# 
# ** FILE CHECKS **
# Checks for certain rules and warns if needed.
# Some rules can be disabled by using // danger:disable rule_name
# 
# Rules:
# - Check if the modified file is a View and doesn't implement LifetimeTrackable (lifetime_tracking)

# Sometimes an added file is also counted as modified. We want the files to be checked only once. 
files_to_check = (git.modified_files + git.added_files).uniq
(files_to_check - %w(Dangerfile)).each do |file|
	next unless File.file?(file)
	# Only check inside swift files
  next unless File.extname(file).include?(".swift")
    	
  # Will be used to check if we're inside a comment block.
	is_comment_block = false

	# Collects all disabled rules for this file.
	disabled_rules = []

	filelines = File.readlines(file)
	filelines.each_with_index do |line, index|
		if is_comment_block
			if line.include?("*/")
				is_comment_block = false
			end
		elsif line.include?("/*")
			is_comment_block = true
		elsif line.include?("danger:disable")
			rule_to_disable = line.split.last
			disabled_rules.push(rule_to_disable)
		else
			# Start our custom line checks
			# e.g. you could do something like check for methods that only call the super class' method
			#if line.include?("override") and line.include?("func") and filelines[index+1].include?("super") and filelines[index+2].include?("}")
			#	warn("Override methods which only call super can be removed", file: file, line: index+3) 
			#end
    end
	end
	
	# Only continue checks for Lifetime Trackable types
	next unless (File.basename(file).include?("ViewModel") or File.basename(file).include?("ViewController") or File.basename(file).include?("View.swift")) and !File.basename(file).include?("Node") and !File.basename(file).include?("Tests") and !File.basename(file).include?("FlowCoordinator")

	if disabled_rules.include?("lifetime_tracking") == false 
		if File.readlines(file).grep(/LifetimeTrackable/).any? 
			fail("You forgot to call trackLifetime() from your initializers in " + File.basename(file, ".*") + " (lifetime_tracking)") unless File.readlines(file).grep(/trackLifetime()/).any? 
		else
			warn("Please add support for LifetimeTrackable to " + File.basename(file, ".*") + " . (lifetime_tracking)")
		end
		markdown("- [ ] I've verified that showing and hiding " + File.basename(file, ".*") + " doesn't surface any [LifetimeTracker](https://github.com/krzysztofzablocki/LifetimeTracker) issues")
	end

end