defmodule PlausibleWeb.StatsControllerTest do
  use PlausibleWeb.ConnCase, async: true
  use Plausible.Repo
  import Plausible.Test.Support.HTML

  describe "GET /:website - anonymous user" do
    test "public site - shows site stats", %{conn: conn} do
      site = insert(:site, public: true)
      populate_stats(site, [build(:pageview)])

      conn = get(conn, "/#{site.domain}")
      resp = html_response(conn, 200)
      assert element_exists?(resp, "div#stats-react-container")

      assert ["noindex, nofollow"] ==
               resp
               |> find("meta[name=robots]")
               |> Floki.attribute("content")

      assert text_of_element(resp, "title") == "Plausible · #{site.domain}"
    end

    test "plausible.io live demo - shows site stats", %{conn: conn} do
      site = insert(:site, domain: "plausible.io", public: true)
      populate_stats(site, [build(:pageview)])

      conn = get(conn, "/#{site.domain}")
      resp = html_response(conn, 200)
      assert element_exists?(resp, "div#stats-react-container")

      assert ["index, nofollow"] ==
               resp
               |> find("meta[name=robots]")
               |> Floki.attribute("content")

      assert text_of_element(resp, "title") == "Plausible Analytics: Live Demo"
    end

    test "public site - shows waiting for first pageview", %{conn: conn} do
      insert(:site, domain: "some-other-public-site.io", public: true)

      conn = get(conn, "/some-other-public-site.io")
      assert html_response(conn, 200) =~ "Need to see the snippet again?"
    end

    test "can not view stats of a private website", %{conn: conn} do
      conn = get(conn, "/test-site.com")
      assert html_response(conn, 404) =~ "There's nothing here"
    end
  end

  describe "GET /:website - as a logged in user" do
    setup [:create_user, :log_in, :create_site]

    test "can view stats of a website I've created", %{conn: conn, site: site} do
      populate_stats(site, [build(:pageview)])
      conn = get(conn, "/" <> site.domain)
      assert html_response(conn, 200) =~ "stats-react-container"
    end

    test "shows locked page if page is locked", %{conn: conn, user: user} do
      locked_site = insert(:site, locked: true, members: [user])
      conn = get(conn, "/" <> locked_site.domain)
      assert html_response(conn, 200) =~ "Dashboard locked"
    end

    test "can not view stats of someone else's website", %{conn: conn} do
      site = insert(:site)
      conn = get(conn, "/" <> site.domain)
      assert html_response(conn, 404) =~ "There&#39;s nothing here"
    end
  end

  describe "GET /:website - as a super admin" do
    setup [:create_user, :make_user_super_admin, :log_in]

    test "can view a private dashboard with stats", %{conn: conn} do
      site = insert(:site)
      populate_stats(site, [build(:pageview)])

      conn = get(conn, "/" <> site.domain)
      assert html_response(conn, 200) =~ "stats-react-container"
    end

    test "can view a private dashboard without stats", %{conn: conn} do
      site = insert(:site)

      conn = get(conn, "/" <> site.domain)
      assert html_response(conn, 200) =~ "Need to see the snippet again?"
    end

    test "can view a private locked dashboard with stats", %{conn: conn} do
      user = insert(:user)
      site = insert(:site, locked: true, members: [user])
      populate_stats(site, [build(:pageview)])

      conn = get(conn, "/" <> site.domain)
      assert html_response(conn, 200) =~ "stats-react-container"
      assert html_response(conn, 200) =~ "This dashboard is actually locked"
    end

    test "can view a private locked dashboard without stats", %{conn: conn} do
      user = insert(:user)
      site = insert(:site, locked: true, members: [user])

      conn = get(conn, "/" <> site.domain)
      assert html_response(conn, 200) =~ "Need to see the snippet again?"
      assert html_response(conn, 200) =~ "This dashboard is actually locked"
    end

    test "can view a locked public dashboard", %{conn: conn} do
      site = insert(:site, locked: true, public: true)
      populate_stats(site, [build(:pageview)])

      conn = get(conn, "/" <> site.domain)
      assert html_response(conn, 200) =~ "stats-react-container"
    end
  end

  defp make_user_super_admin(%{user: user}) do
    Application.put_env(:plausible, :super_admin_user_ids, [user.id])
  end

  describe "GET /:website/export" do
    setup [:create_user, :create_new_site, :log_in]

    test "exports all the necessary CSV files", %{conn: conn, site: site} do
      conn = get(conn, "/" <> site.domain <> "/export")

      assert {"content-type", "application/zip; charset=utf-8"} =
               List.keyfind(conn.resp_headers, "content-type", 0)

