# frozen_string_literal: true

RSpec.describe TTY::Prompt do
  let(:symbols) { TTY::Prompt::Symbols.symbols }

  subject(:prompt) { TTY::Prompt::Test.new }

  def output_helper(prompt, choices, active, options = {})
    enum    = options.fetch(:enum, ")")
    input   = options[:input]
    error   = options[:error]
    default = options.fetch(:default, 1)

    out = []
    out << prompt << " \n"
    out << choices.map.with_index do |c, i|
      name = c.is_a?(Hash) ? c[:name] : c
      disabled = c.is_a?(Hash) ? c[:disabled] : false
      num = (i + 1).to_s + enum
      if disabled
        "\e[31m#{symbols[:cross]}\e[0m #{num} #{name} #{disabled}"
      elsif name == active
        "  \e[32m#{num} #{name}\e[0m"
      else
        "  #{num} #{name}"
      end
    end.join("\n")
    out << "\n"
    choice =  "  Choose 1-#{choices.count} [#{default}]: "
    choice += input.to_s if input
    out << choice
    if error
      out << "\n"
      out << "\e[31m>>\e[0m #{error}"
      out << "\e[A\e[1G\e[#{choice.size}C"
    end
    out << "\e[2K\e[1G\e[1A" * (choices.count + 1)
    out << "\e[2K\e[1G\e[J"
    out.join
  end

  def exit_message(prompt, choice)
    "#{prompt} \e[32m#{choice}\e[0m\n"
  end

  it "raises configuration error when default is higher than number of choices" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]

    expect {
      prompt.enum_select("Select an editor?", choices, default: 100)
    }.to raise_error(TTY::Prompt::ConfigurationError,
                     /default index 100 out of range \(1 - 3\)/)
  end

  it "selects default choice by name" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt.input << "\n"
    prompt.input.rewind

    answer = prompt.enum_select("Select an editor?", choices,
                                default: "/usr/bin/vim.basic")

    expect(answer).to eq("/usr/bin/vim.basic")
  end

  it "raises when default choice name is not found" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]

    expect {
      prompt.enum_select("Select an editor?", choices, default: "unknown")
    }.to raise_error(TTY::Prompt::ConfigurationError,
                     "no choice found for the default name: \"unknown\"")
  end

  it "raises when default name matches a disabled choice" do
    choices = [{name: "/bin/nano", disabled: "unavailable"},
               "/usr/bin/vim.basic", "/usr/bin/vim.tiny"]

    expect {
      prompt.enum_select("Select an editor?", choices, default: "/bin/nano")
    }.to raise_error(TTY::Prompt::ConfigurationError,
                     "default name \"/bin/nano\" matches disabled choice")
  end

  it "selects default option when return pressed immediately" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt.input << "\n"
    prompt.input.rewind

    answer = prompt.enum_select("Select an editor?", choices)
    expect(answer).to eq("/bin/nano")

    expected_output = [
      output_helper("Select an editor?", choices, "/bin/nano"),
      exit_message("Select an editor?", "/bin/nano")
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "selects option by index from the list" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt.input << "3\n"
    prompt.input.rewind

    answer = prompt.enum_select("Select an editor?", choices, default: 2)
    expect(answer).to eq("/usr/bin/vim.tiny")

    expected_output = [
      output_helper("Select an editor?", choices, "/usr/bin/vim.basic", default: 2),
      output_helper("Select an editor?", choices, "/usr/bin/vim.tiny", default: 2, input: "3"),
      exit_message("Select an editor?", "/usr/bin/vim.tiny")
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "selects option through DSL" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt.input << "1\n"
    prompt.input.rewind
    answer = prompt.enum_select("Select an editor?") do |menu|
      menu.default 2
      menu.enum "."

