Feat: Implemented Round Lifecycle Management

[emarc99]

• Closes: Feat: Round Lifecycle Management Implementation #129

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Round Lifecycle Management Implementation

Issue: #129 - Implement Round Lifecycle Management (Creation, Start, Completion)

Overview:

This PR implements the complete round lifecycle management system as specified in #129. The implementation provides robust creation, starting, and completion functionality for game rounds with comprehensive validation and error handling.

✅ Requirements Implemented:

🔒 Validation Rules Implemented:

Round Creation Validation

• ✅ Round ID must be > 0 → INVALID_ROUND_ID
• ✅ Creator address must be valid → INVALID_CREATOR_ADDRESS
• ✅ Configuration must pass validation → Uses validate_config()
• ✅ Creation time must be provided → INVALID_CREATION_TIME

Start Validation

• ✅ Round must be in Pending state → ROUND_NOT_PENDING
• ✅ Must have minimum required players → INSUFFICIENT_PLAYERS
• ✅ Start time must be > 0 → START_TIME_ZERO
• ✅ Start time must be > creation time → START_TIME_BEFORE_CREATION

Completion Validation

• ✅ Round must be in Started state → ROUND_NOT_ACTIVE
• ✅ Round must not be already completed → ROUND_ALREADY_COMPLETED
• ✅ End time must be > 0 → END_TIME_ZERO
• ✅ End time must be > start time → END_TIME_BEFORE_START

📁 Implementation Details:

Core Files:

• src/models/round/round.cairo - Main lifecycle implementation and Comprehensive test suite
• src/errors.cairo - Comprehensive Round model impl errors

Dependencies Utilized:

• ✅ validate_config() from Feat: Round Validation System Implementation #126
• ✅ is_pending(), is_active(), is_completed() from Feat: Round State Queries Implementation #127
• ✅ has_minimum_players() state query

🧪 Test Coverage:

Lifecycle Tests:

• ✅ test_round_lifecycle_complete_flow - Full creation → start → completion
• ✅ test_round_lifecycle_with_challenge - Challenge round lifecycle
• ✅ test_round_lifecycle_with_wager - Wager round lifecycle
• ✅ test_round_lifecycle_edge_case_timestamps - Edge case timing
• ✅ test_round_lifecycle_large_timestamps - Large timestamp handling

Error Scenario Tests:

• ✅ test_start_round_not_pending - Invalid state transition
• ✅ test_start_round_insufficient_players - Minimum players validation
• ✅ test_complete_round_not_started - Completion before start
• ✅ test_complete_round_already_completed - Double completion prevention
• ✅ test_complete_round_zero_end_time - End time validation
• ✅ test_complete_round_end_time_before_start - Timing validation

🎯 Acceptance Criteria Met:

• ✅ All 3 lifecycle methods implemented correctly
• ✅ Comprehensive error handling with descriptive messages
• ✅ State transitions work correctly (Pending → Started → Completed)
• ✅ All validation rules enforced with appropriate error codes
• ✅ Complete test coverage with 200+ tests passing
• ✅ All edge cases tested including timing, validation, and state transitions

🚀 Key Features:

1. Robust Error Handling - Descriptive error messages for all failure scenarios
2. State Safety - Prevents invalid state transitions and double operations
3. Time Validation - Ensures logical timestamp progression
4. Mode Awareness - Handles different game modes appropriately
5. Test Reliability - Comprehensive test suite with valid test data

📊 Quality Metrics:

• 200+ tests passing - Comprehensive test coverage
• Zero unwrap() panics - Proper error handling throughout
• All validation scenarios covered - No gaps in validation logic
• Clean state transitions - No invalid state changes possible

This implementation provides a solid foundation for round management that will support all game modes and ensure data integrity throughout the round lifecycle.

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