'use strict';

const t = require('koa-joi-router').Joi;

const Category = t.object().label('Category').keys({
   id: t.number(),
   name: t.string()
});

const Tag = t.object().label('Tag').keys({
   id: t.number(),
   name: t.string()
});

const Pet = t.object().label('Pet').keys({
   id: t.number().optional(),
   name: t.string().required(),
   category: Category,
   tags: t.array().items(Tag),
   photoUrls: t.array().items(t.string()).required(),
   status: t.string()
      .valid(['available', 'pending', 'sold'])
      .description('pet status in the store')
});

const createPet = {
   method: 'post',
   path: '/pet',
   meta: {
      friendlyName: 'Add pet',
      description: 'Add a new pet to the store'
   },
   validate: {
      type: 'json',
      body: Pet
   },
   *handler () {
      const pet = this.request.body;
      return yield this.db().table('pets').insert(pet).run();
   }
};

const updatePet = {
   method: 'put',
   path: '/pet',
   meta: {
      friendlyName: 'Update pet',
      description: 'Update an existing pet'
   },
   validate: {
      type: 'json',
      body: Pet
   },
   *handler () {
      const pet = this.request.body;
      if (!pet.id) this.throw(400, 'Invalid ID supplied');

      const existing = this.db().get(pet.id).run();
      if (!existing) this.throw(404, 'Pet not found');

      return this.db().table('pets').update(pet).run();
   }
};


const getPetByStatus = {
   method: 'put',
   path: '/pet',
   meta: {
      friendlyName: 'Find pets by status'
   },
   validate: {
      type: 'json',
      query: {
         status: t.array()
            .description('Status values that need to be considered for filter')
            .items(t.string())
            .min(1)        // At least 1 should be provided
            .single()      // If only one is provided, wrap it in an array
      },
      output: {
        200: {
          body: t.array().items(Pet.requiredKeys('id', 'status')),
          header: {
            'Content-Type': t.string()
          }
        }
      }
   },
   *handler () {
      const query = this.request.query;

      return yield this.db()
         .table('pets')
         .getAll(query.status)
         .run();
   }
};

module.exports = [
   createPet,
   updatePet,
   getPetByStatus
];