/**
 * Feature test files import from `src/` through the `@/` alias, never via
 * `../` parent traversal (CLAUDE.md "Key Conventions"). A `../` import in a
 * test file is always reaching across `src/` directories — `@/` keeps those
 * imports stable under file moves and makes the test's dependencies legible.
 *
 * Scoped to feature packages (`packages/<name>/src/`, excluding `core-*`):
 * the convention is part of the feature template's contract. Core packages
 * are generated and governed by their own templates, and tooling packages
 * (turbo/generators, scripts) legitimately use relative paths.
 */
function isFeatureSrcTestFile(filename) {
  const normalized = filename.replace(/\\/g, "/");
  if (!normalized.endsWith(".test.ts") && !normalized.endsWith(".test.tsx")) {
    return false;
  }
  return /\/packages\/(?!core-)[^/]+\/src\//.test(normalized);
}

/** @type {import("eslint").Rule.RuleModule} */
export default {
  meta: {
    type: "problem",
    docs: {
      description:
        "Feature test files must import src modules via the @/ alias, not ../ parent paths.",
    },
    schema: [],
    messages: {
      relativeParentImport:
        'Test file imports "{{source}}" with a ../ parent path. Use the "@/" alias for src imports (e.g. "@/application/...").',
    },
  },
  create(context) {
    if (!isFeatureSrcTestFile(context.filename)) return {};
    return {
      ImportDeclaration(node) {
        const source = node.source.value;
        if (typeof source === "string" && source.startsWith("../")) {
          context.report({
            node: node.source,
            messageId: "relativeParentImport",
            data: { source },
          });
        }
      },
    };
  },
};