import { cp } from "node:fs/promises";
import { exec } from "node:child_process";
import { lookpath } from "lookpath";
import path from "node:path";
import { replaceTokensInFile } from "./file-utils.js";

/**
 * Updates the package.json file
 * @param destPath - The path where the package.json file is located
 * @param packageName - The name of the package
 * @param description - The description of the package
 * @param fileName - The name of the output file
 * @param repoUrl - The repository URL
 */
export async function updatePackageFile(
  destPath: string,
  packageName: string,
  description: string,
  fileName: string,
  repoUrl: string,
): Promise<void> {
  await replaceTokensInFile({
    path: path.join(destPath, "package.json"),
    tokens: [
      {
        from: /"tsParticles empty template"/g,
        to: `"${description}"`,
      },
      {
        from: /"tsparticles.empty.template.min.js"/g,
        to: `"${fileName}"`,
      },
      {
        from: /\s{4}"private": true,\r?\n?/g,
        to: "",
      },
      {
        from: /"@tsparticles\/empty-template"/g,
        to: `"${packageName}"`,
      },
      {
        from: /"url": "git\+https:\/\/github\.com\/tsparticles\/empty-template\.git"/g,
        to: `"url": "git+${repoUrl}"`,
      },
      {
        from: /"url": "https:\/\/github\.com\/tsparticles\/empty-template\/issues"/g,
        to: `"url": "${repoUrl.replace(".git", "/issues")}"`,
      },
    ],
  });
}

/**
 * Updates the package.dist.json file with the new project name and description
 * @param destPath - The path where the package.dist.json file is located
 * @param packageName - The name of the package
 * @param description - The description of the package
 * @param fileName - The name of the output file
 * @param repoUrl - The url of the repository
 */
export async function updatePackageDistFile(
  destPath: string,
  packageName: string,
  description: string,
  fileName: string,
  repoUrl: string,
): Promise<void> {
  await replaceTokensInFile({
    path: path.join(destPath, "package.dist.json"),
    tokens: [
      {
        from: /"tsParticles empty template"/g,
        to: `"${description}"`,
      },
      {
        from: /"tsparticles.empty.template.min.js"/g,
        to: `"${fileName}"`,
      },
      {
        from: /\s{4}"private": true,\r?\n?/g,
        to: "",
      },
      {
        from: /"@tsparticles\/empty-template"/g,
        to: `"${packageName}"`,
      },
      {
        from: /"url": "git\+https:\/\/github\.com\/tsparticles\/empty-template\.git"/g,
        to: `"url": "git+${repoUrl}"`,
      },
      {
        from: /"url": "https:\/\/github\.com\/tsparticles\/empty-template\/issues"/g,
        to: `"url": "${repoUrl.replace(".git", "/issues")}"`,
      },
    ],
  });
}

/**
 * Updates the webpack file with the new project name and description
 * @param destPath - The path where the project will be created
 * @param name - The name of the project
 * @param description - The description of the project
 * @param fnName - The name of the function to load the template
 */
export async function updateWebpackFile(
  destPath: string,
  name: string,
  description: string,
  fnName: string,
): Promise<void> {
  await replaceTokensInFile({
    path: path.join(destPath, "webpack.config.js"),
    tokens: [
      {
        from: /"Empty"/g,
        to: `"${description}"`,
      },
      {
        from: /"empty"/g,
        to: `"${name}"`,
      },
      {
        from: /loadParticlesTemplate/g,
        to: fnName,
      },
    ],
  });
}

/**
 * Copies the empty template files to the destination path
 * @param destPath - The path where the project will be created
 */
export async function copyEmptyTemplateFiles(destPath: string): Promise<void> {
  await cp(path.join(__dirname, "..", "..", "files", "empty-project"), destPath, {
    recursive: true,
    force: true,
    filter: copyFilter,
  });
}

/**
 * Filters the files to copy
 * @param src - The source file path
 * @returns true if the file should be copied
 */
export function copyFilter(src: string): boolean {
  return !(src.endsWith("node_modules") || src.endsWith("dist"));
}

/**
 * Runs npm install in the given path
 * @param destPath - The path where the project will be created
 */
export async function runInstall(destPath: string): Promise<void> {
  if (!(await lookpath("npm"))) {
    return;
  }

  return new Promise((resolve, reject) => {
    exec(
      "npm install",
      {
        cwd: destPath,
      },
      error => {
        if (error) {
          reject(error);

          return;
        }

        resolve();
      },
    );
  });
}

/**
 * Runs npm run build in the given path
 * @param destPath - The path where the project will be build
 */
export async function runBuild(destPath: string): Promise<void> {
  if (!(await lookpath("npm"))) {
    return;
  }

  return new Promise((resolve, reject) => {
    exec(
      "npm run build",
      {
        cwd: destPath,
      },
      error => {
        if (error) {
          reject(error);

          return;
        }

        resolve();
      },
    );
  });
}