require "test_helper"

class SnaptradeItemsControllerTest < ActionDispatch::IntegrationTest
  setup do
    sign_in @user = users(:family_admin)
    @snaptrade_item = snaptrade_items(:configured_item)
  end

  def sign_out
    @user.sessions.each do |session|
      delete session_path(session)
    end
  end

  test "connect handles decryption error gracefully" do
    SnaptradeItem.any_instance
      .stubs(:user_registered?)
      .raises(ActiveRecord::Encryption::Errors::Decryption.new("cannot decrypt"))

    get connect_snaptrade_item_url(@snaptrade_item)

    assert_redirected_to settings_providers_path
    assert_match(/Unable to read SnapTrade credentials/, flash[:alert])
  end

  test "connect handles general error gracefully" do
    SnaptradeItem.any_instance
      .stubs(:user_registered?)
      .raises(StandardError.new("something broke"))

    get connect_snaptrade_item_url(@snaptrade_item)

    assert_redirected_to settings_providers_path
    assert_match(/Failed to connect/, flash[:alert])
  end

  test "connect redirects to portal when successful" do
    portal_url = "https://app.snaptrade.com/portal/test123"

    SnaptradeItem.any_instance.stubs(:user_registered?).returns(true)
    SnaptradeItem.any_instance.stubs(:connection_portal_url).returns(portal_url)

    get connect_snaptrade_item_url(@snaptrade_item)

    assert_redirected_to portal_url
  end

  test "select_accounts redirects unregistered users into connect flow" do
    sign_out
    sign_in @user = users(:empty)
    snaptrade_item = snaptrade_items(:pending_registration_item)

    get select_accounts_snaptrade_items_url, params: { accountable_type: "Investment", return_to: "setup_accounts" }

    assert_redirected_to connect_snaptrade_item_path(snaptrade_item)
  end

  test "callback resumes setup flow after first-time connect detour" do
    sign_out
    sign_in @user = users(:empty)
    snaptrade_item = snaptrade_items(:pending_registration_item)

    assert_difference "Sync.count", 1 do
      get select_accounts_snaptrade_items_url, params: { accountable_type: "Investment", return_to: "setup_accounts" }
      assert_redirected_to connect_snaptrade_item_path(snaptrade_item)

      get callback_snaptrade_items_url, params: { item_id: snaptrade_item.id }
    end

    assert_redirected_to setup_accounts_snaptrade_item_path(snaptrade_item, accountable_type: "Investment")
  end

  test "select_accounts redirects registered users to setup flow" do
    get select_accounts_snaptrade_items_url, params: { accountable_type: "Investment", return_to: "/accounts" }

    assert_redirected_to setup_accounts_snaptrade_item_path(@snaptrade_item, accountable_type: "Investment", return_to: "/accounts")
  end

  test "preload_accounts redirects unregistered users into connect flow" do
    sign_out
    sign_in @user = users(:empty)
    snaptrade_item = snaptrade_items(:pending_registration_item)

    assert_no_difference "Sync.count" do
      get preload_accounts_snaptrade_items_url
    end

    assert_redirected_to connect_snaptrade_item_path(snaptrade_item)
  end

  test "preload_accounts redirects registered users to setup flow and queues sync" do
    assert_difference "Sync.count", 1 do
      get preload_accounts_snaptrade_items_url
    end

    assert_redirected_to setup_accounts_snaptrade_item_path(@snaptrade_item)
  end

  test "entry routing prefers a registered active item over a pending one" do
    pending_item = @user.family.snaptrade_items.create!(
      name: "Pending Registration",
      client_id: "pending_client_id",
      consumer_key: "pending_consumer_key",
      status: :good,
      scheduled_for_deletion: false,
      pending_account_setup: true
    )

    get select_accounts_snaptrade_items_url, params: { accountable_type: "Investment", return_to: "/accounts" }
    assert_redirected_to setup_accounts_snaptrade_item_path(@snaptrade_item, accountable_type: "Investment", return_to: "/accounts")

    assert_difference "Sync.count", 1 do
      get preload_accounts_snaptrade_items_url
    end
    assert_redirected_to setup_accounts_snaptrade_item_path(@snaptrade_item)

    assert_not pending_item.user_registered?
  end

  test "setup_accounts shows linkable investment and crypto accounts in dropdown" do
    get setup_accounts_snaptrade_item_url(@snaptrade_item)

    assert_response :success

    # Investment and crypto accounts (no provider) should appear in the link dropdown
    assert_match accounts(:investment).name, response.body
    assert_match accounts(:crypto).name, response.body

