defmodule Mix.Tasks.Excessibility.Latest do
  @shortdoc "Display the most recent debug report"

  @moduledoc """
  Display the most recent debug report without re-running tests.

  ## Usage

      mix excessibility.latest
      mix excessibility.latest --format=json

  ## Description

  Re-displays the last debug report generated by `mix excessibility.debug`.
  Useful for:
  - Returning to a debug session after doing something else
  - Sharing debug output with Claude without re-running tests
  - Comparing multiple runs

  ## Formats

  - `markdown` (default) - Display the markdown report
  - `json` - Display the JSON report
  """

  use Mix.Task

  @impl Mix.Task
  def run(args) do
    {opts, _, _} =
      OptionParser.parse(args,
        strict: [format: :string],
        aliases: [f: :format]
      )

    format = Keyword.get(opts, :format, "markdown")

    output_path =
      Application.get_env(
        :excessibility,
        :excessibility_output_path,
        "test/excessibility"
      )

    file_path =
      case format do
        "json" -> Path.join(output_path, "latest_debug.json")
        _ -> Path.join(output_path, "latest_debug.md")
      end

    if File.exists?(file_path) do
      content = File.read!(file_path)
      Mix.shell().info(content)
    else
      Mix.shell().error("No previous debug report found at #{file_path}")
      Mix.shell().info("Run `mix excessibility.debug test/path_test.exs` first.")
      exit({:shutdown, 1})
    end
  end
end