#!/usr/bin/env bash
# commands/build.command.sh
#
# Builds the Docker image and compose stack for a given environment.
#
# Usage:
#   dx build [flags]
#
# Flags:
#   --dev / --qly / --prd    Target environment (default: dev)
#   --project=NAME           Override project name
#   --port=PORT              Override app port (e.g. 8082, auto:8080)
#   --db=TYPE                Override DB engine (mysql | mssql)
#   --db-port=PORT           Override DB port
#   --sync-hosts             Sync domain to /etc/hosts (requires root)
#   --no-vhosts              Skip Apache vhost generation
#   --no-interact            Non-interactive mode
#   --debug                  Enable shell trace (set -x)

# ============================================
# Lifecycle
# ============================================

function cmd::build::on_load() {
  load_module template
  load_module apache

  flag::register \
    --sync-hosts \
    --no-vhosts \
    --no-interact \
    --scaffold \
    --framework \
    --debug
}

# ============================================
# Public entrypoint
# ============================================

function cmd::build::run() {
  local flags=()

  for arg in "$@"; do
    flags+=("$arg")
  done

  if ! flag::parse "${flags[@]+"${flags[@]}"}"; then
    cmd::build::help
    return 1
  fi

  # CLI overrides — applied after env files so flags win
  [[ -n "${PROJECT_NAME_OVERRIDE:-}" ]] && export PROJECT_NAME="$PROJECT_NAME_OVERRIDE"
  [[ -n "${APP_PORT_OVERRIDE:-}"     ]] && export APP_PORT="$APP_PORT_OVERRIDE"
  [[ -n "${DB_ENGINE_OVERRIDE:-}"    ]] && export DB_ENGINE="$DB_ENGINE_OVERRIDE"
  [[ -n "${DB_PORT_OVERRIDE:-}"      ]] && export DB_PORT="$DB_PORT_OVERRIDE"

  # ============================================
  # Project scaffolding
  # ============================================

  if ! app::exists || flag::enabled --scaffold; then
    app::scaffold "$(ctx::root)"
  fi

  # ============================================
  # Runtime artifacts
  # ============================================

  artifact::init

  # ============================================
  # Network & Virtual Hosts
  # ============================================

  network::ports::prepare

  if flag::enabled --sync-hosts && ! flag::enabled --no-interact; then
    load_command hosts
    hosts::sync
  fi

  if ! flag::enabled --no-vhosts; then
    apache::generate_vhosts
  fi

  # ============================================
  # Docker image
  # ============================================

  runtime::run_if BUILD_IMAGE docker::image::generate || {
    log::error "Failed to generate Docker image (${APP_IMAGE}:${ENVIRONMENT})"
    return 1
  }

  runtime::run_if BUILD_IMAGE docker::image::build || {
    log::error "Failed to build Docker image (${APP_IMAGE}:${ENVIRONMENT})"
    return 1
  }

  # ============================================
  # Docker compose stack
  # ============================================

  runtime::run_if BUILD_STACK docker::compose::generate || {
    log::error "Failed to generate compose stack (${ENVIRONMENT})"
    return 1
  }

  runtime::run_if BUILD_STACK docker::compose::build || {
    log::error "Failed to build compose stack (${ENVIRONMENT})"
    return 1
  }

  # ============================================
  # Done
  # ============================================

  cmd::build::_show_networking
  log::success "Build complete!"

  flag::scaffold_defaults_file
  cmd::build::_hint_next_steps
}

# ============================================
# Help
# ============================================

function cmd::build::help() {
  cat <<EOF
Usage: dx build [flags]

Generates and builds the Docker image and compose stack.

Flags:
  --dev / --qly / --prd    Target environment (default: dev)
  --project=NAME           Override project name
  --port=PORT              Override app port
  --db=TYPE                Override DB engine (mysql | mssql)
  --db-port=PORT           Override DB port
  --sync-hosts             Sync domain to /etc/hosts
  --no-vhosts              Skip vhost generation
  --no-interact            Non-interactive mode
  --debug                  Shell trace

Examples:
  dx build
  dx build --qly
  dx build --port=8082
  dx build --sync-hosts
  dx build --project=myapp --db=mssql
EOF
}

# ============================================
# Private
# ============================================

function cmd::build::_show_networking() {
  printf "\n🌐  Accessible on: http://%s\n\n" "$DOMAIN"
  echo "🔌  Ports:"
  echo "    App: ${APP_PORT}"
  echo "    DB:  $(docker::db::external_port)"
  printf "\n"
}

function cmd::build::_hint_next_steps() {
cat <<EOF

Next steps:
  dx init          Initialize environment
  dx up            Start the stack

EOF
}