#!/bin/bash

# Get tags sorted by creation date
tags=$(git tag --sort=creatordate)

# Convert tags into an array using a mapfile or read -a
if [[ $(echo "$BASH_VERSION" | cut -d. -f1) -ge 4 ]]; then
    # For Bash 4 and newer
    readarray -t tagArray <<< "$tags"
else
    # For older Bash versions like the default on macOS
    IFS=$'\n' read -d '' -ra tagArray <<< "$tags"
fi

# Determine the number of tags
len=${#tagArray[@]}

# Get the last two tags if there are at least two tags
if [ "$len" -gt 1 ]; then
    latestTag=${tagArray[$len-1]}
    secondLastTag=${tagArray[$len-2]}
else
    echo "Not enough tags found. Need at least two."
    exit 1
fi

# Generate release notes from commits between the two latest tags
echo ""
echo "Release Notes from $secondLastTag to $latestTag:"
echo ""

# Separate types of commits
newfeatures=$(git log "$secondLastTag".."$latestTag" --pretty=format:"%s" | grep 'new:' | sed 's/new:/* /g' | sort | uniq)
updatedfeatures=$(git log "$secondLastTag".."$latestTag" --pretty=format:"%s" | grep 'update:' | sed 's/update:/* /g' | sort | uniq)
fixedfeatures=$(git log "$secondLastTag".."$latestTag" --pretty=format:"%s" | grep 'fix:' | sed 's/fix:/* /g' | sort | uniq)
deletedfeatures=$(git log "$secondLastTag".."$latestTag" --pretty=format:"%s" | grep 'delete:' | sed 's/delete:/* /g' | sort | uniq)

echo "New Features:"
if [ -z "$newfeatures" ]; then
    echo "*  No new features."
else
    echo "$newfeatures"
fi
echo ""

echo "Updated Features:"
if [ -z "$updatedfeatures" ]; then
    echo "*  No updated features."
else
    echo "$updatedfeatures"
fi
echo ""

echo "Fixed Features:"
if [ -z "$fixedfeatures" ]; then
    echo "*  No fixed features."
else
    echo "$fixedfeatures"
fi
echo ""

echo "Deleted Features:"
if [ -z "$deletedfeatures" ]; then
    echo "*  No deleted features."
else
    echo "$deletedfeatures"
fi
echo ""