import { NextRequest, NextResponse } from 'next/server'
import pool from '@/lib/db'
import { getSessionFromCookie } from '@/lib/auth'

export async function GET() {
  const session = await getSessionFromCookie()
  if (!session) {
    return NextResponse.json({ error: 'Not authenticated' }, { status: 401 })
  }

  const { rows } = await pool.query(
    `SELECT id, scenario_id, assumptions, label, is_latest, created_at
     FROM pitch_investor_snapshots
     WHERE investor_id = $1 AND is_latest = true
     ORDER BY created_at DESC`,
    [session.sub]
  )

  return NextResponse.json({ snapshots: rows })
}

export async function POST(request: NextRequest) {
  const session = await getSessionFromCookie()
  if (!session) {
    return NextResponse.json({ error: 'Not authenticated' }, { status: 401 })
  }

  const body = await request.json()
  const { scenario_id, assumptions, label } = body

  if (!scenario_id || !assumptions) {
    return NextResponse.json({ error: 'scenario_id and assumptions required' }, { status: 400 })
  }

  // Mark previous latest as not latest
  await pool.query(
    `UPDATE pitch_investor_snapshots SET is_latest = false
     WHERE investor_id = $1 AND scenario_id = $2 AND is_latest = true`,
    [session.sub, scenario_id]
  )

  // Insert new snapshot
  const { rows } = await pool.query(
    `INSERT INTO pitch_investor_snapshots (investor_id, scenario_id, assumptions, label, is_latest)
     VALUES ($1, $2, $3, $4, true)
     RETURNING id, created_at`,
    [session.sub, scenario_id, JSON.stringify(assumptions), label || null]
  )

  return NextResponse.json({ snapshot: rows[0] })
}

export async function DELETE(request: NextRequest) {
  const session = await getSessionFromCookie()
  if (!session) {
    return NextResponse.json({ error: 'Not authenticated' }, { status: 401 })
  }

  const { searchParams } = new URL(request.url)
  const id = searchParams.get('id')

  if (!id) {
    return NextResponse.json({ error: 'Snapshot id required' }, { status: 400 })
  }

  await pool.query(
    `DELETE FROM pitch_investor_snapshots WHERE id = $1 AND investor_id = $2`,
    [id, session.sub]
  )

  return NextResponse.json({ success: true })
}