import {
  type CreatePostInput,
  createPostInputSchema,
  type UpdatePostInput,
  updatePostInputSchema,
} from "@cms/content"
import { type CrudAuditHook, type CrudMutationContext, createCrudService } from "@cms/crud"
import { z } from "zod"
import type { Post } from "../prisma/generated/client/client"

import { db } from "./client"

const postRepository = {
  list: () =>
    db.post.findMany({
      orderBy: {
        updatedAt: "desc",
      },
    }),
  findById: (id: string) =>
    db.post.findUnique({
      where: { id },
    }),
  create: (input: CreatePostInput) =>
    db.post.create({
      data: input,
    }),
  update: (id: string, input: UpdatePostInput) =>
    db.post.update({
      where: { id },
      data: input,
    }),
  delete: (id: string) =>
    db.post.delete({
      where: { id },
    }),
}

const supportedLocaleSchema = z.enum(["de", "en", "es", "fr"])
const upsertPostTranslationInputSchema = z.object({
  postId: z.string().uuid(),
  locale: supportedLocaleSchema,
  title: z.string().min(3).max(180),
  excerpt: z.string().max(320).nullable().optional(),
  body: z.string().min(1),
})

const postAuditHooks: Array<CrudAuditHook<Post>> = []

const postCrudService = createCrudService({
  resource: "post",
  repository: postRepository,
  schemas: {
    create: createPostInputSchema,
    update: updatePostInputSchema,
  },
  auditHooks: postAuditHooks,
})

export function registerPostCrudAuditHook(hook: CrudAuditHook<Post>): () => void {
  postAuditHooks.push(hook)

  return () => {
    const index = postAuditHooks.indexOf(hook)

    if (index >= 0) {
      postAuditHooks.splice(index, 1)
    }
  }
}

export async function listPosts() {
  return postCrudService.list()
}

export async function getPostById(id: string) {
  return postCrudService.getById(id)
}

export async function getPostBySlug(slug: string) {
  return db.post.findUnique({
    where: { slug },
  })
}

export async function getPostBySlugForLocale(slug: string, locale: string) {
  const normalizedLocale = supportedLocaleSchema.safeParse(locale).data
  const post = await db.post.findUnique({
    where: { slug },
    include: {
      translations: normalizedLocale
        ? {
            where: {
              locale: normalizedLocale,
            },
            take: 1,
          }
        : false,
    },
  })

  if (!post) {
    return null
  }

  const translation = post.translations?.[0]

  return {
    ...post,
    title: translation?.title ?? post.title,
    excerpt: translation?.excerpt ?? post.excerpt,
    body: translation?.body ?? post.body,
  }
}

export async function listPostsForLocale(locale: string) {
  const normalizedLocale = supportedLocaleSchema.safeParse(locale).data
  const posts = await db.post.findMany({
    where: {
      status: "published",
    },
    orderBy: {
      updatedAt: "desc",
    },
    include: {
      translations: normalizedLocale
        ? {
            where: { locale: normalizedLocale },
            take: 1,
          }
        : false,
    },
  })

  return posts.map((post) => {
    const translation = post.translations?.[0]

    return {
      ...post,
      title: translation?.title ?? post.title,
      excerpt: translation?.excerpt ?? post.excerpt,
      body: translation?.body ?? post.body,
    }
  })
}

export async function listPostsWithTranslations() {
  return db.post.findMany({
    orderBy: {
      updatedAt: "desc",
    },
    include: {
      translations: {
        orderBy: [{ locale: "asc" }],
      },
    },
  })
}

export async function upsertPostTranslation(input: unknown) {
  const payload = upsertPostTranslationInputSchema.parse(input)
  const { postId, locale, ...data } = payload

  return db.postTranslation.upsert({
    where: {
      postId_locale: {
        postId,
        locale,
      },
    },
    create: {
      postId,
      locale,
      ...data,
    },
    update: data,
  })
}

export async function createPost(input: unknown, context?: CrudMutationContext) {
  return postCrudService.create(input, context)
}

export async function updatePost(id: string, input: unknown, context?: CrudMutationContext) {
  return postCrudService.update(id, input, context)
}

export async function deletePost(id: string, context?: CrudMutationContext) {
  return postCrudService.delete(id, context)
}