#!/bin/bash
# validate_clippy.sh
# Generates a comprehensive clippy validation report
# Shows current state and progress toward goals

set -e
cd "$(dirname "$0")/.."

OUTPUT_FILE="CLIPPY_VALIDATION_REPORT_$(date +%Y%m%d_%H%M%S).md"

echo "Generating clippy validation report..."
echo "This may take 5-10 minutes..."
echo ""

{
echo "# Clippy Validation Report"
echo ""
echo "**Generated**: $(date)"
echo "**Workspace**: $(pwd)"
echo "**Git Branch**: $(git branch --show-current)"
echo "**Git Commit**: $(git rev-parse --short HEAD)"
echo ""
echo "---"
echo ""

echo "## Executive Summary"
echo ""
cargo clippy --workspace --all-targets 2>&1 | tee /tmp/clippy_full.txt > /dev/null

TOTAL_WARNINGS=$(grep -c "warning:" /tmp/clippy_full.txt || echo "0")
ML_WARNINGS=$(grep "^\`ml\`" /tmp/clippy_full.txt | grep "generated" | grep -oP "\d+" | head -1 || echo "0")
COMMON_WARNINGS=$(grep "^\`common\`" /tmp/clippy_full.txt | grep "generated" | grep -oP "\d+" | head -1 || echo "0")

echo "| Metric | Count | Target | Status |"
echo "|--------|-------|--------|--------|"
echo "| **Total Warnings** | $TOTAL_WARNINGS | <100 | $([ $TOTAL_WARNINGS -lt 100 ] && echo "✅" || echo "🔴") |"
echo "| **ML Crate** | $ML_WARNINGS | 0 | $([ $ML_WARNINGS -eq 0 ] && echo "✅" || echo "🔴") |"
echo "| **Common Crate** | $COMMON_WARNINGS | 0 | $([ $COMMON_WARNINGS -eq 0 ] && echo "✅" || echo "🔴") |"
echo ""

echo "---"
echo ""
echo "## Warnings by Crate"
echo ""
echo "| Crate | Warnings | Change | Status |"
echo "|-------|----------|--------|--------|"

grep "generated" /tmp/clippy_full.txt | \
  grep -v "duplicate" | \
  sed 's/warning: `//' | \
  sed 's/` (.*) generated /|/' | \
  sed 's/ warning.*/|/' | \
  sort -t'|' -k2 -rn | \
  while IFS='|' read -r crate count; do
    STATUS="🔴"
    [ "$count" -lt 10 ] && STATUS="🟡"
    [ "$count" -lt 5 ] && STATUS="✅"
    echo "| $crate | $count | - | $STATUS |"
  done

echo ""
echo "---"
echo ""
echo "## Top 20 Warning Categories"
echo ""
echo "| Category | Count | Severity |"
echo "|----------|-------|----------|"

grep "warning:" /tmp/clippy_full.txt | \
  grep -v "generated\|build failed" | \
  sed 's/warning: //' | \
  sort | uniq -c | sort -rn | head -20 | \
  while read count warning; do
    SEVERITY="🟢"
    [[ "$warning" == *"panic"* ]] && SEVERITY="🔴"
    [[ "$warning" == *"unwrap"* ]] && SEVERITY="🔴"
    [[ "$warning" == *"indexing"* ]] && SEVERITY="🔴"
    [[ "$warning" == *"arithmetic"* ]] && SEVERITY="🟡"
    [[ "$warning" == *"overflow"* ]] && SEVERITY="🟡"
    echo "| $warning | $count | $SEVERITY |"
  done

echo ""
echo "---"
echo ""
echo "## Safety-Critical Issues (P0)"
echo ""
echo "These require immediate attention to prevent runtime panics:"
echo ""

echo "### Indexing that may panic"
INDEXING_COUNT=$(grep -c "indexing may panic" /tmp/clippy_full.txt || echo "0")
echo "- **Count**: $INDEXING_COUNT"
echo "- **Risk**: 🔴 HIGH - Can cause service crashes"
echo "- **Fix**: Replace \`array[i]\` with \`array.get(i)?\`"
echo ""

echo "### Unwrap on Result/Option"
UNWRAP_COUNT=$(grep -c "used \`unwrap()\`" /tmp/clippy_full.txt || echo "0")
echo "- **Count**: $UNWRAP_COUNT"
echo "- **Risk**: 🔴 HIGH - Can cause panics"
echo "- **Fix**: Replace with \`?\` operator or proper error handling"
echo ""

echo "### Arithmetic overflow"
ARITHMETIC_COUNT=$(grep -c "arithmetic operation that can potentially result in unexpected side-effects" /tmp/clippy_full.txt || echo "0")
echo "- **Count**: $ARITHMETIC_COUNT"
echo "- **Risk**: 🟡 MEDIUM - Can cause incorrect calculations"
echo "- **Fix**: Use \`.checked_add()\`, \`.checked_mul()\`"
echo ""

