import type { ToolConfig, ToolResponse, WorkflowToolExecutionContext } from '@/tools/types'

interface FileAppendParams {
  fileName: string
  content: string
  workspaceId?: string
  _context?: WorkflowToolExecutionContext
}

export const fileAppendTool: ToolConfig<FileAppendParams, ToolResponse> = {
  id: 'file_append',
  name: 'File Append',
  description:
    'Append content to an existing workspace file. The file must already exist. Content is added to the end of the file.',
  version: '1.0.0',

  params: {
    fileName: {
      type: 'string',
      required: true,
      visibility: 'user-or-llm',
      description: 'Name of an existing workspace file to append to.',
    },
    content: {
      type: 'string',
      required: true,
      visibility: 'user-or-llm',
      description: 'The text content to append to the file.',
    },
  },

  request: {
    url: '/api/tools/file/manage',
    method: 'POST',
    headers: () => ({ 'Content-Type': 'application/json' }),
    body: (params) => ({
      operation: 'append',
      fileName: params.fileName,
      content: params.content,
      workspaceId: params.workspaceId || params._context?.workspaceId,
    }),
  },

  transformResponse: async (response) => {
    const data = await response.json()
    if (!response.ok || !data.success) {
      return { success: false, output: {}, error: data.error || 'Failed to append to file' }
    }
    return { success: true, output: data.data }
  },

  outputs: {
    id: { type: 'string', description: 'File ID' },
    name: { type: 'string', description: 'File name' },
    size: { type: 'number', description: 'File size in bytes' },
    url: { type: 'string', description: 'URL to access the file', optional: true },
  },
}