#!/usr/bin/env bash
set -euo pipefail

repository_root=$(cd "$(dirname "$0")/.." && pwd)
dockerfile="$repository_root/docker/tht.Dockerfile"
builder_image=$(awk '$1 == "FROM" && $3 == "AS" && $4 == "build" { print $2; exit }' "$dockerfile")
expected_builder='golang:1.26.5-bookworm@sha256:1ecb7edf62a0408027bd5729dfd6b1b8766e578e8df93995b225dfd0944eb651'

if [[ "$builder_image" != "$expected_builder" ]]; then
  echo "tht builder must pin golang:1.26.5-bookworm by the approved multi-platform digest" >&2
  exit 1
fi

grep -qx 'go 1.26.0' "$repository_root/tools/tht/go.mod"
grep -qx 'toolchain go1.26.5' "$repository_root/tools/tht/go.mod"
grep -Eq '^[[:space:]]*github.com/sirupsen/logrus v1\.9\.1$' "$repository_root/tools/tht/go.mod"
grep -Eq '^[[:space:]]*golang.org/x/sys v0\.47\.0$' "$repository_root/tools/tht/go.mod"

manifest=$(docker buildx imagetools inspect "$builder_image")
printf '%s\n' "$manifest" | grep -Eq 'Platform:[[:space:]]+linux/amd64'
printf '%s\n' "$manifest" | grep -Eq 'Platform:[[:space:]]+linux/arm64'

temporary_output=$(mktemp -d)
trap 'rm -rf "$temporary_output"' EXIT HUP INT TERM
test_version='9.8.7-test'
test_commit='0123456789abcdef0123456789abcdef01234567'
test_build_time='2026-09-07T01:00:00+02:00'
docker build \
  --build-arg "THT_VERSION=$test_version" \
  --build-arg "THT_COMMIT=$test_commit" \
  --build-arg "THT_BUILD_TIME=$test_build_time" \
  --file "$dockerfile" \
  --output "type=local,dest=$temporary_output" \
  "$repository_root" >/dev/null

test -s "$temporary_output/tht-windows-amd64.exe"
test -s "$temporary_output/tht-darwin-amd64"
test -s "$temporary_output/tht-darwin-arm64"
test -s "$temporary_output/tht-linux-amd64"
test -s "$temporary_output/tht-linux-arm64"

version_json=$($temporary_output/tht-linux-amd64 version --json)
printf '%s\n' "$version_json" | grep -Fq '"version":"9.8.7-test"'
printf '%s\n' "$version_json" | grep -Fq '"commit":"0123456789abcdef0123456789abcdef01234567"'
printf '%s\n' "$version_json" | grep -Fq '"buildTime":"2026-09-07T01:00:00+02:00"'

echo "tht build contract passed."