#include "versiond/versiond.hpp"
#include <cstdlib>
#include <filesystem>
#include <fstream>
namespace fs = std::filesystem;
namespace versiond {
static std::string trim(std::string s) {
  auto a = s.find_first_not_of(" \t\r\n");
  if (a == std::string::npos) return "";
  auto b = s.find_last_not_of(" \t\r\n");
  return s.substr(a, b - a + 1);
}
static std::string unq(std::string s) {
  s = trim(s);
  if (s.size() >= 2 && s.front() == '"' && s.back() == '"') return s.substr(1, s.size() - 2);
  return s;
}
Config default_config() { return Config{}; }
Config load_config(const std::string& home) {
  Config c;
  const char* e = std::getenv("VERSIOND_HOME");
  c.home = home.empty() ? (e ? e : std::string("/tmp/versiond")) : home;
  c.config_dir = c.home + "/config";
  c.data_dir = c.home + "/data";
  c.spool_dir = c.data_dir + "/spool";
  c.index_file = c.data_dir + "/index.sqlite";
  c.config_file = c.config_dir + "/config.toml";
  fs::create_directories(c.spool_dir);
  fs::create_directories(c.config_dir);
  std::ifstream f(c.config_file);
  if (!f) {
    std::ofstream o(c.config_file);
    o << "[server]\nhost = \"" << c.host << "\"\nport = " << c.port << "\n";
    o << "\n[retention]\nkeep_days = " << c.keep_days << "\n";
    o << "\n[remote]\nurl = \"\"\nusername = \"\"\nbase_path = \"" << c.remote_base << "\"\n";
    o << "\n[limits]\nmax_file_bytes = " << c.max_file_bytes << "\n";
  } else {
    std::string line, section;
    while (std::getline(f, line)) {
      line = trim(line);
      if (line.empty() || line[0] == '#') continue;
      if (line.front() == '[' && line.back() == ']') {
        section = line.substr(1, line.size() - 2);
        continue;
      }
      auto eq = line.find('=');
      if (eq == std::string::npos) continue;
      std::string k = trim(line.substr(0, eq)), v = trim(line.substr(eq + 1));
      if (section == "server" && k == "host") c.host = unq(v);
      else if (section == "server" && k == "port") c.port = std::stoi(v);
      else if (section == "retention" && k == "keep_days") c.keep_days = std::stoi(v);
      else if (section == "remote" && k == "url") c.remote_url = unq(v);
      else if (section == "remote" && k == "username") c.remote_user = unq(v);
      else if (section == "remote" && k == "base_path") c.remote_base = unq(v);
      else if (section == "limits" && k == "max_file_bytes") c.max_file_bytes = std::stoull(v);
      else if (section == "server" && k == "verify_tls") c.verify_tls = (v == "true");
    }
  }
  return c;
}
}