// 项目设置面板（提案 2026-09-30-cross-session-reading）：首个项目级设置 UI。
// schema 驱动渲染 project scope（4.9 覆盖链：system → user → project），
// 写 putProjectSettings；后续项目级设置项经 settings schema 自动出现，零开发。
import { useEffect, useMemo, useState } from 'react'
import { api } from '../api'
import { store, useStore } from '../store'
import type { SettingDesc } from '../contracts'
import { SettingsShell, Btn, EmptyState } from '@ui'
import { SettingInput, flatten, unflatten, groupNames } from './SettingsModal'
import { RdmMembersSection, RdmDutiesSection, RdmPermMatrixSection } from './adminRdmSections'
import { rdmProjectReadError } from '../rdmManagement'
import { projectActionError, projectWorkError } from '../projectmeta'

export function ProjectSettingsModal() {
  const projectId = useStore(s => s.ui.projectSettingsId)
  const projects = useStore(s => s.projects)
  const project = projects.find(p => p.id === projectId)
  const rdmMembersAvailable = useStore(s => s.rdmMembersAvailable)
  const rdmDocReviewAvailable = useStore(s => s.rdmDocReviewAvailable)
  const rdmPermMatrixAvailable = useStore(s => s.rdmPermMatrixAvailable)
  const owner = useStore(s => s.me?.owner)
  const [tab, setTab] = useState('project')
  const [schema, setSchema] = useState<SettingDesc[]>([])
  const [draft, setDraft] = useState<Record<string, any>>({})
  const [loaded, setLoaded] = useState(false)
  const [saved, setSaved] = useState(false)
  const [error, setError] = useState('')

  useEffect(() => {
    if (!projectId) return
    let active = true
    setLoaded(false); setSaved(false); setError(''); setDraft({}); setSchema([])
    api.getSettings(projectId).then(s => {
      if (!active) return
      setSchema(s.schema)
      setDraft(flatten(s.project))
      setLoaded(true)
    }).catch(() => { if (active) setError('项目设置未能加载，请关闭后重新打开或联系项目负责人') })
    return () => { active = false }
  }, [projectId, owner])

  const groups = useMemo(() => {
    const g: Record<string, SettingDesc[]> = {}
    for (const d of schema) (g[d.group] ??= []).push(d)
    return g
  }, [schema])

  if (!projectId) return null
  const rdmError = rdmProjectReadError(project)
  const writeError = projectWorkError(project)
  const rdmTab = tab === 'members' || tab === 'duties' || tab === 'matrix'

  const save = async () => {
    if (!projectId) return
    if (writeError) { store.toast(writeError); return }
    try {
      await api.putProjectSettings(projectId, unflatten(draft))
      setSaved(true)
      setTimeout(() => setSaved(false), 1500)
    } catch (e) {
      store.toast(`项目设置保存失败：${projectActionError(e)}`)
    }
  }

  return (
    <SettingsShell
      title={`项目设置 · ${project?.name ?? projectId}`}
      active={tab}
      onSelect={setTab}
      onClose={() => store.openProjectSettings(null)}
      sections={[
        { key: 'project', label: '本项目', icon: 'folder' },
        // U6/KTD5：成员与文档职责页签按 RDM 命令面门控（普通基座不出现）。
        ...(rdmMembersAvailable ? [{ key: 'members', label: '成员', icon: 'users' as const }] : []),
        ...(rdmDocReviewAvailable ? [{ key: 'duties', label: '文档职责 · 整文审签', icon: 'shield' as const }] : []),
        ...(rdmPermMatrixAvailable ? [{ key: 'matrix', label: '项目权限', icon: 'key' as const }] : []),
      ]}
      footer={saved ? <span style={{ color: 'var(--ok-text)' }}>✓ 已保存</span> : '项目设置覆盖用户设置（new-run 类对新任务生效）'}
    >
      <div>
        {rdmTab && rdmError ? <EmptyState icon="folder">{rdmError}</EmptyState> : project && <>
          {tab === 'members' && <RdmMembersSection key={project.id} project={project} />}
          {tab === 'duties' && <RdmDutiesSection key={project.id} project={project} />}
          {tab === 'matrix' && <RdmPermMatrixSection key={project.id} project={project} />}
        </>}
        {tab !== 'members' && tab !== 'duties' && tab !== 'matrix' && !loaded ? (
          <EmptyState icon="settings">{error || '加载中…'}</EmptyState>
        ) : tab !== 'members' && tab !== 'duties' && tab !== 'matrix' ? (
          <>
            <div className="empty-note" style={{ marginBottom: 10 }}>
              {writeError ?? '此处仅保存本项目的覆盖值；留空即沿用用户/系统设置。跨会话读取在「会话协作」组。'}
            </div>
            {Object.entries(groups).map(([g, descs]) => (
              <div className="settings-group" key={g}>
                <h4>{groupNames[g] ?? g}</h4>
                {descs.map(d => (
                  <div className="setting-row" key={d.key}>
                    <label title={d.key}>{d.label}</label>
                    <SettingInput desc={d} value={draft[d.key] ?? ''} onChange={v => setDraft(x => ({ ...x, [d.key]: v }))} />
                    <span className={`effect-badge effect-${d.effect}`} title={`生效时机：${d.effect}`}>
                      {d.effect === 'hot' ? '立即' : d.effect === 'new-run' ? '新任务' : '需重启'}
                    </span>
                  </div>
                ))}
              </div>
            ))}
            <Btn variant="primary" icon="check" disabled={!!writeError} onClick={save}>保存项目设置</Btn>
          </>
        ) : null}
      </div>
    </SettingsShell>
  )
}