      {:ok, zip} = :zip.unzip(response(conn, 200), [:memory])

      zip = Enum.map(zip, fn {filename, _} -> filename end)

      assert 'visitors.csv' in zip
      assert 'browsers.csv' in zip
      assert 'cities.csv' in zip
      assert 'conversions.csv' in zip
      assert 'countries.csv' in zip
      assert 'custom_props.csv' in zip
      assert 'devices.csv' in zip
      assert 'entry_pages.csv' in zip
      assert 'exit_pages.csv' in zip
      assert 'operating_systems.csv' in zip
      assert 'pages.csv' in zip
      assert 'prop_breakdown.csv' in zip
      assert 'regions.csv' in zip
      assert 'sources.csv' in zip
      assert 'utm_campaigns.csv' in zip
      assert 'utm_contents.csv' in zip
      assert 'utm_mediums.csv' in zip
      assert 'utm_sources.csv' in zip
      assert 'utm_terms.csv' in zip
    end

    test "exports data in zipped csvs", %{conn: conn, site: site} do
      populate_exported_stats(site)
      conn = get(conn, "/" <> site.domain <> "/export?date=2021-10-20")
      assert_zip(conn, "30d")
    end

    test "fails to export with interval=undefined, looking at you, spiders", %{
      conn: conn,
      site: site
    } do
      assert conn
             |> get("/" <> site.domain <> "/export?date=2021-10-20&interval=undefined")
             |> response(400)
    end

    test "exports allowed event props", %{conn: conn, site: site} do
      site = Plausible.Sites.set_allowed_event_props!(site, ["author", "logged_in"])

      populate_stats(site, [
        build(:pageview, "meta.key": ["author"], "meta.value": ["uku"]),
        build(:pageview, "meta.key": ["author"], "meta.value": ["uku"]),
        build(:event, "meta.key": ["author"], "meta.value": ["marko"], name: "Newsletter Signup"),
        build(:pageview, user_id: 999, "meta.key": ["logged_in"], "meta.value": ["true"]),
        build(:pageview, user_id: 999, "meta.key": ["logged_in"], "meta.value": ["true"]),
        build(:pageview, "meta.key": ["disallowed"], "meta.value": ["whatever"]),
        build(:pageview)
      ])

      conn = get(conn, "/" <> site.domain <> "/export?period=day")
      assert response = response(conn, 200)
      {:ok, zip} = :zip.unzip(response, [:memory])

      {_filename, result} =
        Enum.find(zip, fn {filename, _data} -> filename == 'custom_props.csv' end)

      assert parse_csv(result) == [
               ["property", "value", "visitors", "events", "percentage"],
               ["author", "(none)", "3", "4", "50.0"],
               ["author", "uku", "2", "2", "33.3"],
               ["author", "marko", "1", "1", "16.7"],
               ["logged_in", "(none)", "5", "5", "83.3"],
               ["logged_in", "true", "1", "2", "16.7"],
               [""]
             ]
    end

    test "exports data grouped by interval", %{conn: conn, site: site} do
      populate_exported_stats(site)
      conn = get(conn, "/" <> site.domain <> "/export?date=2021-10-20&period=30d&interval=week")

      assert response = response(conn, 200)
      {:ok, zip} = :zip.unzip(response, [:memory])

