import { NextResponse } from 'next/server';
import { and, eq } from 'drizzle-orm';
import { z } from 'zod';

import { type RouteHandler } from '@/lib/api/helpers';
import { parseBody } from '@/lib/api/route-helpers';
import { errorResponse, NotFoundError, ValidationError } from '@/lib/errors';
import { db } from '@/lib/db';
import { interests } from '@/lib/db/schema/interests';
import { berths } from '@/lib/db/schema/berths';
import { listBerthsForInterest, upsertInterestBerth } from '@/lib/services/interest-berths.service';
import { createAuditLog } from '@/lib/audit';
import { emitToRoom } from '@/lib/socket/server';

// ─── Schemas ────────────────────────────────────────────────────────────────

const addBerthSchema = z.object({
  berthId: z.string().min(1),
  /** Drives the public-map "Under Offer" sub-status. See plan §5.4. */
  isSpecificInterest: z.boolean(),
});

// ─── GET /api/v1/interests/[id]/berths ──────────────────────────────────────
//
// Returns the linked-berths list (plan §5.5) along with the parent interest's
// `eoiStatus` so the UI can decide whether to show the EOI-bypass control.
// Tenant-scoped: 404 when the interest doesn't belong to the caller's port,
// matching the recommender route's enumeration-prevention behaviour.
export const listHandler: RouteHandler = async (_req, ctx, params) => {
  try {
    const interestId = params.id!;
    const interest = await db.query.interests.findFirst({
      where: eq(interests.id, interestId),
    });
    if (!interest || interest.portId !== ctx.portId) {
      throw new NotFoundError('Interest');
    }
    const links = await listBerthsForInterest(interestId);
    return NextResponse.json({
      data: links,
      meta: { eoiStatus: interest.eoiStatus },
    });
  } catch (error) {
    return errorResponse(error);
  }
};

// ─── POST /api/v1/interests/[id]/berths ─────────────────────────────────────
//
// Add a (non-primary) berth link to the interest. Defaults to
// `isInEoiBundle=false`, `isPrimary=false`; the rep can flip these later via
// the linked-berths list (PATCH route below).
export const addHandler: RouteHandler = async (req, ctx, params) => {
  try {
    const body = await parseBody(req, addBerthSchema);
    const interestId = params.id!;

    const interest = await db.query.interests.findFirst({
      where: eq(interests.id, interestId),
    });
    if (!interest || interest.portId !== ctx.portId) {
      throw new NotFoundError('Interest');
    }

    // Tenant scope: berth must belong to this port (never trust a client-
    // supplied id to cross port boundaries — plan §14.10).
    const berth = await db.query.berths.findFirst({
      where: and(eq(berths.id, body.berthId), eq(berths.portId, ctx.portId)),
    });
    if (!berth) {
      throw new ValidationError('berthId not found in this port');
    }

    const link = await upsertInterestBerth(interestId, body.berthId, {
      isSpecificInterest: body.isSpecificInterest,
      addedBy: ctx.userId,
    });

    void createAuditLog({
      userId: ctx.userId,
      portId: ctx.portId,
      action: 'update',
      entityType: 'interest',
      entityId: interestId,
      newValue: { berthId: body.berthId, isSpecificInterest: body.isSpecificInterest },
      metadata: { type: 'berth_added_to_interest' },
      ipAddress: ctx.ipAddress,
      userAgent: ctx.userAgent,
    });

    emitToRoom(`port:${ctx.portId}`, 'interest:berthLinked', {
      interestId,
      berthId: body.berthId,
    });
    // Outbound webhook: the legacy /link-berth path dispatched
    // `interest.berth_linked` and external integrations subscribe to it.
    // The new junction-add path must keep that contract.
    void import('@/lib/services/webhook-dispatch').then(({ dispatchWebhookEvent }) =>
      dispatchWebhookEvent(ctx.portId, 'interest:berthLinked', {
        interestId,
        berthId: body.berthId,
      }),
    );

    return NextResponse.json({ data: link }, { status: 201 });
  } catch (error) {
    return errorResponse(error);
  }
};