import { RagService } from '#services/rag_service'
import { EmbedFileJob } from '#jobs/embed_file_job'
import { inject } from '@adonisjs/core'
import type { HttpContext } from '@adonisjs/core/http'
import app from '@adonisjs/core/services/app'
import { randomBytes } from 'node:crypto'
import { sanitizeFilename } from '../utils/fs.js'
import { getJobStatusSchema } from '#validators/rag'

@inject()
export default class RagController {
  constructor(private ragService: RagService) {}

  public async upload({ request, response }: HttpContext) {
    const uploadedFile = request.file('file')
    if (!uploadedFile) {
      return response.status(400).json({ error: 'No file uploaded' })
    }

    const randomSuffix = randomBytes(6).toString('hex')
    const sanitizedName = sanitizeFilename(uploadedFile.clientName)

    const fileName = `${sanitizedName}-${randomSuffix}.${uploadedFile.extname || 'txt'}`
    const fullPath = app.makePath(RagService.UPLOADS_STORAGE_PATH, fileName)

    await uploadedFile.move(app.makePath(RagService.UPLOADS_STORAGE_PATH), {
      name: fileName,
    })

    // Dispatch background job for embedding
    const result = await EmbedFileJob.dispatch({
      filePath: fullPath,
      fileName,
    })

    return response.status(202).json({
      message: result.message,
      jobId: result.jobId,
      fileName,
      filePath: `/${RagService.UPLOADS_STORAGE_PATH}/${fileName}`,
      alreadyProcessing: !result.created,
    })
  }

  public async getJobStatus({ request, response }: HttpContext) {
    const reqData = await request.validateUsing(getJobStatusSchema)

    const fullPath = app.makePath(RagService.UPLOADS_STORAGE_PATH, reqData.filePath)
    const status = await EmbedFileJob.getStatus(fullPath)

    if (!status.exists) {
      return response.status(404).json({ error: 'Job not found for this file' })
    }

    return response.status(200).json(status)
  }

  public async getStoredFiles({ response }: HttpContext) {
    const files = await this.ragService.getStoredFiles()
    return response.status(200).json({ files })
  }
}