import type { Message } from 'ai'

export async function useChatFile() {
  const toast = useToast()
  async function loadChat(slug: string): Promise<Message[]> {
    if (!slug) {
      throw createError({
        statusCode: 400,
        statusMessage: 'Slug is required',
        message: 'Slug is required',
      })
    }
  
    const { blobs } = await $fetch('/api/files')
  
    if (!blobs.find(item => item.pathname === `chats/${slug}.json`)) {
      await createChat(slug)
    }
  
    const data = await $fetch<string>(`/api/chats/${slug}`)
    const dataString = JSON.stringify(data)
  
    if (dataString === '[]')
      return []
    return JSON.parse(dataString)
  }
  
  async function createChat(slug: string) {
    await $fetch('/api/chats', {
      method: 'POST',
      body: {
        file: {
          name: `${slug}.json`,
          content: '[]',
        },
      },
    })
  }
  
  async function deleteChat(slug: string) {
    await $fetch('/api/files', {
      method: 'DELETE',
      body: {
        pathname: `chats/${slug}.json`,
      },
    })
  }
  
  return {
    loadChat,
    createChat,
    deleteChat,
  }

}