# frozen_string_literal: true

RSpec.describe EmailSettingsValidator do
  let(:username) { "kwest@gmail.com" }
  let(:password) { "mbdtf" }

  describe "#validate_imap" do
    let(:host) { "imap.gmail.com" }
    let(:port) { 993 }

    let(:net_imap_stub) do
      obj = mock()
      obj.stubs(:login).returns(true)
      obj
    end

    before { Net::IMAP.stubs(:new).returns(net_imap_stub) }

    it "is valid if no error is raised" do
      net_imap_stub.stubs(:logout).returns(true)
      net_imap_stub.stubs(:disconnect).returns(true)
      expect {
        described_class.validate_imap(
          host: host,
          port: port,
          username: username,
          password: password,
        )
      }.not_to raise_error
    end

    it "is invalid if an error is raised" do
      net_imap_stub.stubs(:login).raises(
        Net::IMAP::NoResponseError,
        stub(data: stub(text: "no response")),
      )
      expect {
        described_class.validate_imap(
          host: host,
          port: port,
          username: username,
          password: password,
          debug: true,
        )
      }.to raise_error(Net::IMAP::NoResponseError)
    end

    it "logs a warning if debug: true passed in and still raises the error" do
      net_imap_stub.stubs(:login).raises(
        Net::IMAP::NoResponseError,
        stub(data: stub(text: "no response")),
      )
      Rails
        .logger
        .expects(:warn)
        .with(regexp_matches(/\[EmailSettingsValidator\] Error encountered/))
        .at_least_once
      expect {
        described_class.validate_imap(
          host: host,
          port: port,
          username: username,
          password: password,
          debug: true,
        )
      }.to raise_error(Net::IMAP::NoResponseError)
    end
  end

  describe "#validate_pop3" do
    let(:host) { "pop.gmail.com" }
    let(:port) { 995 }

    let(:net_pop3_stub) do
      obj = mock()
      obj.stubs(:auth_only).returns(true)
      obj.stubs(:enable_ssl).returns(true)
      obj
    end

    before { Net::POP3.stubs(:new).returns(net_pop3_stub) }

    it "is valid if no error is raised" do
      expect {
        described_class.validate_pop3(
          host: host,
          port: port,
          username: username,
          password: password,
        )
      }.not_to raise_error
    end

    it "is invalid if an error is raised" do
      net_pop3_stub.stubs(:auth_only).raises(Net::POPAuthenticationError, "invalid credentials")
      expect {
        described_class.validate_pop3(
          host: host,
          port: port,
          username: username,
          password: password,
          debug: true,
        )
      }.to raise_error(Net::POPAuthenticationError)
    end

    it "logs a warning if debug: true passed in and still raises the error" do
      Rails
        .logger
        .expects(:warn)
        .with(regexp_matches(/\[EmailSettingsValidator\] Error encountered/))
        .at_least_once
      net_pop3_stub.stubs(:auth_only).raises(Net::POPAuthenticationError, "invalid credentials")
      expect {
        described_class.validate_pop3(
          host: host,
          port: port,
          username: username,
          password: password,
          debug: true,
        )
      }.to raise_error(Net::POPAuthenticationError)
    end

    it "uses the correct ssl verify params if those settings are enabled" do
      SiteSetting.pop3_polling_ssl = true
      SiteSetting.pop3_polling_openssl_verify = true
      net_pop3_stub.expects(:enable_ssl).with(max_version: OpenSSL::SSL::TLS1_2_VERSION)
      expect {
        described_class.validate_pop3(
          host: host,
          port: port,
          username: username,
          password: password,
        )
      }.not_to raise_error
    end

    it "uses the correct ssl verify params if openssl_verify is not enabled" do
      SiteSetting.pop3_polling_ssl = true
      SiteSetting.pop3_polling_openssl_verify = false
      net_pop3_stub.expects(:enable_ssl).with(OpenSSL::SSL::VERIFY_NONE)
      expect {
        described_class.validate_pop3(
          host: host,
          port: port,
          username: username,
          password: password,
        )
      }.not_to raise_error
    end
  end

  describe "#validate_smtp" do
    let(:host) { "smtp.gmail.com" }
    let(:port) { 587 }
    let(:domain) { "gmail.com" }