      {_filename, visitors} =
        Enum.find(zip, fn {filename, _data} -> filename == 'visitors.csv' end)

      assert parse_csv(visitors) == [
               [
                 "date",
                 "visitors",
                 "pageviews",
                 "visits",
                 "views_per_visit",
                 "bounce_rate",
                 "visit_duration"
               ],
               ["2021-09-20", "1", "1", "1", "1.0", "100", "0"],
               ["2021-09-27", "0", "0", "0", "0.0", "", ""],
               ["2021-10-04", "0", "0", "0", "0.0", "", ""],
               ["2021-10-11", "0", "0", "0", "0.0", "", ""],
               ["2021-10-18", "3", "3", "3", "1.0", "67", "20"],
               [""]
             ]
    end
  end

  defp parse_csv(file_content) when is_binary(file_content) do
    file_content
    |> String.split("\r\n")
    |> Enum.map(&String.split(&1, ","))
  end

  describe "GET /:website/export - via shared link" do
    test "exports data in zipped csvs", %{conn: conn} do
      site = insert(:site, domain: "new-site.com")
      link = insert(:shared_link, site: site)

      populate_exported_stats(site)
      conn = get(conn, "/" <> site.domain <> "/export?auth=#{link.slug}&date=2021-10-20")
      assert_zip(conn, "30d")
    end
  end

  describe "GET /:website/export - for past 6 months" do
    setup [:create_user, :create_new_site, :log_in]

    test "exports 6 months of data in zipped csvs", %{conn: conn, site: site} do
      populate_exported_stats(site)
      conn = get(conn, "/" <> site.domain <> "/export?period=6mo&date=2021-10-20")
      assert_zip(conn, "6m")
    end
  end

  describe "GET /:website/export - with path filter" do
    setup [:create_user, :create_new_site, :log_in]

    test "exports filtered data in zipped csvs", %{conn: conn, site: site} do
      populate_exported_stats(site)

      filters = Jason.encode!(%{page: "/some-other-page"})
      conn = get(conn, "/#{site.domain}/export?date=2021-10-20&filters=#{filters}")
      assert_zip(conn, "30d-filter-path")
    end
  end

  describe "GET /:website/export - with a custom prop filter" do
    setup [:create_user, :create_new_site, :log_in]

    test "custom-props.csv only returns the prop and its value in filter", %{
      conn: conn,
      site: site
    } do
      site = Plausible.Sites.set_allowed_event_props!(site, ["author", "logged_in"])

      populate_stats(site, [
        build(:pageview, "meta.key": ["author"], "meta.value": ["uku"]),
        build(:pageview, "meta.key": ["author"], "meta.value": ["marko"]),
        build(:pageview, "meta.key": ["logged_in"], "meta.value": ["true"])
      ])

      filters = Jason.encode!(%{props: %{author: "marko"}})
      conn = get(conn, "/" <> site.domain <> "/export?period=day&filters=#{filters}")

      {:ok, zip} = :zip.unzip(response(conn, 200), [:memory])

      {_filename, result} =
        Enum.find(zip, fn {filename, _data} -> filename == 'custom_props.csv' end)

      assert parse_csv(result) == [
               ["property", "value", "visitors", "events", "percentage"],
               ["author", "marko", "1", "1", "100.0"],
               [""]
             ]
    end
  end

  defp assert_zip(conn, folder) do
    assert conn.status == 200

    assert {"content-type", "application/zip; charset=utf-8"} =
             List.keyfind(conn.resp_headers, "content-type", 0)

    {:ok, zip} = :zip.unzip(response(conn, 200), [:memory])

    folder = Path.expand(folder, "test/plausible_web/controllers/CSVs")

    Enum.map(zip, &assert_csv(&1, folder))
  end

  defp assert_csv({file, downloaded}, folder) do
    file = Path.expand(file, folder)

