import { useQuery } from "@tanstack/react-query";
import {
  getTableColumns,
  getTableConstraints,
  getTableIndexes,
} from "@/lib/tauri";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";
import { Badge } from "@/components/ui/badge";
import { ScrollArea } from "@/components/ui/scroll-area";

interface Props {
  connectionId: string;
  schema: string;
  table: string;
}

export function TableStructure({ connectionId, schema, table }: Props) {
  const { data: columns } = useQuery({
    queryKey: ["table-columns", connectionId, schema, table],
    queryFn: () => getTableColumns(connectionId, schema, table),
  });

  const { data: constraints } = useQuery({
    queryKey: ["table-constraints", connectionId, schema, table],
    queryFn: () => getTableConstraints(connectionId, schema, table),
  });

  const { data: indexes } = useQuery({
    queryKey: ["table-indexes", connectionId, schema, table],
    queryFn: () => getTableIndexes(connectionId, schema, table),
  });

  return (
    <Tabs defaultValue="columns" className="flex h-full flex-col">
      <TabsList className="mx-2 mt-2 w-fit">
        <TabsTrigger value="columns" className="text-xs">
          Columns{columns ? ` (${columns.length})` : ""}
        </TabsTrigger>
        <TabsTrigger value="constraints" className="text-xs">
          Constraints{constraints ? ` (${constraints.length})` : ""}
        </TabsTrigger>
        <TabsTrigger value="indexes" className="text-xs">
          Indexes{indexes ? ` (${indexes.length})` : ""}
        </TabsTrigger>
      </TabsList>

      <TabsContent value="columns" className="flex-1 overflow-hidden mt-0">
        <ScrollArea className="h-full">
          <Table>
            <TableHeader>
              <TableRow>
                <TableHead className="text-xs">#</TableHead>
                <TableHead className="text-xs">Name</TableHead>
                <TableHead className="text-xs">Type</TableHead>
                <TableHead className="text-xs">Nullable</TableHead>
                <TableHead className="text-xs">Default</TableHead>
                <TableHead className="text-xs">Key</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {columns?.map((col) => (
                <TableRow key={col.name}>
                  <TableCell className="text-xs text-muted-foreground">
                    {col.ordinal_position}
                  </TableCell>
                  <TableCell className="text-xs font-medium">
                    {col.name}
                  </TableCell>
                  <TableCell className="text-xs">
                    {col.data_type}
                    {col.character_maximum_length
                      ? `(${col.character_maximum_length})`
                      : ""}
                  </TableCell>
                  <TableCell className="text-xs">
                    {col.is_nullable ? "YES" : "NO"}
                  </TableCell>
                  <TableCell className="max-w-[200px] truncate text-xs text-muted-foreground">
                    {col.column_default ?? "—"}
                  </TableCell>
                  <TableCell>
                    {col.is_primary_key && (
                      <Badge variant="outline" className="text-[10px]">
                        PK
                      </Badge>
                    )}
                  </TableCell>
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </ScrollArea>
      </TabsContent>

      <TabsContent value="constraints" className="flex-1 overflow-hidden mt-0">
        <ScrollArea className="h-full">
          <Table>
            <TableHeader>
              <TableRow>
                <TableHead className="text-xs">Name</TableHead>
                <TableHead className="text-xs">Type</TableHead>
                <TableHead className="text-xs">Columns</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {constraints?.map((c) => (
                <TableRow key={c.name}>
                  <TableCell className="text-xs font-medium">
                    {c.name}
                  </TableCell>
                  <TableCell>
                    <Badge variant="secondary" className="text-[10px]">
                      {c.constraint_type}
                    </Badge>
                  </TableCell>
                  <TableCell className="text-xs">
                    {c.columns.join(", ")}
                  </TableCell>
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </ScrollArea>
      </TabsContent>

      <TabsContent value="indexes" className="flex-1 overflow-hidden mt-0">
        <ScrollArea className="h-full">
          <Table>
            <TableHeader>
              <TableRow>
                <TableHead className="text-xs">Name</TableHead>
                <TableHead className="text-xs">Definition</TableHead>
                <TableHead className="text-xs">Unique</TableHead>
                <TableHead className="text-xs">Primary</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {indexes?.map((idx) => (
                <TableRow key={idx.name}>
                  <TableCell className="text-xs font-medium">
                    {idx.name}
                  </TableCell>
                  <TableCell className="max-w-[400px] truncate text-xs text-muted-foreground">
                    {idx.definition}
                  </TableCell>
                  <TableCell className="text-xs">
                    {idx.is_unique ? "YES" : "NO"}
                  </TableCell>
                  <TableCell className="text-xs">
                    {idx.is_primary ? "YES" : "NO"}
                  </TableCell>
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </ScrollArea>
      </TabsContent>
    </Tabs>
  );
}