asupersync-conformance 0.3.1

//! Example RFC 6330 Conformance Tests
//!
//! This module contains proof-of-concept conformance tests demonstrating
//! the ConformanceTest trait implementation for P0 priority requirements.

use crate::raptorq_rfc6330::{
    ConformanceContext, ConformanceResult, ConformanceTest, RequirementLevel, TestCategory,
};

// ============================================================================
// P0 Priority Tests - Critical Requirements
// ============================================================================

/// Test RFC 6330 Section 5.5.1 - Lookup table V0 validation
pub struct LookupTableV0Test;

impl ConformanceTest for LookupTableV0Test {
    fn rfc_clause(&self) -> &str {
        "RFC6330-5.5.1"
    }

    fn section(&self) -> &str {
        "5.5"
    }

    fn requirement_level(&self) -> RequirementLevel {
        RequirementLevel::Must
    }

    fn category(&self) -> TestCategory {
        TestCategory::Unit
    }

    fn description(&self) -> &str {
        "Lookup table V0 MUST match RFC 6330 values exactly"
    }

    fn run(&self, _ctx: &ConformanceContext) -> ConformanceResult {
        // TODO: Implement actual validation against RFC 6330 V0 table
        // This is a placeholder demonstrating the test structure

        // Load RFC reference values (would be from RFC 6330 Section 5.5)
        let _rfc_v0_sample = [251291136u32, 3952231631, 3370958628]; // First 3 values from RFC

        // TODO: Compare with actual implementation
        // For now, return a placeholder result
        ConformanceResult::Skipped {
            reason: "V0 table validation not yet implemented - requires integration with actual RaptorQ module".to_string(),
        }

        // When implemented, this would look like:
        // for (i, &expected) in rfc_v0_sample.iter().enumerate() {
        //     let actual = crate::raptorq::rfc6330::V0[i];
        //     if actual != expected {
        //         return ConformanceResult::Fail {
        //             reason: format!("V0[{i}] mismatch"),
        //             details: Some(format!("expected: {expected}, actual: {actual}")),
        //         };
        //     }
        // }
        // ConformanceResult::Pass
    }

    fn tags(&self) -> Vec<&str> {
        vec!["p0", "lookup-tables", "critical"]
    }
}

/// Test RFC 6330 Section 5.5.1 - Lookup table V1 validation
pub struct LookupTableV1Test;

impl ConformanceTest for LookupTableV1Test {
    fn rfc_clause(&self) -> &str {
        "RFC6330-5.5.1-V1"
    }

    fn section(&self) -> &str {
        "5.5"
    }

    fn requirement_level(&self) -> RequirementLevel {
        RequirementLevel::Must
    }

    fn category(&self) -> TestCategory {
        TestCategory::Unit
    }

    fn description(&self) -> &str {
        "Lookup table V1 MUST match RFC 6330 values exactly"
    }

    fn run(&self, _ctx: &ConformanceContext) -> ConformanceResult {
        // TODO: Implement actual validation against RFC 6330 V1 table
        ConformanceResult::Skipped {
            reason: "V1 table validation not yet implemented - requires integration with actual RaptorQ module".to_string(),
        }
    }

    fn tags(&self) -> Vec<&str> {
        vec!["p0", "lookup-tables", "critical"]
    }
}

/// Test RFC 6330 Section 5.1.1 - Systematic index calculation
pub struct SystematicIndexTest;

impl ConformanceTest for SystematicIndexTest {
    fn rfc_clause(&self) -> &str {
        "RFC6330-5.1.1"
    }

    fn section(&self) -> &str {
        "5.1"
    }

    fn requirement_level(&self) -> RequirementLevel {
        RequirementLevel::Must
    }

    fn category(&self) -> TestCategory {
        TestCategory::Unit
    }

    fn description(&self) -> &str {
        "Systematic index J(K) MUST be calculated according to RFC Table 2"
    }

    fn run(&self, _ctx: &ConformanceContext) -> ConformanceResult {
        // TODO: Implement systematic index validation
        // This would test against RFC Table 2 values

