#!/bin/bash
#
# The Order - Automated Deployment Script
# Main orchestrator for deployment automation
#

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "${SCRIPT_DIR}/config.sh"

# Usage
usage() {
  cat << EOF
Usage: $0 [OPTIONS] [PHASES...]

Deploy The Order application to Azure/Kubernetes.

OPTIONS:
  -e, --environment ENV     Environment (dev, stage, prod) [default: dev]
  -p, --phase PHASE         Run specific phase (1-15)
  -a, --all                 Run all phases
  -s, --skip PHASE          Skip specific phase
  -c, --continue            Continue from last saved state
  --auto-apply              Auto-apply Terraform changes (default: requires review)
  --skip-build              Skip build steps
  --dry-run                 Show what would be done without executing
  -h, --help                Show this help message

PHASES:
  1  - Prerequisites
  2  - Azure Infrastructure Setup
  3  - Entra ID Configuration (manual)
  4  - Database & Storage Setup
  5  - Container Registry Setup
  6  - Application Build & Package
  7  - Database Migrations
  8  - Secrets Configuration (manual)
  9  - Infrastructure Services Deployment
  10 - Backend Services Deployment
  11 - Frontend Applications Deployment
  12 - Networking & Gateways
  13 - Monitoring & Observability
  14 - Testing & Validation
  15 - Production Hardening

EXAMPLES:
  # Deploy all phases for dev environment
  $0 --all --environment dev

  # Deploy specific phases
  $0 --phase 1 --phase 2 --phase 6

  # Continue from last state
  $0 --continue

  # Deploy with auto-apply
  $0 --all --auto-apply

EOF
}

# Parse arguments
PHASES=()
SKIP_PHASES=()
RUN_ALL=false
CONTINUE=false
DRY_RUN=false

while [[ $# -gt 0 ]]; do
  case $1 in
    -e|--environment)
      ENVIRONMENT="$2"
      export ENVIRONMENT
      shift 2
      ;;
    -p|--phase)
      PHASES+=("$2")
      shift 2
      ;;
    -a|--all)
      RUN_ALL=true
      shift
      ;;
    -s|--skip)
      SKIP_PHASES+=("$2")
      shift 2
      ;;
    -c|--continue)
      CONTINUE=true
      shift
      ;;
    --auto-apply)
      export AUTO_APPLY=true
      shift
      ;;
    --skip-build)
      export SKIP_BUILD=true
      shift
      ;;
    --dry-run)
      DRY_RUN=true
      shift
      ;;
    -h|--help)
      usage
      exit 0
      ;;
    *)
      echo "Unknown option: $1"
      usage
      exit 1
      ;;
  esac
done

# Load state if continuing
if [ "${CONTINUE}" = "true" ]; then
  STATE=$(load_state)
  LAST_PHASE=$(echo "${STATE}" | jq -r '.phase' 2>/dev/null || echo "none")
  log_info "Continuing from phase: ${LAST_PHASE}"
fi

# Phase scripts mapping
declare -A PHASE_SCRIPTS=(
  ["1"]="phase1-prerequisites.sh"
  ["2"]="phase2-azure-infrastructure.sh"
  ["3"]="phase3-entra-id.sh"
  ["4"]="phase4-database-storage.sh"
  ["5"]="phase5-container-registry.sh"
  ["6"]="phase6-build-package.sh"
  ["7"]="phase7-database-migrations.sh"
  ["8"]="phase8-secrets.sh"
  ["9"]="phase9-infrastructure-services.sh"
  ["10"]="phase10-backend-services.sh"
  ["11"]="phase11-frontend-apps.sh"
  ["12"]="phase12-networking.sh"
  ["13"]="phase13-monitoring.sh"
  ["14"]="phase14-testing.sh"
  ["15"]="phase15-production.sh"
)

# Determine phases to run
PHASES_TO_RUN=()

if [ "${RUN_ALL}" = "true" ]; then
  PHASES_TO_RUN=({1..15})
elif [ ${#PHASES[@]} -gt 0 ]; then
  PHASES_TO_RUN=("${PHASES[@]}")
elif [ "${CONTINUE}" = "true" ]; then
  # Continue from last phase
  if [ "${LAST_PHASE}" != "none" ] && [ "${LAST_PHASE}" != "complete" ]; then
    LAST_PHASE_NUM=$(echo "${LAST_PHASE}" | sed 's/phase//')
    for i in $(seq "${LAST_PHASE_NUM}" 15); do
      PHASES_TO_RUN+=("$i")
    done
  else
    log_info "No previous state found, starting from phase 1"
    PHASES_TO_RUN=({1..15})
  fi
else
  log_error "No phases specified. Use --all, --phase, or --continue"
  usage
  exit 1
fi

# Filter out skipped phases
FILTERED_PHASES=()
for phase in "${PHASES_TO_RUN[@]}"; do
  SKIP=false
  for skip in "${SKIP_PHASES[@]}"; do
    if [ "${phase}" = "${skip}" ]; then
      SKIP=true
      break
    fi
  done
  if [ "${SKIP}" = "false" ]; then
    FILTERED_PHASES+=("${phase}")
  fi
done

# Run phases
log_info "=========================================="
log_info "The Order - Automated Deployment"
log_info "Environment: ${ENVIRONMENT}"
log_info "Phases to run: ${FILTERED_PHASES[*]}"
log_info "=========================================="

if [ "${DRY_RUN}" = "true" ]; then
  log_info "DRY RUN MODE - No changes will be made"
  for phase in "${FILTERED_PHASES[@]}"; do
    SCRIPT="${PHASE_SCRIPTS[$phase]}"
    if [ -n "${SCRIPT}" ]; then
      log_info "Would run: ${SCRIPT_DIR}/${SCRIPT}"
    else
      log_warning "No script found for phase ${phase}"
    fi
  done
  exit 0
fi

# Execute phases
FAILED_PHASES=()
for phase in "${FILTERED_PHASES[@]}"; do
  SCRIPT="${PHASE_SCRIPTS[$phase]}"
  
  if [ -z "${SCRIPT}" ]; then
    log_warning "No script found for phase ${phase}, skipping..."
    continue
  fi
  
  SCRIPT_PATH="${SCRIPT_DIR}/${SCRIPT}"
  
  if [ ! -f "${SCRIPT_PATH}" ]; then
    log_warning "Script not found: ${SCRIPT_PATH}"
    log_info "Phase ${phase} may require manual steps. See deployment guide."
    continue
  fi
  
  log_info "=========================================="
  log_info "Executing Phase ${phase}"
  log_info "=========================================="
  
  if bash "${SCRIPT_PATH}"; then
    log_success "Phase ${phase} completed successfully"
  else
    log_error "Phase ${phase} failed"
    FAILED_PHASES+=("${phase}")
    
    # Ask if should continue
    read -p "Continue with next phase? (y/N): " -n 1 -r
    echo
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
      log_error "Deployment stopped by user"
      break
    fi
  fi
done

# Summary
log_info "=========================================="
log_info "Deployment Summary"
log_info "=========================================="

if [ ${#FAILED_PHASES[@]} -eq 0 ]; then
  log_success "All phases completed successfully!"
  save_state "complete" "all"
else
  log_error "Failed phases: ${FAILED_PHASES[*]}"
  log_info "Review logs at: ${LOG_FILE}"
  exit 1
fi

log_info "Deployment log: ${LOG_FILE}"
log_info "State file: ${STATE_FILE}"