import { parseManifestUseCases } from "./_manifest-ast.js";
import { useCaseNameFromFile } from "./_usecase-name.js";
import {
  manifestPathForFeature,
  featureRootForFile,
} from "./_manifest-source.js";

/** @type {import("eslint").Rule.RuleModule} */
export default {
  meta: {
    type: "problem",
    docs: {
      description:
        'analytics.track("X") inside a use-case factory must declare X in manifest.useCases[name].analyticsEvents.',
    },
    schema: [
      {
        type: "object",
        properties: { repoRoot: { type: "string" } },
        additionalProperties: false,
      },
    ],
    messages: {
      undeclared:
        '{{useCase}} calls analytics.track("{{event}}") but {{event}} is not declared in manifest.useCases.{{useCase}}.analyticsEvents. Add it to the manifest or remove the call.',
    },
  },
  create(context) {
    const opts = context.options[0] ?? {};
    const repoRoot = opts.repoRoot ?? context.cwd ?? process.cwd();
    const filename = context.filename;
    const useCaseName = useCaseNameFromFile(filename);
    if (!useCaseName) return {};
    const featureRoot = featureRootForFile(filename, repoRoot);
    if (!featureRoot) return {};
    const manifest = parseManifestUseCases(manifestPathForFeature(featureRoot));
    if (!manifest || !manifest[useCaseName]) return {};
    const declared = new Set(manifest[useCaseName].analyticsEvents ?? []);
    return {
      CallExpression(node) {
        if (
          node.callee.type === "MemberExpression" &&
          node.callee.object.type === "Identifier" &&
          node.callee.object.name === "analytics" &&
          node.callee.property.type === "Identifier" &&
          node.callee.property.name === "track" &&
          node.arguments.length > 0 &&
          node.arguments[0].type === "Literal" &&
          typeof node.arguments[0].value === "string"
        ) {
          const event = node.arguments[0].value;
          if (!declared.has(event)) {
            context.report({
              node,
              messageId: "undeclared",
              data: { event, useCase: useCaseName },
            });
          }
        }
      },
    };
  },
};