bg-secondary)]/60 overflow-hidden">
      <div className="px-4 py-2.5 border-b border-[var(--border-color)] bg-[var(--bg-tertiary)]/30">
        <div className="flex items-center gap-2">
          <h3 className="text-sm font-medium text-[var(--text-secondary)]">{title}</h3>
          {subtitle && <span className="text-[10px] text-[var(--text-muted)] bg-[var(--bg-tertiary)] px-1.5 py-0.5 rounded">{subtitle}</span>}
        </div>
      </div>
      <div className="p-4 space-y-4">{children}</div>
    </div>
  )
}

export function SourceEditor({
  sources,
  onChange,
  knownSources,
  examplePaths,
  showCustom = true,
}: {
  sources: string[]
  onChange: (s: string[]) => void
  knownSources: KnownSource[]
  examplePaths?: string[]
  showCustom?: boolean
}) {
  const [customInput, setCustomInput] = useState('')
  const knownKeys = new Set(knownSources.map(k => k.key))
  const customPaths = sources.filter(s => !knownKeys.has(s))

  const toggleKnown = (key: string) => {
    if (sources.includes(key)) {
      onChange(sources.filter(s => s !== key))
    } else {
      onChange([...sources, key])
    }
  }

  const addCustom = () => {
    const v = customInput.trim()
    if (v && !sources.includes(v)) {
      onChange([...sources, v])
      setCustomInput('')
    }
  }

  const removeCustom = (path: string) => {
    onChange(sources.filter(s => s !== path))
  }

  return (
    <div className="space-y-4">
      {/* Known sources as toggles */}
      <div className="space-y-2">
        {knownSources.map(src => (
          <div key={src.key} className="flex items-center justify-between py-1.5">
            <div className="flex-1 min-w-0">
              <div className="text-sm text-[var(--text-primary)]">{src.label}</div>
              <div className="text-xs text-[var(--text-muted)] font-mono">{src.description}</div>
            </div>
            <Toggle checked={sources.includes(src.key)} onChange={() => toggleKnown(src.key)} />
          </div>
        ))}
      </div>

      {/* Custom paths (only shown when showCustom is true) */}
      {showCustom && (
        <div className="space-y-2">
          <div className="text-xs font-medium text-[var(--text-muted)] uppercase tracking-wider">自定义路径</div>
          {customPaths.length > 0 && (
            <div className="flex flex-wrap gap-1.5">
              {customPaths.map((p) => (
                <span key={p} className="inline-flex items-center gap-1 px-2 py-0.5 rounded-md bg-[var(--accent-cyan)]/10 border border-[var(--accent-cyan)]/20 text-xs text-[var(--accent-cyan)] font-mono">
                  {p}
                  <button onClick={() => removeCustom(p)} className="hover:text-white transition-colors"><X className="h-3 w-3" /></button>
                </span>
              ))}
            </div>
          )}
          <div className="flex gap-2">
            <input
              value={customInput}
              onChange={e => setCustomInput(e.target.value)}
              onKeyDown={e => e.key === 'Enter' && (e.preventDefault(), addCustom())}
              placeholder="输入绝对路径，如 D:\my-skills"
              className={inputCls + ' !text-xs font-mono'}
            />
            <button onClick={addCustom} className="px-2 py-1 rounded-lg bg-[var(--accent-cyan)]/10 text-[var(--accent-cyan)] hover:bg-[var(--accent-cyan)]/20 transition-colors text-xs shrink-0">
              <Plus className="h-3.5 w-3.5" />
            </button>
          </div>
          {examplePaths && (
            <p className="text-xs text-[var(--text-muted)]">
              示例: {examplePaths.join('、')}
            </p>
          )}
        </div>
      )}
    </div>
  )
}

export function MapEntryHeader({ name, onDelete, onRename }: { name: string; onDelete: () => void; onRename?: (n: string) => void }) {
  const [editing, setEditing] = useState(false)
  const [val, setVal] = useState(name)
  return (
    <div className="flex items-center gap-2 px-4 py-2 bg-[var(--bg-tertiary)]/50 border-b border-[var(--border-color)]">
      {editing ? (
        <input value={val} onChange={e => setVal(e.target.value)} onBlur={() => { setEditing(false); onRename?.(val.trim() || name) }} onKeyDown={e => e.key === 'Enter' && (setEditing(false), onRename?.(val.trim() || name))} className={inputCls + ' !py-1 !text-xs max-w-[200px]'} autoFocus />
      ) : (
        <span className="text-sm font-mono text-[var(--accent-cyan)] cursor-pointer" onClick={() => onRename && setEditing(true)}>{name}</span>
      )}
      <div className="flex-1" />
      <button onClick={onDelete} className="p-1 rounded text-red-400/60 hover:text-red-400 hover:bg-red-500/10 transition-colors"><Trash2 className="h-3.5 w-3.5" /></button>
    </div>
  )
}