/**
 * generates the output-files from the
 * compiled data
 */

import * as fs from 'fs';
import * as util from 'util';
import * as path from 'path';

const readFile = util.promisify(fs.readFile);

import {
    SolcCompiledFile
} from '../compiled.d';

import {
    SourceCode
} from '../read-code';
import {
    Options
} from '../options';

import paths from '../paths';

let javascriptTemplatePromise: any = null;
export async function createJavascriptFile(
    source: SourceCode,
    compiled: SolcCompiledFile
): Promise<string> {
    if (!javascriptTemplatePromise) {
        javascriptTemplatePromise = readFile(
            path.join(paths.base, './src/output-files/javascript.template.js'),
            'utf-8'
        );
    }

    let template = await javascriptTemplatePromise;
    template = template.replace('<!-- sourceHash -->', source.codeHash);
    template = template.replace('<!-- compiledObject -->', JSON.stringify(compiled, null, 2));

    return template;
}

export async function createTypescriptFile(
    source: SourceCode,
    compiled: SolcCompiledFile
): Promise<string> {
    const template =
        `/* tslint:disable */
/**
 * generated via solidity-cli
 * @link https://www.npmjs.com/package/solidity-cli
 * do not edit this file manually
 * source-code-hash: ${source.codeHash}
 */
import {
    SolcCompiledContract,
    SolcCompiledFile
} from 'solidity-cli';

declare type CompiledType = {
    ${Object.keys(compiled).map(k => `'${k}': SolcCompiledContract;`)}
};
const compiled: CompiledType = ${JSON.stringify(compiled, null, 2)};
export default compiled;
`;

    return template;
}

/**
 * determines where the output should be written
 */
export function outputPath(options: Options, source: SourceCode): string {
    const DEBUG = false;
    if (DEBUG) console.log('sourceFolder: ' + options.sourceFolder);

    let globBase = options.sourceFolder.replace(/\*.*/, '');
    if (globBase.endsWith('.sol')) // single file
        globBase = path.join(globBase, '../');

    if (DEBUG) console.log('globBase: ' + globBase);

    const optDestination = options.destinationFolder ? options.destinationFolder : globBase;
    if (DEBUG) console.log('optDestination: ' + optDestination);
    let destinationFolder = path.join(globBase, optDestination);
    if (optDestination === globBase) destinationFolder = globBase;
    if (DEBUG) console.log('destinationFolder: ' + destinationFolder);

    // destination-folder is absolut
    if (options.destinationFolder && options.destinationFolder.startsWith('/'))
        destinationFolder = path.join(options.destinationFolder, './');

    const fileNameRelative = source.filename.replace(globBase, '');
    if (DEBUG) console.log('fileNameRelative: ' + fileNameRelative);

    const goalPath = path.join(
        destinationFolder,
        fileNameRelative
    );

    return goalPath;
}