#!/bin/bash

# Check for the "final" flag in command line arguments
finalFlag=false
for arg in "$@"; do
    if [[ "$arg" == "final" ]]; then
        finalFlag=true
        break
    fi
done

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

# Convert tags into an array
if [[ $(echo "$BASH_VERSION" | cut -d. -f1) -ge 4 ]]; then
    readarray -t tagArray <<< "$tags"
else
    IFS=$'\n' read -d '' -ra tagArray <<< "$tags"
fi

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

# Find the last tag or the last "final" tag based on the flag
if $finalFlag; then
    for (( i=len-1; i>=0; i-- )); do
        if [[ "${tagArray[i]}" == *"final"* ]]; then
            latestTag="${tagArray[i]}"
            break
        fi
    done
    if [ -z "$latestTag" ]; then
        echo "No 'final' tag found."
        exit 1
    fi
else
    if [ "$len" -gt 0 ]; then
        latestTag="${tagArray[$len-1]}"
    else
        echo "No tags found."
        exit 1
    fi
fi

# Print release notes
echo ""
echo "Release Notes from $latestTag to HEAD:"
echo ""

# Fetch commit logs from the latest tag to HEAD and categorize them
newfeatures=$(git log "$latestTag"..HEAD --pretty=format:"%s" | grep 'new:' | sed 's/new:/* /g' | sort | uniq)
updatedfeatures=$(git log "$latestTag"..HEAD --pretty=format:"%s" | grep 'update:' | sed 's/update:/* /g' | sort | uniq)
fixedfeatures=$(git log "$latestTag"..HEAD --pretty=format:"%s" | grep 'fix:' | sed 's/fix:/* /g' | sort | uniq)
deletedfeatures=$(git log "$latestTag"..HEAD --pretty=format:"%s" | grep 'delete:' | sed 's/delete:/* /g' | sort | uniq)

# Output formatted commit lists
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 ""