// Licensed to Elasticsearch B.V under one or more agreements.
// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information

'use strict'

const { test } = require('tap')
const { URL } = require('url')
const BaseConnectionPool = require('../../lib/pool/BaseConnectionPool')
const Connection = require('../../lib/Connection')

test('API', t => {
  t.test('addConnection', t => {
    const pool = new BaseConnectionPool({ Connection })
    const href = 'http://localhost:9200/'
    pool.addConnection(href)
    t.ok(pool.connections.find(c => c.id === href) instanceof Connection)
    t.strictEqual(pool.connections.find(c => c.id === href).status, Connection.statuses.ALIVE)
    t.end()
  })

  t.test('addConnection should throw with two connections with the same id', t => {
    const pool = new BaseConnectionPool({ Connection })
    const href = 'http://localhost:9200/'
    pool.addConnection(href)
    try {
      pool.addConnection(href)
      t.fail('Should throw')
    } catch (err) {
      t.is(err.message, `Connection with id '${href}' is already present`)
    }
    t.end()
  })

  t.test('addConnection should handle not-friendly url parameters for user and password', t => {
    const pool = new BaseConnectionPool({ Connection })
    const href = 'http://us"er:p@assword@localhost:9200/'
    pool.addConnection(href)
    const conn = pool.connections[0]
    t.strictEqual(conn.url.username, 'us%22er')
    t.strictEqual(conn.url.password, 'p%40assword')
    t.match(conn.headers, {
      authorization: 'Basic ' + Buffer.from('us"er:p@assword').toString('base64')
    })
    t.end()
  })

  t.test('markDead', t => {
    const pool = new BaseConnectionPool({ Connection, sniffEnabled: true })
    const href = 'http://localhost:9200/'
    var connection = pool.addConnection(href)
    t.same(pool.markDead(connection), pool)
    connection = pool.connections.find(c => c.id === href)
    t.strictEqual(connection.status, Connection.statuses.ALIVE)
    t.end()
  })

  t.test('markAlive', t => {
    const pool = new BaseConnectionPool({ Connection, sniffEnabled: true })
    const href = 'http://localhost:9200/'
    var connection = pool.addConnection(href)
    t.same(pool.markAlive(connection), pool)
    connection = pool.connections.find(c => c.id === href)
    t.strictEqual(connection.status, Connection.statuses.ALIVE)
    t.end()
  })

  t.test('getConnection should throw', t => {
    const pool = new BaseConnectionPool({ Connection })
    const href = 'http://localhost:9200/'
    pool.addConnection(href)
    try {
      pool.getConnection()
      t.fail('Should fail')
    } catch (err) {
      t.is(err.message, 'getConnection must be implemented')
    }
    t.end()
  })

  t.test('removeConnection', t => {
    const pool = new BaseConnectionPool({ Connection })
    const href = 'http://localhost:9200/'
    var connection = pool.addConnection(href)
    pool.removeConnection(connection)
    t.strictEqual(pool.size, 0)
    t.end()
  })

  t.test('empty', t => {
    const pool = new BaseConnectionPool({ Connection })
    pool.addConnection('http://localhost:9200/')
    pool.addConnection('http://localhost:9201/')
    pool.empty(() => {
      t.strictEqual(pool.size, 0)
      t.end()
    })
  })

  t.test('urlToHost', t => {
    const pool = new BaseConnectionPool({ Connection })
    const url = 'http://localhost:9200'
    t.deepEqual(
      pool.urlToHost(url),
      { url: new URL(url) }
    )
    t.end()
  })

  t.test('nodesToHost', t => {
    t.test('publish_address as ip address (IPv4)', t => {
      const pool = new BaseConnectionPool({ Connection })
      const nodes = {
        a1: {
          http: {
            publish_address: '127.0.0.1:9200'
          },
          roles: ['master', 'data', 'ingest']
        },
        a2: {
          http: {
            publish_address: '127.0.0.1:9201'
          },
          roles: ['master', 'data', 'ingest']
        }
      }

      t.deepEqual(pool.nodesToHost(nodes, 'http:'), [{
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: {
          master: true,
          data: true,
          ingest: true,
          ml: false
        }
      }, {
        url: new URL('http://127.0.0.1:9201'),
        id: 'a2',
        roles: {
          master: true,
          data: true,
          ingest: true,
          ml: false
        }
      }])

