local _VERSION = '0.1.0';

local createCcpm = require('/apis/libccpm');

local args = table.pack(...);
local command = args[1];

local function printUsage()
  print('ccpm usage:');
  print();
  print('\t\tccpm install <package>');
  print('\t\tccpm reinstall <package>');
  print('\t\tccpm uninstall <package>');
  print('\t\tccpm ls');
  print('\t\tccpm search [term]');
  print('\t\tccpm info <package>');
  print('\t\tccpm registry ls');
  print('\t\tccpm registry add <name> [--branch <b>] [--type github|http]');
  print('\t\tccpm registry rm <name>');
  print('\t\tccpm version');
  print('\t\tccpm help');
end

if command == 'version' or command == '-version' or command == '--version' then
  print('ccpm v' .. _VERSION);
  return;
end

if command == nil or command == '' or command == 'help' or command == '-help' or command == '--help' then
  printUsage();
  return;
end

local ccpm = createCcpm();

local function logLine(msg)
  print(msg);
end

if command == 'install' or command == 'reinstall' then
  local pkg = args[2];
  if not pkg then printUsage(); return; end
  local ok, result = ccpm.install(pkg, { force = command == 'reinstall', log = logLine });
  if not ok then
    print(result);
    return;
  end
  print('=> ' .. pkg .. ' installed.');
  return;
end

if command == 'uninstall' or command == 'remove' or command == 'rm' then
  local pkg = args[2];
  if not pkg then printUsage(); return; end
  local ok, err = ccpm.uninstall(pkg, { log = logLine });
  if not ok then
    print(err);
    return;
  end
  print('=> ' .. pkg .. ' uninstalled.');
  return;
end

if command == 'ls' or command == 'list' then
  local packages = ccpm.list();
  local names = {};
  for name in pairs(packages) do names[#names + 1] = name; end
  table.sort(names);
  if #names == 0 then
    print('No packages installed.');
    return;
  end
  for _, name in ipairs(names) do
    print(name .. ' v' .. tostring(packages[name].version or '?'));
  end
  return;
end

if command == 'search' then
  local results = ccpm.search(args[2]);
  if #results == 0 then
    print('No packages found.');
    return;
  end
  for _, r in ipairs(results) do
    print(r.name .. ' v' .. tostring(r.version) .. ' (' .. r.registry .. ')');
  end
  return;
end

if command == 'info' then
  local pkg = args[2];
  if not pkg then printUsage(); return; end
  local desc = ccpm.info(pkg);
  if not desc then
    print('package not found: ' .. pkg);
    return;
  end
  print(desc.name .. ' v' .. tostring(desc.version or '?'));
  if desc.description then print(desc.description); end
  if desc.dependencies and #desc.dependencies > 0 then
    print('dependencies: ' .. table.concat(desc.dependencies, ', '));
  end
  print('files:');
  for _, f in ipairs(desc.files or {}) do print('  ' .. f); end
  return;
end

if command == 'registry' then
  local sub = args[2];

  if sub == nil or sub == 'ls' or sub == 'list' then
    local registries = ccpm.listRegistries();
    if #registries == 0 then
      print('No registries configured.');
      return;
    end
    for _, r in ipairs(registries) do
      if r.type == 'github' then
        print(r.name .. ' (github:' .. tostring(r.branch or 'master') .. ')');
      else
        print(r.name .. ' (' .. tostring(r.type or 'http') .. ')');
      end
    end
    return;
  end

  if sub == 'add' then
    local name = args[3];
    if not name then printUsage(); return; end
    local branch, rtype;
    local i = 4;
    while i <= args.n do
      local a = args[i];
      if a == '--branch' then
        branch = args[i + 1];
        i = i + 1;
      elseif a == '--type' then
        rtype = args[i + 1];
        i = i + 1;
      end
      i = i + 1;
    end
    local ok, err = ccpm.addRegistry(name, { branch = branch, type = rtype });
    if not ok then
      print(err);
      return;
    end
    print('=> registry added: ' .. name);
    return;
  end

  if sub == 'rm' or sub == 'remove' then
    local name = args[3];
    if not name then printUsage(); return; end
    local ok, err = ccpm.removeRegistry(name);
    if not ok then
      print(err);
      return;
    end
    print('=> registry removed: ' .. name);
    return;
  end

  printUsage();
  return;
end

printUsage();