# Copyright (c) 2022 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -exuo pipefail

# This file should be executed from tox, as the assumed working directory
# is different from where this file is located.
# This file does not have executable flag nor shebang,
# to dissuade non-tox callers.

# This script runs a two grep commands as "if" conditions,
# using log files to store the data (generated by git commands) to grep,
# failing when model implementation edits do not come with model version edit.
# The contents of the log files may be useful when fail cause is not obvious.

# "set -eu" handles failures from the following two lines.
BASH_CHECKS_DIR="$(dirname $(readlink -e "${BASH_SOURCE[0]}"))"
BASH_FUNCTION_DIR="$(readlink -e "${BASH_CHECKS_DIR}/../../function")"
source "${BASH_FUNCTION_DIR}/common.sh" || {
    echo "Source failed." >&2
    exit 1
}

impl_log="edited_files.log"
git diff --name-only HEAD~ > "${impl_log}"
if ! grep -q '^docs/model/current/schema/test_case*' "${impl_log}"; then
    # Failing grep means no model edits.
    warn "No model implementation edits detected."
    warn
    warn "CSIT model version checker: PASS"
    exit 0
fi
const_log="constants_edits.log"
git diff -U0 HEAD~ -- "resources/libraries/python/Constants.py" > "${const_log}"
if ! grep -q '^\+    MODEL_VERSION = ' "${const_log}"; then
    warn "Model implementation edits without version edit detected!"
    warn "See ${impl_log} and ${const_log} for what was detected."
    warn
    warn "CSIT model version checker: FAIL"
    exit 1
fi
doc_log="docs_edits.log"
git diff -U0 HEAD~ -- "docs/model/current/top.rst" > "${doc_log}"
if ! grep -q '^\+This document is valid for CSIT model' "${doc_log}"; then
    warn "Model implementation edits without documentation update detected!"
    warn "See ${impl_log}, ${const_log} and ${doc_log} for what was detected."
    warn
    warn "CSIT model version checker: FAIL"
    exit 1
fi
# TODO: Check constants and docs are specifying the same version.
warn "Model version and doc are edited, model implementation edits are allowed."
warn
warn "CSIT model version checker: PASS"
exit 0