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defmodule PlausibleWeb.EmailTest do
  use Plausible.DataCase, async: true

  import Plausible.Factory

  alias PlausibleWeb.Email

  describe "base_email layout" do
    test "greets user by first name if user in template assigns" do
      email =
        Email.base_email()
        |> Email.render("welcome_email.html", %{
          user: build(:user, name: "John Doe"),
          code: "123"
        })

      assert email.html_body =~ "Hey John,"
      assert email.text_body =~ "Hey John,"
    end

    test "greets impersonally when user not in template assigns" do
      email =
        Email.base_email()
        |> Email.render("welcome_email.html")

      assert email.html_body =~ "Hey,"
      assert email.text_body =~ "Hey,"
    end

    test "renders plausible link" do
      email =
        Email.base_email()
        |> Email.render("welcome_email.html")

      assert email.html_body =~ plausible_link()
      assert email.text_body =~ plausible_url()
    end

    @tag :ee_only
    test "renders unsubscribe placeholder" do
      email =
        Email.base_email()
        |> Email.render("welcome_email.html")

      assert email.html_body =~ "{{{ pm:unsubscribe }}}"
    end

    test "can be disabled with a nil layout" do
      email =
        Email.base_email(%{layout: nil})
        |> Email.render("welcome_email.html", %{
          user: build(:user, name: "John Doe")
        })

      refute email.html_body =~ "Hey John,"

      refute email.text_body =~ "Hey John,"
    end
  end

  describe "priority email layout" do
    @tag :ee_only
    test "uses the `priority` message stream in Postmark in EE" do
      email =
        Email.priority_email()
        |> Email.render("activation_email.html", %{
          user: build(:user, name: "John Doe"),
          code: "123"
        })

      assert %{"MessageStream" => "priority"} = email.private[:message_params]
    end

    @tag :ce_build_only
    test "doesn't use the `priority` message stream in Postmark in CE" do
      email =
        Email.priority_email()
        |> Email.render("activation_email.html", %{
          user: build(:user, name: "John Doe"),
          code: "123"
        })

      refute email.private[:message_params]["MessageStream"]
    end

    test "greets user by first name if user in template assigns" do
      email =
        Email.priority_email()
        |> Email.render("activation_email.html", %{
          user: build(:user, name: "John Doe"),
          code: "123"
        })

      assert email.html_body =~ "Hey John,"
      assert email.text_body =~ "Hey John,"
    end

    test "greets impersonally when user not in template assigns" do
      email =
        Email.priority_email()
        |> Email.render("password_reset_email.html", %{
          reset_link: "imaginary"
        })

      assert email.html_body =~ "Hey,"
      assert email.text_body =~ "Hey,"
    end

    test "renders plausible link" do
      email =
        Email.priority_email()
        |> Email.render("password_reset_email.html", %{
          reset_link: "imaginary"
        })

      assert email.html_body =~ plausible_link()
      assert email.text_body =~ plausible_url()
    end

    test "does not render unsubscribe placeholder" do
      email =
        Email.priority_email()
        |> Email.render("password_reset_email.html", %{
          reset_link: "imaginary"
        })

      refute email.html_body =~ "{{{ pm:unsubscribe }}}"
    end

    test "can be disabled with a nil layout" do
      email =
        Email.priority_email(%{layout: nil})
        |> Email.render("password_reset_email.html", %{
          reset_link: "imaginary"
        })

      refute email.html_body =~ "Hey John,"
      refute email.html_body =~ plausible_link()

      refute email.text_body =~ "Hey John,"
      refute email.text_body =~ plausible_url()
    end
  end

  describe "over_limit_email/3" do
    test "renders usage, suggested plan, and links to upgrade and account settings" do
      user = build(:user)
      team = build(:team, identifier: Ecto.UUID.generate())
      penultimate_cycle = Date.range(~D[2023-03-01], ~D[2023-03-31])
      last_cycle = Date.range(~D[2023-04-01], ~D[2023-04-30])

      usage = %{
        penultimate_cycle: %{date_range: penultimate_cycle, total: 12_300},
        last_cycle: %{date_range: last_cycle, total: 32_100}
      }

