import { useState } from 'react';
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import { toast } from 'sonner';
import { Loader2, Trash2, UserPlus } from 'lucide-react';
import { apiClient } from '@/lib/api';
import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog';
import { Label } from '@/components/ui/label';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';

// 三级权限：大白话描述，普通操作员无需理解术语
export const LEVEL_OPTIONS = [
  { value: 'viewer', label: '查看', desc: '只能看流水线与发布成功/失败日志' },
  { value: 'operator', label: '发布', desc: '查看 + 触发构建、批量发布、失败重试' },
  { value: 'owner', label: '管理', desc: '发布 + 编辑流水线配置、管理成员' },
];

export function levelLabel(level: string): string {
  return LEVEL_OPTIONS.find((l) => l.value === level)?.label ?? level;
}

export const levelBadgeStyle: Record<string, { bg: string; color: string }> = {
  viewer: { bg: '#f6f8fa', color: '#6e7781' },
  operator: { bg: '#ddf4ff', color: '#0969da' },
  owner: { bg: '#dafbe1', color: '#1a7f37' },
};

interface Props {
  pipelineId: number;
  pipelineName?: string;
  open: boolean;
  onClose: () => void;
}

// 单流水线成员弹窗：直接添加成员（选用户 + 点选等级），命中的权限组只读展示
export default function PipelineMembersDialog({ pipelineId, pipelineName, open, onClose }: Props) {
  const queryClient = useQueryClient();
  const [username, setUsername] = useState('');
  const [level, setLevel] = useState('operator');

  const membersQuery = useQuery({
    queryKey: ['pipeline-members', pipelineId],
    queryFn: () => apiClient.listPipelineMembers(pipelineId),
    enabled: open,
  });
  const { data: users } = useQuery({
    queryKey: ['users'],
    queryFn: apiClient.listUsers,
    enabled: open,
  });

  const invalidate = () => queryClient.invalidateQueries({ queryKey: ['pipeline-members', pipelineId] });

  const addMutation = useMutation({
    mutationFn: () => apiClient.addPipelineMember(pipelineId, { username, level }),
    onSuccess: () => {
      toast.success(`已授权 ${username}`);
      setUsername('');
      invalidate();
    },
    onError: (err: Error) => toast.error(err.message),
  });

  const removeMutation = useMutation({
    mutationFn: (mid: any) => apiClient.deletePipelineMember(pipelineId, mid),
    onSuccess: () => {
      toast.success('已移除授权');
      invalidate();
    },
    onError: (err: Error) => toast.error(err.message),
  });

  const members: any[] = membersQuery.data?.members ?? [];
  const matchedRoles: any[] = membersQuery.data?.matchedRoles ?? [];
  const userOptions: any[] = users ?? [];

  const submit = () => {
    if (!username) {
      toast.error('请选择用户');
      return;
    }
    addMutation.mutate();
  };

  const inputStyle = { background: 'var(--panel-bg-secondary)', borderColor: 'var(--border-color-light)' };

  return (
    <Dialog open={open} onOpenChange={(v) => !v && onClose()}>
      <DialogContent className="max-w-lg">
        <DialogHeader>
          <DialogTitle className="text-[15px]">成员授权 — {pipelineName || `流水线 #${pipelineId}`}</DialogTitle>
        </DialogHeader>

