undeploy

#!/bin/bash
# undeploy - Remove Django deployments safely
# 
# Usage: ./undeploy <project> <branch>
#
# Parameters:
#   project      - Project name (e.g., sampleapp, uno-admin)
#   branch       - Branch name (slashes converted to hyphens)
#
# Examples:
#   ./undeploy sampleapp main
#   ./undeploy uno-admin dev
#   ./undeploy myapp feature/auth

set -e  # Exit on any error

# Source common logging utilities
source "$(dirname "$0")/scripts/logging-utils.sh"

# Show usage information
show_usage() {
    cat << EOF
Usage: ./undeploy <project> <branch>

PARAMETERS:
    project       Project name (e.g., sampleapp, uno-admin)
    branch        Branch name (slashes converted to hyphens)

BRANCH NAMING:
    - Branch names with slashes are converted to hyphens for filesystem compatibility
    - Examples: 'main', 'dev', 'qa', 'feature/auth' → 'feature-auth'

EXAMPLES:
    # Remove main branch deployment
    ./undeploy sampleapp main
    
    # Remove dev branch deployment
    ./undeploy uno-admin dev
    
    # Remove feature branch deployment
    ./undeploy myapp feature/auth

SAFETY FEATURES:
    - Interactive confirmation required
    - Automatic backup creation before deletion
    - Production environments are protected
    - Complete service and database cleanup
    - Detailed logging of all operations

NOTES:
    - Backups are stored in /srv/deployment-backups/
    - Requires sudo privileges for system operations
    - Branch names with slashes are automatically converted to hyphens

EOF
}

# Convert branch name to filesystem-safe format
convert_branch_name() {
    local branch="$1"
    # Replace slashes with hyphens for filesystem compatibility
    echo "${branch//\//-}"
}

# Validate parameters
validate_parameters() {
    if [[ $# -lt 2 ]]; then
        log_error "Missing required parameters"
        show_usage
        exit 1
    fi
    
    PROJECT="$1"
    BRANCH="$2"
    NORMALIZED_BRANCH=$(convert_branch_name "$BRANCH")
    
    # Validate project name
    if [[ ! "$PROJECT" =~ ^[a-zA-Z0-9_-]+$ ]]; then
        log_error "Invalid project name '$PROJECT'. Use only letters, numbers, hyphens, and underscores."
        exit 1
    fi
    
    # Validate branch name
    if [[ ! "$BRANCH" =~ ^[a-zA-Z0-9_/-]+$ ]]; then
        log_error "Invalid branch name '$BRANCH'. Use only letters, numbers, hyphens, underscores, and forward slashes."
        exit 1
    fi
    
    log_info "Project: $PROJECT"
    log_info "Branch: $BRANCH"
    log_info "Normalized branch: $NORMALIZED_BRANCH"
}

# Check if deployment exists
check_deployment_exists() {
    local deployment_path="/srv/deployments/$PROJECT/$NORMALIZED_BRANCH"
    
    if [[ ! -d "$deployment_path" ]]; then
        log_error "Deployment not found: $PROJECT/$NORMALIZED_BRANCH"
        log_error "Path does not exist: $deployment_path"
        log_info "Use './status' to see available deployments"
        exit 1
    fi
    
    log_info "Found deployment: $deployment_path"
    echo "$deployment_path"
}

# Main execution function
main() {
    local script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
    local cleanup_script="$script_dir/scripts/cleanup-deployments.sh"
    
    # Create undeploy log with timestamp
    local log_timestamp=$(date +%Y%m%d%H%M%S)
    local log_file="$script_dir/logs/undeploy-${log_timestamp}.log"
    
    # Ensure logs directory exists
    mkdir -p "$script_dir/logs"
    
    # Validate input parameters
    validate_parameters "$@"
    
    # Create undeploy header in log
    {
        echo "[UNDEPLOY] $PROJECT $BRANCH"
        echo "========================================"
        echo ""
    } | tee "$log_file"
    
    log_step "Starting deployment removal process" | tee -a "$log_file"
    
    # Verify cleanup script exists
    if [[ ! -f "$cleanup_script" ]]; then
        log_error "Cleanup script not found: $cleanup_script" | tee -a "$log_file"
        exit 1
    fi
    
    # Check if deployment exists
    local deployment_path
    deployment_path=$(check_deployment_exists 2>&1 | tee -a "$log_file" | tail -1)
    
    # Run the cleanup script
    log_step "Executing cleanup script" | tee -a "$log_file"
    
    if "$cleanup_script" "$PROJECT" "$NORMALIZED_BRANCH" 2>&1 | tee -a "$log_file"; then
        # Update deployment registry to remove the deployment
        log_step "Updating deployment registry" | tee -a "$log_file"
        if python3 "$script_dir/scripts/manage-deployments-registry.py" remove --project "$PROJECT" --branch "$NORMALIZED_BRANCH" 2>&1 | tee -a "$log_file"; then
            log_info "✓ Deployment registry updated successfully" | tee -a "$log_file"
        else
            log_warn "⚠ Failed to update deployment registry (non-critical)" | tee -a "$log_file"
        fi
        
        log_success "🎉 Deployment removed successfully!" | tee -a "$log_file"
        log_info "📋 Full undeploy log: $log_file"
        log_info "💾 Backup location: /srv/deployment-backups/"
        exit 0
    else
        log_error "Undeployment failed" | tee -a "$log_file"
        log_error "📋 Full undeploy log: $log_file"
        exit 1
    fi
}

# Handle command line arguments
case "${1:-}" in
    -h|--help|help|"")
        show_usage
        exit 0
        ;;
    *)
        main "$@"
        ;;
esac