#!/usr/bin/env python3

"""
Property Test Upgrade Script
Sprint 88 Follow-up: Upgrade placeholder tests to meaningful property tests

This script identifies placeholder property tests and provides templates
for upgrading them to meaningful tests based on the module context.
"""

import os
import re
import sys
import argparse
from pathlib import Path
from typing import List, Dict, Tuple, Optional
from dataclasses import dataclass
import json

@dataclass
class TestUpgradeCandidate:
    """Represents a file with placeholder tests that can be upgraded"""
    file_path: Path
    module_type: str
    current_test: str
    suggested_upgrade: str
    priority: int  # 1-5, with 1 being highest priority

class PropertyTestUpgrader:
    """Upgrades placeholder property tests to meaningful ones"""
    
    def __init__(self, base_path: str = "server/src"):
        self.base_path = Path(base_path)
        self.placeholder_pattern = re.compile(r'prop_assert!\(true\)')
        self.module_patterns = self.load_module_patterns()
        
    def load_module_patterns(self) -> Dict[str, Dict]:
        """Load patterns for different module types"""
        return {
            "parser": {
                "keywords": ["parse", "lexer", "tokenize", "syntax"],
                "template": self.get_parser_template(),
                "priority": 1
            },
            "analyzer": {
                "keywords": ["analyze", "detect", "calculate", "measure"],
                "template": self.get_analyzer_template(),
                "priority": 1
            },
            "serializer": {
                "keywords": ["serialize", "deserialize", "encode", "decode", "json", "toml"],
                "template": self.get_serializer_template(),
                "priority": 2
            },
            "validator": {
                "keywords": ["validate", "check", "verify", "ensure"],
                "template": self.get_validator_template(),
                "priority": 2
            },
            "transformer": {
                "keywords": ["transform", "convert", "refactor", "modify"],
                "template": self.get_transformer_template(),
                "priority": 3
            },
            "builder": {
                "keywords": ["build", "create", "construct", "generate"],
                "template": self.get_builder_template(),
                "priority": 3
            },
            "model": {
                "keywords": ["model", "struct", "enum", "type"],
                "template": self.get_model_template(),
                "priority": 4
            },
            "service": {
                "keywords": ["service", "handler", "manager", "controller"],
                "template": self.get_service_template(),
                "priority": 4
            },
            "utility": {
                "keywords": ["util", "helper", "common", "shared"],
                "template": self.get_utility_template(),
                "priority": 5
            }
        }
    
    def find_placeholder_tests(self) -> List[Path]:
        """Find all files with placeholder property tests"""
        placeholder_files = []
        
        for rust_file in self.base_path.rglob("*.rs"):
            if rust_file.is_file():
                content = rust_file.read_text()
                if self.placeholder_pattern.search(content):
                    placeholder_files.append(rust_file)
        
        return placeholder_files
    
    def identify_module_type(self, file_path: Path) -> str:
        """Identify the type of module based on file name and content"""
        file_name = file_path.stem.lower()
        content = file_path.read_text().lower()[:1000]  # Check first 1000 chars
        
        # Check each module pattern
        best_match = "utility"  # Default
        best_score = 0
        
        for module_type, pattern_info in self.module_patterns.items():
            score = 0
            for keyword in pattern_info["keywords"]:
                if keyword in file_name:
                    score += 2  # File name match is stronger
                if keyword in content:
                    score += 1
            
            if score > best_score:
                best_score = score
                best_match = module_type
        
        return best_match
    
    def generate_upgrade_suggestion(self, file_path: Path) -> TestUpgradeCandidate:
        """Generate an upgrade suggestion for a file with placeholder tests"""
        module_type = self.identify_module_type(file_path)
        pattern_info = self.module_patterns[module_type]
        
        # Extract current test structure
        content = file_path.read_text()
        current_test = self.extract_current_test(content)
        
