#!/bin/bash
# Git Credentials Test Script for Linux Mint

set -e

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
PURPLE='\033[0;35m'
CYAN='\033[0;36m'
NC='\033[0m' # No Color

print_header() {
    echo -e "${CYAN}🧪 Git Credentials Test${NC}"
    echo -e "${CYAN}======================${NC}"
    echo ""
}

print_success() {
    echo -e "${GREEN}✅ $1${NC}"
}

print_error() {
    echo -e "${RED}❌ $1${NC}"
}

print_warning() {
    echo -e "${YELLOW}⚠️  $1${NC}"
}

print_info() {
    echo -e "${PURPLE}ℹ️  $1${NC}"
}

# Main script
print_header

# Check if we're in a Git repository
if [ ! -d ".git" ]; then
    print_error "Not in a Git repository. Please run from the repository root."
    exit 1
fi

# Get repository info
print_info "Repository Information:"
echo "Remote URL: $(git remote get-url origin 2>/dev/null || echo 'No remote')"
echo "Current Branch: $(git branch --show-current 2>/dev/null || echo 'No branch')"
echo ""

# Check Git configuration
print_info "Git Configuration:"
echo "User Name: $(git config --global user.name 2>/dev/null || echo 'Not set')"
echo "User Email: $(git config --global user.email 2>/dev/null || echo 'Not set')"
echo "Credential Helper: $(git config --global credential.helper 2>/dev/null || echo 'Not set')"
echo ""

# Test credential helper
credential_helper=$(git config --global credential.helper 2>/dev/null || echo "")

print_info "Testing Credential Setup:"
case $credential_helper in
    "cache")
        print_success "Using Git credential cache"
        echo "   Credentials cached temporarily (default: 15 minutes)"
        ;;
    "store")
        print_warning "Using Git credential store (plain text)"
        echo "   Credentials stored in: ~/.git-credentials"
        ;;
    "libsecret")
        print_success "Using GNOME Keyring (encrypted)"
        echo "   Credentials stored securely in keyring"
        ;;
    "vscode")
        print_success "Using VS Code credential helper"
        echo "   VS Code manages credentials securely"
        ;;
    "")
        print_error "No credential helper configured"
        echo "   Run ./setup-git-credentials-linux.sh to configure"
        ;;
    *)
        print_info "Using custom credential helper: $credential_helper"
        ;;
esac

# Check SSH keys if using SSH remote
remote_url=$(git remote get-url origin 2>/dev/null || echo "")
if [[ $remote_url == git@* ]]; then
    echo ""
    print_info "SSH Key Check:"

    ssh_key_path="$HOME/.ssh/id_ed25519"
    if [ -f "$ssh_key_path" ]; then
        print_success "SSH key found at: $ssh_key_path"

        # Test SSH connection
        echo "Testing SSH connection to git.d-popov.com..."
        if ssh -T git@git.d-popov.com "echo 'SSH connection successful'" 2>/dev/null; then
            print_success "SSH connection to git.d-popov.com works"
        else
            print_error "SSH connection failed"
            echo "   Make sure your public key is added to git.d-popov.com"
            echo "   Test manually: ssh -T git@git.d-popov.com"
        fi
    else
        print_error "SSH key not found at: $ssh_key_path"
        echo "   Run ./setup-git-credentials-linux.sh and choose SSH option"
    fi
fi

# Test Git operations
echo ""
print_info "Testing Git Operations:"

echo -n "git fetch: "
if git fetch --quiet 2>/dev/null; then
    print_success "Success"
else
    print_error "Failed"
fi

echo -n "git status: "
if git status --porcelain >/dev/null 2>&1; then
    print_success "Success"
else
    print_error "Failed"
fi

# Summary and recommendations
echo ""
print_info "Summary & Recommendations:"

if [ -z "$credential_helper" ]; then
    print_error "No credential helper configured"
    echo "   → Run ./setup-git-credentials-linux.sh"
elif [ "$credential_helper" = "store" ]; then
    print_warning "Using plain text credential storage"
    echo "   → Consider switching to SSH keys or GNOME Keyring"
elif [[ $remote_url == git@* ]] && [ ! -f "$HOME/.ssh/id_ed25519" ]; then
    print_warning "Using SSH but no SSH key found"
    echo "   → Set up SSH keys for passwordless authentication"
else
    print_success "Credential setup looks good!"
    echo "   → You should be able to push/pull without prompts"
fi

echo ""
print_info "Troubleshooting Commands:"
echo "• Clear stored credentials: git config --global --unset credential.helper"
echo "• Reset credential helper: ./setup-git-credentials-linux.sh"
echo "• Test SSH: ssh -T git@git.d-popov.com"
echo "• Check Git config: git config --list --show-origin"
echo "• Clear credential cache: git config --global --unset-all credential.helper"