        {/* 添加成员 */}
        <div className="space-y-3">
          <div className="grid grid-cols-2 gap-3">
            <div className="space-y-1.5">
              <Label className="text-[12px]" style={{ color: 'var(--text-secondary)' }}>用户</Label>
              <Select value={username} onValueChange={setUsername}>
                <SelectTrigger className="h-8 text-[12px]" style={inputStyle}>
                  <SelectValue placeholder="选择用户" />
                </SelectTrigger>
                <SelectContent>
                  {userOptions.map((u) => (
                    <SelectItem key={u.id} value={u.username} className="text-[12px]">
                      {u.username}{u.nickname ? `（${u.nickname}）` : ''}
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
            </div>
            <div className="space-y-1.5">
              <Label className="text-[12px]" style={{ color: 'var(--text-secondary)' }}>权限等级</Label>
              <div className="flex gap-1">
                {LEVEL_OPTIONS.map((opt) => (
                  <button
                    key={opt.value}
                    type="button"
                    onClick={() => setLevel(opt.value)}
                    className="flex-1 h-8 text-[12px] rounded-md border transition-colors"
                    style={
                      level === opt.value
                        ? { background: 'var(--accent-blue-light)', borderColor: 'var(--accent-blue)', color: 'var(--accent-blue)', fontWeight: 600 }
                        : { background: 'var(--panel-bg-secondary)', borderColor: 'var(--border-color-light)', color: 'var(--text-secondary)' }
                    }
                    title={opt.desc}
                  >
                    {opt.label}
                  </button>
                ))}
              </div>
            </div>
          </div>
          <div className="text-[11px]" style={{ color: 'var(--text-tertiary)' }}>
            {LEVEL_OPTIONS.find((l) => l.value === level)?.desc}
          </div>
          <button
            className="flex items-center gap-1.5 px-3 py-1.5 text-[12px] font-medium rounded-md text-white disabled:opacity-60"
            style={{ background: 'var(--accent-blue)' }}
            disabled={addMutation.isPending}
            onClick={submit}
          >
            {addMutation.isPending ? <Loader2 className="w-3.5 h-3.5 animate-spin" /> : <UserPlus className="w-3.5 h-3.5" />}
            添加授权
          </button>
        </div>

        {/* 已有直接授权 */}
        <div className="space-y-1.5">
          <div className="text-[12px] font-medium" style={{ color: 'var(--text-secondary)' }}>直接授权（{members.length}）</div>
          {membersQuery.isLoading ? (
            <div className="flex items-center gap-2 py-3 text-[12px]" style={{ color: 'var(--text-tertiary)' }}>
              <Loader2 className="w-3.5 h-3.5 animate-spin" /> 加载中...
            </div>
          ) : members.length === 0 ? (
            <div className="py-2 text-[12px]" style={{ color: 'var(--text-tertiary)' }}>暂无直接授权成员</div>
          ) : (
            <div className="rounded-md border overflow-hidden" style={{ borderColor: 'var(--border-color-light)' }}>
              {members.map((m) => {
                const badge = levelBadgeStyle[m.level] ?? levelBadgeStyle.viewer;
                return (
                  <div
                    key={m.id}
                    className="flex items-center justify-between px-3 py-2 border-b last:border-b-0"
                    style={{ borderColor: 'var(--border-color-light)' }}
                  >
                    <div className="flex items-center gap-2">
                      <span className="text-[13px] font-mono" style={{ color: 'var(--text-primary)' }}>{m.username}</span>
                      <span className="text-[11px] px-2 py-[2px] rounded font-medium" style={{ background: badge.bg, color: badge.color }}>
                        {levelLabel(m.level)}
                      </span>
                    </div>
                    <button
                      className="p-1 rounded hover:bg-black/5"
                      title="移除授权"
                      disabled={removeMutation.isPending}
                      onClick={() => removeMutation.mutate(m.id)}
                    >
                      <Trash2 className="w-3.5 h-3.5" style={{ color: 'var(--text-tertiary)' }} />
                    </button>
                  </div>
                );
              })}
            </div>
          )}
        </div>

        {/* 命中的权限组（只读） */}
        {matchedRoles.length > 0 && (
          <div className="space-y-1.5">
            <div className="text-[12px] font-medium" style={{ color: 'var(--text-secondary)' }}>命中的权限组（只读，在「流水线权限」页管理）</div>
            <div className="flex flex-wrap gap-1.5">
              {matchedRoles.map((r, i) => {
                const badge = levelBadgeStyle[r.level] ?? levelBadgeStyle.viewer;
                return (
                  <span
                    key={i}
                    className="text-[11px] px-2 py-1 rounded border"
                    style={{ borderColor: 'var(--border-color-light)', color: 'var(--text-secondary)' }}
                    title={r.mode === 'pattern' ? `名称匹配：${r.pattern}` : '手动选择的流水线'}
                  >
                    {r.name} · {r.mode === 'pattern' ? r.pattern : '多选'} ·{' '}
                    <span style={{ color: badge.color }}>{levelLabel(r.level)}</span>
                  </span>
                );
              })}
            </div>
          </div>
        )}
      </DialogContent>
    </Dialog>
  );
}