      t.strictEqual(pool.nodesToHost(nodes, 'http:')[0].url.host, '127.0.0.1:9200')
      t.strictEqual(pool.nodesToHost(nodes, 'http:')[1].url.host, '127.0.0.1:9201')
      t.end()
    })

    t.test('publish_address as ip address (IPv6)', t => {
      const pool = new BaseConnectionPool({ Connection })
      const nodes = {
        a1: {
          http: {
            publish_address: '[::1]:9200'
          },
          roles: ['master', 'data', 'ingest']
        },
        a2: {
          http: {
            publish_address: '[::1]:9201'
          },
          roles: ['master', 'data', 'ingest']
        }
      }

      t.deepEqual(pool.nodesToHost(nodes, 'http:'), [{
        url: new URL('http://[::1]:9200'),
        id: 'a1',
        roles: {
          master: true,
          data: true,
          ingest: true,
          ml: false
        }
      }, {
        url: new URL('http://[::1]:9201'),
        id: 'a2',
        roles: {
          master: true,
          data: true,
          ingest: true,
          ml: false
        }
      }])

      t.strictEqual(pool.nodesToHost(nodes, 'http:')[0].url.host, '[::1]:9200')
      t.strictEqual(pool.nodesToHost(nodes, 'http:')[1].url.host, '[::1]:9201')
      t.end()
    })

    t.test('publish_address as host/ip (IPv4)', t => {
      const pool = new BaseConnectionPool({ Connection })
      const nodes = {
        a1: {
          http: {
            publish_address: 'example.com/127.0.0.1:9200'
          },
          roles: ['master', 'data', 'ingest']
        },
        a2: {
          http: {
            publish_address: 'example.com/127.0.0.1:9201'
          },
          roles: ['master', 'data', 'ingest']
        }
      }

      t.deepEqual(pool.nodesToHost(nodes, 'http:'), [{
        url: new URL('http://example.com:9200'),
        id: 'a1',
        roles: {
          master: true,
          data: true,
          ingest: true,
          ml: false
        }
      }, {
        url: new URL('http://example.com:9201'),
        id: 'a2',
        roles: {
          master: true,
          data: true,
          ingest: true,
          ml: false
        }
      }])

      t.strictEqual(pool.nodesToHost(nodes, 'http:')[0].url.host, 'example.com:9200')
      t.strictEqual(pool.nodesToHost(nodes, 'http:')[1].url.host, 'example.com:9201')
      t.end()
    })

    t.test('publish_address as host/ip (IPv6)', t => {
      const pool = new BaseConnectionPool({ Connection })
      const nodes = {
        a1: {
          http: {
            publish_address: 'example.com/[::1]:9200'
          },
          roles: ['master', 'data', 'ingest']
        },
        a2: {
          http: {
            publish_address: 'example.com/[::1]:9201'
          },
          roles: ['master', 'data', 'ingest']
        }
      }

      t.deepEqual(pool.nodesToHost(nodes, 'http:'), [{
        url: new URL('http://example.com:9200'),
        id: 'a1',
        roles: {
          master: true,
          data: true,
          ingest: true,
          ml: false
        }
      }, {
        url: new URL('http://example.com:9201'),
        id: 'a2',
        roles: {
          master: true,
          data: true,
          ingest: true,
          ml: false
        }
      }])

      t.strictEqual(pool.nodesToHost(nodes, 'http:')[0].url.host, 'example.com:9200')
      t.strictEqual(pool.nodesToHost(nodes, 'http:')[1].url.host, 'example.com:9201')
      t.end()
    })

    t.test('Should use the configure protocol', t => {
      const pool = new BaseConnectionPool({ Connection })
      const nodes = {
        a1: {
          http: {
            publish_address: 'example.com/127.0.0.1:9200'
          },
          roles: ['master', 'data', 'ingest']
        },
        a2: {
          http: {
            publish_address: 'example.com/127.0.0.1:9201'
          },
          roles: ['master', 'data', 'ingest']
        }
      }

      t.strictEqual(pool.nodesToHost(nodes, 'https:')[0].url.protocol, 'https:')
      t.strictEqual(pool.nodesToHost(nodes, 'http:')[1].url.protocol, 'http:')
      t.end()
    })

    t.end()
  })