      menu.choice "/bin/nano"
      menu.choice "/usr/bin/vim.basic"
      menu.choice "/usr/bin/vim.tiny"
    end
    expect(answer).to eq("/bin/nano")

    expected_output = [
      output_helper("Select an editor?", choices, "/usr/bin/vim.basic", default: 2, enum: "."),
      output_helper("Select an editor?", choices, "/bin/nano", default: 2, enum: ".", input: 1),
      exit_message("Select an editor?", "/bin/nano")
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "sets choice value to nil through DSL" do
    choices = %w[none /bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt.input << "\n"
    prompt.input.rewind
    answer = prompt.enum_select("Select an editor?") do |menu|
      menu.default 1

      menu.choice "none", nil
      menu.choice "/bin/nano"
      menu.choice "/usr/bin/vim.basic"
      menu.choice "/usr/bin/vim.tiny"
    end
    expect(answer).to eq(nil)

    expected_output = [
      output_helper("Select an editor?", choices, "none", default: 1),
      exit_message("Select an editor?", "none")
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "selects option through DSL with key and value" do
    choices = %w[nano vim emacs]
    prompt.input << "\n"
    prompt.input.rewind

    answer = prompt.enum_select("Select an editor?") do |menu|
      menu.default 2

      menu.choice :nano,  "/bin/nano"
      menu.choice :vim,   "/usr/bin/vim"
      menu.choice :emacs, "/usr/bin/emacs"
    end

    expect(answer).to eq("/usr/bin/vim")

    expected_output = [
      output_helper("Select an editor?", choices, "vim", default: 2),
      exit_message("Select an editor?", "vim")
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "changes colors for selection, hint and error" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt.input << "\n"
    prompt.input.rewind
    options = {active_color: :red, help_color: :blue, error_color: :green}

    answer = prompt.enum_select("Select an editor?", choices, options)

    expect(answer).to eq("/bin/nano")

    expected_output = [
      "Select an editor? \n",
      "  \e[31m1) /bin/nano\e[0m\n",
      "  2) /usr/bin/vim.basic\n",
      "  3) /usr/bin/vim.tiny\n",
      "  Choose 1-3 [1]: ",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "Select an editor? \e[31m/bin/nano\e[0m\n"
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "changes global symbols" do
    prompt = TTY::Prompt::Test.new(symbols: {cross: "x"})
    choices = ["A", {name: "B", disabled: "(out)"}, "C"]
    prompt.input << "\n"
    prompt.input.rewind
    answer = prompt.enum_select("What letter?", choices)
    expect(answer).to eq("A")

    expected_output = [
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "\e[31mx\e[0m 2) B (out)\n",
      "  3) C\n",
      "  Choose 1-3 [1]: ",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \e[32mA\e[0m\n"
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "changes global symbols through DSL" do
    choices = ["A", {name: "B", disabled: "(out)"}, "C"]
    prompt.input << "\n"
    prompt.input.rewind
    answer = prompt.enum_select("What letter?") do |menu|
               menu.symbols cross: "x"
               menu.choices choices
             end
    expect(answer).to eq("A")

    expected_output = [
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "\e[31mx\e[0m 2) B (out)\n",
      "  3) C\n",
      "  Choose 1-3 [1]: ",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \e[32mA\e[0m\n"
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "sets quiet mode" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt = TTY::Prompt::Test.new(quiet: true)
    prompt.input << "\n"
    prompt.input.rewind

    answer = prompt.enum_select("Select an editor?", choices)
    expect(answer).to eq("/bin/nano")

    expected_output =
      output_helper("Select an editor?", choices, "/bin/nano")

    expect(prompt.output.string).to eq(expected_output)
  end

  it "sets quiet mode through DSL" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt.input << "1\n"
    prompt.input.rewind
    answer = prompt.enum_select("Select an editor?") do |menu|
      menu.quiet true
      menu.default 2
      menu.enum "."