        ConformanceResult::Skipped {
            reason: "Systematic index validation not yet implemented - requires RFC Table 2 reference data".to_string(),
        }

        // When implemented:
        // let test_cases = [
        //     (1, 0),     // K=1, J(K)=0
        //     (2, 1),     // K=2, J(K)=1
        //     (4, 2),     // K=4, J(K)=2
        //     // ... more test cases from RFC Table 2
        // ];
        //
        // for (k, expected_j) in test_cases {
        //     let actual_j = calculate_systematic_index(k);
        //     if actual_j != expected_j {
        //         return ConformanceResult::Fail {
        //             reason: format!("Systematic index mismatch for K={k}"),
        //             details: Some(format!("expected J({k})={expected_j}, got {actual_j}")),
        //         };
        //     }
        // }
        // ConformanceResult::Pass
    }

    fn tags(&self) -> Vec<&str> {
        vec!["p0", "parameters", "systematic-index", "critical"]
    }
}

/// Test RFC 6330 Section 5.3.1 - Systematic tuple generation
pub struct SystematicTupleGenerationTest;

impl ConformanceTest for SystematicTupleGenerationTest {
    fn rfc_clause(&self) -> &str {
        "RFC6330-5.3.1"
    }

    fn section(&self) -> &str {
        "5.3"
    }

    fn requirement_level(&self) -> RequirementLevel {
        RequirementLevel::Must
    }

    fn category(&self) -> TestCategory {
        TestCategory::Differential
    }

    fn description(&self) -> &str {
        "Systematic symbol tuples (d, a, b) MUST be generated using RFC algorithm"
    }

    fn run(&self, ctx: &ConformanceContext) -> ConformanceResult {
        if !ctx.enable_differential {
            return ConformanceResult::Skipped {
                reason: "Differential testing disabled - no reference implementation available"
                    .to_string(),
            };
        }

        // TODO: Implement differential testing against reference implementation
        ConformanceResult::Skipped {
            reason: "Systematic tuple generation differential testing not yet implemented"
                .to_string(),
        }

        // When implemented with reference implementation:
        // for k in [4, 8, 16, 32, 64] {
        //     for esi in 0..k {
        //         let (d, a, b) = our_systematic_tuple_generation(k, esi);
        //         let (ref_d, ref_a, ref_b) = reference_systematic_tuple_generation(k, esi);
        //
        //         if (d, a, b) != (ref_d, ref_a, ref_b) {
        //             return ConformanceResult::Fail {
        //                 reason: format!("Systematic tuple mismatch for K={k}, ESI={esi}"),
        //                 details: Some(format!(
        //                     "our: ({d}, {a}, {b}), reference: ({ref_d}, {ref_a}, {ref_b})"
        //                 )),
        //             };
        //         }
        //     }
        // }
        // ConformanceResult::Pass
    }

    fn dependencies(&self) -> Vec<&str> {
        vec!["RFC6330-5.5.1", "RFC6330-5.1.1"] // Depends on lookup tables and systematic index
    }

    fn tags(&self) -> Vec<&str> {
        vec!["p0", "tuple-generation", "differential", "critical"]
    }
}

/// Test RFC 6330 Section 5.3.2 - Repair tuple generation
pub struct RepairTupleGenerationTest;

impl ConformanceTest for RepairTupleGenerationTest {
    fn rfc_clause(&self) -> &str {
        "RFC6330-5.3.2"
    }

    fn section(&self) -> &str {
        "5.3"
    }

    fn requirement_level(&self) -> RequirementLevel {
        RequirementLevel::Must
    }

    fn category(&self) -> TestCategory {
        TestCategory::Differential
    }

    fn description(&self) -> &str {
        "Repair symbol tuples (d1, a1, b1) MUST be generated using RFC algorithm"
    }

    fn run(&self, ctx: &ConformanceContext) -> ConformanceResult {
        if !ctx.enable_differential {
            return ConformanceResult::Skipped {
                reason: "Differential testing disabled - no reference implementation available"
                    .to_string(),
            };
        }

