#!/usr/bin/env bash
# Checks that need no WordPress: syntax, plugin hygiene, version consistency,
# and whether the plugin header still tells the truth about what it supports.
#
# Fast enough to run before every commit. `ci/site-test.sh` is the slow half.
set -uo pipefail

cd "$(dirname "$0")/.."
. ci/lib.sh
ci_load_conf

fails=0
note_fail() { ci_fail "$1"; fails=$((fails + 1)); }

# Only files that actually reach a server. A tool under ci/ has no business
# carrying an ABSPATH guard, and a test file is not shipped at all. Same list
# the release zip is built from, so the two cannot drift.
shipped_files() {
  ./ci/dist-files.sh | grep '\.php$' || true
}

ci_step "PHP syntax"
# The header promises a minimum PHP version; without it in the loop a piece of
# newer syntax passes here and fatals on the customer's server instead.
min_php=$(ci_plugin_header 'Requires PHP')
tarball=$(mktemp -t wpci-lint-XXXXXX.tar)
git ls-files -z '*.php' | tar --null -T - -cf "$tarball"
for v in "${min_php:-7.4}" 8.4; do
  echo "  php $v"
  # docker cp of a tarball, not -v "$PWD":/src — a Gitea Actions job runs
  # inside a container talking to the HOST's docker daemon, so a host path
  # here mounts an empty directory nobody created and the lint passes by
  # linting nothing. Copying a directory needs its parent to already exist in
  # the container, which /src does not; a single file into /tmp always works.
  cid=$(docker create "php:$v-cli" sh -c '
    set -e
    mkdir -p /src && tar -xf /tmp/src.tar -C /src
    n=0
    for f in $(find /src -name "*.php"); do php -l "$f" >/dev/null; n=$((n + 1)); done
    echo "    $n files parse"
    # Guards against the failure this step had on its first run: an empty /src
    # makes the loop a no-op and the whole check reports success.
    [ "$n" -gt 0 ] || { echo "    no PHP files arrived in the container" >&2; exit 1; }')
  docker cp "$tarball" "$cid:/tmp/src.tar" >/dev/null
  code=0
  docker start -a "$cid" || code=$?
  docker rm -f "$cid" >/dev/null
  [ "$code" = 0 ] || note_fail "PHP $v cannot parse this plugin."
done
rm -f "$tarball"

ci_step "protection against direct access"
# Without the guard a PHP file can be requested straight from the browser,
# outside WordPress and therefore outside every capability check the code
# assumes has already happened.
#
# 🔴 Tokenised by ci/check-abspath.php, not grepped. The grep version asked
# whether the words appeared anywhere in the file, so a COMMENT saying the
# guard was handled elsewhere passed it. Measured with a planted file whose
# only mention was in a comment: "15 shipped PHP files examined, every one
# guarded" — green over a file with no guard at all.
#
# The count and the floor stay: "every shipped file is guarded" is also what
# zero shipped files prints, and shipped_files() swallows a dist-files.sh
# failure with `|| true`. The floor is above 1 because a bad .distignore
# pattern can collapse the list without emptying it.
shipped_php=$(shipped_files)
if [ -z "$shipped_php" ]; then
  note_fail "No shipped PHP files were listed at all. The file list is wrong, so this check proved nothing."
else
  # shellcheck disable=SC2086
  ci_php ci/check-abspath.php "--min=$MIN_SHIPPED_PHP_FILES" $shipped_php || fails=$((fails + 1))
fi

ci_step "no debug leftovers"
if git ls-files -z '*.php' | xargs -0 grep -nE '\b(var_dump|print_r|dd)[[:space:]]*\(' ; then
  note_fail "Debug functions must not ship."
else
  echo "  none"
fi