      menu.choice "/bin/nano"
      menu.choice "/usr/bin/vim.basic"
      menu.choice "/usr/bin/vim.tiny"
    end
    expect(answer).to eq("/bin/nano")

    expected_output =
      output_helper("Select an editor?", choices, "/usr/bin/vim.basic", default: 2, enum: ".") +
      output_helper("Select an editor?", choices, "/bin/nano", default: 2, enum: ".", input: 1)

    expect(prompt.output.string).to eq(expected_output)
  end

  it "displays error with unrecognized input" do
    choices = %w[/bin/nano /usr/bin/vim.basic /usr/bin/vim.tiny]
    prompt.input << "11\n2\n"
    prompt.input.rewind

    answer = prompt.enum_select("Select an editor?", choices)
    expect(answer).to eq("/usr/bin/vim.basic")

    expected_output = [
      output_helper("Select an editor?", choices, "/bin/nano"),
      output_helper("Select an editor?", choices, "/bin/nano", input: "1"),
      output_helper("Select an editor?", choices, "/bin/nano", input: "11"),
      output_helper("Select an editor?", choices, "/bin/nano", error: "Please enter a valid number", input: ""),
      output_helper("Select an editor?", choices, "/usr/bin/vim.basic", error: "Please enter a valid number", input: "2"),
      exit_message("Select an editor?", "/usr/bin/vim.basic")
    ].join

    expect(prompt.output.string).to eq(expected_output)
  end

  it "paginates long selections" do
    choices = %w[A B C D E F G H]
    prompt.input << "\n"
    prompt.input.rewind

    answer = prompt.enum_select("What letter?", choices, per_page: 3, default: 4)
    expect(answer).to eq("D")

    expect(prompt.output.string).to eq([
      "What letter? \n",
      "  \e[32m4) D\e[0m\n",
      "  5) E\n",
      "  6) F\n",
      "  Choose 1-8 [4]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \e[32mD\e[0m\n"
    ].join)
  end

  it "doesn't paginate short selections" do
    choices = %i[A B C D]
    prompt.input << "\r"
    prompt.input.rewind

    answer = prompt.enum_select("What letter?", choices, per_page: 4, default: 1)
    expect(answer).to eq(:A)

    expected_output =
      output_helper("What letter?", choices, :A) +
      exit_message("What letter?", :A)

    expect(prompt.output.string).to eq(expected_output)
  end

  it "shows pages matching input" do
    choices = %w[A B C D E F G H]
    prompt.input << "11\n\b\n"
    prompt.input.rewind
    value = prompt.enum_select("What letter?", choices, per_page: 3)
    expect(value).to eq("A")
    expect(prompt.output.string).to eq([
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "  2) B\n",
      "  3) C\n",
      "  Choose 1-8 [1]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "  2) B\n",
      "  3) C\n",
      "  Choose 1-8 [1]: 1",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[19C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "  2) B\n",
      "  3) C\n",
      "  Choose 1-8 [1]: 11",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[20C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "  2) B\n",
      "  3) C\n",
      "  Choose 1-8 [1]: \n",
      "\e[31m>>\e[0m Please enter a valid number",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "  2) B\n",
      "  3) C\n",
      "  Choose 1-8 [1]: \n",
      "\e[31m>>\e[0m Please enter a valid number",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \e[32mA\e[0m\n"
    ].join)
  end

  it "switches through pages with tab key" do
    choices = %w[A B C D E F G H]
    prompt.input << "\t\n"
    prompt.input.rewind
    value = prompt.enum_select("What letter?") do |menu|
              menu.default 4
              menu.per_page 3
              menu.choices choices
            end
    expect(value).to eq("D")
    expect(prompt.output.string).to eq([
      "What letter? \n",
      "  \e[32m4) D\e[0m\n",
      "  5) E\n",
      "  6) F\n",
      "  Choose 1-8 [4]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  7) G\n",
      "  8) H\n",
      "  Choose 1-8 [4]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 3,
      "\e[2K\e[1G\e[J",
      "What letter? \e[32mD\e[0m\n"
    ].join)
  end

