import { useState } from 'react';
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
import { Plus, Trash2 } from 'lucide-react';
import { deleteDimension, deleteTaxonomy, listDimensions, listTaxonomy, upsertDimension, upsertTaxonomy } from '@/lib/api';
import { Button, Card, CardHeader, Confirm, Input, useToast } from '@/components/ui';

const PALETTE = ['#3056d3', '#7c3aed', '#0891b2', '#16a34a', '#d97706', '#dc2626', '#db2777', '#64748b'];

export function TaxonomyPage() {
  return (
    <div className="mx-auto max-w-[1080px] px-6 py-5">
      <p className="mb-4 text-[12px] text-ink-3">
        字典驱动录入表单中的下拉选项；维度是自定义的成长分类轴，一条记录可挂多个维度。
      </p>
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
        <TaxonomyCard kind="level" title="级别字典" description="国际级、国家级、省市级等，可按学校口径增改" />
        <TaxonomyCard kind="role" title="角色字典" description="主导、核心、参加等参与角色" />
        <DimensionCard />
      </div>
    </div>
  );
}

function TaxonomyCard({ kind, title, description }: { kind: string; title: string; description: string }) {
  const qc = useQueryClient();
  const toast = useToast();
  const taxQ = useQuery({ queryKey: ['taxonomy-all'], queryFn: () => listTaxonomy() });
  const items = (taxQ.data?.items ?? []).filter(t => t.kind === kind).sort((a, b) => a.sort - b.sort);

  const [draft, setDraft] = useState('');
  const [deleting, setDeleting] = useState<{ id: number; value: string } | null>(null);

  const upMut = useMutation({
    mutationFn: upsertTaxonomy,
    onSuccess: () => void qc.invalidateQueries({ queryKey: ['taxonomy-all'] })
  });
  const delMut = useMutation({
    mutationFn: (id: number) => deleteTaxonomy(id),
    onSuccess: () => {
      void qc.invalidateQueries({ queryKey: ['taxonomy-all'] });
      toast('success', '已删除');
      setDeleting(null);
    },
    onError: (e: Error) => { toast('error', e.message); setDeleting(null); }
  });

  return (
    <Card>
      <CardHeader title={title} extra={<span className="text-[11px] text-ink-3">{description}</span>} />
      <div className="flex flex-col gap-1 p-3">
        {items.map((t, i) => (
          <div key={t.id} className="flex items-center gap-2 rounded-md px-1 py-1 hover:bg-surface-2">
            <input
              type="color"
              value={t.color ?? PALETTE[i % PALETTE.length]}
              className="size-5 cursor-pointer rounded border border-line bg-surface"
              onChange={e => upMut.mutate({ id: t.id, kind, value: t.value, color: e.target.value, sort: t.sort })}
            />
            <input
              className="h-7 flex-1 rounded border border-transparent bg-transparent px-1.5 text-[13px] text-ink-1 hover:border-line focus:border-brand focus:outline-none"
              value={t.value}
              onChange={() => {}}
              onBlur={e => {
                const v = e.target.value.trim();
                if (v && v !== t.value) upMut.mutate({ id: t.id, kind, value: v, color: t.color, sort: t.sort });
              }}
              key={t.value}
              defaultValue={t.value}
            />
            <span className="num w-14 text-right text-[11px] text-ink-3">#{t.sort}</span>
            {!t.is_builtin ? (
              <Button variant="ghost" size="icon-sm" aria-label="删除" onClick={() => setDeleting({ id: t.id, value: t.value })}>
                <Trash2 size={13} />
              </Button>
            ) : (
              <span className="w-7 text-center text-[11px] text-ink-3">内置</span>
            )}
          </div>
        ))}

