#!/bin/bash
total_commits=$(git rev-list HEAD --count)
current_commit=$total_commits

show_commit_diff() {
    if [ "$current_commit" -le "$total_commits" ] && [ "$current_commit" -ge 1 ]; then
        commit_hash=$(git rev-list --reverse HEAD | sed -n "${current_commit}p")
        git --no-pager show "$commit_hash"
    fi
}

while true; do
    clear  # Clear the terminal
    show_commit_diff

    # Display navigation options
    echo "-----------------------------------------------------------"
    echo "Navigation: N - Next Commit, P - Previous Commit, Q - Quit"
    echo "-----------------------------------------------------------"
    read -r -n1 -s option

    case $option in
        p|P)
            # shellcheck disable=2086
            if [ $current_commit -gt 1 ]; then
                ((current_commit--))
            fi
            ;;
        n|N)
            # shellcheck disable=2086
            if [ $current_commit -lt $total_commits ]; then
                ((current_commit++))
            fi
            ;;
        q|Q)
            break
            ;;
        *)
            echo "Invalid option"
            ;;
    esac
done