  t.test('update', t => {
    t.test('Should not update existing connections', t => {
      t.plan(2)
      const pool = new BaseConnectionPool({ Connection })
      pool.addConnection([{
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: {
          master: true,
          data: true,
          ingest: true
        }
      }, {
        url: new URL('http://127.0.0.1:9201'),
        id: 'a2',
        roles: {
          master: true,
          data: true,
          ingest: true
        }
      }])

      pool.update([{
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: null
      }, {
        url: new URL('http://127.0.0.1:9201'),
        id: 'a2',
        roles: null
      }])

      t.ok(pool.connections.find(c => c.id === 'a1').roles !== null)
      t.ok(pool.connections.find(c => c.id === 'a2').roles !== null)
    })

    t.test('Should not update existing connections (mark alive)', t => {
      t.plan(5)
      class CustomBaseConnectionPool extends BaseConnectionPool {
        markAlive (connection) {
          t.ok('called')
          super.markAlive(connection)
        }
      }
      const pool = new CustomBaseConnectionPool({ Connection })
      const conn1 = pool.addConnection({
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: {
          master: true,
          data: true,
          ingest: true
        }
      })

      const conn2 = pool.addConnection({
        url: new URL('http://127.0.0.1:9201'),
        id: 'a2',
        roles: {
          master: true,
          data: true,
          ingest: true
        }
      })

      pool.markDead(conn1)
      pool.markDead(conn2)

      pool.update([{
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: null
      }, {
        url: new URL('http://127.0.0.1:9201'),
        id: 'a2',
        roles: null
      }])

      t.ok(pool.connections.find(c => c.id === 'a1').roles !== null)
      t.ok(pool.connections.find(c => c.id === 'a2').roles !== null)
    })

    t.test('Should not update existing connections (same url, different id)', t => {
      t.plan(3)
      class CustomBaseConnectionPool extends BaseConnectionPool {
        markAlive (connection) {
          t.ok('called')
          super.markAlive(connection)
        }
      }
      const pool = new CustomBaseConnectionPool({ Connection })
      pool.addConnection([{
        url: new URL('http://127.0.0.1:9200'),
        id: 'http://127.0.0.1:9200/',
        roles: {
          master: true,
          data: true,
          ingest: true
        }
      }])

      pool.update([{
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: true
      }])

      // roles will never be updated, we only use it to do
      // a dummy check to see if the connection has been updated
      t.deepEqual(pool.connections.find(c => c.id === 'a1').roles, {
        master: true,
        data: true,
        ingest: true,
        ml: false
      })
      t.strictEqual(pool.connections.find(c => c.id === 'http://127.0.0.1:9200/'), undefined)
    })

    t.test('Add a new connection', t => {
      t.plan(2)
      const pool = new BaseConnectionPool({ Connection })
      pool.addConnection({
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: {
          master: true,
          data: true,
          ingest: true
        }
      })

      pool.update([{
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: null
      }, {
        url: new URL('http://127.0.0.1:9201'),
        id: 'a2',
        roles: null
      }])

      t.ok(pool.connections.find(c => c.id === 'a1').roles !== null)
      t.ok(pool.connections.find(c => c.id === 'a2'))
    })

    t.test('Remove old connections', t => {
      t.plan(3)
      const pool = new BaseConnectionPool({ Connection })
      pool.addConnection({
        url: new URL('http://127.0.0.1:9200'),
        id: 'a1',
        roles: null
      })

      pool.update([{
        url: new URL('http://127.0.0.1:9200'),
        id: 'a2',
        roles: null
      }, {
        url: new URL('http://127.0.0.1:9201'),
        id: 'a3',
        roles: null
      }])

      t.false(pool.connections.find(c => c.id === 'a1'))
      t.true(pool.connections.find(c => c.id === 'a2'))
      t.true(pool.connections.find(c => c.id === 'a3'))
    })

    t.end()
  })

  t.test('CreateConnection', t => {
    t.plan(1)
    const pool = new BaseConnectionPool({ Connection })
    const conn = pool.createConnection('http://localhost:9200')
    pool.connections.push(conn)
    try {
      pool.createConnection('http://localhost:9200')
      t.fail('Should throw')
    } catch (err) {
      t.is(err.message, 'Connection with id \'http://localhost:9200/\' is already present')
    }
  })

  t.end()
})