#include "cgit.hpp"

#include <memory.h>
#include <iostream>
#include <sstream>

#include "utils.hpp"

#ifdef WIN32
#define DEFAULT_GIT_FILE "C:\\Program Files\\Git\\bin\\git.exe"
#else
#define DEFAULT_GIT_FILE "/usr/bin/git"
#endif

#define DEFAULT_GITHUB_URL "https://github.com/"
#define DEFAULT_MIRROR_URL "https://github.com.cnpmjs.org/"

namespace cgit {
 using namespace std;

 static string create_cmd(std::vector<string> &args) {
 std::ostringstream ss;
 for (const auto &s:args) {
#ifdef WIN32
 ss << s << " ";
#else
 ss << "\"" << s << "\" ";
#endif
 }
 return ss.str();
 }

 string get_git_file(bool q) {
 auto git = get_env("GIT", DEFAULT_GIT_FILE);
 if (git == nullptr) {
 printf("please set the environment variable `GIT`.");
 exit(-1);
 }

 string git_str(git);
 if (q && git_str[0] != '"') git_str = '"' + git_str + '"';

 return git_str;
 }

 string get_cgit_mirror() {
 string url = get_env("CGIT_MIRROR", DEFAULT_MIRROR_URL);
 if (url.length() > 0 && !url.endswith("/"))url += '/';
 return url;
 }

 int cgit_clone(vector<string> &args) {
 // 0.get env for GIT and CGIT_MIRROR
 string git_file = get_git_file();
 string mirror_url = get_cgit_mirror();

 // 1.git clone https://github.com.cnpmjs.org/killf/cgit.git
 string old_url, new_url, folder_name;
 for (size_t i = 2; i < args.size(); i++) {
 if (args[i].startsWith(DEFAULT_GITHUB_URL)) {
 old_url = args[i];
 new_url = args[i].replace(0, strlen(DEFAULT_GITHUB_URL), mirror_url.c_str());

 auto index = old_url.find_last_of('/');
 if (index != std::string::npos) {
 folder_name = old_url.substr(index + 1);
 if (folder_name.endswith(".git")) {
 folder_name = folder_name.substr(0, folder_name.size() - 4);
 }
 }
 }
 }

 args[0] = git_file.c_str();
 auto cmd1 = create_cmd(args);
 auto err = system(cmd1.c_str());
 if (err != 0 || new_url.empty() || folder_name.empty())return err;

 // 2.cd cgit
 err = cd(folder_name);
 if (err != 0)return err;

 // 3.git remote set-url origin https://github.com/killf/cgit.git
 auto cmd3 = "git remote set-url origin \"" + old_url + "\"";
 return system(cmd3.c_str());
 }
}