# frozen_string_literal: true

module Bundler
  class SourceMap
    attr_reader :sources, :dependencies, :locked_specs

    def initialize(sources, dependencies, locked_specs)
      @sources = sources
      @dependencies = dependencies
      @locked_specs = locked_specs
    end

    def pinned_spec_names(skip = nil)
      direct_requirements.reject {|_, source| source == skip }.keys
    end

    def all_requirements
      requirements = direct_requirements.dup

      unmet_deps = sources.non_default_explicit_sources.map do |source|
        (source.spec_names - pinned_spec_names).each do |indirect_dependency_name|
          previous_source = requirements[indirect_dependency_name]
          if previous_source.nil?
            requirements[indirect_dependency_name] = source
          else
            msg = ["The gem '#{indirect_dependency_name}' was found in multiple relevant sources."]
            msg.concat [previous_source, source].map {|s| "  * #{s}" }.sort
            msg << "You must add this gem to the source block for the source you wish it to be installed from."
            msg = msg.join("\n")

            raise SecurityError, msg
          end
        end

        source.unmet_deps
      end

      sources.default_source.add_dependency_names(unmet_deps.flatten - requirements.keys)

      requirements
    end

    def direct_requirements
      @direct_requirements ||= begin
        requirements = {}
        default = sources.default_source
        dependencies.each do |dep|
          dep_source = dep.source || default
          dep_source.add_dependency_names(dep.name)
          requirements[dep.name] = dep_source
        end
        requirements
      end
    end

    def locked_requirements
      @locked_requirements ||= begin
        requirements = {}
        locked_specs.each do |locked_spec|
          source = locked_spec.source
          source.add_dependency_names(locked_spec.name)
          requirements[locked_spec.name] = source
        end
        requirements
      end
    end
  end
end
