#!/bin/bash

# Check if a branch name was provided
if [ -z "$1" ]; then
    echo "Error: Please provide the name of the branch to merge"
    echo "Usage: ./git-merge.sh branch_name"
    exit 1
fi

BRANCH_NAME=$1

# Check if the branch exists
if ! git show-ref --verify --quiet refs/heads/$BRANCH_NAME; then
    echo "Error: Branch '$BRANCH_NAME' does not exist"
    exit 1
fi

# Display the steps that will be executed
echo "=== Starting merge process ==="
echo "1. Checkout to main"
echo "2. Pull latest changes"
echo "3. Merge branch $BRANCH_NAME"
echo "4. Push to origin"
echo "5. Delete local and remote branches"

# Ask for confirmation
read -p "Do you want to continue? (y/n) " -n 1 -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    echo "Operation cancelled"
    exit 1
fi

# Execute commands
echo -e "\n=== Checking out to main ==="
git checkout main
if [ $? -ne 0 ]; then
    echo "Error during checkout to main"
    exit 1
fi

echo -e "\n=== Pulling latest changes ==="
git pull origin main
if [ $? -ne 0 ]; then
    echo "Error during pull"
    exit 1
fi

echo -e "\n=== Merging branch $BRANCH_NAME ==="
git merge $BRANCH_NAME
if [ $? -ne 0 ]; then
    echo "Error during merge. Please resolve conflicts manually"
    exit 1
fi

echo -e "\n=== Pushing to origin ==="
git push origin main
if [ $? -ne 0 ]; then
    echo "Error during push"
    exit 1
fi

echo -e "\n=== Deleting local branch ==="
git branch -d $BRANCH_NAME
if [ $? -ne 0 ]; then
    echo "Warning: Unable to delete local branch"
    echo "If you are sure everything is properly merged, use: git branch -D $BRANCH_NAME"
fi

echo -e "\n=== Deleting remote branch ==="
git push origin --delete $BRANCH_NAME
if [ $? -ne 0 ]; then
    echo "Warning: Unable to delete remote branch"
fi

echo -e "\n=== Merge process completed successfully ==="