        # Generate suggested upgrade based on module type
        suggested_upgrade = pattern_info["template"].format(
            module_name=file_path.stem
        )
        
        return TestUpgradeCandidate(
            file_path=file_path,
            module_type=module_type,
            current_test=current_test,
            suggested_upgrade=suggested_upgrade,
            priority=pattern_info["priority"]
        )
    
    def extract_current_test(self, content: str) -> str:
        """Extract the current placeholder test from file content"""
        # Find the property test module
        match = re.search(
            r'(proptest!\s*\{[^}]*prop_assert!\(true\)[^}]*\})',
            content,
            re.DOTALL
        )
        
        if match:
            return match.group(1)
        
        return "// No property test found"
    
    def apply_upgrade(self, candidate: TestUpgradeCandidate, dry_run: bool = True) -> bool:
        """Apply the upgrade to the file"""
        if dry_run:
            print(f"Would upgrade: {candidate.file_path}")
            return True
        
        try:
            content = candidate.file_path.read_text()
            
            # Replace placeholder test with meaningful test
            updated_content = content.replace(
                candidate.current_test,
                candidate.suggested_upgrade
            )
            
            candidate.file_path.write_text(updated_content)
            return True
        except Exception as e:
            print(f"Error upgrading {candidate.file_path}: {e}")
            return False
    
    # Template methods for different module types
    def get_parser_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn parse_valid_input_succeeds(
            input in valid_{module_name}_input()
        ) {{
            let result = parse_{module_name}(&input);
            prop_assert!(result.is_ok());
        }}

        #[test]
        fn parse_format_roundtrip(
            input in valid_{module_name}_input()
        ) {{
            let parsed = parse_{module_name}(&input).unwrap();
            let formatted = format_{module_name}(&parsed);
            let reparsed = parse_{module_name}(&formatted).unwrap();
            prop_assert_eq!(parsed, reparsed);
        }}

        #[test]
        fn parser_never_panics(input in ".*") {{
            // Parser should handle any input without panicking
            let _ = parse_{module_name}_safe(&input);
        }}
    }}

    fn valid_{module_name}_input() -> impl Strategy<Value = String> {{
        "[a-zA-Z][a-zA-Z0-9_]*"
    }}'''
    
    def get_analyzer_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn analysis_deterministic(
            input in arbitrary_input()
        ) {{
            let result1 = analyze(&input);
            let result2 = analyze(&input);
            prop_assert_eq!(result1, result2);
        }}

        #[test]
        fn analysis_bounds_check(
            input in arbitrary_input()
        ) {{
            let result = analyze(&input);
            prop_assert!(result.score >= 0.0);
            prop_assert!(result.score <= 100.0);
        }}

        #[test]
        fn analysis_never_panics(input in ".*") {{
            let _ = analyze_safe(&input);
        }}
    }}'''
    
    def get_serializer_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn serialize_deserialize_roundtrip(
            value in arbitrary_{module_name}()
        ) {{
            let serialized = serde_json::to_string(&value)?;
            let deserialized = serde_json::from_str(&serialized)?;
            prop_assert_eq!(value, deserialized);
        }}

        #[test]
        fn serialization_never_panics(
            value in arbitrary_{module_name}()
        ) {{
            let _ = serde_json::to_string(&value);
        }}
    }}'''
    
    def get_validator_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn valid_input_passes_validation(
            input in valid_{module_name}_input()
        ) {{
            prop_assert!(validate_{module_name}(&input).is_ok());
        }}

        #[test]
        fn invalid_input_fails_validation(
            input in invalid_{module_name}_input()
        ) {{
            prop_assert!(validate_{module_name}(&input).is_err());
        }}

        #[test]
        fn validator_never_panics(input in ".*") {{
            let _ = validate_{module_name}(&input);
        }}
    }}'''
    
    def get_transformer_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn transform_preserves_invariants(
            input in arbitrary_input()
        ) {{
            let transformed = transform(&input);
            prop_assert!(verify_invariants(&input, &transformed));
        }}