ci_step "no short open tags, no closing ?>"
before=$fails
# With short_open_tag off the code is printed to the visitor as text instead of
# being run; whitespace after a closing tag is sent to the browser and breaks
# headers and redirects.
if git ls-files -z '*.php' | xargs -0 grep -nP '<\?(?!php|=|xml)' ; then
  note_fail "Use <?php, not short open tags."
fi
# -z: git quotes non-ASCII paths, and the quoted form is not a path that
# exists, so this loop would silently skip the file it was meant to check.
while IFS= read -r -d '' f; do
  [ -n "$f" ] || continue
  [ "$(tail -c 3 "$f" | tr -d '[:space:]')" = "?>" ] \
    && { ci_annotate error "$f" 1 "Remove the trailing ?> at the end of the file."; fails=$((fails + 1)); }
done < <(git ls-files -z '*.php')
[ "$fails" = "$before" ] && echo "  clean"

ci_step "text domain"
# --min is deliberately far below the real count. It is not an assertion about
# how many strings this plugin has — a tight number goes red on ordinary churn
# and gets raised until it means nothing. It asserts the scan still finds this
# plugin's strings AT ALL, because "every translation call carries the text
# domain" is also what this prints having found none.
ci_php ci/check-textdomain.php "--min=$MIN_TRANSLATION_CALLS" "$TEXT_DOMAIN" . || fails=$((fails + 1))

ci_step "every file the plugin loads is a file the release contains"
# The bug this exists for: a new class file is written, required from the main
# file, works perfectly in every local test because it is sitting right there
# in the working tree — and is not committed, so the release zip does not have
# it. This plugin degrades instead of fataling on a missing include, which is
# good for a half-finished upgrade and terrible here: the shop would just
# quietly lose a feature.
shipped=$(./ci/dist-files.sh)
referenced=$(printf '%s\n' "$shipped" | grep '\.php$' | xargs grep -ohE "'[A-Za-z0-9_./-]+\.php'" 2>/dev/null | tr -d "'" | sort -u)
checked=0
for path in $referenced; do
  # A plugin-relative include always names a directory of this plugin. That
  # rules out the look-alikes: "admin-ajax.php" and "admin.php" are admin URLs
  # and menu slugs, "woocommerce/woocommerce.php" is another plugin's basename,
  # and "wp-admin/includes/upgrade.php" is resolved against ABSPATH.
  case "$path" in */*) ;; *) continue ;; esac
  [ -d "${path%%/*}" ] || continue
  checked=$((checked + 1))
  # `case` rather than piping the list into grep -qx: under pipefail a grep
  # that matches can exit 141 when the producer is signalled, so a HIT becomes
  # a failure. The list is small today and this loop runs once per include, so
  # this also drops a fork per iteration. Newlines on both sides make it an
  # exact line match, which is what -qx gave.
  case $'\n'"$shipped"$'\n' in
    *$'\n'"$path"$'\n'*) ;;
    *) note_fail "The code loads '$path', but the release zip does not contain it. Committed?" ;;
  esac
done
if [ "$checked" = 0 ]; then
  # A check that verifies nothing must say so rather than reporting success.
  # Not a failure: a single-file plugin, or one with an autoloader instead of
  # a list of requires, legitimately has nothing here.
  echo "::warning::No plugin-relative include was found to check. That is expected for a single-file plugin or an autoloader, and a broken scan otherwise."
else
  echo "  $checked plugin-relative include(s) checked"
fi

ci_step "one version, stated once"
# WordPress compares the update feed against the header and nothing else, so a
# constant or a readme that disagrees with it is how a release ends up either
# offered forever or never offered at all.
version=$(ci_plugin_version)
echo "  plugin header: $version"
[ -n "$version" ] || note_fail "Could not read Version: from $PLUGIN_MAIN."