    let(:net_smtp_stub) do
      obj = mock()
      obj.stubs(:start).returns(true)
      obj.stubs(:finish).returns(true)
      obj.stubs(:enable_tls).returns(true)
      obj.stubs(:enable_starttls_auto).returns(true)
      obj.stubs(:open_timeout=)
      obj.stubs(:read_timeout=)
      obj
    end

    before { Net::SMTP.stubs(:new).returns(net_smtp_stub) }

    it "is valid if no error is raised" do
      expect {
        described_class.validate_smtp(
          host: host,
          port: port,
          username: username,
          password: password,
          domain: domain,
        )
      }.not_to raise_error
    end

    it "is invalid if an error is raised" do
      net_smtp_stub.stubs(:start).raises(Net::SMTPAuthenticationError, "invalid credentials")
      expect {
        described_class.validate_smtp(
          host: host,
          port: port,
          username: username,
          password: password,
          domain: domain,
        )
      }.to raise_error(Net::SMTPAuthenticationError)
    end

    it "logs a warning if debug: true passed in and still raises the error" do
      Rails
        .logger
        .expects(:warn)
        .with(regexp_matches(/\[EmailSettingsValidator\] Error encountered/))
        .at_least_once
      net_smtp_stub.stubs(:start).raises(
        Net::SMTPAuthenticationError,
        stub(message: "invalid credentials"),
      )
      expect {
        described_class.validate_smtp(
          host: host,
          port: port,
          username: username,
          password: password,
          debug: true,
          domain: domain,
        )
      }.to raise_error(Net::SMTPAuthenticationError)
    end

    it "uses the correct ssl verify params for enable_tls if those settings are enabled" do
      net_smtp_stub.expects(:enable_tls)
      expect {
        described_class.validate_smtp(
          host: host,
          port: 465,
          username: username,
          password: password,
          domain: domain,
          openssl_verify_mode: "peer",
          enable_tls: true,
          enable_starttls_auto: false,
        )
      }.not_to raise_error
    end

    it "uses the correct ssl verify params for enable_starttls_auto if those settings are enabled" do
      net_smtp_stub.expects(:enable_starttls_auto)
      expect {
        described_class.validate_smtp(
          host: host,
          port: 587,
          username: username,
          password: password,
          domain: domain,
          openssl_verify_mode: "peer",
          enable_tls: false,
          enable_starttls_auto: true,
        )
      }.not_to raise_error
    end

    it "raises an ArgumentError if both enable_tls is true and enable_starttls_auto is true" do
      expect {
        described_class.validate_smtp(
          host: host,
          port: port,
          username: username,
          password: password,
          domain: domain,
          enable_ssl: true,
          enable_starttls_auto: true,
        )
      }.to raise_error(ArgumentError)
    end

    it "raises an ArgumentError if a bad authentication method is used" do
      expect {
        described_class.validate_smtp(
          host: host,
          port: port,
          username: username,
          password: password,
          domain: domain,
          authentication: :rubber_stamp,
        )
      }.to raise_error(ArgumentError)
    end

    it "corrects authentication method to login for office365" do
      net_smtp_stub.expects(:start).with("office365.com", username, password, :login)
      described_class.validate_smtp(
        host: "smtp.office365.com",
        port: port,
        username: username,
        password: password,
        domain: "office365.com",
      )
    end

    it "corrects authentication method to login for outlook" do
      net_smtp_stub.expects(:start).with("outlook.com", username, password, :login)
      described_class.validate_smtp(
        host: "smtp-mail.outlook.com",
        port: port,
        username: username,
        password: password,
        domain: "outlook.com",
      )
    end

    context "when the domain is not provided" do
      let(:domain) { nil }
      it "gets the domain from the host" do
        net_smtp_stub.expects(:start).with("gmail.com", username, password, :plain)
        described_class.validate_smtp(
          host: host,
          port: port,
          username: username,
          password: password,
          enable_tls: true,
          enable_starttls_auto: false,
        )
      end

      it "uses localhost when in development mode" do
        Rails.env.stubs(:development?).returns(true)
        net_smtp_stub.expects(:start).with("localhost", username, password, :plain)
        described_class.validate_smtp(
          host: host,
          port: port,
          username: username,
          password: password,
          enable_tls: true,
          enable_starttls_auto: false,
        )
      end
    end
  end
end