"use client"

import { useState, useCallback } from "react"
import { useQueryClient } from "@tanstack/react-query"
import api from "@/lib/api"
import { toast } from "sonner"

interface LibraryPathResponse {
  id: string
  is_ingest_destination: boolean
}

interface UploadProgress {
  file: string
  progress: number
  done: boolean
}

export function useUpload(onComplete?: () => void) {
  const qc = useQueryClient()
  const [uploads, setUploads] = useState<UploadProgress[]>([])
  const [isUploading, setIsUploading] = useState(false)

  const upload = useCallback(
    async (files: File[]) => {
      setIsUploading(true)
      const initial = files.map((f) => ({
        file: f.name,
        progress: 0,
        done: false,
      }))
      setUploads(initial)

      let targetPathId: string | null = null
      try {
        const { data } = await api.get<LibraryPathResponse[]>(
          "/storage/library-paths",
        )
        const dest = data.find((p) => p.is_ingest_destination)
        targetPathId = dest?.id ?? data[0]?.id ?? null
      } catch {
        toast.error("No ingest destination configured")
        setIsUploading(false)
        return
      }

      if (!targetPathId) {
        toast.error("No ingest destination configured")
        setIsUploading(false)
        return
      }

      let succeeded = 0
      let failed = 0
      for (let i = 0; i < files.length; i++) {
        try {
          const form = new FormData()
          form.append("file", files[i])
          form.append("target_path_id", targetPathId)
          await api.post("/assets/ingest", form, {
            onUploadProgress: (e) => {
              const pct = e.total ? Math.round((e.loaded * 100) / e.total) : 0
              setUploads((prev) =>
                prev.map((u, j) => (j === i ? { ...u, progress: pct } : u)),
              )
            },
          })
          setUploads((prev) =>
            prev.map((u, j) =>
              j === i ? { ...u, progress: 100, done: true } : u,
            ),
          )
          succeeded++
        } catch {
          failed++
        }
      }

      if (succeeded > 0) toast.success(`Uploaded ${succeeded} file(s)`)
      if (failed > 0) toast.error(`${failed} upload(s) failed`)

      await qc.invalidateQueries({ queryKey: ["timeline"] })
      setIsUploading(false)
      onComplete?.()
    },
    [onComplete, qc],
  )

  return { uploads, isUploading, upload }
}