#!/usr/bin/env python3
# Copyright 2023 Greptime Team
#
# 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.

"""Coverage for query-regression case group selection."""

import importlib.util
import re
import sys
import unittest
from pathlib import Path


RUNNER_PATH = Path(__file__).parents[2] / ".github/scripts/query-regression-run.py"
SPEC = importlib.util.spec_from_file_location("query_regression_run_under_test", RUNNER_PATH)
assert SPEC is not None and SPEC.loader is not None
runner = importlib.util.module_from_spec(SPEC)
sys.modules[SPEC.name] = runner
SPEC.loader.exec_module(runner)


class QueryRegressionCaseSelectionTest(unittest.TestCase):
    def test_all_selects_the_routine_default_cases(self) -> None:
        self.assertEqual(
            runner.split_cases(["all"]),
            [
                "tests/perf/query_cases/smoke_direct_sst/case.toml",
                "tests/perf/query_cases/sst_float_bss/case.toml",
                "tests/perf/query_cases/prom_remote_write_seeded_random/case.toml",
                "tests/perf/query_cases/prom_remote_write_run_heavy/case.toml",
                "tests/perf/query_cases/prom_remote_write_mixed_every/case.toml",
                "tests/perf/query_cases/prom_remote_write_integer_counter/case.toml",
                "tests/perf/query_cases/promql_range_boundary/case.toml",
                "tests/perf/query_cases/promql_instant_last_row_9034/case.toml",
                "tests/perf/query_cases/mito_prefilter_all_match/case.toml",
            ],
        )

    def test_implicit_selection_has_nine_routine_cases(self) -> None:
        self.assertEqual(len(runner.DEFAULT_CASES), 9)
        self.assertEqual(runner.split_cases([]), runner.DEFAULT_CASES)

    def test_heavy_selects_only_remote_write_7913(self) -> None:
        self.assertEqual(
            runner.split_cases(["heavy"]),
            ["tests/perf/query_cases/prom_remote_write_7913/case.toml"],
        )

    def test_explicit_paths_remain_selectable(self) -> None:
        case = "tests/perf/query_cases/sql_topk_order_by/case.toml"
        self.assertEqual(runner.split_cases([case]), [case])

    def test_sst_float_bss_omits_base_encoding_for_older_binaries(self) -> None:
        case_path = Path(__file__).parent / "query_cases/sst_float_bss/case.toml"
        setup_sql = dict(re.findall(
            r'(base|candidate)_setup_sql = \[\s*"([^"\n]+)"',
            case_path.read_text(),
        ))
        base_setup = setup_sql["base"]
        candidate_setup = setup_sql["candidate"]
        candidate_option = "'experimental_sst_float_field_encoding'='byte_stream_split'"

        self.assertNotIn("experimental_sst_float_field_encoding", base_setup)
        self.assertIn(candidate_option, candidate_setup)
        self.assertEqual(
            base_setup,
            candidate_setup.replace(f", {candidate_option}", ""),
        )


if __name__ == "__main__":
    unittest.main()