import {convertWorkflowTemplate, parseWorkflow, TemplateParseResult, WorkflowTemplate} from "@actions/workflow-parser";
import {parseAction} from "@actions/workflow-parser/actions/action-parser";
import {
  ActionTemplate,
  ActionTemplateConverterOptions,
  convertActionTemplate
} from "@actions/workflow-parser/actions/action-template";
import {WorkflowTemplateConverterOptions} from "@actions/workflow-parser/model/convert";
import {TemplateContext} from "@actions/workflow-parser/templates/template-context";
import {TemplateToken} from "@actions/workflow-parser/templates/tokens/template-token";
import {File} from "@actions/workflow-parser/workflows/file";

import {CompletionConfig} from "../complete.js";
import {nullTrace} from "../nulltrace.js";

const parsedWorkflowCache = new Map<string, TemplateParseResult>();
const parsedActionCache = new Map<string, TemplateParseResult>();
const workflowTemplateCache = new Map<string, WorkflowTemplate>();
const actionTemplateCache = new Map<string, ActionTemplate>();

export function clearCacheEntry(uri: string) {
  parsedWorkflowCache.delete(uri);
  parsedWorkflowCache.delete(cacheKey(uri, true));
  parsedActionCache.delete(uri);
  parsedActionCache.delete(cacheKey(uri, true));
  workflowTemplateCache.delete(uri);
  workflowTemplateCache.delete(cacheKey(uri, true));
  actionTemplateCache.delete(uri);
  actionTemplateCache.delete(cacheKey(uri, true));
}

export function clearCache() {
  parsedWorkflowCache.clear();
  parsedActionCache.clear();
  workflowTemplateCache.clear();
  actionTemplateCache.clear();
}

/**
 * Parses a workflow file, returning cached result if available
 * @param transformed Indicates whether the workflow has been transformed before parsing
 * @returns the {@link TemplateParseResult}
 */
export function getOrParseWorkflow(file: File, uri: string, transformed = false): TemplateParseResult {
  const key = cacheKey(uri, transformed);
  const cachedResult = parsedWorkflowCache.get(key);
  if (cachedResult) {
    return cachedResult;
  }
  const result = parseWorkflow(file, nullTrace);
  parsedWorkflowCache.set(key, result);
  return result;
}

/**
 * Parses an action file, returning cached result if available
 * @param transformed Indicates whether the action has been transformed before parsing
 * @returns the {@link TemplateParseResult}
 */
export function getOrParseAction(file: File, uri: string, transformed = false): TemplateParseResult {
  const key = cacheKey(uri, transformed);
  const cachedResult = parsedActionCache.get(key);
  if (cachedResult) {
    return cachedResult;
  }
  const result = parseAction(file, nullTrace);
  parsedActionCache.set(key, result);
  return result;
}

/**
 * Converts a workflow template, returning cached result if available
 * @param transformed Indicates whether the workflow has been transformed before parsing
 * @returns the converted {@link WorkflowTemplate}
 */
export async function getOrConvertWorkflowTemplate(
  context: TemplateContext,
  template: TemplateToken,
  uri: string,
  config?: CompletionConfig,
  options?: WorkflowTemplateConverterOptions,
  transformed = false
): Promise<WorkflowTemplate> {
  const key = cacheKey(uri, transformed);
  const cachedTemplate = workflowTemplateCache.get(key);
  if (cachedTemplate) {
    return cachedTemplate;
  }
  const workflowTemplate = await convertWorkflowTemplate(context, template, config?.fileProvider, options);
  workflowTemplateCache.set(key, workflowTemplate);
  return workflowTemplate;
}

/**
 * Converts an action template, returning cached result if available
 * @param transformed Indicates whether the action has been transformed before parsing
 * @returns the converted {@link ActionTemplate}
 */
export function getOrConvertActionTemplate(
  context: TemplateContext,
  template: TemplateToken,
  uri: string,
  options?: ActionTemplateConverterOptions,
  transformed = false
): ActionTemplate {
  const key = cacheKey(uri, transformed);
  const cachedTemplate = actionTemplateCache.get(key);
  if (cachedTemplate) {
    return cachedTemplate;
  }
  const actionTemplate = convertActionTemplate(context, template, options);
  actionTemplateCache.set(key, actionTemplate);
  return actionTemplate;
}

// Use a separate cache key for transformed documents
function cacheKey(uri: string, transformed: boolean): string {
  if (transformed) {
    return `transformed-${uri}`;
  }
  return uri;
}