while read -r line; do
  [ -n "$line" ] || continue
  const=${line%%=*}
  value=${line#*=}
  echo "  $const: $value"
  [ "$value" = "$version" ] \
    || note_fail "$const is $value but the plugin header says $version."
done <<< "$(sed -n -E "s/^[[:space:]]*define\([[:space:]]*'([A-Z_]*VERSION)'[[:space:]]*,[[:space:]]*'([^']+)'.*/\1=\2/p" "$PLUGIN_MAIN")"

for readme in readme.txt README.txt; do
  [ -f "$readme" ] || continue
  stable=$(sed -n -E 's/^Stable tag:[[:space:]]*([^[:space:]]+).*/\1/p' "$readme" | head -1)
  echo "  $readme stable tag: ${stable:-<none>}"
  [ "$stable" = "$version" ] \
    || note_fail "$readme has 'Stable tag: $stable' but the plugin header says $version."
done

ci_step "the update feed and the release target name the same repository"
# 🔴 The header is what every installed copy polls; RELEASE_REPO is where the
# zip is actually published. If they disagree, the shop keeps asking an address
# nothing is published to any more and quietly stops receiving updates —
# latest_release() just returns false, and nothing says so. Same failure as a
# privacy page that stands still while the code moves: the two must change in
# one commit, and this is what makes that impossible to forget.
update_uri=$(ci_plugin_header 'Update URI')
echo "  Update URI:   ${update_uri:-<missing>}"
echo "  RELEASE_REPO: $RELEASE_REPO"
case "$update_uri" in
  */"$RELEASE_REPO") echo "  they agree" ;;
  *) note_fail "Update URI is '$update_uri' but releases are published to '$RELEASE_REPO'. Installed copies poll the header, so they would stop being offered updates without a word." ;;
esac

ci_step "the shared menu file is the family copy"
# includes/shared-menu.php is byte-identical in all six plugins. Editing it
# here would not make this plugin's version win — which copy a site loads is
# decided by activation order, and PHP cannot un-declare a function — it would
# make the menu differ between shops depending on which plugin booted first,
# and change its mind when one is deactivated. So the file is frozen, and
# taking a new version is something all six do in the same window.
shared_menu=includes/shared-menu.php
if [ ! -f "$shared_menu" ]; then
  echo "::warning::$shared_menu is not present, so this plugin registers no shared menu."
else
  have=$(sha256sum "$shared_menu" | cut -d" " -f1)
  echo "  sha256: $have"
  [ "$have" = "$WPMGR_MENU_SHA" ] \
    && echo "  matches the frozen family copy" \
    || note_fail "$shared_menu does not match the frozen family copy. Expected $WPMGR_MENU_SHA, got $have. Do not edit it — take the new version the others took."
fi

ci_step "no secrets in tracked files"
# Suggested by the AI-manager port, and it costs nothing: a pushed key cannot be
# unpushed. It has to be rotated, and the window between the push and noticing
# is the whole problem.
#
# Two rules, at two different confidence levels.
#
# The first is content-anchored: prefixes that mean one thing only. Broad
# ENTROPY heuristics are still refused here — they fire on minified assets,
# hashes and base64 images, and a check that cries wolf gets commented out,
# which is worse than not having it.
#
# The second is name-anchored, and closes a hole the first cannot see. A prefix
# list matches the shape of a VALUE, so it is blind to any credential that does
# not carry a vendor's marker: an api_key assigned twenty opaque characters
# walks straight past it. This is not an entropy heuristic — it fires only
# where the code itself names the value a secret, which is why it does not
# touch a minified asset. Obvious placeholders are excluded so a settings
# default does not cry wolf.
#
# ⚠️ It DOES fire on a documentation example, and there is no bypass marker on
# purpose — an unexercised escape hatch is its own hollow check. The first
# version of this comment spelled the example out in full and the rule flagged
# its own explanation, which is the one false positive measured so far. Write
# such an example in prose, or break the literal up.
#
# 🔴 A count cannot tell you a pattern is not INERT. Proven the hard way in a
# sibling plugin: it planted an AWS key, the file count rose, and the scan
# passed green — that prefix was simply missing from its list. So every shape
# claimed below is planted and run through this whole script, not grepped in
# isolation, and a lookalike control is checked not to fire.
#
# 🔴 And it says how many files it read. A pushed key is compromised even after
# the commit is deleted, so this scan silently examining nothing is not a weak
# check — it is the absence of one, wearing a green tick.
#
# The floor here is 1 and is NOT plugin-configurable, unlike the shipped-file
# one above: this list is every tracked file with no filter that could go
# partially wrong, so the only way it misreports is by coming out empty, and
# any higher number would just be a guess about the plugin's size. The count on
# the success line is what catches a list that shrank without emptying.
secret_value_pat='(sk-ant-[A-Za-z0-9_-]{16,}|sk-[A-Za-z0-9]{32,}|ghp_[A-Za-z0-9]{30,}|gho_[A-Za-z0-9]{30,}|github_pat_[A-Za-z0-9_]{50,}|AKIA[0-9A-Z]{16}|-----BEGIN [A-Z ]*PRIVATE KEY-----)'

