#!/usr/bin/env bash
# Тесты пакетного установщика proxy-client/install.sh во временном HOME.
set -euo pipefail

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
TEST_TMP_ROOT="$(mktemp -d /tmp/proxy-client-install-test.XXXXXX)"
trap 'rm -rf "$TEST_TMP_ROOT"' EXIT

fail() {
  echo "FAIL: $*" >&2
  exit 1
}

ok() {
  echo "ok - $*"
}

assert_link_points_to() {
  local link_path="$1" expected_path="$2"
  [ -L "$link_path" ] || fail "нет ссылки $link_path"
  [ "$(readlink -f "$link_path")" = "$expected_path" ] \
    || fail "$link_path указывает не на $expected_path"
}

assert_not_exists() {
  [ ! -e "$1" ] && [ ! -L "$1" ] || fail "путь не должен существовать: $1"
}

assert_package_links() {
  local package_dir="$1" home_dir="$2" link
  for link in .local/bin/proxy-client .config/proxy-client/shell.bash \
              .config/proxy-client/examples; do
    assert_link_points_to "$home_dir/$link" "$package_dir/$link"
  done
}

# Копия пакета в пути с пробелами и машинными файлами, которые установщик
# не должен трогать. Печатает путь к пакету; HOME создаётся рядом.
new_fixture() {
  local fixture package_dir
  fixture="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
  package_dir="$fixture/source with spaces/proxy-client"
  mkdir -p "$package_dir" "$fixture/home"
  cp -a "$REPO_ROOT/proxy-client/." "$package_dir/"
  printf 'MACHINE_CONFIG_SENTINEL\n' > "$package_dir/.config/proxy-client/config"
  printf 'PRIVATE_PROFILE_SENTINEL\n' > "$package_dir/.config/proxy-client/default.url"
  printf '%s\n' "$fixture"
}

run_install() {
  local fixture="$1"
  shift
  (cd "$TEST_TMP_ROOT" && HOME="$fixture/home" \
    "$fixture/source with spaces/proxy-client/install.sh" "$@")
}

home_snapshot() {
  find "$1" -printf '%p %y %l %s %T@\n' | sort
}

test_fresh_install() {
  local fixture home_dir package_dir output
  fixture="$(new_fixture)"
  home_dir="$fixture/home"
  package_dir="$fixture/source with spaces/proxy-client"

  run_install "$fixture" >/dev/null

  assert_package_links "$package_dir" "$home_dir"
  [ -x "$home_dir/.local/bin/proxy-client" ] || fail "CLI не исполняемый"
  assert_not_exists "$home_dir/.config/proxy-client/config"
  assert_not_exists "$home_dir/.config/proxy-client/default.url"
  output="$(
    env -i HOME="$home_dir" PATH=/usr/bin:/bin TERM=dumb bash -ic '
      command -v proxy-client && declare -F proxy_on
    ' 2>/dev/null
  )"
  [ "$output" = "$home_dir/.local/bin/proxy-client"$'\n'proxy_on ] \
    || fail "новый Bash не нашёл proxy-client и proxy_on: $output"
  ok "свежая установка: три ссылки и рабочий блок в ~/.bashrc"
}

test_repeat_changes_nothing() {
  local fixture home_dir before
  fixture="$(new_fixture)"
  home_dir="$fixture/home"
  run_install "$fixture" >/dev/null
  before="$(home_snapshot "$home_dir")"

  run_install "$fixture" >/dev/null

  [ "$(home_snapshot "$home_dir")" = "$before" ] \
    || fail "повторный запуск изменил HOME"
  ok "повторный запуск ничего не меняет"
}

test_conflicts_block_whole_install() {
  local fixture home_dir output
  fixture="$(new_fixture)"
  home_dir="$fixture/home"
  mkdir -p "$home_dir/.local/bin" "$home_dir/.config/proxy-client"
  printf 'KEEP_CLI\n' > "$home_dir/.local/bin/proxy-client"
  ln -s "$fixture/missing" "$home_dir/.config/proxy-client/examples"

  if output="$(run_install "$fixture" 2>&1)"; then
    fail "установка прошла поверх чужих файлов"
  fi

  printf '%s' "$output" | grep -Fq "$home_dir/.local/bin/proxy-client" \
    || fail "не назван конфликт CLI"
  printf '%s' "$output" | grep -Fq "$home_dir/.config/proxy-client/examples" \
    || fail "не названа битая ссылка"
  grep -Fqx KEEP_CLI "$home_dir/.local/bin/proxy-client" \
    || fail "чужой CLI изменён"
  [ "$(readlink "$home_dir/.config/proxy-client/examples")" = "$fixture/missing" ] \
    || fail "битая ссылка изменена"
  assert_not_exists "$home_dir/.config/proxy-client/shell.bash"
  assert_not_exists "$home_dir/.bashrc"
  ok "все конфликты названы сразу, частичной установки нет"
}

test_keeps_machine_files() {
  local fixture home_dir
  fixture="$(new_fixture)"
  home_dir="$fixture/home"
  mkdir -p "$home_dir/.config/proxy-client"
  printf 'HOME_CONFIG\n' > "$home_dir/.config/proxy-client/config"
  printf 'HOME_PROFILE\n' > "$home_dir/.config/proxy-client/default.url"

  run_install "$fixture" --no-shell-setup >/dev/null

  [ ! -L "$home_dir/.config/proxy-client/config" ] || fail "config стал ссылкой"
  [ ! -L "$home_dir/.config/proxy-client/default.url" ] \
    || fail "default.url стал ссылкой"
  grep -Fqx HOME_CONFIG "$home_dir/.config/proxy-client/config" \
    || fail "машинный config изменён"
  grep -Fqx HOME_PROFILE "$home_dir/.config/proxy-client/default.url" \
    || fail "default.url изменён"
  ok "машинные config и default.url не трогаются"
}

test_no_shell_setup() {
  local fixture home_dir output
  fixture="$(new_fixture)"
  home_dir="$fixture/home"

  output="$(run_install "$fixture" --no-shell-setup)"

  assert_not_exists "$home_dir/.bashrc"
  printf '%s' "$output" | grep -Fq 'proxy-client/shell.bash' \
    || fail "нет подсказки для текущей сессии"
  ok "--no-shell-setup не трогает ~/.bashrc"
}

test_linked_parent_directories() {
  local fixture home_dir package_dir
  fixture="$(new_fixture)"
  home_dir="$fixture/home"
  package_dir="$fixture/source with spaces/proxy-client"
  mkdir -p "$fixture/external-local" "$fixture/external-config"
  ln -s "$fixture/external-local" "$home_dir/.local"
  ln -s "$fixture/external-config" "$home_dir/.config"

  run_install "$fixture" --no-shell-setup >/dev/null

  assert_package_links "$package_dir" "$home_dir"
  [ -L "$fixture/external-local/bin/proxy-client" ] \
    || fail "ссылка не попала в каталог, на который указывает ~/.local"
  ok "каталоги ~/.local и ~/.config могут быть ссылками"
}

test_fresh_install
test_repeat_changes_nothing
test_conflicts_block_whole_install
test_keeps_machine_files
test_no_shell_setup
test_linked_parent_directories
echo "PASS: тесты установщика proxy-client"