    # Depository should NOT appear in the link dropdown (wrong type)
    # The depository name may appear elsewhere on the page, so check the select options specifically
    refute_match(/option.*#{accounts(:depository).name}/, response.body)
  end

  test "setup_accounts excludes accounts that already have a provider from dropdown" do
    # Link the investment account to a snaptrade_account
    AccountProvider.create!(
      account: accounts(:investment),
      provider: snaptrade_accounts(:fidelity_401k)
    )

    get setup_accounts_snaptrade_item_url(@snaptrade_item)

    assert_response :success

    # Investment account is now linked → should NOT appear in link dropdown options
    refute_match(/option.*#{accounts(:investment).name}/, response.body)
    # Crypto still unlinked → should appear
    assert_match accounts(:crypto).name, response.body
  end

  test "select_existing_account prefers registered active item over pending one" do
    pending_item = @user.family.snaptrade_items.create!(
      name: "Pending Registration",
      client_id: "pending_client_id",
      consumer_key: "pending_consumer_key",
      status: :good,
      scheduled_for_deletion: false,
      pending_account_setup: true
    )
    pending_item.snaptrade_accounts.create!(
      snaptrade_account_id: "pending_snaptrade_account",
      name: "Pending Brokerage Account",
      brokerage_name: "Pending Broker",
      currency: "USD",
      current_balance: 0
    )

    get select_existing_account_snaptrade_items_url, params: { account_id: accounts(:investment).id }

    assert_response :success
    assert_includes response.body, snaptrade_accounts(:fidelity_401k).name
    refute_includes response.body, "Pending Brokerage Account"
  end

  test "link_existing_account links account to snaptrade_account" do
    account = accounts(:investment)
    snaptrade_account = snaptrade_accounts(:fidelity_401k)

    assert_difference "AccountProvider.count", 1 do
      post link_existing_account_snaptrade_items_url, params: {
        account_id: account.id,
        snaptrade_account_id: snaptrade_account.id,
        snaptrade_item_id: @snaptrade_item.id
      }
    end

    assert_redirected_to account_path(account)
    assert_match(/Successfully linked/, flash[:notice])

    snaptrade_account.reload
    assert_equal account, snaptrade_account.current_account
  end

  test "link_existing_account handles missing account gracefully" do
    snaptrade_account = snaptrade_accounts(:fidelity_401k)

    assert_no_difference "AccountProvider.count" do
      post link_existing_account_snaptrade_items_url, params: {
        account_id: "nonexistent",
        snaptrade_account_id: snaptrade_account.id,
        snaptrade_item_id: @snaptrade_item.id
      }
    end

    assert_redirected_to settings_providers_path
    assert_match(/not found/i, flash[:alert])
  end

  # --- setup_accounts throttle-sync fix ---
  #
  # The fix on setup_accounts ensures sync_later is only called when there are no
  # accounts AND the item has never been synced (last_synced_at.blank?).  This
  # prevents the infinite-spinner loop where every page load re-triggered a sync
  # even after SnapTrade already confirmed 0 linked accounts.
  #
  # Three view-state branches we need to cover:
  #   A) No accounts + never synced  → trigger sync, render spinner
  #   B) No accounts + synced once, now idle → skip sync, show "no accounts found"
  #   C) No accounts + synced once, still syncing → show spinner, do NOT re-queue

  test "setup_accounts triggers sync and shows spinner when item has no accounts and has never been synced" do
    # Pre-condition: no snaptrade_accounts and no completed syncs (last_synced_at is nil)
    @snaptrade_item.snaptrade_accounts.destroy_all
    @snaptrade_item.syncs.destroy_all

    assert_difference "Sync.count", 1 do
      get setup_accounts_snaptrade_item_url(@snaptrade_item)
    end

    assert_response :success
    assert_select "#snaptrade-sync-spinner", count: 1, message: "Expected the spinner to be shown on first visit with no accounts"
    assert_select ".no-accounts-found", count: 0, message: "Expected the no-accounts UI to be hidden while syncing"
  end

  test "setup_accounts shows no-accounts-found state after a completed sync returns zero accounts" do
    # Pre-condition: no snaptrade_accounts, but there IS a past completed sync
    @snaptrade_item.snaptrade_accounts.destroy_all
    @snaptrade_item.syncs.destroy_all
    @snaptrade_item.syncs.create!(status: :completed, completed_at: 1.minute.ago)

    # Item is not currently syncing → @syncing is false
    assert_not @snaptrade_item.reload.syncing?, "Item should not be syncing for this test"

    assert_no_difference "Sync.count" do
      get setup_accounts_snaptrade_item_url(@snaptrade_item)
    end

    assert_response :success
    assert_select ".no-accounts-found", count: 1, message: "Expected the no-accounts UI to be shown after a completed sync with zero accounts"
    assert_select "#snaptrade-sync-spinner", count: 0, message: "Expected the spinner to be hidden when there is no active sync"
  end

  test "setup_accounts does not re-queue a sync when a sync is already in progress" do
    # Pre-condition: no accounts, one past completed sync, + one visible (in-flight) sync
    @snaptrade_item.snaptrade_accounts.destroy_all
    @snaptrade_item.syncs.destroy_all
    @snaptrade_item.syncs.create!(status: :completed, completed_at: 5.minutes.ago)
    @snaptrade_item.syncs.create!(status: :pending, created_at: 1.minute.ago)   # visible/in-flight

    assert @snaptrade_item.reload.syncing?, "Item should be syncing for this test"

    assert_no_difference "Sync.count" do
      get setup_accounts_snaptrade_item_url(@snaptrade_item)
    end

    assert_response :success
    assert_select "#snaptrade-sync-spinner", count: 1, message: "Expected the spinner to be shown while sync is in progress"
    assert_select ".no-accounts-found", count: 0, message: "Expected the no-accounts UI to be hidden while a sync is active"
  end
end