#!/bin/bash
# Git pre-commit hook: Auto-increment patch version, optional minor bump
# Install: cp scripts/pre-commit .git/hooks/pre-commit && chmod +x .git/hooks/pre-commit

VERSION_FILE="meshbot/version.py"
CHANGELOG_FILE="CHANGELOG.md"

if [ ! -f "$VERSION_FILE" ]; then
    exit 0
fi

# Read current version
MAJOR=$(grep "^MAJOR" "$VERSION_FILE" | awk -F'= ' '{print $2}')
MINOR=$(grep "^MINOR" "$VERSION_FILE" | awk -F'= ' '{print $2}')
PATCH=$(grep "^PATCH" "$VERSION_FILE" | awk -F'= ' '{print $2}')

echo "Current version: $MAJOR.$MINOR.$PATCH"

# Ask for minor bump (only if interactive terminal)
if [ -t 0 ]; then
    read -p "Minor-Version erhöhen? (y/N) " -n 1 -r
    echo
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        MINOR=$((MINOR + 1))
        PATCH=0
    else
        PATCH=$((PATCH + 1))
    fi
else
    PATCH=$((PATCH + 1))
fi

NEW_VERSION="$MAJOR.$MINOR.$PATCH"
echo "New version: $NEW_VERSION"

# Update version.py
cat > "$VERSION_FILE" << EOF
MAJOR = $MAJOR
MINOR = $MINOR
PATCH = $PATCH

VERSION = f"{MAJOR}.{MINOR}.{PATCH}"
EOF

# Update CHANGELOG.md - add entry after first "## " line
DATE=$(date +%Y-%m-%d)
COMMIT_MSG=$(git log --format=%B -1 HEAD 2>/dev/null || echo "Update")

# Get staged files for changelog context
STAGED_FILES=$(git diff --cached --name-only)

# Add changelog entry
TEMP_FILE=$(mktemp)
HEADER_DONE=false

while IFS= read -r line; do
    echo "$line" >> "$TEMP_FILE"
    if [[ "$line" == "# Changelog" ]] && [ "$HEADER_DONE" = false ]; then
        echo "" >> "$TEMP_FILE"
        echo "## [$NEW_VERSION] - $DATE" >> "$TEMP_FILE"
        echo "### Changed" >> "$TEMP_FILE"
        echo "- Auto-commit update" >> "$TEMP_FILE"
        HEADER_DONE=true
    fi
done < "$CHANGELOG_FILE"

mv "$TEMP_FILE" "$CHANGELOG_FILE"

# Stage updated files
git add "$VERSION_FILE" "$CHANGELOG_FILE"

echo "Version updated to $NEW_VERSION"