#!/usr/bin/env bash
# Phase 11.2 fail-closed gate (summercms.io Alpha 0.1 landing page).
#
# The phase spans four repositories: summercms.go (this one, the framework),
# sm-summercmsio-app (the application, a sibling directory), its site plugin
# submodule plugins/golem15/summercms and its Nuxt site submodule
# vue-summercmsio-app. Each stage runs one repository's checks. Go tests run
# with -json through a detector that requires every named test to PASS: a
# failure, a skip, a missing or renamed test, zero matched tests and "no
# tests to run" all refuse.
set -euo pipefail

SCRATCH=()
cleanup() {
	[ "${#SCRATCH[@]}" -eq 0 ] || rm -rf "${SCRATCH[@]}"
}
trap cleanup EXIT

ROOT="${PHASE11_2_ROOT:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)}"
APP="${PHASE11_2_APP:-$ROOT/../sm-summercmsio-app}"
PLUG="$APP/plugins/golem15/summercms"
SITE="$APP/vue-summercmsio-app"
# Statement coverage floors (SC5).
PLUGIN_COVERAGE_MIN=90.0

usage() {
	cat >&2 <<'EOF'
usage:
  check-phase11.2.sh --plugin
EOF
	exit 2
}

refuse() {
	echo "refuse: $*" >&2
	return 1
}

need_dir() {
	[ -d "$1" ] || refuse "$1 not found (the phase expects sm-summercmsio-app next to summercms.go)"
}

# detect_json reads a go test -json log. It refuses a build failure, any
# failed test or package, any skipped test, "no tests to run", a run with
# zero passing tests, and any required "<package> <Test>" pair (from
# PHASE11_2_REQUIRE, newline separated) that did not PASS.
detect_json() {
	python3 - "$1" <<'PY'
import json, os, sys
path = sys.argv[1]
require = [r.strip() for r in os.environ.get("PHASE11_2_REQUIRE", "").splitlines() if r.strip()]
passed = set()
with open(path, encoding="utf-8", errors="replace") as fh:
    for raw in fh:
        line = raw.strip()
        if not line.startswith("{"):
            continue
        try:
            ev = json.loads(line)
        except json.JSONDecodeError:
            print("refuse: non-json test output", file=sys.stderr)
            sys.exit(4)
        action, test, pkg = ev.get("Action"), ev.get("Test") or "", ev.get("Package") or ""
        if action == "build-fail" or (action == "fail" and ev.get("FailedBuild")):
            print(f"refuse: build failed in {pkg}", file=sys.stderr)
            sys.exit(1)
        if action == "output" and "no tests to run" in (ev.get("Output") or ""):
            print(f"refuse: no tests to run in {pkg}", file=sys.stderr)
            sys.exit(3)
        if action == "skip" and test:
            print(f"refuse: skipped {pkg} {test}", file=sys.stderr)
            sys.exit(2)
        if action == "fail":
            print(f"refuse: failed {pkg} {test}".rstrip(), file=sys.stderr)
            sys.exit(1)
        if action == "pass" and test:
            passed.add(f"{pkg} {test}")
if not passed:
    print("refuse: zero tests", file=sys.stderr)
    sys.exit(3)
missing = [r for r in require if r not in passed]
if missing:
    print("refuse: named tests did not pass (missing, renamed or filtered out): " + ", ".join(missing), file=sys.stderr)
    sys.exit(5)
print(f"named tests passed: {len(require)} required, {len(passed)} passing (subtests included)")
PY
}

# named_tests DIR PKG NAME... runs `go -C DIR test -json -count=1 PKG -run
# '^(NAME|...)$'` and requires every named test to PASS. Environment set on
# the call (VAR=1 named_tests ...) reaches go test; run it in a subshell to
# unset a variable for one call.
named_tests() {
	local dir="$1" pkg="$2" log import names name require="" code=0
	shift 2
	import="$(go -C "$dir" list -f '{{.ImportPath}}' "$pkg")" || refuse "go list $pkg in $dir failed" || return 1
	names="$(IFS='|'; echo "$*")"
	for name in "$@"; do
		require+="$import $name"$'\n'
	done
	log="$(mktemp)"
	go -C "$dir" test -json -count=1 "$pkg" -run "^($names)\$" >"$log" 2>&1 || code=$?
	if ! PHASE11_2_REQUIRE="$require" detect_json "$log"; then
		rm -f "$log"
		return 1
	fi
	rm -f "$log"
	[ "$code" -eq 0 ] || refuse "go test $pkg in $dir exited $code"
}

# coverage_at_least DIR MIN PKG... prints the total statement coverage of
# the packages and refuses when it is below MIN. Build-gated tests skip
# here (their variables are cleared), so the figure comes from tests that
# need no build output.
coverage_at_least() {
	local dir="$1" min="$2" profile total
	shift 2
	profile="$(mktemp)"
	SCRATCH+=("$profile")
	env -u SUMMERCMS_REQUIRE_BUILD -u SUMMERCMS_TERMINAL_CHECK -u SUMMERCMS_CHECK_EXTERNAL \
		go -C "$dir" test -count=1 -coverprofile="$profile" "$@" >/dev/null || refuse "coverage run in $dir failed" || return 1
	total="$(go -C "$dir" tool cover -func="$profile" | awk '/^total:/ {sub("%", "", $NF); print $NF}')"
	[ -n "$total" ] || refuse "no coverage total in $dir" || return 1
	echo "coverage: $total% of statements in $dir (minimum $min%)"
	awk -v t="$total" -v m="$min" 'BEGIN { exit !(t + 0 >= m + 0) }' || refuse "coverage $total% is below $min% in $dir"
}

PLUGIN_TESTS=(TestStaticSmoke TestStaticSite TestStaticDocs TestStaticConditionalAndRange TestStaticNoBlockingHeaders
	TestStaticRedirectLocations TestStaticMissing404Page TestNewHandlersMissingIndex TestContentType TestSiteImmutable
	TestRoutesAssemble TestRoutesFailClosed TestRoutesCoexistWithAdminPatterns TestPluginIdentity TestPluginEmbeddedTree
	TestPageLinks TestResolve)

run_plugin() {
	need_dir "$PLUG"
	go -C "$PLUG" vet ./...
	(unset SUMMERCMS_REQUIRE_BUILD && named_tests "$PLUG" . "${PLUGIN_TESTS[@]}") || refuse "plugin: named tests"
	coverage_at_least "$PLUG" "$PLUGIN_COVERAGE_MIN" ./...
	echo "phase11.2 plugin passed"
}

case "${1:-}" in
--plugin) run_plugin ;;
*) usage ;;
esac