/**
 * Route handlers for `/api/v1/berths/[id]/pdf-versions` (Phase 6b).
 *
 * Lives in handlers.ts (not route.ts) so integration tests can call them
 * directly, bypassing the auth/permission middleware (per CLAUDE.md
 * "Route handler exports" convention).
 */

import { NextResponse } from 'next/server';

import { type RouteHandler } from '@/lib/api/helpers';
import { errorResponse, ValidationError } from '@/lib/errors';
import { listBerthPdfVersions, uploadBerthPdf } from '@/lib/services/berth-pdf.service';

interface PostBody {
  storageKey: string;
  fileName: string;
  fileSizeBytes: number;
  sha256: string;
  parseResults?: {
    engine: 'acroform' | 'ocr' | 'ai';
    extracted?: Record<string, unknown>;
    meanConfidence?: number;
    warnings?: string[];
  };
}

export const getHandler: RouteHandler = async (_req, _ctx, params) => {
  try {
    const versions = await listBerthPdfVersions(params.id!);
    return NextResponse.json({ data: versions });
  } catch (error) {
    return errorResponse(error);
  }
};

export const postHandler: RouteHandler = async (req, ctx, params) => {
  try {
    const body = (await req.json()) as Partial<PostBody>;
    if (!body.storageKey || !body.fileName) {
      throw new ValidationError('storageKey and fileName are required');
    }
    if (typeof body.fileSizeBytes !== 'number' || body.fileSizeBytes <= 0) {
      throw new ValidationError('fileSizeBytes must be a positive integer');
    }
    if (!body.sha256 || typeof body.sha256 !== 'string') {
      throw new ValidationError('sha256 is required');
    }
    const result = await uploadBerthPdf({
      berthId: params.id!,
      storageKey: body.storageKey,
      fileName: body.fileName,
      fileSizeBytes: body.fileSizeBytes,
      sha256: body.sha256,
      uploadedBy: ctx.userId,
      parseResult: body.parseResults
        ? {
            engine: body.parseResults.engine,
            // Reconstruct just enough of the ParseResult shape to round-trip
            // through serialization; the rep already saw the conflicts in the
            // diff dialog, so storing the engine + extracted is what we need
            // for audit.
            fields: Object.fromEntries(
              Object.entries(body.parseResults.extracted ?? {}).map(([k, v]) => {
                if (v && typeof v === 'object' && 'value' in v) {
                  const obj = v as { value: unknown; confidence?: number };
                  return [
                    k,
                    {
                      value: obj.value as never,
                      confidence: typeof obj.confidence === 'number' ? obj.confidence : 1,
                      engine: body.parseResults!.engine,
                    },
                  ];
                }
                return [k, undefined];
              }),
            ) as never,
            meanConfidence: body.parseResults.meanConfidence ?? 1,
            warnings: body.parseResults.warnings ?? [],
          }
        : undefined,
    });
    return NextResponse.json({ data: result }, { status: 201 });
  } catch (error) {
    return errorResponse(error);
  }
};