        #[test]
        fn transform_idempotent(
            input in arbitrary_input()
        ) {{
            let once = transform(&input);
            let twice = transform(&once);
            prop_assert_eq!(once, twice);
        }}
    }}'''
    
    def get_builder_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn builder_creates_valid_objects(
            params in arbitrary_build_params()
        ) {{
            let result = Builder::new()
                .with_params(params)
                .build();
            prop_assert!(result.is_ok());
            prop_assert!(result.unwrap().is_valid());
        }}

        #[test]
        fn builder_defaults_are_valid() {{
            let result = Builder::default().build();
            prop_assert!(result.is_ok());
        }}
    }}'''
    
    def get_model_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn model_equality_is_reflexive(
            model in arbitrary_{module_name}()
        ) {{
            prop_assert_eq!(&model, &model);
        }}

        #[test]
        fn model_clone_equals_original(
            model in arbitrary_{module_name}()
        ) {{
            let cloned = model.clone();
            prop_assert_eq!(model, cloned);
        }}

        #[test]
        fn model_hash_deterministic(
            model in arbitrary_{module_name}()
        ) {{
            use std::collections::hash_map::DefaultHasher;
            use std::hash::{{Hash, Hasher}};
            
            let mut hasher1 = DefaultHasher::new();
            model.hash(&mut hasher1);
            let hash1 = hasher1.finish();
            
            let mut hasher2 = DefaultHasher::new();
            model.hash(&mut hasher2);
            let hash2 = hasher2.finish();
            
            prop_assert_eq!(hash1, hash2);
        }}
    }}'''
    
    def get_service_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn service_handles_concurrent_requests(
            requests in prop::collection::vec(arbitrary_request(), 1..10)
        ) {{
            let service = Service::new();
            let results: Vec<_> = requests.iter()
                .map(|req| service.handle(req))
                .collect();
            
            for result in results {{
                prop_assert!(result.is_ok());
            }}
        }}

        #[test]
        fn service_state_consistent(
            operations in prop::collection::vec(arbitrary_operation(), 1..20)
        ) {{
            let mut service = Service::new();
            
            for op in operations {{
                service.execute(op);
                prop_assert!(service.verify_state_consistency());
            }}
        }}
    }}'''
    
    def get_utility_template(self) -> str:
        return '''proptest! {{
        #[test]
        fn utility_function_deterministic(
            input in arbitrary_input()
        ) {{
            let result1 = utility_function(&input);
            let result2 = utility_function(&input);
            prop_assert_eq!(result1, result2);
        }}

        #[test]
        fn utility_handles_edge_cases(
            size in 0usize..10000
        ) {{
            let input = generate_input(size);
            let result = utility_function(&input);
            prop_assert!(result.is_valid());
        }}
    }}'''
    
    def generate_report(self, candidates: List[TestUpgradeCandidate], format: str = "terminal"):
        """Generate a report of upgrade candidates"""
        if format == "json":
            self.generate_json_report(candidates)
        elif format == "markdown":
            self.generate_markdown_report(candidates)
        else:
            self.generate_terminal_report(candidates)
    
    def generate_terminal_report(self, candidates: List[TestUpgradeCandidate]):
        """Generate terminal-formatted report"""
        print("\n" + "="*60)
        print("PROPERTY TEST UPGRADE CANDIDATES")
        print("="*60)
        print(f"\nFound {len(candidates)} files with placeholder tests\n")
        
        # Group by priority
        by_priority = {}
        for candidate in candidates:
            priority = candidate.priority
            if priority not in by_priority:
                by_priority[priority] = []
            by_priority[priority].append(candidate)
        
        for priority in sorted(by_priority.keys()):
            priority_candidates = by_priority[priority]
            print(f"\n{'⭐' * (6 - priority)} Priority {priority} ({len(priority_candidates)} files)")
            print("-" * 40)
            
            for candidate in priority_candidates[:5]:  # Show top 5 per priority
                rel_path = candidate.file_path.relative_to(self.base_path)
                print(f"  📁 {rel_path}")
                print(f"     Type: {candidate.module_type}")
                print(f"     Upgrade: Add {candidate.module_type}-specific property tests")
            
            if len(priority_candidates) > 5:
                print(f"  ... and {len(priority_candidates) - 5} more")
    
    def generate_markdown_report(self, candidates: List[TestUpgradeCandidate]):
        """Generate markdown-formatted report"""
        print("# Property Test Upgrade Report\n")
        print(f"**Total Files**: {len(candidates)}\n")
        print(f"**Date**: {__import__('datetime').datetime.now().isoformat()}\n")
        