      %{html_body: html_body, subject: subject} =
        PlausibleWeb.Email.over_limit_email(user, team, usage, "100k")

      assert subject == "[Action required] You have outgrown your Plausible subscription tier"

      assert html_body =~ PlausibleWeb.TextHelpers.format_date_range(last_cycle)
      assert html_body =~ "We recommend you upgrade to the 100k pageviews/month plan"
      assert html_body =~ "your account recorded 32,100 billable pageviews"

      assert html_body =~
               "cycle before that (#{PlausibleWeb.TextHelpers.format_date_range(penultimate_cycle)}), your account used 12,300 billable pageviews"

      assert text_of_element(
               html_body,
               ~s|a[href$="/billing/choose-plan?__team=#{team.identifier}"]|
             ) ==
               "Click here to upgrade your subscription"

      assert text_of_element(
               html_body,
               ~s|a[href$="/settings/billing/subscription?__team=#{team.identifier}"]|
             ) ==
               "account settings"

      assert html_body =~
               PlausibleWeb.Router.Helpers.billing_url(PlausibleWeb.Endpoint, :choose_plan) <>
                 "?__team=#{team.identifier}"
    end

    test "asks enterprise level usage to contact us" do
      user = build(:user)
      team = build(:team, identifier: Ecto.UUID.generate())
      penultimate_cycle = Date.range(~D[2023-03-01], ~D[2023-03-31])
      last_cycle = Date.range(~D[2023-04-01], ~D[2023-04-30])
      suggested_plan = :enterprise

      usage = %{
        penultimate_cycle: %{date_range: penultimate_cycle, total: 12_300},
        last_cycle: %{date_range: last_cycle, total: 32_100}
      }

      %{html_body: html_body} =
        PlausibleWeb.Email.over_limit_email(user, team, usage, suggested_plan)

      refute html_body =~ "Click here to upgrade your subscription"
      assert html_body =~ "Your usage exceeds our standard plans, so please reply back"
    end
  end

  describe "dashboard_locked/3" do
    test "renders usage, suggested plan, and links to upgrade and account settings" do
      user = build(:user)
      team = build(:team, identifier: Ecto.UUID.generate())
      penultimate_cycle = Date.range(~D[2023-03-01], ~D[2023-03-31])
      last_cycle = Date.range(~D[2023-04-01], ~D[2023-04-30])

      usage = %{
        penultimate_cycle: %{date_range: penultimate_cycle, total: 12_300},
        last_cycle: %{date_range: last_cycle, total: 32_100}
      }

      %{html_body: html_body, subject: subject} =
        PlausibleWeb.Email.dashboard_locked(user, team, usage, "100k")

      assert subject == "[Action required] Your Plausible dashboard is now locked"

      assert html_body =~ PlausibleWeb.TextHelpers.format_date_range(last_cycle)
      assert html_body =~ "We recommend you upgrade to the 100k pageviews/month plan"
      assert html_body =~ "your account recorded 32,100 billable pageviews"

      assert html_body =~
               "cycle before that (#{PlausibleWeb.TextHelpers.format_date_range(penultimate_cycle)}), the usage was 12,300 billable pageviews"

      assert text_of_element(
               html_body,
               ~s|a[href$="/billing/choose-plan?__team=#{team.identifier}"]|
             ) ==
               "Click here to upgrade your subscription"

      assert text_of_element(
               html_body,
               ~s|a[href$="/settings/billing/subscription?__team=#{team.identifier}"]|
             ) ==
               "account settings"

      assert html_body =~
               PlausibleWeb.Router.Helpers.billing_url(PlausibleWeb.Endpoint, :choose_plan) <>
                 "?__team=#{team.identifier}"
    end

    test "asks enterprise level usage to contact us" do
      user = build(:user)
      team = build(:team, identifier: Ecto.UUID.generate())
      penultimate_cycle = Date.range(~D[2023-03-01], ~D[2023-03-31])
      last_cycle = Date.range(~D[2023-04-01], ~D[2023-04-30])
      suggested_plan = :enterprise

      usage = %{
        penultimate_cycle: %{date_range: penultimate_cycle, total: 12_300},
        last_cycle: %{date_range: last_cycle, total: 32_100}
      }

      %{html_body: html_body} =
        PlausibleWeb.Email.dashboard_locked(user, team, usage, suggested_plan)

      refute html_body =~ "Click here to upgrade your subscription"
      assert html_body =~ "Your usage exceeds our standard plans, so please reply back"
    end
  end

  describe "enterprise_over_limit_internal_email/4" do
    test "renders pageview usage by billing cycles + sites usage/limit" do
      user = build(:user)
      penultimate_cycle = Date.range(~D[2023-03-01], ~D[2023-03-31])
      last_cycle = Date.range(~D[2023-04-01], ~D[2023-04-30])

      pageview_usage = %{
        penultimate_cycle: %{date_range: penultimate_cycle, total: 100_141_888},
        last_cycle: %{date_range: last_cycle, total: 100_222_999}
      }

