import { type NextRequest } from "next/server";
import { prisma } from "@/lib/prisma";
import { ok, errorResponse, requireRole, parseJson, ApiError } from "@/lib/api";
import { CloseOperationSchema } from "@/lib/schemas";
import { audit } from "@/lib/audit";
import { clientIp } from "@/lib/request";

/**
 * Complete an operation. Only the current claim holder may close, and if
 * the operation is flagged qcRequired the payload must include an inline
 * QC block (pass/fail + optional measurements). Close does four things
 * atomically:
 *
 *   1. marks the operation completed + records completedAt,
 *   2. closes the open TimeLog with unitsProcessed / note if provided,
 *   3. writes a QCRecord if this op requires QC (or if the operator passed
 *      one in voluntarily),
 *   4. audits the close for later reporting.
 */
export async function POST(req: NextRequest, ctx: { params: Promise<{ id: string }> }) {
  try {
    const actor = await requireRole("operator");
    const { id } = await ctx.params;
    const body = await parseJson(req, CloseOperationSchema);

    const existing = await prisma.operation.findUnique({
      where: { id },
      select: { id: true, status: true, claimedByUserId: true, qcRequired: true },
    });
    if (!existing) throw new ApiError(404, "not_found", "Operation not found");
    if (existing.claimedByUserId !== actor.id) {
      throw new ApiError(409, "not_claim_holder", "Only the current operator can complete this step");
    }
    if (existing.status !== "in_progress") {
      throw new ApiError(409, "op_not_active", "Step is not active");
    }
    if (existing.qcRequired && !body.qc) {
      throw new ApiError(400, "qc_required", "This step requires an inline QC check before completing");
    }

    const now = new Date();
    await prisma.$transaction(async (tx) => {
      const openLog = await tx.timeLog.findFirst({
        where: { operationId: id, operatorId: actor.id, endedAt: null },
        orderBy: { startedAt: "desc" },
      });
      if (openLog) {
        await tx.timeLog.update({
          where: { id: openLog.id },
          data: {
            endedAt: now,
            unitsProcessed: body.unitsProcessed ?? null,
            note: body.note ?? null,
          },
        });
      }
      if (body.qc) {
        await tx.qCRecord.create({
          data: {
            operationId: id,
            operatorId: actor.id,
            kind: "inline",
            passed: body.qc.passed,
            measurements: body.qc.measurements ?? null,
            notes: body.qc.notes ?? null,
          },
        });
      }
      await tx.operation.update({
        where: { id },
        data: {
          status: "completed",
          completedAt: now,
          claimedByUserId: null,
          claimedAt: null,
        },
      });
    });

    const op = await prisma.operation.findUnique({ where: { id } });
    await audit({
      actorId: actor.id,
      action: "close_op",
      entity: "Operation",
      entityId: id,
      after: {
        status: "completed",
        unitsProcessed: body.unitsProcessed ?? null,
        qcPassed: body.qc?.passed ?? null,
      },
      ipAddress: clientIp(req),
    });

    return ok({ operation: op });
  } catch (err) {
    return errorResponse(err);
  }
}