    {:ok, content} = File.read(file)
    msg = "CSV file comparison failed (#{file})"
    assert downloaded == content, message: msg, left: downloaded, right: content
  end

  defp populate_exported_stats(site) do
    populate_stats(site, [
      build(:pageview,
        country_code: "EE",
        subdivision1_code: "EE-37",
        city_geoname_id: 588_409,
        pathname: "/",
        timestamp:
          Timex.shift(~N[2021-10-20 12:00:00], minutes: -1) |> NaiveDateTime.truncate(:second),
        referrer_source: "Google",
        user_id: 123
      ),
      build(:pageview,
        country_code: "EE",
        subdivision1_code: "EE-37",
        city_geoname_id: 588_409,
        pathname: "/some-other-page",
        timestamp:
          Timex.shift(~N[2021-10-20 12:00:00], minutes: -2) |> NaiveDateTime.truncate(:second),
        referrer_source: "Google",
        user_id: 123
      ),
      build(:pageview,
        pathname: "/",
        utm_medium: "search",
        utm_campaign: "ads",
        utm_source: "google",
        utm_content: "content",
        utm_term: "term",
        timestamp:
          Timex.shift(~N[2021-10-20 12:00:00], days: -1) |> NaiveDateTime.truncate(:second),
        browser: "ABrowserName"
      ),
      build(:pageview,
        timestamp:
          Timex.shift(~N[2021-10-20 12:00:00], months: -1) |> NaiveDateTime.truncate(:second),
        country_code: "EE",
        browser: "ABrowserName"
      ),
      build(:pageview,
        timestamp:
          Timex.shift(~N[2021-10-20 12:00:00], months: -5) |> NaiveDateTime.truncate(:second),
        utm_campaign: "ads",
        country_code: "EE",
        referrer_source: "Google",
        browser: "ABrowserName"
      ),
      build(:event,
        timestamp:
          Timex.shift(~N[2021-10-20 12:00:00], days: -1) |> NaiveDateTime.truncate(:second),
        name: "Signup",
        "meta.key": ["variant"],
        "meta.value": ["A"]
      )
    ])

    insert(:goal, %{site: site, event_name: "Signup"})
  end

  describe "GET /:website/export - with goal filter" do
    setup [:create_user, :create_new_site, :log_in]

    test "exports goal-filtered data in zipped csvs", %{conn: conn, site: site} do
      populate_exported_stats(site)
      filters = Jason.encode!(%{goal: "Signup"})
      conn = get(conn, "/#{site.domain}/export?date=2021-10-20&filters=#{filters}")
      assert_zip(conn, "30d-filter-goal")
    end

    test "custom-props.csv only returns the prop names for the goal in filter", %{
      conn: conn,
      site: site
    } do
      site = Plausible.Sites.set_allowed_event_props!(site, ["author", "logged_in"])

      populate_stats(site, [
        build(:event, name: "Newsletter Signup", "meta.key": ["author"], "meta.value": ["uku"]),
        build(:event, name: "Newsletter Signup", "meta.key": ["author"], "meta.value": ["marko"]),
        build(:event, name: "Newsletter Signup", "meta.key": ["author"], "meta.value": ["marko"]),
        build(:pageview, "meta.key": ["logged_in"], "meta.value": ["true"])
      ])

      filters = Jason.encode!(%{goal: "Newsletter Signup"})
      conn = get(conn, "/" <> site.domain <> "/export?period=day&filters=#{filters}")

      {:ok, zip} = :zip.unzip(response(conn, 200), [:memory])

      {_filename, result} =
        Enum.find(zip, fn {filename, _data} -> filename == 'custom_props.csv' end)

      assert parse_csv(result) == [
               ["property", "value", "visitors", "events", "conversion_rate"],
               ["author", "marko", "2", "2", "50.0"],
               ["author", "uku", "1", "1", "25.0"],
               [""]
             ]
    end
  end

  describe "GET /share/:domain?auth=:auth" do
    test "prompts a password for a password-protected link", %{conn: conn} do
      site = insert(:site)

      link =
        insert(:shared_link, site: site, password_hash: Plausible.Auth.Password.hash("password"))

      conn = get(conn, "/share/#{site.domain}?auth=#{link.slug}")
      assert response(conn, 200) =~ "Enter password"
    end

    test "logs anonymous user in straight away if the link is not password-protected", %{
      conn: conn
    } do
      site = insert(:site, domain: "test-site.com")
      link = insert(:shared_link, site: site)

      conn = get(conn, "/share/test-site.com/?auth=#{link.slug}")
      assert html_response(conn, 200) =~ "stats-react-container"
    end

