#!/bin/bash

# Load shared libraries
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../lib/init.sh"

# Dependency Analysis Script
# Analyzes all package.json files and identifies common dependencies

set -e

echo "🔍 Analyzing dependencies across all projects..."

OUTPUT_DIR="reports"
OUTPUT_FILE="$OUTPUT_DIR/dependency-analysis.md"
mkdir -p "$OUTPUT_DIR"

# Temporary files
TEMP_DEPS="/tmp/all-deps.txt"
TEMP_DEV_DEPS="/tmp/all-dev-deps.txt"

# Clear temp files
> "$TEMP_DEPS"
> "$TEMP_DEV_DEPS"

# Extract dependencies from all package.json files
echo "📋 Extracting dependencies..."

find . -name "package.json" -type f ! -path "*/node_modules/*" ! -path "*/.git/*" ! -path "*/dist/*" ! -path "*/build/*" | while read -r file; do
    project=$(dirname "$file" | sed 's|^\./||')

    # Extract dependencies
    if command -v jq &> /dev/null; then
        jq -r '.dependencies // {} | keys[]' "$file" 2>/dev/null | while read -r dep; do
            echo "$dep|$project" >> "$TEMP_DEPS"
        done

        jq -r '.devDependencies // {} | keys[]' "$file" 2>/dev/null | while read -r dep; do
            echo "$dep|$project" >> "$TEMP_DEV_DEPS"
        done
    else
        # Fallback: basic grep extraction (less accurate)
        grep -o '"[^"]*":\s*"[^"]*"' "$file" | grep -v ":" | sed 's/"//g' | while read -r dep; do
            echo "$dep|$project" >> "$TEMP_DEPS"
        done
    fi
done

# Generate report
cat > "$OUTPUT_FILE" << 'EOF'
# Dependency Analysis Report

**Generated**: $(date)
**Purpose**: Identify common dependencies across all projects

## Summary

This report analyzes dependencies across all projects in the workspace.

## Common Dependencies

### Most Frequently Used Dependencies

EOF

# Count and sort dependencies
echo "📊 Generating dependency statistics..."

if [ -f "$TEMP_DEPS" ]; then
    echo "### Production Dependencies" >> "$OUTPUT_FILE"
    echo "" >> "$OUTPUT_FILE"
    echo "| Dependency | Usage Count | Projects |" >> "$OUTPUT_FILE"
    echo "|------------|-------------|----------|" >> "$OUTPUT_FILE"

    sort "$TEMP_DEPS" | cut -d'|' -f1 | uniq -c | sort -rn | head -20 | while read -r count dep; do
        projects=$(grep "^$dep|" "$TEMP_DEPS" | cut -d'|' -f2 | sort -u | tr '\n' ', ' | sed 's/,$//')
        echo "| $dep | $count | $projects |" >> "$OUTPUT_FILE"
    done
    echo "" >> "$OUTPUT_FILE"
fi

if [ -f "$TEMP_DEV_DEPS" ]; then
    echo "### Development Dependencies" >> "$OUTPUT_FILE"
    echo "" >> "$OUTPUT_FILE"
    echo "| Dependency | Usage Count | Projects |" >> "$OUTPUT_FILE"
    echo "|------------|-------------|----------|" >> "$OUTPUT_FILE"

    sort "$TEMP_DEV_DEPS" | cut -d'|' -f1 | uniq -c | sort -rn | head -20 | while read -r count dep; do
        projects=$(grep "^$dep|" "$TEMP_DEV_DEPS" | cut -d'|' -f2 | sort -u | tr '\n' ', ' | sed 's/,$//')
        echo "| $dep | $count | $projects |" >> "$OUTPUT_FILE"
    done
    echo "" >> "$OUTPUT_FILE"
fi

cat >> "$OUTPUT_FILE" << EOF

## Recommendations

### Candidates for Shared Packages

Based on usage frequency, these dependencies are good candidates for hoisting to workspace root or shared packages:

1. **TypeScript/JavaScript Tooling**:
   - typescript
   - eslint
   - prettier
   - @typescript-eslint/*

2. **Testing**:
   - vitest / jest
   - @testing-library/*

3. **Utilities**:
   - zod (validation)
   - dotenv (configuration)
   - date-fns (date handling)

4. **Blockchain/Solidity**:
   - ethers / viem
   - @openzeppelin/contracts
   - foundry (dev dependency)

### Version Consolidation

Review and consolidate versions for:
- Common dependencies with version mismatches
- Outdated dependencies
- Security vulnerabilities

## Next Steps

1. Create shared packages for common utilities
2. Hoist common devDependencies to workspace root
3. Consolidate dependency versions
4. Set up automated dependency updates (Dependabot)

---

**Generated**: $(date)
EOF

echo "✅ Dependency analysis complete!"
echo "📄 Report saved to: $OUTPUT_FILE"

# Cleanup
rm -f "$TEMP_DEPS" "$TEMP_DEV_DEPS"