// Copyright (c) 2018 Dominic Masters
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

const
  path = require('path'),
  fs = require('fs')
;

const API_BASE = '/api';

class API {
  constructor(server) {
    this.server = server;
    this.handlers = [];
  }

  getHandlers() {return this.handlers;}
  getServer() {return this.server;}
  getApp() {return this.server.getApp();}
  getExpress() {return this.getServer().getExpress();}
  getConfig() {return this.getApp().getConfig();}

  addHandler(handler) {this.handlers.push(handler);}

  registerHandlers() {
    for(let i = 0; i < this.handlers.length; i++) {
      let handler = this.handlers[i];

      //Now we  need to register each of the paths to each of the methods!
      for(let x = 0; x < handler.getMethods().length; x++) {
        let method = handler.getMethods()[x].toLowerCase();
        //For each method, there's perhaps multiple paths (e.g. post /test, get /test, post /ayy, get /ayy)
        for(let y = 0; y < handler.getPaths().length; y++) {
          let path = handler.getPaths()[y];
          let url = API_BASE;
          if(!path.startsWith('/')) url += '/';
          url += path;

          this.getExpress()[method](url, handler.onMethod.bind(handler));
          console.log('Registering ' + url + '...');
        }
      }
    }
  }

  loadHandlers() {
    let dir = path.join(__dirname, 'methods');
    this.loadHandlersInDirectory(dir);
    this.registerHandlers();
  }

  loadHandlersInDirectory(dir) {
    let assets = fs.readdirSync(dir);
    for(let i = 0; i < assets.length; i++) {
      let asset = assets[i];
      let assetPath = path.join(dir, asset);
      let stats = fs.statSync(assetPath);
      if(stats.isDirectory()) {
        this.loadHandlersInDirectory(assetPath  );
        continue;
      }

      let method = require(assetPath);
      let instance = new method(this);

      this.addHandler(instance);
    }
  }
}

module.exports = API;