#!/usr/bin/env ruby
# frozen_string_literal: true

require 'simple_scripting/configuration'
require_relative '../lib/geet/commandline/configuration'
require_relative '../lib/geet/commandline/commands'
require_relative '../lib/geet/commandline/editor'
require_relative '../lib/geet/git/repository'
require_relative '../lib/geet/helpers/summary_helper'
require_relative '../lib/geet/shared/selection'
require_relative '../lib/geet/utils/git_client'
Dir[File.join(__dir__, '../lib/geet/services/*.rb')].each { |filename| require filename }

class GeetLauncher
  include Geet
  include Geet::Commandline::Commands
  include Geet::Helpers::SummaryHelper

  SUMMARY_TEMPLATE = IO.read(File.expand_path('../lib/geet/resources/templates/edit_summary.md', __dir__))

  def launch
    command, options = Commandline::Configuration.new.decode_argv || exit

    repository = Git::Repository.new(upstream: !!options[:upstream], protected_repositories: protected_repositories)

    case command
    when GIST_CREATE_COMMAND
      filename = options.delete(:filename)
      options[:publik] = options.delete(:public) if options.key?(:public)

      Services::CreateGist.new.execute(filename, options)
    when ISSUE_CREATE_COMMAND
      summary = options[:summary] || Commandline::Editor.new.edit_content(help: SUMMARY_TEMPLATE)
      title, description = split_summary(summary)

      options = default_to_manual_selection(options, :labels, :milestone, :assignees)

      Services::CreateIssue.new(repository).execute(title, description, options)
    when LABEL_CREATE_COMMAND
      name = options.delete(:name)

      Services::CreateLabel.new(repository).execute(name, options)
    when ISSUE_LIST_COMMAND
      options = default_to_manual_selection(options, :assignee)

      Services::ListIssues.new(repository).execute(options)
    when LABEL_LIST_COMMAND
      Services::ListLabels.new(repository).execute
    when MILESTONE_LIST_COMMAND
      Services::ListMilestones.new(repository).execute
    when PR_CREATE_COMMAND
      summary = options[:summary] || edit_pr_summary
      title, description = split_summary(summary)

      options = default_to_manual_selection(options, :labels, :milestone, :reviewers)

      Services::CreatePr.new(repository).execute(title, description, options)
    when PR_LIST_COMMAND
      Services::ListPrs.new(repository).execute
    when PR_MERGE_COMMAND
      Services::MergePr.new(repository).execute(options)
    else
      raise "Internal error - Unrecognized command #{command.inspect}"
    end
  end

  private

  def edit_pr_summary
    # Tricky. It would be best to have Git logic exlusively inside the services,
    # but at the same time, the summary editing should be out.
    git = Utils::GitClient.new
    pr_commits = git.cherry('master')

    if pr_commits.size == 1
      prepopulated_summary = git.show_description('HEAD')
      cancel_pr_help = "In order to cancel the PR creation, delete the description above.\n"

      Commandline::Editor.new.edit_content(content: prepopulated_summary, help: SUMMARY_TEMPLATE + cancel_pr_help)
    else
      Commandline::Editor.new.edit_content(help: SUMMARY_TEMPLATE)
    end
  end

  def default_to_manual_selection(options, *params)
    params.each do |param|
      options[param] ||= Shared::Selection::MANUAL_LIST_SELECTION_FLAG
    end

    options
  end

  def protected_repositories
    configuration = SimpleScripting::Configuration.load

    configuration.protected_repositories.to_s.split(':')
  end
end

GeetLauncher.new.launch if $PROGRAM_NAME == __FILE__