CRITICAL_TOTAL=$((INDEXING_COUNT + UNWRAP_COUNT + ARITHMETIC_COUNT))
echo "**Total Critical Issues**: $CRITICAL_TOTAL"
echo ""

echo "---"
echo ""
echo "## Auto-fixable Warnings"
echo ""
echo "These can be fixed with \`cargo clippy --fix\`:"
echo ""

AUTO_FIXABLE=0
grep "run \`cargo clippy --fix" /tmp/clippy_full.txt | wc -l | xargs echo "- **Packages with auto-fixes available**:"
grep "run \`cargo clippy --fix" /tmp/clippy_full.txt | head -10

echo ""
echo "---"
echo ""
echo "## Recommended Actions"
echo ""

if [ $CRITICAL_TOTAL -gt 0 ]; then
    echo "### 🔴 URGENT: Fix Safety-Critical Issues"
    echo ""
    echo "Priority: P0 - Block production deployment"
    echo "Time: 4-6 hours"
    echo ""
    echo "1. Fix indexing panics ($INDEXING_COUNT occurrences)"
    echo "2. Fix unwrap usage ($UNWRAP_COUNT occurrences)"
    echo "3. Fix arithmetic overflow ($ARITHMETIC_COUNT occurrences)"
    echo ""
fi

if [ $TOTAL_WARNINGS -gt 850 ]; then
    echo "### 🟡 Phase 1: Run Auto-fixes"
    echo ""
    echo "Time: 2 hours"
    echo "Expected reduction: ~850 warnings"
    echo ""
    echo "\`\`\`bash"
    echo "./scripts/auto_fix_safe.sh"
    echo "\`\`\`"
    echo ""
fi

if [ $TOTAL_WARNINGS -gt 100 ]; then
    echo "### 🟢 Phase 2: Manual Review"
    echo ""
    echo "Time: 6-10 hours"
    echo "Focus: Safety-critical issues, documentation"
    echo ""
fi

echo "### ✅ Production Readiness"
echo ""
if [ $ML_WARNINGS -eq 0 ] && [ $COMMON_WARNINGS -eq 0 ] && [ $CRITICAL_TOTAL -eq 0 ]; then
    echo "**Status**: ✅ PRODUCTION READY"
    echo ""
    echo "- ML crate: Clean ✅"
    echo "- Common crate: Clean ✅"
    echo "- Critical issues: None ✅"
    echo ""
    echo "Remaining warnings are in non-critical paths and can be addressed post-deployment."
else
    echo "**Status**: 🔴 BLOCKED"
    echo ""
    [ $ML_WARNINGS -gt 0 ] && echo "- ML crate: $ML_WARNINGS warnings 🔴"
    [ $COMMON_WARNINGS -gt 0 ] && echo "- Common crate: $COMMON_WARNINGS warnings 🔴"
    [ $CRITICAL_TOTAL -gt 0 ] && echo "- Critical issues: $CRITICAL_TOTAL 🔴"
fi

echo ""
echo "---"
echo ""
echo "## Historical Progress"
echo ""
echo "| Date | Total Warnings | ML Crate | Common Crate | Notes |"
echo "|------|----------------|----------|--------------|-------|"
echo "| 2025-10 (Historical) | 2,358 | ~100 | ~200 | Pre-Wave D |"
echo "| $(date +%Y-%m-%d) | $TOTAL_WARNINGS | $ML_WARNINGS | $COMMON_WARNINGS | Current |"
REDUCTION=$((2358 - TOTAL_WARNINGS))
PERCENT=$((REDUCTION * 100 / 2358))
echo ""
echo "**Overall Progress**: $REDUCTION warnings fixed ($PERCENT% reduction) since Oct 2025"
echo ""

echo "---"
echo ""
echo "## Full Warning List"
echo ""
echo "See /tmp/clippy_full.txt for complete output"
echo ""
echo "\`\`\`bash"
echo "# View by category"
echo "grep 'warning:' /tmp/clippy_full.txt | grep -v 'generated' | sort | uniq -c | sort -rn"
echo ""
echo "# View by crate"
echo "grep 'generated' /tmp/clippy_full.txt"
echo "\`\`\`"
echo ""

echo "---"
echo ""
echo "**Report generated by**: \`validate_clippy.sh\`"
echo "**Next validation**: Run after Phase 1 auto-fixes"
echo "**Contact**: DevOps Team"

} | tee "$OUTPUT_FILE"

echo ""
echo "============================================"
echo "  Validation Report Complete"
echo "============================================"
echo ""
echo "Report saved to: $OUTPUT_FILE"
echo "Full clippy output: /tmp/clippy_full.txt"
echo ""
echo "Quick summary:"
echo "  Total warnings: $TOTAL_WARNINGS"
echo "  ML crate:       $ML_WARNINGS"
echo "  Common crate:   $COMMON_WARNINGS"
echo "  Critical:       $CRITICAL_TOTAL"
echo ""

if [ $ML_WARNINGS -eq 0 ] && [ $COMMON_WARNINGS -eq 0 ]; then
    echo "✅ SUCCESS - Core crates are clean!"
else
    echo "⚠️  WARNING - Core crates have issues"
fi