      %{html_body: html_body, subject: subject} =
        PlausibleWeb.Email.enterprise_over_limit_internal_email(user, pageview_usage, 80, 50)

      assert subject == "#{user.email} has outgrown their enterprise plan"

      assert html_body =~
               "Last billing cycle: #{PlausibleWeb.TextHelpers.format_date_range(last_cycle)}"

      assert html_body =~ "Last cycle pageview usage: 100,222,999 billable pageviews"

      assert html_body =~
               "Penultimate billing cycle: #{PlausibleWeb.TextHelpers.format_date_range(penultimate_cycle)}"

      assert html_body =~ "Penultimate cycle pageview usage: 100,141,888 billable pageviews"
      assert html_body =~ "Site usage: 80 / 50 allowed sites"
    end
  end

  describe "approaching accept_traffic_until" do
    test "renders first warning" do
      user = build(:user, id: 123, name: "John Doe")
      team = build(:team, identifier: Ecto.UUID.generate())

      notification = %{
        id: user.id,
        email: user.email,
        deadline: Date.add(Date.utc_today(), 7),
        site_ids: [1, 2, 3],
        name: user.name,
        team: team
      }

      %{html_body: body, subject: subject} =
        PlausibleWeb.Email.approaching_accept_traffic_until(notification)

      assert subject == "Your stats stop collecting soon"
      assert body =~ plausible_link(team: team, label: "start a Plausible subscription")
      assert body =~ "Hey John,"

      assert body =~
               "Your sites are still sending us data, but your account is no longer active. We'll stop counting your stats next week."
    end

    test "renders final warning" do
      user = build(:user, id: 123, name: "John Doe")
      team = build(:team, identifier: Ecto.UUID.generate())

      notification = %{
        id: user.id,
        email: user.email,
        deadline: Date.add(Date.utc_today(), 1),
        site_ids: [1, 2, 3],
        name: user.name,
        team: team
      }

      %{html_body: body, subject: subject} =
        PlausibleWeb.Email.approaching_accept_traffic_until_tomorrow(notification)

      assert subject == "Your stats stop tomorrow"
      assert body =~ plausible_link(team: team, label: "start a Plausible subscription")

      assert body =~
               "Your sites are still sending us data, but your account is no longer active. We'll stop counting your stats tomorrow."
    end
  end

  describe "site setup emails" do
    setup do
      trial_user = new_user(trial_expiry_date: Date.add(Date.utc_today(), 100))
      site = new_site(owner: trial_user)

      emails = [
        PlausibleWeb.Email.create_site_email(trial_user),
        PlausibleWeb.Email.site_setup_help(trial_user, site.team, site),
        PlausibleWeb.Email.site_setup_success(trial_user, site)
      ]

      {:ok, emails: emails, user: trial_user, site: site}
    end

    test "create site email", %{user: user} do
      email = PlausibleWeb.Email.create_site_email(user)

      assert email.html_body =~
               "You’ve created your Plausible account but haven’t added a site yet."
    end

    test "site setup help email", %{user: user, site: site} do
      email = PlausibleWeb.Email.site_setup_help(user, site.team, site)

      assert email.html_body =~
               "We haven't recorded any traffic for #{site.domain} yet."
    end

    test "site setup success email", %{user: user, site: site} do
      email = PlausibleWeb.Email.site_setup_success(user, site)

      assert email.html_body =~ "Your first visitor is now visible in Plausible."
    end
  end

  describe "import emails" do
    setup do
      user = new_user()
      site = new_site(owner: user)

      {:ok, user: user, site: site}
    end

    for {source, success_phrase, failure_phrase} <- [
          {:google_analytics_4, "Your Google Analytics import has completed successfully",
           "Unfortunately, your Google Analytics import for"},
          {:universal_analytics, "Your Google Analytics import has completed successfully",
           "Unfortunately, your Google Analytics import for"},
          {:csv, "Your CSV import has completed successfully",
           "Unfortunately, your CSV import for"}
        ] do
      test "success email for #{source}", %{user: user, site: site} do
        site_import = insert(:site_import, site: site, source: unquote(source))
        PlausibleWeb.Email.import_success(site_import, user)

        email = PlausibleWeb.Email.import_success(site_import, user)

        assert email.text_body =~ unquote(success_phrase)
      end

      test "failure email for #{source}", %{user: user, site: site} do
        site_import = insert(:site_import, site: site, source: unquote(source))

        email = PlausibleWeb.Email.import_failure(site_import, user)

        assert email.text_body =~ unquote(failure_phrase)
      end
    end
  end

  describe "text_body" do
    test "welcome email" do
      email =
        Email.base_email()
        |> Email.render("welcome_email.html", %{
          user: build(:user, name: "John Doe"),
          code: "123"
        })

      assert email.text_body =~ "Welcome to Plausible."
    end
  end

  def plausible_url do
    PlausibleWeb.EmailView.plausible_url()
  end

  def plausible_link(opts \\ []) do
    suffix =
      if team = Keyword.get(opts, :team) do
        "?__team=#{team.identifier}"
      else
        ""
      end

    plausible_url = plausible_url()

    label =
      if label = Keyword.get(opts, :label) do
        label
      else
        plausible_url
      end

    "<a href=\"#{plausible_url <> suffix}\">#{label}</a>"
  end
end