import semver from "semver";
import { ERP_KIT_PACKAGE_NAME } from "../../../../util";
import {
  isNonSemverSpecifier,
  passthroughResolver,
  readDeclaredVersion,
  type SpecifierResolver,
  type VersionFinding,
  type WorkspacePackage,
} from "./shared";

export function checkErpKitVersion(
  packages: WorkspacePackage[],
  installedVersion: string,
  resolve: SpecifierResolver = passthroughResolver,
): VersionFinding[] {
  const findings: VersionFinding[] = [];
  for (const pkg of packages) {
    const raw = readDeclaredVersion(pkg.manifest, ERP_KIT_PACKAGE_NAME);
    if (raw === undefined) continue;
    if (raw.startsWith("workspace:")) {
      findings.push({
        severity: "info",
        check: "erp-kit-version",
        subject: pkg.relativePath,
        message: `${ERP_KIT_PACKAGE_NAME}@${raw} uses the workspace protocol (expected only in the erp-kit dev repo).`,
      });
      continue;
    }
    const { spec, display, unresolvedCatalog } = resolve(raw, ERP_KIT_PACKAGE_NAME);
    if (unresolvedCatalog) {
      findings.push({
        severity: "warning",
        check: "erp-kit-version",
        subject: pkg.relativePath,
        message: `${ERP_KIT_PACKAGE_NAME}@${raw} references a pnpm catalog entry that couldn't be resolved; ensure dependencies are installed and the catalog pins it to the installed version (${installedVersion}).`,
      });
      continue;
    }
    if (isNonSemverSpecifier(spec)) {
      findings.push({
        severity: "warning",
        check: "erp-kit-version",
        subject: pkg.relativePath,
        message: `${ERP_KIT_PACKAGE_NAME}@${display} uses a non-semver specifier; cannot compare against installed ${installedVersion}. Pin it to the exact installed version.`,
      });
      continue;
    }
    if (!semver.valid(spec)) {
      findings.push({
        severity: "error",
        check: "erp-kit-version",
        subject: pkg.relativePath,
        message: `${ERP_KIT_PACKAGE_NAME}@${display} must be pinned to the exact installed version (${installedVersion}).`,
      });
      continue;
    }
    if (spec !== installedVersion) {
      findings.push({
        severity: "error",
        check: "erp-kit-version",
        subject: pkg.relativePath,
        message: `${ERP_KIT_PACKAGE_NAME}@${display} differs from the installed version ${installedVersion}; pin it to match.`,
      });
    }
  }
  return findings;
}