"""Guard: the Cafe24 upload package must be complete and safe the moment it is built.

The package is what a non-developer drags into Cafe24's FTP root, so a mistake here is
not caught by anything downstream — there is no CI on the hosting account. Every check
below encodes a failure that is silent in production:

  * a missing vendor/ autoloader fatals every request (public/index.php's `require` of
    ../vendor/autoload.php is unconditional);
  * a *dev* autoloader eagerly requires tests/Support/InMemoryRepositories.php, which is
    not in the package, so it also fatals every request;
  * a missing storage/snapshots/ silently drops every snapshot while still returning
    201 to the edge device (IngestController's `continue` on a failed write).
"""
import os
import re
import subprocess

import pytest

ROOT = os.path.normpath(os.path.join(os.path.dirname(__file__), ".."))
# cloud/deploy/, not deploy/: deploy/ belongs to the Raspberry Pi — its own README opens with
# "Edge deployment (Raspberry Pi 5, air-gapped)" and everything in it is run as root ON the
# Pi. Cafe24 runs nothing; the package is only ever uploaded. Deploying cloud/ belongs to
# cloud/, which already owns cloud/docs/cloud-deploy.md.
BUILD = os.path.join(ROOT, "cloud", "deploy", "build_cafe24_package.sh")
HTACCESS = os.path.join(ROOT, "cloud", "deploy", "htaccess.www")
CONFIG_TMPL = os.path.join(ROOT, "cloud", "deploy", "config.template.php")
CONFIG_EXAMPLE = os.path.join(ROOT, "cloud", "config.example.php")
CLOUD_DEPLOY_DOC = os.path.join(ROOT, "cloud", "docs", "cloud-deploy.md")
CONFIG_PHP = os.path.join(ROOT, "cloud", "src", "Config.php")


def _read(path):
    with open(path, encoding="utf-8") as f:
        return f.read()


# Paths are passed to bash/shellcheck relative to ROOT: Git Bash's bash is an MSYS program,
# so it resolves neither C:\a\b (backslashes vanish) nor C:/a/b (not a POSIX path) — it
# wants /c/a/b. A relative path plus cwd=ROOT sidesteps the conversion on every platform.
BUILD_REL = os.path.join("cloud", "deploy", "build_cafe24_package.sh").replace("\\", "/")


def _config_keys_read_by_app():
    """Every config.php key App\\Config actually reads (the sole consumer: its ctor is
    private and fromArray() is called once, from public/index.php)."""
    return set(re.findall(r"\$this->a\['([a-z0-9_]+)'\]", _read(CONFIG_PHP)))


def test_build_script_exists_and_is_executable_bash():
    assert os.path.isfile(BUILD), "cloud/deploy/build_cafe24_package.sh is missing"
    assert _read(BUILD).startswith("#!"), "build script needs a shebang"


def test_build_script_generates_a_no_dev_autoloader():
    sh = _read(BUILD)
    # cloud/public/index.php:3 hard-requires ../vendor/autoload.php, and
    # cloud/src/Auth/Session.php declares three symbols under one filename (hence
    # composer.json's classmap entry) — so a hand-rolled PSR-4 loader cannot resolve
    # App\Auth\PhpSessionStore. Composer's classmap dump is the only correct artifact.
    assert "composer dump-autoload" in sh
    assert "--no-dev" in sh
    assert "--classmap-authoritative" in sh


def test_build_script_excludes_dev_only_trees():
    sh = _read(BUILD)
    # Shipping the working tree's vendor/ would drag in PHPUnit *and* a dev
    # autoload_files.php that requires tests/Support/InMemoryRepositories.php on every
    # request. Shipping tests/ or phpunit.xml is dead weight on a production host.
    for forbidden in ("phpunit", "tests"):
        assert forbidden in sh, f"build script must explicitly deal with {forbidden}"


def test_build_script_mounts_the_app_in_a_subdirectory_of_www():
    sh = _read(BUILD)
    # This account's www/ already serves another site, so the app is mounted at
    # www/move_detect/ and everything secret stays at the FTP root — one level ABOVE www/,
    # two above the app. Emitting the app straight into www/ would put config.php (DB
    # password) one level up, i.e. inside a docroot the other site also serves.
    assert 'APP_DIR="${APP_DIR-move_detect}"' in sh
    assert 'WEB="$STAGE/www${APP_DIR:+/$APP_DIR}"' in sh
    # Everything private goes in ONE container beside www/, not sprayed across the FTP root:
    # that root also holds the co-hosted site's files, and `vendor/`/`config.php` are ordinary
    # names in any PHP project — a flat layout risks overwriting them.
    assert 'PRIVATE_DIR="${PRIVATE_DIR:-move_detect_app}"' in sh
    assert 'PRIV="$STAGE/$PRIVATE_DIR"' in sh
    for private in ('"$PRIV/config.php"', '"$PRIV/src/"', '"$PRIV/storage/snapshots"',
                    '"$PRIV/vendor/autoload.php"', '"$PRIV/schema.sql"'):
        assert private in sh, f"{private} must live inside the private container"
    # ...and nothing private may be staged under the web directory.
    for leaked in ('"$WEB/config.php"', '"$WEB/src/"', '"$WEB/vendor', '"$WEB/storage'):
        assert leaked not in sh, f"{leaked} would be web-reachable"


