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

root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
tmp_dir="$(mktemp -d)"
state_dir="$tmp_dir/state"
fake_bin_dir="$tmp_dir/bin"
output_dir="$tmp_dir/out"
docker_log="$tmp_dir/docker.log"
mkdir -p "$state_dir/container_fs" "$fake_bin_dir" "$output_dir"

cleanup() {
  rm -rf "$tmp_dir"
}
trap cleanup EXIT

cat >"$tmp_dir/fake-dbtool" <<'EOF'
#!/usr/bin/env bash
set -euo pipefail
if [ "${1:-}" = "--version" ]; then
  echo "fake-dbtool 0.1.0"
  exit 0
fi
printf '{"status":"error","state":"error","error":{"kind":"authentication"}}\n'
exit 2
EOF
chmod +x "$tmp_dir/fake-dbtool"

cat >"$fake_bin_dir/docker" <<'EOF'
#!/usr/bin/env bash
set -euo pipefail

state_dir="${MOCK_DOCKER_STATE_DIR:?}"
container_fs="$state_dir/container_fs"
docker_log="${MOCK_DOCKER_LOG:?}"

cmd="${1:?}"
shift

printf '%s %s\n' "$cmd" "$*" >>"$docker_log"

copy_into_container() {
  local src="$1"
  local dest="$2"
  mkdir -p "$(dirname "$dest")"
  cp "$src" "$dest"
}

copy_from_container() {
  local src="$1"
  local dest="$2"
  mkdir -p "$dest"
  cp -R "$src"/. "$dest"/
}

case "$cmd" in
  image)
    [ "${1:-}" = "inspect" ] || exit 90
    exit 0
    ;;
  create)
    echo "mock-sidecar-id"
    exit 0
    ;;
  start)
    exit 0
    ;;
  rm)
    exit 0
    ;;
  cp)
    src="${1:?}"
    dest="${2:?}"
    if [[ "$src" == *:* ]]; then
      container_src="${src#*:}"
      container_src="${container_src%/.}"
      copy_from_container "$container_fs$container_src" "$dest"
    else
      container_dest="${dest#*:}"
      copy_into_container "$src" "$container_fs$container_dest"
    fi
    exit 0
    ;;
  exec)
    env_pairs=()
    while [ "${1:-}" = "-e" ]; do
      env_pairs+=("${2:?}")
      shift 2
    done

    if [ "${1:-}" = "-i" ]; then
      shift
      shift
      cat >/dev/null
      exit 0
    fi

    target="${1:?}"
    shift

    case "${1:-}" in
      mkdir)
        shift
        [ "${1:-}" = "-p" ] || exit 91
        shift
        for path in "$@"; do
          mkdir -p "$container_fs$path"
        done
        exit 0
        ;;
      chmod)
        exit 0
        ;;
      bash)
        [ "${2:-}" = "-lc" ] || exit 92
        for pair in "${env_pairs[@]}"; do
          export "$pair"
        done
        out_dir="$container_fs/tmp/work/out"
        mkdir -p "$out_dir"
        cat >"$out_dir/PG-CONN-AUTH-001.md" <<EOM
### PG-CONN-AUTH-001

- Host: \`${QA_HOST_LABEL:-missing-host}\`
- Execution Path: \`${QA_EXECUTION_PATH:-missing-execution-path}\`
- Binary Path: \`${QA_BINARY_PATH_LABEL:-missing-binary-path}\`
- Binary Version: \`${QA_BINARY_VERSION:-missing-binary-version}\`
- Commit SHA: \`${QA_COMMIT_SHA:-missing-commit}\`
- Branch: \`${QA_BRANCH_NAME:-missing-branch}\`
- Result: \`pass\`
EOM
        exit 0
        ;;
      *)
        echo "unsupported docker exec target command: $*" >&2
        exit 93
        ;;
    esac
    ;;
  *)
    echo "unsupported docker command: $cmd" >&2
    exit 94
    ;;
esac
EOF
chmod +x "$fake_bin_dir/docker"

export PATH="$fake_bin_dir:$PATH"
export MOCK_DOCKER_STATE_DIR="$state_dir"
export MOCK_DOCKER_LOG="$docker_log"
export QA_HOST_LABEL="runner-host-01"
export QA_BINARY_PATH_LABEL="./target/release/dbtool"
export QA_BINARY_VERSION="dbtool 0.1.0"

"$root_dir/scripts/qa/run-failure-path-evidence-sidecar.sh" \
  "$tmp_dir/fake-dbtool" \
  "$output_dir" >/dev/null

evidence_file="$output_dir/PG-CONN-AUTH-001.md"
[ -f "$evidence_file" ] || {
  echo "expected evidence file not copied back: $evidence_file" >&2
  exit 95
}

grep -Fq 'exec -e PGPASSWORD=dbtoolroot -i dbtool-cli-v1-postgres-1 psql -v ON_ERROR_STOP=1 -U postgres -d dbtool_demo' "$docker_log" || {
  echo "expected sidecar helper to reseed postgres with admin credentials" >&2
  exit 98
}

expected_lines=(
  '### PG-CONN-AUTH-001'
  '- Host: `runner-host-01`'
  '- Execution Path: `sidecar`'
  '- Binary Path: `./target/release/dbtool`'
  '- Binary Version: `dbtool 0.1.0`'
  '- Commit SHA: `'
  '- Branch: `'
  '- Result: `pass`'
)

last_line=0
for expected in "${expected_lines[@]}"; do
  current_line="$(grep -nF -- "$expected" "$evidence_file" | head -n 1 | cut -d: -f1)"
  if [ -z "$current_line" ]; then
    echo "missing expected sidecar markdown line: $expected" >&2
    exit 96
  fi
  if [ "$current_line" -le "$last_line" ]; then
    echo "sidecar markdown order regression near: $expected" >&2
    exit 97
  fi
  last_line="$current_line"
done

echo "sidecar helper fixture passed"