import { NextResponse } from "next/server";
import prisma from "@/lib/prisma";
import { z } from "zod";

const createPostSchema = z.object({
  boardId: z.string().min(1),
  authorId: z.string().optional(),
  title: z.string().min(1),
  content: z.string().min(1),
  isAnonymous: z.boolean().optional(),
});

export async function POST(req: Request) {
  const body = await req.json();
  const parsed = createPostSchema.safeParse(body);
  if (!parsed.success) {
    return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
  }
  const { boardId, authorId, title, content, isAnonymous } = parsed.data;
  const board = await prisma.board.findUnique({ where: { id: boardId } });
  const requiresApproval = board?.requiresApproval ?? false;
  const post = await prisma.post.create({
    data: {
      boardId,
      authorId: authorId ?? null,
      title,
      content,
      isAnonymous: !!isAnonymous,
      status: requiresApproval ? "hidden" : "published",
    },
  });
  return NextResponse.json({ post }, { status: 201 });
}

const listQuerySchema = z.object({
  page: z.coerce.number().min(1).default(1),
  pageSize: z.coerce.number().min(1).max(100).default(10),
  boardId: z.string().optional(),
  q: z.string().optional(),
  sort: z.enum(["recent", "popular"]).default("recent").optional(),
});

export async function GET(req: Request) {
  const { searchParams } = new URL(req.url);
  const parsed = listQuerySchema.safeParse(Object.fromEntries(searchParams));
  if (!parsed.success) {
    return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
  }
  const { page, pageSize, boardId, q, sort = "recent" } = parsed.data;
  const where = {
    ...(boardId ? { boardId } : {}),
    ...(q
      ? {
          OR: [
            { title: { contains: q } },
            { content: { contains: q } },
          ],
        }
      : {}),
  } as const;

  const [total, items] = await Promise.all([
    prisma.post.count({ where }),
    prisma.post.findMany({
      where,
      orderBy:
        sort === "popular"
          ? [{ isPinned: "desc" }, { stat: { recommendCount: "desc" } }, { createdAt: "desc" }]
          : [{ isPinned: "desc" }, { createdAt: "desc" }],
      skip: (page - 1) * pageSize,
      take: pageSize,
      select: {
        id: true,
        title: true,
        createdAt: true,
        boardId: true,
        isPinned: true,
        status: true,
        stat: { select: { recommendCount: true, views: true, commentsCount: true } },
      },
    }),
  ]);

  return NextResponse.json({ total, page, pageSize, items, sort });
}