commit

#!/bin/bash

# Make the credentials available at the start of the script

y_regex="^([y|Y][eE][sS]|[y|Y])$"

email=$(grep -oP '^user_email:\s*\K.*' ~/.commitconfig)
username=$(grep -oP '^user_username:\s*\K.*' ~/.commitconfig)

# Check if the --help flag is used
if [[ "$*" == *"--help"* ]]; then
    echo "Usage: commit [options] [files]"
    echo
    echo "Options:"
    echo "  --help     Display this help message"
    echo "  --verbose  Display verbose output"
    echo
    echo "Description:"
    echo "  This script helps you stage, commit, and push changes to a Git repository."
    echo "  It prompts for a commit message and performs the necessary Git commands."
    echo
    echo "Examples:"
    echo "  commit => Commit all changes (assumes git add .)"
    echo "  commit file1.txt file2.txt => Stage and commit specific files"
    echo "  commit --verbose file.txt => Commit changes with verbose output"
    echo
    exit 0
fi

# Check if the current directory is a Git repository
if ! git rev-parse --is-inside-work-tree > /dev/null 2>&1; then
    read -rp "The current directory is not a Git repository. Would you like to initialize it? (y/n): " initialize
    if [[ "$initialize" =~ $y_regex ]]; then
        git init
    else
        echo "Script terminated. Please initialize a Git repository to continue."
        exit 1
    fi
fi

#Prompt for user input
read -rp "Enter commit message: " message
echo

# Validate that the commit message is not empty
if [[ -z "$message" ]]; then
    echo "Error: commit message cannot be empty"
    exit 1
fi

# Validate the length of the commit message
if [[ ${#message} -gt 50 ]]; then
    echo "Error: commit message exceeds the maximum length of 50 characters"
    exit 1
fi

# Set git config for the current user
if ! git config --local user.name "$username"; then
    echo "Error: unable to set git user name"
    exit 1
fi

if ! git config --local user.email "$email"; then
    echo "Error: unable to set git user email"
    exit 1
fi

# Check if the --verbose flag is used
verbose_flag=""
for arg in "$@"; do
    if [ "$arg" == "--verbose" ]; then
        verbose_flag="--verbose"
        break
    fi
done

# Remove the --verbose flag from the arguments
new_args=()
for arg in "$@"; do
    if [ "$arg" != "--verbose" ]; then
        new_args+=("$arg")
    fi
done

set -- "${new_args[@]}"

# Check if any files are specified
if [ $# -eq 0 ]; then
    # No files specified, assume all changes should be staged and committed
    if [[ -n "$verbose_flag" ]]; then
        # Display staging output when verbose flag is used
        echo "--- Staging Output ---"
        if ! git add .; then
            echo "--- Changes staged unsuccessfully ---"
            exit 1
        fi
        echo "--- Changes staged successfully ---"
    else
        # Suppress output when verbose flag is not used
        if ! git add . > /dev/null 2>&1; then
            echo "Error: unable to add changes to the staging area"
            echo "(Consider using the --verbose flag for more information)"
            exit 1
        fi
    fi

    # Check if any changes were added to the staging area
    staged_files=$(git diff --cached --name-only)
    if [[ -z "$staged_files" ]]; then
        echo "No recent changes have been made to any files"
        echo "(Consider using the --verbose flag for more information)"
        exit 1
    else
        echo "Changes staged successfully:"
        echo "$staged_files"
    fi
else

    # Stage specified files
    if [[ -n "$verbose_flag" ]]; then
        # Display staging output when verbose flag is used
        echo "--- Staging Output ---"
        if ! git add "$@"; then
            echo "--- Changes staged unsuccessfully ---"
            exit 1
        fi
        echo "--- Changes staged successfully ---"
    else
        # Suppress output when verbose flag is not used
        if ! git add "$@" > /dev/null 2>&1; then
            echo "Error: unable to add changes to the staging area"
            echo "(Consider using the --verbose flag for more information)"
            exit 1
        fi
    fi

    # Check if any changes were added to the staging area
    staged_files=$(git diff --cached --name-only -- "$@")
    if [[ -z "$staged_files" ]]; then
        echo "No recent changes have been made to the specified file(s)"
        echo "(Consider using the --verbose flag for more information)"
        exit 1
    else
        echo "Changes staged successfully:"
        echo "$staged_files"
    fi
fi
echo

# Commit the changes with the commit message
if [[ -n "$verbose_flag" ]]; then
    # Display commit output when verbose flag is used
    echo "--- Commit Output ---"
    git commit "$verbose_flag" -m "$message"
    echo "--- Changes committed successfully ---"
else
    # Suppress output when verbose flag is not used
    if ! git commit -m "$message" > /dev/null 2>&1; then
        echo "Error: unable to commit changes"
        echo "(Consider using the --verbose flag for more information)"
        exit 1
    fi
    echo "Changes committed successfully"
fi
echo

# Set upstream to be done automatically by git incase the user
# opened a new branch and wants to push the branch

git config --local --add --bool push.autoSetupRemote true

# Push the changes to the remote repository
if [[ -n "$verbose_flag" ]]; then
    # Display push output when verbose flag is used
    echo "--- Push Output ---"
    git push
    echo "--- Changes pushed successfully ---"
else
    # Suppress output when verbose flag is not used
    if ! git push > /dev/null 2>&1; then
        echo "Error: unable to push changes to the remote repository"
        echo "(Consider using the --verbose flag for more information)"
        exit 1
    fi
    echo "Changes pushed successfully"
fi
echo