def test_app_finds_its_root_by_walking_up_not_by_a_hardcoded_depth():
    index = _read(os.path.join(ROOT, "cloud", "public", "index.php"))
    # A hardcoded '/..' resolves to www/ under a subdirectory mount — exactly where
    # config.php must never live. The walk-up makes one package work at either depth.
    assert "APP_ROOT" in index
    assert "require __DIR__ . '/../vendor/autoload.php'" not in index
    assert "require APP_ROOT . '/vendor/autoload.php'" in index
    assert "require APP_ROOT . '/config.php'" in index
    # The private container is probed at every level, and BEFORE the bare directory: the
    # co-hosted site may itself have config.php + vendor/ at the FTP root, and binding to
    # those would hand this app another site's database credentials.
    assert "APP_PRIVATE_DIR = 'move_detect_app'" in index
    assert "[$dir . '/' . APP_PRIVATE_DIR, $dir]" in index, \
        "the container must be probed before the bare directory"
    # All three markers must match. config.php + vendor/ alone are ordinary names in any PHP
    # project sharing the account; src/Config.php is specific to this app.
    for marker in ("'/config.php'", "'/vendor/autoload.php'", "'/src/Config.php'"):
        assert marker in index, f"{marker} must be part of the app-root check"


def test_build_script_creates_the_snapshot_dir():
    sh = _read(BUILD)
    # Nothing in cloud/src ever creates this directory, and a failed write is swallowed
    # by IngestController's `continue` — the API still answers 201 and the evidence is
    # gone for good.
    assert "storage/snapshots" in sh


def test_htaccess_forces_https_and_keeps_the_front_controller():
    ht = _read(HTACCESS)
    # src/Auth/Session.php hard-codes cookie_secure => true, so over plain HTTP the
    # browser never returns the session cookie and login silently fails. HTTPS is a hard
    # requirement, not hardening.
    assert "RewriteCond %{HTTPS} !=on" in ht
    assert "https://%{HTTP_HOST}%{REQUEST_URI}" in ht
    # ...without breaking the existing rewrite-to-index front controller.
    assert "RewriteRule ^ index.php [QSA,L]" in ht


def test_htaccess_denies_dotfiles_and_plaintext_servable_files():
    ht = _read(HTACCESS)
    assert "Options -Indexes" in ht
    assert re.search(r'<FilesMatch\s+"\^\\\."', ht), "dotfiles (.git, .env) must be denied"
    # schema.sql is the sharp one: Apache has no handler for .sql, so it serves the full
    # DDL as plaintext. Unlike .php, PHP will not swallow it.
    assert "sql" in ht


def test_config_template_lists_every_key_the_app_reads():
    tmpl = _read(CONFIG_TMPL)
    missing = {k for k in _config_keys_read_by_app() if f"'{k}'" not in tmpl}
    assert not missing, f"config template omits keys App\\Config reads: {sorted(missing)}"


def test_config_example_lists_every_key_the_app_reads():
    example = _read(CONFIG_EXAMPLE)
    # Silent-default bug: nonce_ttl and ingest_ip_rate_limit_per_min have `?? default`
    # fallbacks, so an operator who never sees them cannot know the knobs exist.
    missing = {k for k in _config_keys_read_by_app() if f"'{k}'" not in example}
    assert not missing, f"config.example.php omits keys App\\Config reads: {sorted(missing)}"


def test_cloud_deploy_doc_does_not_tell_operators_to_drop_vendor():
    doc = _read(CLOUD_DEPLOY_DOC)
    # public/index.php:3 is an unconditional `require` of ../vendor/autoload.php.
    # "Do not upload vendor/" bricks every request, including the doc's own smoke check.
    assert "Do not upload `vendor/`" not in doc


def test_build_script_passes_shellcheck_if_available():
    # Probe and invoke through the SAME interpreter. Probing with `bash -c command -v` and
    # then invoking shellcheck from the Windows PATH asks two different machines, so the
    # probe can pass while the call ENOENTs. And skip visibly rather than `return`, which
    # reports a green test that never ran.
    r = subprocess.run(["bash", "-c", f"command -v shellcheck >/dev/null || exit 99; "
                                      f"shellcheck -S warning {BUILD_REL}"],
                       cwd=ROOT, capture_output=True, text=True)
    if r.returncode == 99:
        pytest.skip("shellcheck not installed; bash -n still guards syntax")
    assert r.returncode == 0, f"shellcheck:\n{r.stdout}\n{r.stderr}"


def test_build_script_is_syntactically_valid_bash():
    r = subprocess.run(["bash", "-n", BUILD_REL], cwd=ROOT, capture_output=True, text=True)
    assert r.returncode == 0, f"bash -n failed:\n{r.stderr}"