module Jxedt
    class BinarySandbox
        attr_accessor :standard_sandbox

        def initialize(path=nil)
            @sandbox_path = path
        end
    
        def self.from_sandbox(sandbox)
            search_path = Jxedt.config.binary_dir
            binary_dir = search_path.empty? ? nil : sandbox.standard_sandbox_root + search_path
            binary_sandbox = BinarySandbox.new(binary_dir)
            binary_sandbox.standard_sandbox = sandbox
            binary_sandbox
        end

        def binary_dir
            @binary_dir ||= Pathname.new(@sandbox_path)
        end

        def target_paths
            return [] if @sandbox_path.nil?
            return [] unless binary_dir.exist?
            return [] if @standard_sandbox.source_lockfile.nil?
            @targets ||= begin
                prebuild_targets = binary_dir.children().map do |target_path|
                    if target_path.directory? && (not target_path.children.empty?)
                        hash_key = @standard_sandbox.source_lockfile.spec_checksums_hash_key(target_path.basename.to_s)
                        next if hash_key.nil?
                        
                        checksum_files = target_path.children().select { |path| path.extname == '.checksum' }
                        checksum_exists = (target_path + "#{hash_key}.checksum").exist?
                        target_path if checksum_files.count == 1 && checksum_exists
                    end
                end.reject(&:nil?).uniq
                prebuild_targets
            end
            @targets
        end

        def existed_target_names(name)
            target_paths.select { |pair| "#{pair.basename}" == "#{name}" }.map { |pair| pair.basename }
        end

        def framework_folder_path_for_target_name(name)
            target_paths.select { |pair| pair.basename == name }.last
        end

        def prebuild_vendored_frameworks(name)
            target_path = target_paths.select { |pair| "#{pair.basename}" == "#{name}" }.last
            return [] if target_path.nil?

            configuration_enable = target_path.children().select { |path| "#{path.basename}" == 'Debug' || "#{path.basename}" == 'Release' }.count == 2
            if configuration_enable
                xcconfig_configuration_alias = Jxedt.config.xcconfig_configuration_alias
                ["#{xcconfig_configuration_alias}-Release/*.{framework,xcframework}"]
            else
                ["*.{framework,xcframework}"]
            end
        end

        def prebuild_bundles(name)
            target_path = target_paths.select { |pair| "#{pair.basename}" == "#{name}" }.last
            return [] if target_path.nil?

            configuration_enable = target_path.children().select { |path| "#{path.basename}" == 'Debug' || "#{path.basename}" == 'Release' }.count == 2
            if configuration_enable
                xcconfig_configuration_alias = Jxedt.config.xcconfig_configuration_alias
                ["#{xcconfig_configuration_alias}-Release/*.bundle"]
            else
                ["*.bundle"]
            end
        end
    end

    class Prebuild
        def initialize(source_installer)
            @source_installer = source_installer
        end

        def targets_to_prebuild
            explicit_prebuild_pod_names = @source_installer.aggregate_targets.flat_map { |target| 
                target.target_definition.explicit_prebuild_pod_names
            }.uniq

            reject_prebuild_pod_names = @source_installer.aggregate_targets.flat_map { |target| 
                target.target_definition.reject_prebuild_pod_names 
            }.uniq
            
            targets = all_supports_targets.select { |target|
                next if reject_prebuild_pod_names.include?(target.pod_name)
                explicit_prebuild_pod_names.include?(target.pod_name) || Jxedt.config.all_binary_enabled?
            }
            targets
        end

        def all_supports_targets
            targets = @source_installer.pod_targets.select { |target|
                # 排除不需要编译
                next unless target.should_build?
                # 排除target name和pod name不一致的（有两种情况）
                # 1. 同一个pod，在两个target下使用了不同的subspec
                # 2. 同一个pod，在两个不同ios版本的target种引用
                next unless target.name == target.pod_name
                true
            }
            # 排除本地pod
            targets.reject! { |target| @source_installer.sandbox.local?(target.pod_name) } unless Jxedt.config.dev_pods_enabled?
            # 配置中排除的pods
            targets.reject! { |target| Jxedt.config.excluded_pods.include?(target.pod_name) }
            # target中可能存在需要编译的resource文件
            Jxedt.config.disable_resource_compilable_pods? && targets.reject! { |target|
               # 因为编译library静态库会把需要编译的文件拷贝到宿主工程编译，后面我们要把静态库组装成framework，所以需要过滤掉
               resource_extension_compilable = false
               target.resource_paths.each {|name, resources|
                   resources.each {|resource_file|
                       resource_extname = Pathname.new(resource_file).basename.extname
                       resource_extension_compilable = target.class.resource_extension_compilable?(resource_extname)
                       break if resource_extension_compilable
                   }
                   break if resource_extension_compilable
               }
               resource_extension_compilable
            }
            targets
        end

        def build
            binary_sandbox = Jxedt::BinarySandbox.from_sandbox(@source_installer.sandbox)
            existed_target_names = binary_sandbox.target_paths.map { |pair| pair.basename.to_s }
            targets = targets_to_prebuild.reject { |target| existed_target_names.include?(target.name.to_s) }

            Pod::UI.puts "Prebuild total count: #{targets.size}"
            Pod::UI.puts "Prebuild targets: #{ targets.map(&:name)}"
            return [] if targets.empty?