# The code calls it a secret and then hands it twenty-odd opaque characters.
secret_name_pat="['\"](api[_-]?key|secret|password|passwd|token|auth[_-]?token|private[_-]?key)['\"][[:space:]]*(=>|=|:)[[:space:]]*['\"][A-Za-z0-9/+_-]{20,}['\"]|define\([[:space:]]*['\"][A-Z0-9_]*(SECRET|PASSWORD|TOKEN|API_KEY)['\"][[:space:]]*,[[:space:]]*['\"][A-Za-z0-9/+_-]{20,}['\"]"

# A default nobody has filled in yet is not a leak. Without this the check goes
# red on the one thing a settings screen is guaranteed to contain.
placeholder_pat='REPLACE|YOUR[_-]|EXAMPLE|CHANGE[_-]?ME|TODO|FIXME|PLACEHOLDER|xxxxx|XXXXX|\*\*\*\*'

before=$fails
secrets_scanned=0
while IFS= read -r -d '' f; do
  [ -f "$f" ] || continue
  secrets_scanned=$((secrets_scanned + 1))
  # No -I here, deliberately, and the two rules differ on this for a reason.
  # grep -I SILENTLY SKIPS a file it decides is binary, so a PEM header inside
  # one would be waved through without a word. Without -I the same file reports
  # "binary file matches" and fails, which is the right direction to be wrong
  # in. (Narrowed by accident when the name rule was added, and caught only by
  # asking what the flag actually does — the tree has no binary files today, so
  # nothing went red to announce it.)
  if LC_ALL=C grep -nE "$secret_value_pat" "$f"; then
    note_fail "$f looks like it contains a credential. It cannot be unpushed — rotate it."
  fi
  # -I is right HERE: this rule is heuristic and name-anchored, so a chance
  # match inside a compiled asset is noise, not a finding.
  if LC_ALL=C grep -nEI "$secret_name_pat" "$f" | LC_ALL=C grep -vE "$placeholder_pat"; then
    note_fail "$f assigns a long opaque value to something the code calls a secret. If it is one, it cannot be unpushed — rotate it."
  fi
done < <(git ls-files -z)
if [ "$secrets_scanned" -lt 1 ]; then
  note_fail "The credential scan examined no files at all. git tracks nothing here, so this check proved nothing."
elif [ "$fails" = "$before" ]; then
  echo "  $secrets_scanned tracked files read, nothing that looks like a key or a private key"
fi

