import { OpenApiKind } from '@useoptic/openapi-utilities';
import { Operation, RuleContext, Specification } from '../types';
import { NodeDetail } from './rule-runner-types';
import semver from 'semver';
const getSpecificationChange = (
  specificationNode: NodeDetail<OpenApiKind.Specification>
) => {
  return specificationNode.after?.value['x-optic-ci-empty-spec'] === true
    ? 'removed'
    : specificationNode.before?.value['x-optic-ci-empty-spec'] === true
      ? 'added'
      : specificationNode.change?.changeType || null;
};

export const createRuleContextWithoutOperation = (
  specification: {
    node: NodeDetail<OpenApiKind.Specification>;
  } & (
    | { before: Specification | null; after: Specification }
    | { before: Specification; after: null }
  ),
  custom: any
): RuleContext => {
  const specificationChange = getSpecificationChange(specification.node);

  const beforeVersion = specification.before?.raw.info.version || '0.0.0';
  const afterVersion = specification.after?.raw.info.version || '0.0.0';
  let versionChange;

  try {
    versionChange = semver.diff(beforeVersion, afterVersion);
  } catch (e) {
    versionChange = null;
  }

  return {
    custom,
    specification: {
      ...(specificationChange === 'removed'
        ? specification.before!
        : specification.after!),
      change: specificationChange,
      versionChange,
    },
    operation: {
      location: {
        jsonPath: '',
        conceptualLocation: { path: '', method: '' },
        conceptualPath: [],
        kind: OpenApiKind.Operation,
      },
      polymorphicSchemas: { before: new Set(), after: new Set() },
      value: { pathPattern: '', method: '' },
      path: '',
      method: '',
      raw: {
        responses: {},
      },
      security: null,
      change: null,
      queryParameters: new Map(),
      pathParameters: new Map(),
      headerParameters: new Map(),
      cookieParameters: new Map(),
      requests: [],
      responses: new Map(),
    },
  };
};

export const createRuleContextWithOperation = (
  specification: {
    node: NodeDetail<OpenApiKind.Specification>;
  } & (
    | { before: Specification | null; after: Specification }
    | { before: Specification; after: null }
  ),
  operation: {
    node: NodeDetail<OpenApiKind.Operation>;
  } & (
    | { before: Operation | null; after: Operation }
    | { before: Operation; after: null }
  ),
  custom: any
): RuleContext => {
  const specificationChange = getSpecificationChange(specification.node);

  const beforeVersion = specification.before?.raw.info.version || '0.0.0';
  const afterVersion = specification.after?.raw.info.version || '0.0.0';
  let versionChange;

  try {
    versionChange = semver.diff(beforeVersion, afterVersion);
  } catch (e) {
    versionChange = null;
  }

  if (specificationChange === 'removed') {
    return {
      custom,
      specification: {
        ...specification.before!,
        change: specificationChange,
        versionChange,
      },
      operation: {
        ...operation.before!,
        change: specificationChange,
      },
    };
  } else {
    return {
      custom,
      specification: {
        ...specification.after!,
        change: specificationChange,
        versionChange,
      },
      operation: {
        ...(operation.after ? operation.after : operation.before),
        change: operation.node.change?.changeType || null,
      },
    };
  }
};

export const isExempted = (raw: object, ruleName: string) => {
  const exemptions = raw['x-optic-exemptions'];
  return (
    exemptions === ruleName ||
    (Array.isArray(exemptions) && exemptions.includes(ruleName))
  );
};