        <div className="mt-1 flex items-center gap-2 border-t border-line pt-2">
          <Input
            className="flex-1"
            placeholder="新增条目，回车或点击按钮"
            value={draft}
            onChange={e => setDraft(e.target.value)}
            onKeyDown={e => {
              if (e.key === 'Enter' && draft.trim()) {
                upMut.mutate({ kind, value: draft.trim(), sort: (items.at(-1)?.sort ?? 0) + 10 });
                setDraft('');
              }
            }}
          />
          <Button
            size="sm"
            variant="secondary"
            disabled={!draft.trim()}
            onClick={() => {
              upMut.mutate({ kind, value: draft.trim(), sort: (items.at(-1)?.sort ?? 0) + 10 });
              setDraft('');
            }}
          >
            <Plus size={13} /> 添加
          </Button>
        </div>
      </div>

      <Confirm
        open={!!deleting}
        title="删除字典条目"
        content={deleting ? '确定删除「' + deleting.value + '」吗？' : ''}
        onCancel={() => setDeleting(null)}
        onOk={() => deleting && delMut.mutate(deleting.id)}
      />
    </Card>
  );
}

function DimensionCard() {
  const qc = useQueryClient();
  const toast = useToast();
  const dimsQ = useQuery({ queryKey: ['dimensions'], queryFn: listDimensions });
  const items = [...(dimsQ.data?.items ?? [])].sort((a, b) => a.sort - b.sort);
  const [draft, setDraft] = useState('');
  const [deleting, setDeleting] = useState<{ id: number; name: string } | null>(null);

  const upMut = useMutation({
    mutationFn: upsertDimension,
    onSuccess: () => void qc.invalidateQueries({ queryKey: ['dimensions'] })
  });
  const delMut = useMutation({
    mutationFn: (id: number) => deleteDimension(id),
    onSuccess: () => { void qc.invalidateQueries({ queryKey: ['dimensions'] }); toast('success', '已删除'); setDeleting(null); },
    onError: (e: Error) => { toast('error', e.message); setDeleting(null); }
  });

  return (
    <Card>
      <CardHeader title="成长维度" extra={<span className="text-[11px] text-ink-3">如：学业深造 / 职业发展 / 兴趣生活</span>} />
      <div className="flex flex-col gap-1 p-3">
        {items.map((d, i) => (
          <div key={d.id} className="flex items-center gap-2 rounded-md px-1 py-1 hover:bg-surface-2">
            <span className="size-3 rounded-full" style={{ backgroundColor: d.color ?? PALETTE[i % PALETTE.length] }} />
            <input
              className="h-7 flex-1 rounded border border-transparent bg-transparent px-1.5 text-[13px] text-ink-1 hover:border-line focus:border-brand focus:outline-none"
              key={d.name}
              defaultValue={d.name}
              onBlur={e => {
                const v = e.target.value.trim();
                if (v && v !== d.name) upMut.mutate({ id: d.id, name: v, color: d.color, sort: d.sort });
              }}
            />
            <Button variant="ghost" size="icon-sm" aria-label="删除" onClick={() => setDeleting({ id: d.id, name: d.name })}>
              <Trash2 size={13} />
            </Button>
          </div>
        ))}
        {!items.length && (
          <div className="py-2 text-center text-[12px] text-ink-3">尚未配置维度</div>
        )}

        <div className="mt-1 flex items-center gap-2 border-t border-line pt-2">
          <Input
            className="flex-1"
            placeholder="新增维度名称"
            value={draft}
            onChange={e => setDraft(e.target.value)}
            onKeyDown={e => {
              if (e.key === 'Enter' && draft.trim()) {
                upMut.mutate({ name: draft.trim(), sort: (items.at(-1)?.sort ?? 0) + 10 });
                setDraft('');
              }
            }}
          />
          <Button
            size="sm"
            variant="secondary"
            disabled={!draft.trim()}
            onClick={() => { upMut.mutate({ name: draft.trim(), sort: (items.at(-1)?.sort ?? 0) + 10 }); setDraft(''); }}
          >
            <Plus size={13} /> 添加
          </Button>
        </div>
      </div>

      <Confirm
        open={!!deleting}
        title="删除维度"
        content={deleting ? '确定删除「' + deleting.name + '」吗？记录与该维度的关联将一并移除。' : ''}
        onCancel={() => setDeleting(null)}
        onOk={() => deleting && delMut.mutate(deleting.id)}
      />
    </Card>
  );
}