            require_relative 'pod-room/xcodebuild_command'

            clear_output_path
            case targets[0].platform.name
            when :ios, :tvos, :watchos
                Jxedt.config.support_configurations.each do |configuration|
                    Pod::UI.puts "Prebuild configuration: #{configuration}"
                    options = make_options
                    options[:configuration] = configuration
                    options[:targets] = targets
                    options[:output_path] = output_path + configuration
                    Jxedt::XcodebuildCommand.new(options).run
                end
            when :osx
                Jxedt.config.support_configurations.each do |configuration|
                    Pod::UI.puts "Prebuild configuration: #{configuration}"
                    options = make_options
                    xcodebuild(
                        sandbox: options[:sandbox],
                        targets: targets,
                        configuration: configuration,
                        sdk: "macosx",
                        args: options[:args]
                    )
                end
            else
                raise "Unsupported platform for '#{targets[0].name}': '#{targets[0].platform.name}'"
            end

            make_prebuild(targets)
            clear_output_path

            targets.map(&:pod_name).to_a
        end

        def build_targets(names: nil, binary_output: nil)
            targets = all_supports_targets
            targets.select! { |target| names.include?(target.pod_name) } if names && names.is_a?(Array) && names.size > 0

            Pod::UI.puts "Prebuild total count: #{targets.size}"
            Pod::UI.puts "Prebuild targets: #{ targets.map(&:name)}"
            return [] if targets.empty?

            require_relative 'pod-room/xcodebuild_command'

            clear_output_path
            case targets[0].platform.name
            when :ios, :tvos, :watchos
                Jxedt.config.support_configurations.each do |configuration|
                    Pod::UI.puts "Prebuild configuration: #{configuration}"
                    options = make_options
                    options[:configuration] = configuration
                    options[:targets] = targets
                    options[:output_path] = output_path + configuration
                    Jxedt::XcodebuildCommand.new(options).run
                end
            when :osx
                Jxedt.config.support_configurations.each do |configuration|
                    Pod::UI.puts "Prebuild configuration: #{configuration}"
                    options = make_options
                    xcodebuild(
                        sandbox: options[:sandbox],
                        targets: targets,
                        configuration: configuration,
                        sdk: "macosx",
                        clean_build: Jxedt.config.clean_build?,
                        args: options[:args]
                    )
                end
            else
                raise "Unsupported platform for '#{targets[0].name}': '#{targets[0].platform.name}'"
            end
            
            binary_output = Pathname.new(binary_output)
            make_prebuild(targets, binary_output)
            clear_output_path

            targets.map(&:pod_name).to_a
        end

        def make_prebuild(targets, binary_output=nil)
            lockfile = @source_installer.lockfile
            checksums = lockfile.internal_data["SPEC CHECKSUMS"] || {}
            checkout_options = lockfile.internal_data["CHECKOUT OPTIONS"] || {}
            
            # 目标binary路径
            binary_path = output_path.parent
            binary_path = binary_output if binary_output && binary_output.parent.exist?
            prebuild_targets = targets.map(&:name).to_a
            prebuild_targets.map {|target_name| 
                target_path = binary_path + target_name
                target_path.rmtree if target_path.exist?
            }

            # make prebuild files
            configurations = Jxedt.config.support_configurations
            Jxedt.config.support_configurations.each do |configuration|
                configuration_path = output_path + configuration
                next unless configuration_path.exist?
                
                configuration_path.children().each do |child|
                    if child.directory? and (not child.children.empty?)
                        name = child.basename.to_s
                        next unless prebuild_targets.include?(name)

                        target_path = binary_path + name
                        target_path += configuration if configurations.size > 1
                        target_path.mkpath unless target_path.exist?
                        command = "cp -r #{child}/ #{target_path}"
                        `#{command}`
                        
                        # touch checksum
                        checksum = nil
                        checksum = checkout_options[name][:commit] unless checkout_options[name].nil? # commitid有值则使用commitid
                        checksum = checksums[name] if checksum.nil?
                        `echo #{command} "\n" >> #{binary_path}/#{name}/#{checksum}.checksum` unless checksum.nil?
                    end
                end
            end
        end

        def make_options
            options = {}
            options[:sandbox] = @source_installer.sandbox
            options[:build_dir] = build_dir
            options[:output_path] = output_path
            options[:clean_build] = Jxedt.config.clean_build?
            options[:bitcode_enabled] = Jxedt.config.bitcode_enabled?
            options[:device_build_enabled] = Jxedt.config.device_build_enabled?
            options[:simulator_build_enabled] = Jxedt.config.simulator_build_enabled?
            options[:disable_dsym] = Jxedt.config.disable_dsym?
            options[:log_path] = Jxedt.config.build_log_path
            options[:args] = Jxedt.config.build_args
            options
        end

        def build_dir
            sandbox = @source_installer.sandbox
            sandbox.root.parent + "build"
        end

        def output_path
            sandbox = @source_installer.sandbox
            sandbox.standard_sandbox_root + Jxedt.config.binary_dir + "GeneratedFrameworks"
        end

        def clear_output_path
            path = output_path
            path.rmtree if path.exist?
        end
    end
end