// server/utils/plazaPosts.ts - 广场发布记录数据库操作：公开、取消公开和广场列表查询。
import type {
  IImagePublicStateData,
  IPlazaPostItem,
  IPlazaPostListData
} from "#shared/types/openai";
import {
  ImageGenerationStatus,
  PlazaPostStatus
} from "~~/app/generated/prisma/client";
import { prisma } from "~~/server/utils/prisma";

const ANONYMOUS_AUTHOR_NAME = "匿名用户";

export type PublishPlazaPostResult = IImagePublicStateData | null | "REMOVED";

export const publishImageGenerationToPlaza = async (
  userId: number,
  recordId: bigint
): Promise<PublishPlazaPostResult> => {
  const record = await prisma.imageGeneration.findFirst({
    where: {
      id: recordId,
      userId,
      deletedAt: null
    },
    select: {
      id: true,
      userId: true,
      plazaPost: {
        select: {
          status: true
        }
      }
    }
  });

  if (!record) return null;
  if (record.plazaPost?.status === PlazaPostStatus.REMOVED) return "REMOVED";

  await prisma.plazaPost.upsert({
    where: {
      imageGenerationId: record.id
    },
    create: {
      imageGenerationId: record.id,
      userId: record.userId,
      status: PlazaPostStatus.PUBLIC
    },
    update: {
      status: PlazaPostStatus.PUBLIC,
      hiddenAt: null,
      removedAt: null
    }
  });

  return {
    isPublic: true
  };
};

export const hideImageGenerationFromPlaza = async (
  userId: number,
  recordId: bigint
): Promise<IImagePublicStateData | null> => {
  const record = await prisma.imageGeneration.findFirst({
    where: {
      id: recordId,
      userId,
      deletedAt: null
    },
    select: {
      id: true
    }
  });

  if (!record) return null;

  const result = await prisma.plazaPost.updateMany({
    where: {
      imageGenerationId: record.id,
      userId,
      status: {
        not: PlazaPostStatus.REMOVED
      }
    },
    data: {
      status: PlazaPostStatus.HIDDEN,
      hiddenAt: new Date()
    }
  });

  if (result.count === 0) return null;

  return {
    isPublic: false
  };
};

export const listPlazaPosts = async ({
  page,
  pageSize
}: {
  page: number;
  pageSize: number;
}): Promise<IPlazaPostListData> => {
  const where = {
    status: PlazaPostStatus.PUBLIC,
    imageGeneration: {
      status: ImageGenerationStatus.SUCCEEDED,
      deletedAt: null,
      hostedImageUrl: {
        not: null
      }
    }
  };

  const [total, posts] = await Promise.all([
    prisma.plazaPost.count({ where }),
    prisma.plazaPost.findMany({
      where,
      include: {
        imageGeneration: {
          select: {
            id: true,
            prompt: true,
            hostedImageUrl: true
          }
        },
        user: {
          select: {
            displayName: true,
            username: true
          }
        }
      },
      orderBy: {
        publishedAt: "desc"
      },
      skip: (page - 1) * pageSize,
      take: pageSize
    })
  ]);

  return {
    page,
    pageSize,
    total,
    items: posts
      .map(mapPlazaPostItem)
      .filter((item): item is IPlazaPostItem => Boolean(item))
  };
};

const mapPlazaPostItem = (post: {
  id: bigint;
  publishedAt: Date;
  imageGeneration: {
    id: bigint;
    prompt: string;
    hostedImageUrl: string | null;
  };
  user: {
    displayName: string;
    username: string;
  };
}): IPlazaPostItem | null => {
  if (!post.imageGeneration.hostedImageUrl) return null;

  return {
    id: post.id.toString(),
    imageGenerationId: post.imageGeneration.id.toString(),
    prompt: post.imageGeneration.prompt,
    hostedImageUrl: post.imageGeneration.hostedImageUrl,
    authorDisplayName:
      post.user.displayName || post.user.username || ANONYMOUS_AUTHOR_NAME,
    publishedAt: post.publishedAt.toISOString()
  };
};