"""
Verification Script: Test Independence

Verifies that each test case can run independently without issues.
Tests each test case in isolation to ensure no dependencies.
"""
import subprocess
import sys
from pathlib import Path

# Test cases to verify
TEST_CASES = [
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_instructions_modal_appears",
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_instructions_modal_dismiss",
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_answer_single_question",
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_answer_multiple_choice_question",
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_answer_true_false_question",
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_answer_rating_scale_question",
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_answer_open_ended_question",
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_answer_matrix_question",
    "tests/student_assessment/test_03_domain_assessment.py::TestDomainAssessment::test_navigate_questions",
    # Note: test_answer_all_questions_in_domain is long-running, test separately
]

def run_test(test_case, timeout=300):
    """Run a single test case"""
    print(f"\n{'='*80}")
    print(f"🧪 Testing: {test_case}")
    print(f"{'='*80}")
    
    cmd = [
        "python", "-m", "pytest",
        test_case,
        "-v",
        "--tb=short"
    ]
    
    try:
        result = subprocess.run(
            cmd,
            cwd=Path(__file__).parent.parent,
            capture_output=True,
            text=True,
            timeout=timeout + 60  # Extra buffer (handled by subprocess, not pytest)
        )
        
        # Check exit code and output
        output = result.stdout + result.stderr
        
        # Parse pytest summary line (last line with test count)
        summary_line = None
        for line in reversed(output.split('\n')):
            if 'passed' in line.lower() or 'failed' in line.lower() or 'skipped' in line.lower() or 'error' in line.lower():
                if any(word in line.lower() for word in ['passed', 'failed', 'skipped', 'error']):
                    summary_line = line
                    break
        
        if result.returncode == 0:
            # Exit code 0 means success (passed or skipped)
            if summary_line:
                # Parse summary line
                if "1 passed" in summary_line.lower() or "passed" in summary_line.lower():
                    print(f"✅ PASSED: {test_case}")
                    return True
                elif "1 skipped" in summary_line.lower() or "skipped" in summary_line.lower():
                    print(f"⏭️  SKIPPED: {test_case}")
                    # Extract skip reason
                    skip_lines = [line for line in output.split('\n') if 'SKIPPED' in line and '(' in line]
                    if skip_lines:
                        print(f"   Reason: {skip_lines[-1].strip()}")
                    return True
                else:
                    # Check for PASSED in output
                    if "PASSED" in output:
                        print(f"✅ PASSED: {test_case}")
                        return True
                    elif "SKIPPED" in output:
                        print(f"⏭️  SKIPPED: {test_case}")
                        skip_lines = [line for line in output.split('\n') if 'SKIPPED' in line and '(' in line]
                        if skip_lines:
                            print(f"   Reason: {skip_lines[-1].strip()}")
                        return True
                    else:
                        print(f"✅ PASSED: {test_case} (exit code 0)")
                        return True
            else:
                # No summary line, check for PASSED/SKIPPED keywords
                if "PASSED" in output:
                    print(f"✅ PASSED: {test_case}")
                    return True
                elif "SKIPPED" in output:
                    print(f"⏭️  SKIPPED: {test_case}")
                    skip_lines = [line for line in output.split('\n') if 'SKIPPED' in line and '(' in line]
                    if skip_lines:
                        print(f"   Reason: {skip_lines[-1].strip()}")
                    return True
                else:
                    # Exit code 0 but no clear status - assume passed
                    print(f"✅ PASSED: {test_case} (exit code 0, no clear status)")
                    return True
        else:
            # Non-zero exit code = failure
            print(f"❌ FAILED: {test_case} (exit code {result.returncode})")
            # Show relevant error section
            if "FAILED" in output:
                error_section = output.split("FAILED")[-1]
                print(f"Failure details:\n{error_section[:600]}")
            elif "ERROR" in output:
                error_section = output.split("ERROR")[-1]
                print(f"Error details:\n{error_section[:600]}")
            else:
                # Show last part of output
                print(f"Output:\n{output[-600:]}")
            return False
    except subprocess.TimeoutExpired:
        print(f"⏱️  TIMEOUT: {test_case} (exceeded {timeout}s)")
        return False
    except Exception as e:
        print(f"❌ ERROR: {test_case} - {e}")
        return False

def main():
    """Run all test cases independently"""
    print("🚀 Starting Test Independence Verification")
    print(f"📋 Total test cases: {len(TEST_CASES)}")
    
    results = []
    for test_case in TEST_CASES:
        success = run_test(test_case)
        results.append((test_case, success))
    
    # Summary
    print(f"\n{'='*80}")
    print("📊 VERIFICATION SUMMARY")
    print(f"{'='*80}")
    
    passed = sum(1 for _, success in results if success)
    failed = len(results) - passed
    
    for test_case, success in results:
        status = "✅ PASSED" if success else "❌ FAILED"
        print(f"{status}: {test_case}")
    
    print(f"\n📈 Results: {passed}/{len(results)} passed ({failed} failed)")
    
    if passed == len(results):
        print("🎉 All tests can run independently!")
        return 0
    else:
        print("⚠️  Some tests failed - review above for details")
        return 1

if __name__ == "__main__":
    sys.exit(main())