/*
 * Copyright 2023 Harness, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

const fs = require('fs')
const path = require('path')
const _ = require('lodash')
const yaml = require('js-yaml')
const stringify = require('fast-json-stable-stringify')

module.exports = inputSchema => {
  const config = 'code'
  const overridesFile = path.join('src/services', config, 'overrides.yaml')

  let paths = inputSchema.paths

  if (fs.existsSync(overridesFile)) {
    const data = fs.readFileSync(overridesFile, 'utf8')
    const { allowpaths, operationIdOverrides } = yaml.safeLoad(data)

    if (!allowpaths.includes('*')) {
      paths = _.pick(paths, ...allowpaths)
    }

    _.forIn(operationIdOverrides, (value, key) => {
      const [path, method] = key.split('.')

      if (path && method && _.has(paths, path) && _.has(paths[path], method)) {
        _.set(paths, [path, method, 'operationId'], value)
      }
    })
  }

  inputSchema.paths = paths

  const transformFile = path.join('src/services', config, 'transform.js')

  if (fs.existsSync(transformFile)) {
    const transform = require(path.resolve(process.cwd(), transformFile))

    inputSchema = transform(inputSchema)
  } else {
    console.error('Transform file not found for the specified config.')
    process.exit(1)
  }

  // stringify and parse JSON to get a stable object
  return JSON.parse(stringify(inputSchema))
}