import { NextResponse } from "next/server";
import { getCurrentUser } from "@/lib/auth";
import { prisma } from "@/lib/prisma";
import { getJourneySummary, buildJourneys } from "@/lib/services/journeys";
import { DateRange } from "@/lib/services/date-utils";

/**
 * GET /api/journeys?brandId=xxx&range=30d
 * Returns journey summary with funnel metrics, channel breakdown,
 * top pages, and recent journey details.
 */
export const dynamic = "force-dynamic";

export async function GET(req: Request) {
  const user = await getCurrentUser();
  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });

  const { searchParams } = new URL(req.url);
  const brandId = searchParams.get("brandId");
  if (!brandId) return NextResponse.json({ error: "brandId required" }, { status: 400 });

  const brand = await prisma.brand.findUnique({
    where: { id: brandId },
    include: { organization: { include: { memberships: true } } },
  });
  if (!brand || !brand.organization.memberships.some((m) => m.userId === user.id)) {
    return NextResponse.json({ error: "Access denied" }, { status: 403 });
  }

  const range = (searchParams.get("range") || "30d") as DateRange;
  const summary = await getJourneySummary(brandId, range);
  return NextResponse.json(summary);
}

/**
 * POST /api/journeys — build journeys from existing conversion + CRM data
 * Body: { brandId }
 */
export async function POST(req: Request) {
  const user = await getCurrentUser();
  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 });

  try {
    const { brandId } = await req.json();
    if (!brandId) return NextResponse.json({ error: "brandId required" }, { status: 400 });

    const result = await buildJourneys(brandId);
    return NextResponse.json(result);
  } catch {
    return NextResponse.json({ error: "Something went wrong" }, { status: 500 });
  }
}
