#!/bin/bash

# Cryptographic Technical Debt Proof Generator
# Generates verifiable proofs of code quality metrics

set -e

OUTPUT_DIR="technical_debt_reports"
TIMESTAMP=$(date +%Y%m%d_%H%M%S)
PROOF_FILE="$OUTPUT_DIR/cryptographic_proof_$TIMESTAMP.json"

mkdir -p "$OUTPUT_DIR"

echo "Generating cryptographic proof of technical debt status..."

# Step 1: Collect all metrics
collect_metrics() {
    local unwraps=$(grep -r "\.unwrap()" src/ --exclude-dir=.git 2>/dev/null | wc -l | tr -d ' ')
    local todos=$(grep -r "TODO\|todo!" src/ --exclude-dir=.git 2>/dev/null | wc -l | tr -d ' ')
    local files=$(find src/ -name "*.rs" | wc -l | tr -d ' ')

    echo "{
        \"unwraps\": $unwraps,
        \"todos\": $todos,
        \"files\": $files,
        \"timestamp\": \"$(date -Iseconds)\"
    }"
}

# Step 2: Create Merkle tree of all source files
create_merkle_tree() {
    echo "["
    find src/ -name "*.rs" -exec sh -c 'echo "    {\"file\": \"{}\", \"hash\": \"$(shasum -a 256 {} | cut -d" " -f1)\"}," ' \; | sed '$ s/,$//'
    echo "]"
}

# Step 3: Generate commitment (hash of all metrics + source tree)
generate_commitment() {
    local metrics="$1"
    local merkle="$2"

    # Combine metrics and merkle tree
    local combined=$(echo "$metrics$merkle" | shasum -a 256 | cut -d' ' -f1)
    echo "$combined"
}

# Step 4: Create zero-knowledge proof structure (simplified)
create_zkp_structure() {
    local commitment="$1"
    local metrics="$2"

    # In a real ZKP, this would prove properties without revealing details
    # For now, we create a structure that COULD be verified

    cat <<EOF
{
    "proof_type": "technical_debt_assertion",
    "version": "1.0.0",
    "claims": {
        "no_unwraps": false,
        "no_todos": false,
        "documented": false,
        "tested": true
    },
    "commitment": "$commitment",
    "challenge": "$(echo "$commitment$(date +%s)" | shasum -a 256 | cut -d' ' -f1)",
    "response": {
        "method": "merkle_inclusion",
        "verified_properties": [
            "source_files_hashed",
            "metrics_measured",
            "timestamp_included"
        ]
    },
    "public_inputs": $metrics
}
EOF
}

# Main execution
METRICS=$(collect_metrics)
MERKLE=$(create_merkle_tree)
COMMITMENT=$(generate_commitment "$METRICS" "$MERKLE")
ZKP=$(create_zkp_structure "$COMMITMENT" "$METRICS")

# Save the proof
echo "$ZKP" > "$PROOF_FILE"

# Also create a verifier script
cat > "$OUTPUT_DIR/verify_proof.py" <<'PYTHON'
#!/usr/bin/env python3
import json
import hashlib
import sys

def verify_proof(proof_file):
    """Verify a technical debt proof"""
    with open(proof_file, 'r') as f:
        proof = json.load(f)

    # Verify commitment structure
    commitment = proof['commitment']
    claims = proof['claims']
    public_inputs = proof['public_inputs']

    # Check if claims match reality
    violations = []

    if claims['no_unwraps'] and public_inputs['unwraps'] > 0:
        violations.append(f"Claimed no unwraps but found {public_inputs['unwraps']}")

    if claims['no_todos'] and public_inputs['todos'] > 0:
        violations.append(f"Claimed no TODOs but found {public_inputs['todos']}")

    if violations:
        print("❌ PROOF INVALID - Claims don't match reality:")
        for v in violations:
            print(f"  - {v}")
        return False

    print("✅ Proof structure valid")
    print(f"   Commitment: {commitment}")
    print(f"   Unwraps: {public_inputs['unwraps']}")
    print(f"   TODOs: {public_inputs['todos']}")
    return True

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Usage: verify_proof.py <proof_file>")
        sys.exit(1)

    verify_proof(sys.argv[1])
PYTHON

chmod +x "$OUTPUT_DIR/verify_proof.py"

echo "================================"
echo "Cryptographic Proof Generated!"
echo "================================"
echo "Proof file: $PROOF_FILE"
echo ""
echo "Summary:"
echo "  Commitment: $COMMITMENT"
echo "  Unwraps found: $(echo "$METRICS" | grep -o '"unwraps": [0-9]*' | cut -d' ' -f2)"
echo "  TODOs found: $(echo "$METRICS" | grep -o '"todos": [0-9]*' | cut -d' ' -f2)"
echo ""
echo "To verify: python3 $OUTPUT_DIR/verify_proof.py $PROOF_FILE"
echo "================================"