ci_step "no placeholders left in the plugin header"
# The header is the plugin's business card: wp-admin shows the author and the
# links to whoever installs it, so a placeholder there survives for as long as
# nobody happens to look at that screen. This plugin shipped with
# "https://example.com/" as its Plugin URI for several releases.
#
# It catches the generic markers only. A made-up vendor name — this one went
# out as "WEDSMP" — looks exactly like a real one to any check, so an empty
# field is warned about but a wrong-but-plausible value cannot be.
before=$fails
for field in 'Plugin Name' 'Description' 'Author' 'Author URI' 'Plugin URI'; do
  value=$(ci_plugin_header "$field")
  if [ -z "$value" ]; then
    echo "::warning::The plugin header has no '$field:'."
    continue
  fi
  case "$value" in
    *example.com*|*example.org*|*yourname*|*YOUR_*|*TODO*|*FIXME*|*changeme*|*'<'*'>'*)
      note_fail "$field is still a placeholder: $value"
      ;;
  esac
done
[ "$fails" = "$before" ] && echo "  name, description, author and links are all filled in"

ci_step "the compatibility headers still tell the truth"
# Advisory, never fatal. WordPress ships a new version whether or not anything
# here is wrong, and a build that goes red on release day for a header nobody
# has had a chance to update yet is a build that gets ignored. What this does
# is make the staleness visible; compat.yml opens the PR that fixes it, but
# only once the real tests have passed against the new version.

# stable-check, not version-check: version-check's payload also carries old
# offers, and a loose match on it returned "4.7.35" as the current release.
current_wp=$(curl -fsS --max-time 20 'https://api.wordpress.org/core/stable-check/1.0/' 2>/dev/null \
  | tr ',' '\n' | sed -n -E 's/.*"([0-9][^"]*)"[[:space:]]*:[[:space:]]*"latest".*/\1/p' | head -1)
current_wc=$(curl -fsS --max-time 20 'https://api.wordpress.org/plugins/info/1.0/woocommerce.json' 2>/dev/null \
  | sed -n -E 's/.*"version":"([^"]+)".*/\1/p' | head -1)

behind() { # claimed current -> true when claimed is the older of the two
  [ -n "$1" ] && [ -n "$2" ] || return 1
  [ "$1" != "$2" ] && [ "$(printf '%s\n%s\n' "$1" "$2" | sort -V | head -1)" = "$1" ]
}

# "Tested up to" is a readme.txt field — WordPress never reads it from the
# plugin header, so checking the header for it reports "missing" on a plugin
# that states it correctly. "WC tested up to" is the opposite: WooCommerce
# reads that one from the plugin header and nowhere else.
readme=
for f in readme.txt README.txt; do [ -f "$f" ] && readme=$f && break; done

tested_wp=
[ -n "$readme" ] && tested_wp=$(sed -n -E 's/^Tested up to:[[:space:]]*([^[:space:]]+).*/\1/p' "$readme" | head -1)
echo "  WordPress:   ${readme:-readme} says ${tested_wp:-<missing>}, current release is ${current_wp:-<unknown>}"
if [ -z "$tested_wp" ]; then
  echo "::warning::No 'Tested up to:' in ${readme:-the readme}. WordPress lists the plugin as untested."
elif behind "$tested_wp" "$current_wp"; then
  echo "::warning::'Tested up to: $tested_wp' is behind WordPress $current_wp."
fi

if [ "$NEEDS_WOOCOMMERCE" = yes ]; then
  tested_wc=$(ci_plugin_header 'WC tested up to')
  echo "  WooCommerce: plugin header says ${tested_wc:-<missing>}, current release is ${current_wc:-<unknown>}"
  if [ -z "$tested_wc" ]; then
    echo "::warning::No 'WC tested up to:' in the plugin header. WooCommerce then shows this plugin as untested in wp-admin — that banner is exactly what a shop owner reads before deciding whether to press update."
  elif behind "$tested_wc" "$current_wc"; then
    echo "::warning::'WC tested up to: $tested_wc' is behind WooCommerce $current_wc."
  fi

  requires_wc=$(ci_plugin_header 'WC requires at least')
  echo "  WooCommerce minimum: ${requires_wc:-<missing>}"
fi

echo
if [ "$fails" != 0 ]; then
  echo "$fails check(s) failed."
  exit 1
fi
echo "Static checks: green."