# frozen_string_literal: true

require "set"

module Bundler
  class SourceList
    attr_reader :path_sources,
      :git_sources,
      :plugin_sources,
      :global_rubygems_source,
      :metadata_source

    def initialize
      @path_sources           = []
      @git_sources            = []
      @plugin_sources         = []
      @global_rubygems_source = nil
      @rubygems_aggregate     = rubygems_aggregate_class.new
      @rubygems_sources       = []
      @metadata_source        = Source::Metadata.new
    end

    def add_path_source(options = {})
      if options["gemspec"]
        add_source_to_list Source::Gemspec.new(options), path_sources
      else
        add_source_to_list Source::Path.new(options), path_sources
      end
    end

    def add_git_source(options = {})
      add_source_to_list(Source::Git.new(options), git_sources).tap do |source|
        warn_on_git_protocol(source)
      end
    end

    def add_rubygems_source(options = {})
      add_source_to_list Source::Rubygems.new(options), @rubygems_sources
    end

    def add_plugin_source(source, options = {})
      add_source_to_list Plugin.source(source).new(options), @plugin_sources
    end

    def global_rubygems_source=(uri)
      if Bundler.feature_flag.disable_multisource?
        @global_rubygems_source ||= rubygems_aggregate_class.new("remotes" => uri)
      end
      add_rubygems_remote(uri)
    end

    def add_rubygems_remote(uri)
      return if Bundler.feature_flag.disable_multisource?
      @rubygems_aggregate.add_remote(uri)
      @rubygems_aggregate
    end

    def default_source
      global_rubygems_source || @rubygems_aggregate
    end

    def rubygems_sources
      @rubygems_sources + [default_source]
    end

    def rubygems_remotes
      rubygems_sources.map(&:remotes).flatten.uniq
    end

    def all_sources
      path_sources + git_sources + plugin_sources + rubygems_sources + [metadata_source]
    end

    def get(source)
      source_list_for(source).find {|s| equal_source?(source, s) || equivalent_source?(source, s) }
    end

    def lock_sources
      lock_sources = (path_sources + git_sources + plugin_sources).sort_by(&:to_s)
      if Bundler.feature_flag.disable_multisource?
        lock_sources + rubygems_sources.sort_by(&:to_s)
      else
        lock_sources << combine_rubygems_sources
      end
    end

    # Returns true if there are changes
    def replace_sources!(replacement_sources)
      return true if replacement_sources.empty?

      [path_sources, git_sources, plugin_sources].each do |source_list|
        source_list.map! do |source|
          replacement_sources.find {|s| s == source } || source
        end
      end

      replacement_rubygems = !Bundler.feature_flag.disable_multisource? &&
        replacement_sources.detect {|s| s.is_a?(Source::Rubygems) }
      @rubygems_aggregate = replacement_rubygems if replacement_rubygems

      return true if !equal_sources?(lock_sources, replacement_sources) && !equivalent_sources?(lock_sources, replacement_sources)
      return true if replacement_rubygems && rubygems_remotes.to_set != replacement_rubygems.remotes.to_set

      false
    end

    def cached!
      all_sources.each(&:cached!)
    end

    def remote!
      all_sources.each(&:remote!)
    end

    def rubygems_primary_remotes
      @rubygems_aggregate.remotes
    end

  private

    def rubygems_aggregate_class
      Source::Rubygems
    end

    def add_source_to_list(source, list)
      list.unshift(source).uniq!
      source
    end

    def source_list_for(source)
      case source
      when Source::Git          then git_sources
      when Source::Path         then path_sources
      when Source::Rubygems     then rubygems_sources
      when Plugin::API::Source  then plugin_sources
      else raise ArgumentError, "Invalid source: #{source.inspect}"
      end
    end

    def combine_rubygems_sources
      Source::Rubygems.new("remotes" => rubygems_remotes)
    end

    def warn_on_git_protocol(source)
      return if Bundler.settings["git.allow_insecure"]

      if source.uri =~ /^git\:/
        Bundler.ui.warn "The git source `#{source.uri}` uses the `git` protocol, " \
          "which transmits data without encryption. Disable this warning with " \
          "`bundle config set git.allow_insecure true`, or switch to the `https` " \
          "protocol to keep your data secure."
      end
    end

    def equal_sources?(lock_sources, replacement_sources)
      lock_sources.to_set == replacement_sources.to_set
    end

    def equal_source?(source, other_source)
      source == other_source
    end

    def equivalent_source?(source, other_source)
      return false unless Bundler.settings[:allow_deployment_source_credential_changes] && source.is_a?(Source::Rubygems)

      equivalent_rubygems_sources?([source], [other_source])
    end

    def equivalent_sources?(lock_sources, replacement_sources)
      return false unless Bundler.settings[:allow_deployment_source_credential_changes]

      lock_rubygems_sources, lock_other_sources = lock_sources.partition {|s| s.is_a?(Source::Rubygems) }
      replacement_rubygems_sources, replacement_other_sources = replacement_sources.partition {|s| s.is_a?(Source::Rubygems) }

      equivalent_rubygems_sources?(lock_rubygems_sources, replacement_rubygems_sources) && equal_sources?(lock_other_sources, replacement_other_sources)
    end

    def equivalent_rubygems_sources?(lock_sources, replacement_sources)
      actual_remotes = replacement_sources.map(&:remotes).flatten.uniq
      lock_sources.all? {|s| s.equivalent_remotes?(actual_remotes) }
    end
  end
end