# Copyright Advanced Micro Devices, Inc.
# SPDX-License-Identifier: MIT

"""Base class for functional tests with common functionality."""

import sys
from pathlib import Path
from typing import Any, Dict, List
from prettytable import PrettyTable

# Add parent directory to path for utils import
sys.path.insert(0, str(Path(__file__).resolve().parents[2]))

from utils.logger import log
from utils.exceptions import TestExecutionError, TestResultError
from utils.extended_test_base import ExtendedTestBase, gha_append_step_summary


class FunctionalBase(ExtendedTestBase):
    """Base class providing common functional test logic.

    Inherits shared infrastructure from ExtendedTestBase (execute_command,
    create_test_result, calculate_statistics, upload_results, etc.).

    Child classes must implement run_tests() and parse_results().
    """

    def __init__(self, test_name: str, display_name: str = None):
        """Initialize functional test.

        Args:
            test_name: Internal test name (e.g., 'miopen_driver_conv')
            display_name: Display name for reports (e.g., 'MIOpen Driver Convolution')
        """
        super().__init__(test_name, display_name or test_name)
        self.script_dir = Path(__file__).resolve().parent

    def create_result_tables(
        self, test_results: List[Dict[str, Any]], stats: Dict[str, Any]
    ) -> tuple:
        """Create detailed and summary result tables."""
        # Build detailed table and count suites
        detailed_table = PrettyTable()
        detailed_table.field_names = ["TestSuite", "TestCase", "Status"]

        suites = set()
        for result in test_results:
            suite = result.get(
                "suite", result.get("test_config", {}).get("suite", "unknown")
            )
            subtest = result.get("subtest", "unknown")
            status = result.get("status", "FAIL")

            suites.add(suite)
            detailed_table.add_row([suite, subtest, status])

        # Build summary table
        summary_table = PrettyTable()
        summary_table.field_names = [
            "Total TestSuites",
            "Total TestCases",
            "Passed",
            "Failed",
            "Errored",
            "Skipped",
            "Final Result",
        ]

        for field in summary_table.field_names:
            summary_table.min_width[field] = 17

        summary_table.add_row(
            [
                len(suites),
                stats["total"],
                stats["passed"],
                stats["failed"],
                stats["error"],
                stats["skipped"],
                stats["overall_status"],
            ]
        )

        return detailed_table, summary_table

    def run(self) -> None:
        """Execute functional test workflow.

        Raises:
            TestExecutionError: If test execution encounters errors
            TestResultError: If tests run but results show failures
        """
        log.info(f"{self.display_name} - Starting Functional Test")

        # Run tests (implemented by child class)
        self.run_tests()

        # Parse results (implemented by child class)
        test_results = self.parse_results()

        # Validate test results structure
        if not test_results:
            raise TestExecutionError(
                "No test results generated - parse_results() returned empty list\n"
                "Check if tests executed successfully and results were saved to file"
            )

        # Generate statistics and tables
        stats = self.calculate_statistics(test_results)
        detailed_table, summary_table = self.create_result_tables(test_results, stats)

        # Display results
        log.info("DETAILED RESULTS")
        log.info(f"\n{detailed_table}")

        log.info("\nSUMMARY")
        log.info(f"\n{summary_table}")
        log.info(f"\nFinal Status: {stats['overall_status']}")

        # Upload results
        try:
            self.upload_results(
                test_results=test_results,
                stats=stats,
                test_type="functional",
                output_dir=str(self.script_dir.parent / "results"),
                extra_metadata={
                    "total_tests": stats["total"],
                    "passed_tests": stats["passed"],
                    "failed_tests": stats["failed"],
                    "error_tests": stats["error"],
                    "skipped_tests": stats["skipped"],
                },
            )
        except Exception as e:
            log.warning(f"Could not upload results: {e}")

        # Write to GitHub Actions step summary
        try:
            gha_append_step_summary(
                f"## {self.display_name} - Functional Test Results\n\n"
                f"```\n{summary_table}\n```\n"
            )
        except Exception as e:
            log.error(f"Could not write GitHub Actions summary: {e}")

        # Raise exception if tests failed
        if stats["overall_status"] != "PASS":
            failed = stats["failed"]
            errored = stats["error"]
            total = stats["total"]
            raise TestResultError(
                f"Test suite completed with failures: "
                f"{failed} failed, {errored} errors out of {total} total tests"
            )


def run_functional_main(test_instance):
    """Run functional test.

    Raises exceptions on failure, returns normally on success.
    - Success: Returns normally → exit code 0
    - Execution Error: Raises TestExecutionError → exit code 1
    - Result Failure: Raises TestResultError → exit code 1
    """
    test_instance.run()