import { resolve, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import { VITE_USER_DEFINED_ENVIRONMENT_KEYS } from './src/infrastructure/EnvironmentVariables/Vite/ViteEnvironmentKeys';
import tsconfigJson from './tsconfig.json' assert { type: 'json' };
import packageJson from './package.json' assert { type: 'json' };

type ViteAliasDefinitions = Record<string, string>;

export function getAliases(): ViteAliasDefinitions {
  return {
    ...getPathAliasesFromTsConfig(),
    ...getElectronProcessSpecificModuleAliases(),
  };
}

export function getSelfDirectoryAbsolutePath() {
  const filePath = fileURLToPath(import.meta.url);
  const directoryPath = dirname(filePath);
  return directoryPath;
}

type ViteEnvironmentKeyValues = {
  [K in
    typeof VITE_USER_DEFINED_ENVIRONMENT_KEYS[keyof typeof VITE_USER_DEFINED_ENVIRONMENT_KEYS]
  ]: string
};

type ViteGlobalVariableReplacementDefinitions = Record<string, string>;

export function getClientEnvironmentVariables(): ViteGlobalVariableReplacementDefinitions {
  const environmentVariables: ViteEnvironmentKeyValues = {
    [VITE_USER_DEFINED_ENVIRONMENT_KEYS.NAME]: packageJson.name,
    [VITE_USER_DEFINED_ENVIRONMENT_KEYS.VERSION]: packageJson.version,
    [VITE_USER_DEFINED_ENVIRONMENT_KEYS.REPOSITORY_URL]: packageJson.repository.url,
    [VITE_USER_DEFINED_ENVIRONMENT_KEYS.HOMEPAGE_URL]: packageJson.homepage,
    [VITE_USER_DEFINED_ENVIRONMENT_KEYS.SLOGAN]: packageJson.slogan,
  };
  return Object.entries(environmentVariables).reduce((acc, [key, value]) => {
    const formattedEnvVariableKey = `import.meta.env.${key}`;
    const jsonEncodedEnvVariableValue = JSON.stringify(value);
    return { ...acc, [formattedEnvVariableKey]: jsonEncodedEnvVariableValue };
  }, {});
}

function getPathAliasesFromTsConfig(): ViteAliasDefinitions {
  const { paths } = tsconfigJson.compilerOptions;
  return Object.keys(paths).reduce((aliases, pathName) => {
    const pathFolder = paths[pathName][0];
    const aliasFolder = pathFolder.substring(0, pathFolder.length - 1); // trim * from end
    const aliasName = pathName.substring(0, pathName.length - 2); // trim /* from end
    const aliasPath = resolve(getSelfDirectoryAbsolutePath(), aliasFolder);
    aliases[aliasName] = aliasPath;
    return aliases;
  }, {});
}

function getElectronProcessSpecificModuleAliases(): ViteAliasDefinitions {
  // Workaround for scoped Electron module imports due to https://github.com/alex8088/electron-vite/issues/372
  const electronProcessScopedModuleAliases = [
    'electron/main',
    'electron/renderer',
    'electron/common',
  ] as const;
  return electronProcessScopedModuleAliases.reduce((aliases, alias) => {
    aliases[alias] = 'electron';
    return aliases;
  }, {});
}