"use strict";

const fs = require("fs");
const path = require("path");

function checkOutput({ areaId, outDir }) {
  if (typeof areaId !== "string" || !areaId) throw new Error("RoadCompilerCheckInput.areaId must be a non-empty string");
  if (typeof outDir !== "string" || !outDir) throw new Error("RoadCompilerCheckInput.outDir must be a non-empty string");
  const compiledPath = path.join(outDir, "compiled.json");
  if (!fs.existsSync(compiledPath)) throw new Error(`Native road output is missing: ${compiledPath}`);
  const compiled = readJson(compiledPath);
  const connectors = readJson(path.join(outDir, "layers", "connectors.geojson"));
  const published = new Set(connectors.features.map((feature) => feature.properties.movement_id));
  const failures = [];
  for (const movement of compiled.movements || []) {
    if (movement.geometryPublished && !published.has(movement.id)) failures.push(`Published movement has no connector: ${movement.id}`);
    if (!movement.geometryPublished && published.has(movement.id)) failures.push(`Non-published movement has a connector: ${movement.id}`);
    if (!movement.geometryStatus) failures.push(`Movement has no geometry status: ${movement.id}`);
  }
  const errors = (compiled.diagnostics || []).filter((item) => item.severity === "error");
  const warnings = (compiled.diagnostics || []).filter((item) => item.severity === "warning");
  return { schema: "native-road-check/v1", areaId, ok: failures.length === 0 && errors.length === 0, movementCount: (compiled.movements || []).length, connectorCount: connectors.features.length, errors: errors.map((item) => ({ id: item.id, rule: item.rule, message: item.message })), warningCount: warnings.length, failures };
}

function readJson(file) { return JSON.parse(fs.readFileSync(file, "utf8")); }

module.exports = { checkOutput };