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

# Run this in a theme directory while `shopify theme dev` is running
# to verify the debounce is working correctly.
#
# Usage:
#   ruby test_debounce.rb

THEME_LIQUID_PATH = "layout/theme.liquid"
NUM_CHANGES = 25
DELAY_BETWEEN_CHANGES_MS = 100

def main
  unless File.exist?(THEME_LIQUID_PATH)
    puts "Error: #{THEME_LIQUID_PATH} not found."
    puts "Please run this script from the root of a Shopify theme directory."
    exit 1
  end

  original_content = File.read(THEME_LIQUID_PATH)

  # Find the closing </html> tag
  unless original_content.include?("</html>")
    puts "Error: Could not find </html> tag in #{THEME_LIQUID_PATH}"
    exit 1
  end

  puts "=" * 60
  puts "Theme File Watcher Debounce Test"
  puts "=" * 60
  puts ""
  puts "This script will make #{NUM_CHANGES} rapid changes to #{THEME_LIQUID_PATH}"
  puts "with #{DELAY_BETWEEN_CHANGES_MS}ms between each change."
  puts ""
  puts "Watch your `shopify theme dev` output:"
  puts "  - WITHOUT debounce: May see sync issues or file delete warnings"
  puts "  - WITH debounce: Should see calm, stable syncing"
  puts ""
  puts "Press Enter to start (Ctrl+C to cancel)..."
  gets

  words = %w[
    alpha bravo charlie delta echo foxtrot golf hotel india juliet
    kilo lima mike november oscar papa quebec romeo sierra tango
    uniform victor whiskey xray yankee zulu one two three four five
  ]

  puts "Starting rapid file changes..."
  puts ""

  NUM_CHANGES.times do |i|
    word = words[i % words.length]
    marker = "<!-- debounce-test: #{word}-#{i + 1} -->"

    # Replace any existing marker or add before </html>
    new_content = if original_content.include?("<!-- debounce-test:")
      original_content.gsub(/<!-- debounce-test: .+? -->/, marker)
    else
      original_content.gsub("</html>", "#{marker}\n</html>")
    end

    # Update our reference for subsequent iterations
    original_content = new_content if i == 0 && !original_content.include?("<!-- debounce-test:")

    File.write(THEME_LIQUID_PATH, new_content)
    puts "  [#{i + 1}/#{NUM_CHANGES}] Changed marker to: #{word}-#{i + 1}"

    # Update original_content with the new marker for next iteration
    original_content = new_content

    sleep(DELAY_BETWEEN_CHANGES_MS / 1000.0)
  end

  puts ""
  puts "=" * 60
  puts "Test complete!"
  puts "=" * 60
  puts ""
  puts "To clean up, remove the <!-- debounce-test: ... --> comment from"
  puts "#{THEME_LIQUID_PATH} or just revert the file."
end

# Handle Ctrl+C gracefully
trap("INT") do
  puts "\n\nCancelled. Note: #{THEME_LIQUID_PATH} may have been modified."
  puts "Check the file and revert if needed."
  exit 0
end

main