import { NextResponse } from "next/server"
import { eq } from "drizzle-orm"
import { db } from "@/lib/db"
import { follow_up_rules } from "@/lib/db/schema"
import { isAuthorizedCron } from "@/lib/cron-auth"
import { runFollowUpsForUser } from "@/lib/follow-ups"

// Automated follow-ups cron: runs every user's active follow-up rules.
// Runs daily at 10:00 UTC (see functions/project.yml → follow-ups trigger).
export async function GET(request: Request) {
  if (!isAuthorizedCron(request)) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
  }

  // Distinct user ids that have at least one active follow-up rule.
  const rows = await db
    .selectDistinct({ user_id: follow_up_rules.user_id })
    .from(follow_up_rules)
    .where(eq(follow_up_rules.is_active, true))

  let processed = 0
  let total = 0

  for (const { user_id } of rows) {
    try {
      const result = await runFollowUpsForUser(user_id)
      total += result.sent
      processed++
    } catch (err) {
      console.error(`follow-ups cron failed for user ${user_id}:`, err)
    }
  }

  return NextResponse.json({ processed, sent: total })
}