  it "doesn't cycle around by default" do
    choices = %w[A B C D E F]
    prompt.input << "\t" << "\t" << "\n"
    prompt.input.rewind
    value = prompt.enum_select("What letter?") do |menu|
              menu.default 1
              menu.per_page 3
              menu.choices choices
            end
    expect(value).to eq("A")
    expect(prompt.output.string).to eq([
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "  2) B\n",
      "  3) C\n",
      "  Choose 1-6 [1]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  4) D\n",
      "  5) E\n",
      "  6) F\n",
      "  Choose 1-6 [1]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  4) D\n",
      "  5) E\n",
      "  6) F\n",
      "  Choose 1-6 [1]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \e[32mA\e[0m\n"
    ].join)
  end

  it "cycles around when configured to do so" do
    choices = %w[A B C D E F]
    prompt.input << "\t" << "\t" << "\n"
    prompt.input.rewind
    value = prompt.enum_select("What letter?", cycle: true) do |menu|
              menu.default 1
              menu.per_page 3
              menu.choices choices
            end
    expect(value).to eq("A")

    expect(prompt.output.string).to eq([
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "  2) B\n",
      "  3) C\n",
      "  Choose 1-6 [1]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  4) D\n",
      "  5) E\n",
      "  6) F\n",
      "  Choose 1-6 [1]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \n",
      "  \e[32m1) A\e[0m\n",
      "  2) B\n",
      "  3) C\n",
      "  Choose 1-6 [1]: ",
      "\n\e[90m(Press tab/right or left to reveal more choices)\e[0m",
      "\e[A\e[1G\e[18C",
      "\e[2K\e[1G\e[1A" * 4,
      "\e[2K\e[1G\e[J",
      "What letter? \e[32mA\e[0m\n"
    ].join)
  end

  context "with :disabled choice" do
    it "fails when active item is also disabled" do
      choices = [{name: "A", disabled: true}, "B", "C", "D", "E"]
      expect {
        prompt.enum_select("What letter?", choices, default: 1)
      }.to raise_error(TTY::Prompt::ConfigurationError,
        /default index 1 matches disabled choice item/)
    end

    it "finds first non-disabled index" do
      choices = [{name: "A", disabled: true}, {name: "B", disabled: true}, "C", "D"]
      prompt.input << "\n"
      prompt.input.rewind

      answer = prompt.enum_select("What letter?", choices)
      expect(answer).to eq("C")
    end

    it "doesn't allow to choose disabled choice and defaults" do
      choices = ["A", {name: "B", disabled: "(out)"}, "C", "D", "E", "F"]
      prompt.input << "2" << "\n" << "3" << "\n"
      prompt.input.rewind

      answer = prompt.enum_select("What letter?", choices)
      expect(answer).to eq("C")

      expected_output = [
        output_helper("What letter?", choices, "A"),
        output_helper("What letter?", choices, "A", input: "2"),
        output_helper("What letter?", choices, "A", input: "", error: "Please enter a valid number"),
        output_helper("What letter?", choices, "C", input: "3", error: "Please enter a valid number"),
        exit_message("What letter?", "C")
      ].join

      expect(prompt.output.string).to eq(expected_output)
    end

    it "omits disabled choice when navigating with numbers" do
      choices = [
        {name: "A"},
        {name: "B", disabled: "(out)"},
        {name: "C", disabled: "(out)"},
        {name: "D"},
        {name: "E"}
      ]
      prompt.on(:keypress) { |e| prompt.trigger(:keydelete) if e.value == "B" }
      prompt.input << "2" << "\u007F" << "3" << "\u007F" << "4" << "\n"
      prompt.input.rewind

      answer = prompt.enum_select("What letter?", choices)
      expect(answer).to eq("D")

      expected_output = [
        output_helper("What letter?", choices, "A"),
        output_helper("What letter?", choices, "A", input: "2"),
        output_helper("What letter?", choices, "A", input: ""),
        output_helper("What letter?", choices, "A", input: "3"),
        output_helper("What letter?", choices, "A", input: ""),
        output_helper("What letter?", choices, "D", input: "4"),
        exit_message("What letter?", "D")
      ].join

      expect(prompt.output.string).to eq(expected_output)
    end
  end
end