#!/usr/bin/env ruby

# frozen_string_literal: true

# This script uses the glab cli to check if any of your local branches have
# been merged and then deletes any that have.
#
# This needs the glab cli to function
# https://gitlab.com/gitlab-org/cli/#installation

require 'json'
require 'rainbow/refinement'
using Rainbow

if `git rev-parse --abbrev-ref HEAD`.strip != 'master'
  puts 'Please checkout the '.white + 'master'.blue + ' branch before continuing'.white
  exit
end

branches = `git branch --format='%(refname:short)'`.split("\n").filter_map do |b|
  stripped = b.strip
  stripped unless stripped.empty? || stripped == 'master'
end

deleted = 0

branches.each do |branch|
  puts 'Checking 👀:'.white + " #{branch}".blue

  output = `glab mr list -s #{branch} -F=json -M 2>/dev/null`
  if $?.exitstatus != 0
    puts 'API Error:'.red + " #{output.inspect}".white
    next
  end

  begin
    result = JSON.parse(output)

    if result.empty?
      puts 'Skipping ⛔️:'.white + " #{branch}".green
      next
    end

    `git branch -D #{branch} 2>&1`

    if $?.exitstatus == 0
      puts 'Deleting ✅:'.white + " #{branch}".red
      deleted += 1
    end
  rescue JSON::ParserError
    puts "Warning: Failed to parse JSON for branch '#{branch}'"
    next
  end
end

puts ('-' * 80).white
puts 'Deleted '.blue + deleted.to_s.red + " branch#{'es' unless deleted == 1}".blue
puts ('-' * 80).white