require 'cocoapods-core'
require_relative '../git/http_download'
require_relative '../git/git_download'

module LgPodPlugin

  class LDownloader
    attr_accessor :request

    def initialize(pod)
      self.request = LRequest.new(pod)
    end

    # 预下载处理
    def pre_download_pod
      name = self.request.name
      podspec = self.request.podspec
      checkout_options = Hash.new.merge!(self.request.checkout_options)
      http = checkout_options[:http]
      git = checkout_options[:git]
      tag = checkout_options[:tag]
      branch = checkout_options[:branch]
      checkout_options[:name] = name if name
      unless branch
        branch = self.request.params[:branch] if self.request.params[:branch]
        checkout_options[:branch] = branch if branch
      end
      commit = checkout_options[:commit]
      if branch
        LgPodPlugin.log_green "Using `#{name}` (#{branch})"
      elsif tag
        LgPodPlugin.log_green "Using `#{name}` (#{tag})"
      elsif commit
        LgPodPlugin.log_green "Using `#{name}` (#{commit})"
      elsif http
        version = checkout_options[:version]
        LgPodPlugin.log_green "Using `#{name}` (#{version})"
      else
        LgPodPlugin.log_green "Using `#{name}`"
      end
      hash_map = self.request.get_cache_key_params
      if request.single_git
        commit = hash_map[:commit] unless commit
        checkout_options[:commit] = commit if commit
        pod_is_exist, destination, cache_pod_spec = LCache.new.pod_cache_exist(name, {:git => git}, podspec, self.request.released_pod)
      else
        pod_is_exist, destination, cache_pod_spec = LCache.new.pod_cache_exist(name, hash_map, podspec, self.request.released_pod)
      end
      if pod_is_exist
        LgPodPlugin.log_green "find the cache of `#{name}`, you can use it now."
        return nil
      else
        LgPodPlugin.log_green "find the new commit of `#{name}`, Git downloading now."

        # 本地 git 下载 pod 目录
        download_params = self.pre_download_git_repository(checkout_options)
        if download_params && download_params.is_a?(Hash)
          download_params["dirname"] = destination.dirname
          download_params["destination"] = destination
          download_params["cache_pod_spec_path"] = cache_pod_spec
          return download_params
        elsif File.exist?(download_params.to_s) && download_params
          FileUtils.chdir download_params
          LgPodPlugin::LCache.cache_pod(name, download_params, { :git => git }, podspec, self.request.released_pod) if self.request.single_git
          LgPodPlugin::LCache.cache_pod(name, download_params, self.request.get_cache_key_params,podspec, self.request.released_pod)
          FileUtils.chdir(LFileManager.download_director)
          FileUtils.rm_rf(download_params)
        end
        nil
      end

    end

    def pre_download_git_repository(checkout_options = {})
      lg_pod_path = LFileManager.cache_workspace(LProject.shared.workspace)
      lg_pod_path.mkdir(0700) unless lg_pod_path.exist?
      download_repository_strategy(lg_pod_path, checkout_options)
    end

    # 根据不同 git 源 选择下载策略
    def download_repository_strategy(path, checkout_options = {})
      FileUtils.chdir(path)
      git = checkout_options[:git]
      http = checkout_options[:http]
      if http
        begin
          checkout_options[:path] = path
          http_download = LgPodPlugin::HTTPDownloader.new(checkout_options)
          http_download.download
        rescue => exception
          LgPodPlugin.log_red "异常信息: #{$!}"
          LgPodPlugin.log_yellow " 异常位置: #{$@}"
          return nil
        end
      elsif git
        checkout_options[:path] = path
        checkout_options[:config] = self.request.config if self.request.config
        git_download = LgPodPlugin::GitDownloader.new(checkout_options)
        return git_download.download
      else
        return nil
      end

    end

  end

end