import * as io from "@actions/io";
import { DeploymentConfig } from "../types/deploymentConfig";
import * as core from "@actions/core";
import { DockerExec } from "../types/docker";
import { getNormalizedPath } from "./githubUtils";

export async function getDeploymentConfig(): Promise<DeploymentConfig> {
  let helmChartPaths: string[] =
    process.env?.HELM_CHART_PATHS?.split(";").filter((path) => path != "") ||
    [];
  helmChartPaths = helmChartPaths.map((helmchart) =>
    getNormalizedPath(helmchart.trim())
  );

  let inputManifestFiles: string[] =
    core
      .getInput("manifests")
      .split(/[\n,;]+/)
      .filter((manifest) => manifest.trim().length > 0) || [];
  if (helmChartPaths?.length == 0) {
    inputManifestFiles = inputManifestFiles.map((manifestFile) =>
      getNormalizedPath(manifestFile)
    );
  }

  const imageNames = core.getInput("images").split("\n") || [];
  const imageDockerfilePathMap: { [id: string]: string } = {};

  const pullImages = !(core.getInput("pull-images").toLowerCase() === "false");
  if (pullImages) {
    //Fetching from image label if available
    for (const image of imageNames) {
      try {
        imageDockerfilePathMap[image] = await getDockerfilePath(image);
      } catch (ex) {
        core.warning(
            `Failed to get dockerfile path for image ${image.toString()}: ${ex} `
        );
      }
    }
  }

  return Promise.resolve(<DeploymentConfig>{
    manifestFilePaths: inputManifestFiles,
    helmChartFilePaths: helmChartPaths,
    dockerfilePaths: imageDockerfilePathMap,
  });
}

async function getDockerfilePath(image: any): Promise<string> {
  await checkDockerPath();
  const dockerExec: DockerExec = new DockerExec("docker");
  await dockerExec.pull(image, [], false);

  const imageInspectResult: string = await dockerExec.inspect(image, [], false);
  const imageConfig = JSON.parse(imageInspectResult)[0];
  const DOCKERFILE_PATH_LABEL_KEY = "dockerfile-path";

  let pathValue: string = "";
  if (
    imageConfig?.Config?.Labels &&
    imageConfig?.Config?.Labels[DOCKERFILE_PATH_LABEL_KEY]
  ) {
    const pathLabel = imageConfig.Config.Labels[DOCKERFILE_PATH_LABEL_KEY];
    pathValue = getNormalizedPath(pathLabel);
  }
  return Promise.resolve(pathValue);
}

export async function checkDockerPath() {
  const dockerPath = await io.which("docker", false);
  if (!dockerPath) {
    throw new Error("Docker is not installed.");
  }
}