'use server'

import { revalidatePath } from 'next/cache'
import prisma from '@/lib/prisma'
import { auth } from '@/auth'
import { parseNote } from '@/lib/utils'
import { parseImageUrls, cleanupNoteImages, deleteImageFileSafely } from '@/lib/image-cleanup'
import { NOTE_LIST_SELECT } from '@/lib/note-select'

// Soft-delete a note (move to trash)
export async function deleteNote(id: string, options?: { skipRevalidation?: boolean }) {
  const session = await auth()
  if (!session?.user?.id) throw new Error('Unauthorized')

  try {
    await prisma.note.update({
      where: { id, userId: session.user.id },
      data: { trashedAt: new Date() }
    })
    if (!options?.skipRevalidation) {
      revalidatePath('/home')
    }
    return { success: true }
  } catch (error) {
    console.error('Error deleting note:', error)
    throw new Error('Failed to delete note')
  }
}

export async function trashNote(id: string, options?: { skipRevalidation?: boolean }) {
  const session = await auth()
  if (!session?.user?.id) throw new Error('Unauthorized')

  try {
    await prisma.note.update({
      where: { id, userId: session.user.id },
      data: { trashedAt: new Date() }
    })
    if (!options?.skipRevalidation) {
      revalidatePath('/home')
    }
    return { success: true }
  } catch (error) {
    console.error('Error trashing note:', error)
    throw new Error('Failed to trash note')
  }
}

export async function restoreNote(id: string) {
  const session = await auth()
  if (!session?.user?.id) throw new Error('Unauthorized')

  try {
    await prisma.note.update({
      where: { id, userId: session.user.id },
      data: { trashedAt: null }
    })
    revalidatePath('/home')
    revalidatePath('/trash')
    return { success: true }
  } catch (error) {
    console.error('Error restoring note:', error)
    throw new Error('Failed to restore note')
  }
}

export async function getTrashedNotes() {
  const session = await auth()
  if (!session?.user?.id) return []

  try {
    const notes = await prisma.note.findMany({
      where: {
        userId: session.user.id,
        trashedAt: { not: null }
      },
      select: NOTE_LIST_SELECT,
      orderBy: { trashedAt: 'desc' }
    })
    return notes.map(parseNote)
  } catch (error) {
    console.error('Error fetching trashed notes:', error)
    return []
  }
}

export async function permanentDeleteNote(id: string) {
  const session = await auth()
  if (!session?.user?.id) throw new Error('Unauthorized')

  try {
    const note = await prisma.note.findUnique({
      where: { id, userId: session.user.id },
      select: { images: true }
    })
    const imageUrls = parseImageUrls(note?.images ?? null)

    await prisma.note.delete({ where: { id, userId: session.user.id } })

    if (imageUrls.length > 0) {
      await cleanupNoteImages(id, imageUrls)
    }

    revalidatePath('/trash')
    revalidatePath('/home')
    return { success: true }
  } catch (error) {
    console.error('Error permanently deleting note:', error)
    throw new Error('Failed to permanently delete note')
  }
}

export async function emptyTrash() {
  const session = await auth()
  if (!session?.user?.id) throw new Error('Unauthorized')

  try {
    const trashedNotes = await prisma.note.findMany({
      where: { userId: session.user.id, trashedAt: { not: null } },
      select: { id: true, images: true }
    })

    await prisma.note.deleteMany({
      where: { userId: session.user.id, trashedAt: { not: null } }
    })

    for (const note of trashedNotes) {
      const imageUrls = parseImageUrls(note.images)
      if (imageUrls.length > 0) {
        await cleanupNoteImages(note.id, imageUrls)
      }
    }

    await prisma.notebook.deleteMany({
      where: { userId: session.user.id, trashedAt: { not: null } }
    })

    revalidatePath('/trash')
    revalidatePath('/home')
    return { success: true }
  } catch (error) {
    console.error('Error emptying trash:', error)
    throw new Error('Failed to empty trash')
  }
}

export async function removeImageFromNote(noteId: string, imageIndex: number) {
  const session = await auth()
  if (!session?.user?.id) throw new Error('Unauthorized')

  try {
    const note = await prisma.note.findUnique({
      where: { id: noteId, userId: session.user.id },
      select: { images: true },
    })
    if (!note) throw new Error('Note not found')

    const imageUrls = parseImageUrls(note.images)
    if (imageIndex < 0 || imageIndex >= imageUrls.length) throw new Error('Invalid image index')

    const removedUrl = imageUrls[imageIndex]
    const newImages = imageUrls.filter((_, i) => i !== imageIndex)

    await prisma.note.update({
      where: { id: noteId },
      data: { images: newImages.length > 0 ? JSON.stringify(newImages) : null },
    })

    await deleteImageFileSafely(removedUrl, noteId)

    return { success: true }
  } catch (error) {
    console.error('Error removing image:', error)
    throw new Error('Failed to remove image')
  }
}

export async function cleanupOrphanedImages(imageUrls: string[], noteId: string) {
  const session = await auth()
  if (!session?.user?.id) return

  try {
    for (const url of imageUrls) {
      await deleteImageFileSafely(url, noteId)
    }
  } catch {
    // Silent — best-effort cleanup
  }
}

export async function getTrashCount() {
  const session = await auth()
  if (!session?.user?.id) return 0

  try {
    const [noteCount, notebookCount] = await Promise.all([
      prisma.note.count({
        where: { userId: session.user.id, trashedAt: { not: null } }
      }),
      prisma.notebook.count({
        where: { userId: session.user.id, trashedAt: { not: null } }
      })
    ])
    return noteCount + notebookCount
  } catch {
    return 0
  }
}

export async function getTrashedNotebooks() {
  const session = await auth()
  if (!session?.user?.id) return []

  try {
    return await prisma.notebook.findMany({
      where: { userId: session.user.id, trashedAt: { not: null } },
      include: { _count: { select: { notes: true } } },
      orderBy: { trashedAt: 'desc' }
    })
  } catch (error) {
    console.error('Error fetching trashed notebooks:', error)
    return []
  }
}