        // TODO: Implement differential testing for repair tuple generation
        ConformanceResult::Skipped {
            reason: "Repair tuple generation differential testing not yet implemented".to_string(),
        }
    }

    fn dependencies(&self) -> Vec<&str> {
        vec!["RFC6330-5.5.1", "RFC6330-5.1.1"] // Depends on lookup tables and systematic index
    }

    fn tags(&self) -> Vec<&str> {
        vec![
            "p0",
            "tuple-generation",
            "differential",
            "repair-symbols",
            "critical",
        ]
    }
}

// ============================================================================
// P1 Priority Tests - High Priority Requirements
// ============================================================================

/// Test RFC 6330 Section 4.1.2 - K parameter derivation
pub struct KParameterDerivationTest;

impl ConformanceTest for KParameterDerivationTest {
    fn rfc_clause(&self) -> &str {
        "RFC6330-4.1.2"
    }

    fn section(&self) -> &str {
        "4.1"
    }

    fn requirement_level(&self) -> RequirementLevel {
        RequirementLevel::Must
    }

    fn category(&self) -> TestCategory {
        TestCategory::Unit
    }

    fn description(&self) -> &str {
        "K source symbols MUST be correctly derived from object size and symbol size"
    }

    fn run(&self, _ctx: &ConformanceContext) -> ConformanceResult {
        // TODO: Implement K derivation validation
        ConformanceResult::Skipped {
            reason: "K parameter derivation validation not yet implemented".to_string(),
        }

        // When implemented:
        // let test_cases = [
        //     (1024, 64, 16),     // 1KB object, 64-byte symbols, expect K=16
        //     (4096, 256, 16),    // 4KB object, 256-byte symbols, expect K=16
        //     (65536, 1024, 64),  // 64KB object, 1024-byte symbols, expect K=64
        // ];
        //
        // for (object_size, symbol_size, expected_k) in test_cases {
        //     let actual_k = derive_k(object_size, symbol_size);
        //     if actual_k != expected_k {
        //         return ConformanceResult::Fail {
        //             reason: format!("K derivation incorrect for {object_size}B object with {symbol_size}B symbols"),
        //             details: Some(format!("expected K={expected_k}, got K={actual_k}")),
        //         };
        //     }
        // }
        // ConformanceResult::Pass
    }

    fn tags(&self) -> Vec<&str> {
        vec!["p1", "parameters", "k-derivation"]
    }
}

// ============================================================================
// Test Registry Helper
// ============================================================================

/// Get all example conformance tests for registration
pub fn get_all_example_tests() -> Vec<Box<dyn ConformanceTest>> {
    vec![
        // P0 Tests
        Box::new(LookupTableV0Test),
        Box::new(LookupTableV1Test),
        Box::new(SystematicIndexTest),
        Box::new(SystematicTupleGenerationTest),
        Box::new(RepairTupleGenerationTest),
        // P1 Tests
        Box::new(KParameterDerivationTest),
    ]
}

/// Get P0 priority tests only (critical requirements)
pub fn get_p0_tests() -> Vec<Box<dyn ConformanceTest>> {
    vec![
        Box::new(LookupTableV0Test),
        Box::new(LookupTableV1Test),
        Box::new(SystematicIndexTest),
        Box::new(SystematicTupleGenerationTest),
        Box::new(RepairTupleGenerationTest),
    ]
}

/// Get tests by section
pub fn get_section_tests(section: &str) -> Vec<Box<dyn ConformanceTest>> {
    let all_tests = get_all_example_tests();
    all_tests
        .into_iter()
        .filter(|test| test.section() == section)
        .collect()
}

/// Get tests by requirement level
pub fn get_level_tests(level: RequirementLevel) -> Vec<Box<dyn ConformanceTest>> {
    let all_tests = get_all_example_tests();
    all_tests
        .into_iter()
        .filter(|test| test.requirement_level() == level)
        .collect()
}