    test "returns page with X-Frame-Options disabled so it can be embedded in an iframe", %{
      conn: conn
    } do
      site = insert(:site, domain: "test-site.com")
      link = insert(:shared_link, site: site)

      conn = get(conn, "/share/test-site.com/?auth=#{link.slug}")
      assert Plug.Conn.get_resp_header(conn, "x-frame-options") == []
    end

    test "shows locked page if page is locked", %{conn: conn} do
      site = insert(:site, domain: "test-site.com", locked: true)
      link = insert(:shared_link, site: site)

      conn = get(conn, "/share/test-site.com/?auth=#{link.slug}")

      assert html_response(conn, 200) =~ "Dashboard locked"
      refute String.contains?(html_response(conn, 200), "Back to my sites")
    end

    test "renders 404 not found when no auth parameter supplied", %{conn: conn} do
      conn = get(conn, "/share/example.com")
      assert response(conn, 404) =~ "nothing here"
    end

    test "renders 404 not found when non-existent auth parameter is supplied", %{conn: conn} do
      conn = get(conn, "/share/example.com?auth=bad-token")
      assert response(conn, 404) =~ "nothing here"
    end

    test "renders 404 not found when auth parameter for another site is supplied", %{conn: conn} do
      site1 = insert(:site, domain: "test-site-1.com")
      site2 = insert(:site, domain: "test-site-2.com")
      site1_link = insert(:shared_link, site: site1)

      conn = get(conn, "/share/#{site2.domain}/?auth=#{site1_link.slug}")
      assert response(conn, 404) =~ "nothing here"
    end
  end

  describe "GET /share/:slug - backwards compatibility" do
    test "it redirects to new shared link format for historical links", %{conn: conn} do
      site = insert(:site, domain: "test-site.com")
      site_link = insert(:shared_link, site: site, inserted_at: ~N[2021-12-31 00:00:00])

      conn = get(conn, "/share/#{site_link.slug}")
      assert redirected_to(conn, 302) == "/share/#{site.domain}?auth=#{site_link.slug}"
    end

    test "it does nothing for newer links", %{conn: conn} do
      site = insert(:site, domain: "test-site.com")
      site_link = insert(:shared_link, site: site, inserted_at: ~N[2022-01-01 00:00:00])

      conn = get(conn, "/share/#{site_link.slug}")
      assert response(conn, 404) =~ "nothing here"
    end
  end

  describe "POST /share/:slug/authenticate" do
    test "logs anonymous user in with correct password", %{conn: conn} do
      site = insert(:site, domain: "test-site.com")

      link =
        insert(:shared_link, site: site, password_hash: Plausible.Auth.Password.hash("password"))

      conn = post(conn, "/share/#{link.slug}/authenticate", %{password: "password"})
      assert redirected_to(conn, 302) == "/share/#{site.domain}?auth=#{link.slug}"

      conn = get(conn, "/share/#{site.domain}?auth=#{link.slug}")
      assert html_response(conn, 200) =~ "stats-react-container"
    end

    test "shows form again with wrong password", %{conn: conn} do
      site = insert(:site, domain: "test-site.com")

      link =
        insert(:shared_link, site: site, password_hash: Plausible.Auth.Password.hash("password"))

      conn = post(conn, "/share/#{link.slug}/authenticate", %{password: "WRONG!"})
      assert html_response(conn, 200) =~ "Enter password"
    end

    test "only gives access to the correct dashboard", %{conn: conn} do
      site = insert(:site, domain: "test-site.com")
      site2 = insert(:site, domain: "test-site2.com")

      link =
        insert(:shared_link, site: site, password_hash: Plausible.Auth.Password.hash("password"))

      link2 =
        insert(:shared_link, site: site2, password_hash: Plausible.Auth.Password.hash("password1"))

      conn = post(conn, "/share/#{link.slug}/authenticate", %{password: "password"})
      assert redirected_to(conn, 302) == "/share/#{site.domain}?auth=#{link.slug}"

      conn = get(conn, "/share/#{site2.domain}?auth=#{link2.slug}")
      assert html_response(conn, 200) =~ "Enter password"
    end
  end
end