import {Arguments} from 'yargs';
import {default as ExtLB} from '..'
import * as Inquirer from 'inquirer'
import {Answers} from "inquirer";
import * as path from 'path';
import * as _ from 'lodash';
import * as Joi from 'joi';
import * as pluralize from 'pluralize';
import * as shelljs from 'shelljs';

class Model {
  options: {
    name: string;
    camelName: string;
    snakeName: string;
    capitalName: string;
    dataSource: string;
    baseClass: string;
    public: boolean;
    pluralName: string;
    type: string;
  };
  constructor() {
    this.options = {
      name: null,
      camelName: null,
      snakeName: null,
      capitalName: null,
      dataSource: null,
      baseClass: null,
      public: null,
      pluralName: null,
      type: null,
    };
  }
  getName() {
    let me = this;
    let curDir = _.last(process.cwd().split(path.sep));
    return Inquirer.prompt([{
      type: 'input',
      name: 'name',
      message: 'Model Name:',
      default: me.options.name || curDir.toLowerCase(),
      validate: (name: string) => {
        if (_.isNull(Joi.validate(name, Joi.string().required(), {convert: false}).error)) {
          return true;
        } else {
          return 'Model Name is required!';
        }
      },
    }]).then((answers: Answers) => {
      me.options.name = answers.name;
      me.options.camelName = _.camelCase(answers.name);
      me.options.snakeName = _.snakeCase(answers.name);
      me.options.capitalName = me.options.camelName.charAt(0).toUpperCase() + me.options.camelName.substr(1);
      return me.options.name;
    });
  }
  getDataSource() {
    let me = this;
    return Inquirer.prompt([{
      type: 'list',
      name: 'dataSource',
      message: `Select the data-source to attach ${me.options.name} to?`,
      choices: [
        {
          name: 'Persisted DataBase (db)',
          value: 'db'
        }, {
          name: 'Memory DataBase (memoryDb)',
          value: 'memoryDb'
        }, {
          name: 'Other',
          value: 'other'
        }
      ],
      default: 'db',
    }]).then((answers: Answers) => {
      if (answers.dataSource === 'other') {
        return Inquirer.prompt([{
          type: 'input',
          name: 'dataSource',
          message: `Enter data-source to attach ${me.options.name} to:`,
          validate: (name: string) => {
            if (_.isNull(Joi.validate(name, Joi.string().required(), {convert: false}).error)) {
              return true;
            } else {
              return 'Data Source name is required!';
            }
          }
        }]).then((answers: Answers) => {
          me.options.dataSource = answers.dataSource;
          return answers.dataSource;
        });
      } else {
        me.options.dataSource = answers.dataSource;
        return answers.dataSource;
      }
    });
  }
  getBaseClass() {
    let me = this;
    let choices = ExtLB.default.models;
    let localModels = null;
    if (shelljs.test('-e', `${process.cwd()}${path.sep}config${path.sep}server${path.sep}model-config.json`)) {
      localModels = require(`${process.cwd()}${path.sep}config${path.sep}server${path.sep}model-config.json`);
    } else if (shelljs.test('-e', `${process.cwd()}${path.sep}server${path.sep}model-config.json`)) {
      localModels = require(`${process.cwd()}${path.sep}server${path.sep}model-config.json`);
    }
    if (!_.isNull(localModels)) {
      _.each(_.keys(localModels), (localModel) => {
        if (_.findIndex(choices, {name: localModel}) === -1) {
          choices.push({
            name: localModel,
            value: localModel,
          });
        }
      });
    }
    return Inquirer.prompt([{
      type: 'list',
      name: 'baseClass',
      message: 'Select model\'s base class:',
      choices: ExtLB.default.models,
      default: 'PersistedModel',
    }]).then((answers: Answers) => {
      if (answers.baseClass === 'custom') {
        return Inquirer.prompt([{
          type: 'input',
          name: 'baseClass',
          message: 'Select model\'s base class:',
          validate: (name: string) => {
            if (_.isNull(Joi.validate(name, Joi.string().required(), {convert: false}).error)) {
              return true;
            } else {
              return 'Base Class name is required!';
            }
          }
        }]).then((answers: Answers) => {
          me.options.baseClass = answers.baseClass;
          return answers.baseClass;
        });
      } else {
        me.options.baseClass = answers.baseClass;
        return answers.baseClass;
      }
    });
  }
  getPublic() {
    let me = this;
    return Inquirer.prompt([{
      type: 'confirm',
      name: 'public',
      message: `Expose ${me.options.name} via the REST API?`,
      default: true,
    }]).then((answers: Answers) => {
      me.options.public = answers.public;
      return answers.public;
    });
  }
  getPlural() {
    let me = this;
    return Inquirer.prompt([{
      type: 'input',
      name: 'plural',
      message: 'Custom plural form (used to build REST URL):',
      default: pluralize.plural(me.options.name),
      validate: (name: string) => {
        if (_.isNull(Joi.validate(name, Joi.string().required(), {convert: false}).error)) {
          return true;
        } else {
          return 'Plural form is required!';
        }
      },
    }]).then((answers: Answers) => {
      me.options.pluralName = answers.plural;
      return answers.plural;
    });
  }
  getType() {
    let me = this;
    return Inquirer.prompt([{
      type: 'list',
      name: 'type',
      message: 'Common model or server only?',
      choices: [
        {name: 'common', value: 'common'},
        {name: 'server', value: 'server'},
      ],
      default: 'common',
    }]).then((answers: Answers) => {
      me.options.type = answers.type;
      return answers.type
    });
  }
}

exports.command = 'model';
exports.describe = 'Create a new ExtLoop Model';
exports.builder = {};
exports.handler = (argv: Arguments) => {
  const app = new Model();
  app.getName().then(() => {
    return app.getDataSource();
  }).then(() => {
    return app.getBaseClass();
  }).then(() => {
    return app.getPublic();
  }).then(() => {
    return app.getPlural();
  }).then(() => {
    return app.getType();
  }).then(() => {
    ExtLB.default.createModel(app.options);
  }).catch((err) => {
    console.error(err);
  });
};