import { NextRequest, NextResponse } from 'next/server'
import prisma from '@/lib/prisma'
import { getMobileUserId } from '@/lib/mobile-auth'

export async function GET(
  req: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  const userId = getMobileUserId(req)
  if (!userId) return NextResponse.json({ error: 'Non autorisé' }, { status: 401 })

  const { id } = await params

  const note = await prisma.note.findFirst({
    where: { id, userId, trashedAt: null },
    select: {
      id: true,
      title: true,
      content: true,
      updatedAt: true,
      createdAt: true,
      color: true,
      notebook: { select: { id: true, name: true } },
    },
  })

  if (!note) return NextResponse.json({ error: 'Note introuvable' }, { status: 404 })

  return NextResponse.json({ note })
}

export async function PUT(
  req: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  const userId = getMobileUserId(req)
  if (!userId) return NextResponse.json({ error: 'Non autorisé' }, { status: 401 })

  const { id } = await params
  const { title, content } = await req.json().catch(() => ({}))

  const existing = await prisma.note.findFirst({ where: { id, userId, trashedAt: null } })
  if (!existing) return NextResponse.json({ error: 'Note introuvable' }, { status: 404 })

  const htmlContent = content !== undefined ? buildHtmlContent(content) : existing.content

  const note = await prisma.note.update({
    where: { id },
    data: {
      ...(title?.trim() ? { title: title.trim() } : {}),
      content: htmlContent,
      updatedAt: new Date(),
    },
    select: { id: true, title: true, updatedAt: true },
  })

  return NextResponse.json({ note })
}

export async function DELETE(
  req: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  const userId = getMobileUserId(req)
  if (!userId) return NextResponse.json({ error: 'Non autorisé' }, { status: 401 })

  const { id } = await params
  const note = await prisma.note.findFirst({ where: { id, userId, trashedAt: null } })
  if (!note) return NextResponse.json({ error: 'Note introuvable' }, { status: 404 })

  await prisma.note.update({ where: { id }, data: { trashedAt: new Date() } })
  return NextResponse.json({ ok: true })
}

function buildHtmlContent(text: string): string {
  if (!text.trim()) return '<p></p>'
  if (text.trimStart().startsWith('<')) return text
  return text
    .split('\n')
    .map((line) => `<p>${line.trim() ? escapeHtml(line) : ''}</p>`)
    .join('')
}

function escapeHtml(s: string) {
  return s.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;')
}