require 'rails_helper'
require_relative '../dummy_provider'

RSpec.describe DiscourseChat::Rule do
  include_context "dummy provider"

  let(:tag1){Fabricate(:tag)}
  let(:tag2){Fabricate(:tag)}

  let(:channel){DiscourseChat::Channel.create(provider:'dummy')}

  describe '.alloc_key' do
    it 'should return sequential numbers' do 
      expect( DiscourseChat::Rule.create(channel: channel).key ).to eq("rule:1")
      expect( DiscourseChat::Rule.create(channel: channel).key ).to eq("rule:2")
      expect( DiscourseChat::Rule.create(channel: channel).key ).to eq("rule:3")
    end
  end

  it 'should convert between channel and channel_id successfully' do
    rule = DiscourseChat::Rule.create(channel: channel)
    expect( rule.channel_id ).to eq(channel.id)
    expect( rule.channel.id ).to eq(channel.id)
  end

  it 'should save and load successfully' do
    expect(DiscourseChat::Rule.all.length).to eq(0)

    rule = DiscourseChat::Rule.create({
          channel: channel,
          category_id: 1,
          tags: [tag1.name, tag2.name],
          filter: 'watch'
        })

    expect(DiscourseChat::Rule.all.length).to eq(1)

    loadedRule = DiscourseChat::Rule.find(rule.id)

    expect(loadedRule.channel.id).to eq(channel.id)
    expect(loadedRule.category_id).to eq(1)
    expect(loadedRule.tags).to contain_exactly(tag1.name,tag2.name)
    expect(loadedRule.filter).to eq('watch')

  end

  describe 'general operations' do
    before do
      rule = DiscourseChat::Rule.create({
          channel: channel,
          category_id: 1,
          tags: [tag1.name, tag2.name]
        })
    end

    it 'can be modified' do
      rule = DiscourseChat::Rule.all.first
      rule.tags = [tag1.name]

      rule.save!

      rule = DiscourseChat::Rule.all.first
      expect(rule.tags).to contain_exactly(tag1.name)
    end

    it 'can be deleted' do
      DiscourseChat::Rule.new(channel:channel).save!
      expect(DiscourseChat::Rule.all.length).to eq(2)

      rule = DiscourseChat::Rule.all.first
      rule.destroy

      expect(DiscourseChat::Rule.all.length).to eq(1)
    end

    it 'can delete all' do
      DiscourseChat::Rule.create({channel:channel})
      DiscourseChat::Rule.create({channel:channel})
      DiscourseChat::Rule.create({channel:channel})
      DiscourseChat::Rule.create({channel:channel})
      
      expect(DiscourseChat::Rule.all.length).to eq(5)

      DiscourseChat::Rule.destroy_all

      expect(DiscourseChat::Rule.all.length).to eq(0)
    end

    it 'can be filtered by channel' do
      channel2 = DiscourseChat::Channel.create(provider:'dummy')
      channel3 = DiscourseChat::Channel.create(provider:'dummy')

      rule2 = DiscourseChat::Rule.create(channel:channel)
      rule3 = DiscourseChat::Rule.create(channel:channel)
      rule4 = DiscourseChat::Rule.create(channel:channel2)
      rule5 = DiscourseChat::Rule.create(channel:channel3)
      
      expect(DiscourseChat::Rule.all.length).to eq(5)

      expect(DiscourseChat::Rule.with_channel(channel).length).to eq(3)
      expect(DiscourseChat::Rule.with_channel(channel2).length).to eq(1)
    end

    it 'can be filtered by category' do
      rule2 = DiscourseChat::Rule.create(channel:channel, category_id: 1)
      rule3 = DiscourseChat::Rule.create(channel:channel, category_id: nil)

      expect(DiscourseChat::Rule.all.length).to eq(3)

      expect(DiscourseChat::Rule.with_category_id(1).length).to eq(2)
      expect(DiscourseChat::Rule.with_category_id(nil).length).to eq(1)
    end

    it 'can be sorted by precedence' do
      rule2 = DiscourseChat::Rule.create(channel:channel, filter:'mute')
      rule3 = DiscourseChat::Rule.create(channel:channel, filter:'follow')
      rule4 = DiscourseChat::Rule.create(channel:channel, filter:'mute')

      expect(DiscourseChat::Rule.all.length).to eq(4)

      expect(DiscourseChat::Rule.all.order_by_precedence.map(&:filter)).to eq(["mute", "mute", "watch", "follow"])
    end
  end

  describe 'validations' do
    
    let(:rule) do
      DiscourseChat::Rule.create({
          filter: 'watch',
          channel: channel,
          category_id: 1,
        })
    end

    it 'validates channel correctly' do
      expect(rule.valid?).to eq(true)
      rule.channel_id = 'blahblahblah'
      expect(rule.valid?).to eq(false)
      rule.channel_id = -1
      expect(rule.valid?).to eq(false)
    end

    it 'validates category correctly' do
      expect(rule.valid?).to eq(true)
      rule.category_id = 99
      expect(rule.valid?).to eq(false)
    end

    it 'validates filter correctly' do
      expect(rule.valid?).to eq(true)
      rule.filter = 'follow'
      expect(rule.valid?).to eq(true)
      rule.filter = 'mute'
      expect(rule.valid?).to eq(true)
      rule.filter = ''
      expect(rule.valid?).to eq(false)
      rule.filter = 'somerandomstring'
      expect(rule.valid?).to eq(false)
    end

    it 'validates tags correctly' do
      expect(rule.valid?).to eq(true)
      rule.tags = []
      expect(rule.valid?).to eq(true)
      rule.tags = [tag1.name]
      expect(rule.valid?).to eq(true)
      rule.tags = [tag1.name, 'blah']
      expect(rule.valid?).to eq(false)
    end

    it "doesn't allow save when invalid" do
      expect(rule.valid?).to eq(true)
      rule.filter = 'somerandomfilter'
      expect(rule.valid?).to eq(false)
      expect(rule.save).to eq(false)
    end

  end
end