        # Statistics by module type
        by_type = {}
        for candidate in candidates:
            module_type = candidate.module_type
            if module_type not in by_type:
                by_type[module_type] = 0
            by_type[module_type] += 1
        
        print("## Statistics by Module Type\n")
        print("| Module Type | Count | Priority |")
        print("|------------|-------|----------|")
        for module_type in sorted(by_type.keys()):
            priority = self.module_patterns[module_type]["priority"]
            print(f"| {module_type} | {by_type[module_type]} | {priority} |")
        
        print("\n## Top Priority Upgrades\n")
        
        # Show top candidates
        sorted_candidates = sorted(candidates, key=lambda c: (c.priority, str(c.file_path)))
        for candidate in sorted_candidates[:20]:
            rel_path = candidate.file_path.relative_to(self.base_path)
            print(f"- [ ] `{rel_path}` ({candidate.module_type})")
    
    def generate_json_report(self, candidates: List[TestUpgradeCandidate]):
        """Generate JSON-formatted report"""
        report = {
            "total_files": len(candidates),
            "timestamp": __import__('datetime').datetime.now().isoformat(),
            "candidates": []
        }
        
        for candidate in candidates:
            report["candidates"].append({
                "file": str(candidate.file_path.relative_to(self.base_path)),
                "module_type": candidate.module_type,
                "priority": candidate.priority
            })
        
        print(json.dumps(report, indent=2))

def main():
    parser = argparse.ArgumentParser(
        description="Upgrade placeholder property tests to meaningful ones"
    )
    parser.add_argument(
        "--path",
        default="server/src",
        help="Base path to search for Rust files"
    )
    parser.add_argument(
        "--format",
        choices=["terminal", "markdown", "json"],
        default="terminal",
        help="Output format for the report"
    )
    parser.add_argument(
        "--apply",
        action="store_true",
        help="Actually apply the upgrades (default is dry-run)"
    )
    parser.add_argument(
        "--limit",
        type=int,
        default=0,
        help="Limit number of files to upgrade (0 = no limit)"
    )
    parser.add_argument(
        "--priority",
        type=int,
        choices=[1, 2, 3, 4, 5],
        help="Only upgrade files with this priority or higher"
    )
    
    args = parser.parse_args()
    
    upgrader = PropertyTestUpgrader(args.path)
    
    # Find placeholder tests
    placeholder_files = upgrader.find_placeholder_tests()
    
    if not placeholder_files:
        print("No placeholder tests found!")
        return
    
    # Generate upgrade candidates
    candidates = []
    for file_path in placeholder_files:
        candidate = upgrader.generate_upgrade_suggestion(file_path)
        
        # Filter by priority if specified
        if args.priority and candidate.priority > args.priority:
            continue
        
        candidates.append(candidate)
    
    # Sort by priority
    candidates.sort(key=lambda c: (c.priority, str(c.file_path)))
    
    # Apply limit if specified
    if args.limit > 0:
        candidates = candidates[:args.limit]
    
    # Generate report
    upgrader.generate_report(candidates, args.format)
    
    # Apply upgrades if requested
    if args.apply:
        print(f"\nApplying upgrades to {len(candidates)} files...")
        success_count = 0
        
        for candidate in candidates:
            if upgrader.apply_upgrade(candidate, dry_run=False):
                success_count += 1
                print(f"✅ Upgraded: {candidate.file_path}")
            else:
                print(f"❌ Failed: {candidate.file_path}")
        
        print(f"\nSuccessfully upgraded {success_count}/{len(candidates)} files")

if __name__ == "__main__":
    main()