#!/usr/bin/env bash
# =============================================================================
#  04-build.sh — 编译所有后端 Go 服务
#
#  编译产物输出至 .local-dev/bin/
#  支持只编译单个服务：./04-build.sh [service-name]
#
#  可用服务名: openim-server, chat-rpc, admin-rpc, chat-api, admin-api,
#              meetingmsg, livecloud, livestream
#
#  后续步骤：05-start.sh（启动后端服务）
# =============================================================================
set -euo pipefail
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/common.sh"
init_dirs
init_script_log       # ← 脚本执行日志
require_tools go

header "步骤 4 / 5 — 编译后端 Go 服务"

# 编译单个服务的函数
# 用法: _build <output-name> <source-dir> <package>
_build() {
  local name="$1" dir="$ROOT_DIR/$2" pkg="$3"
  local out="$BUILD_DIR/$name"

  info "编译 ${BOLD}$name${NC} ..."
  local start_ts=$SECONDS

  if (cd "$dir" && go build -o "$out" "$pkg"); then
    local elapsed=$(( SECONDS - start_ts ))
    success "  ✓ $name → $out  (${elapsed}s)"
  else
    error "  ✗ $name 编译失败"
    return 1
  fi
}

# 服务列表：名称 | 源码目录（相对 ROOT） | 包路径
declare -A SVC_DIR=(
  [openim-server]="open-im-server"
  [chat-rpc]="chat"
  [admin-rpc]="chat"
  [chat-api]="chat"
  [admin-api]="chat"
  [meetingmsg]="meetingmsg"
  [livecloud]="livecloud"
  [livestream]="livestream"
  [build-server]="build-server"
)

declare -A SVC_PKG=(
  [openim-server]="./cmd/main.go"
  [chat-rpc]="./cmd/rpc/chat-rpc/"
  [admin-rpc]="./cmd/rpc/admin-rpc/"
  [chat-api]="./cmd/api/chat-api/"
  [admin-api]="./cmd/api/admin-api/"
  [meetingmsg]="."
  [livecloud]="."
  [livestream]="."
  [build-server]="."
)

# ── 判断是编译单个还是全部 ────────────────────────────────────────────────────
TARGET="${1:-all}"

if [[ "$TARGET" == "all" ]]; then
  step "编译全部服务（共 ${#SVC_DIR[@]} 个）"
  FAILED=()
  for svc in openim-server chat-rpc admin-rpc chat-api admin-api meetingmsg livecloud livestream build-server; do
    _build "$svc" "${SVC_DIR[$svc]}" "${SVC_PKG[$svc]}" || FAILED+=("$svc")
  done

  echo ""
  if [[ ${#FAILED[@]} -eq 0 ]]; then
    success "所有服务编译完成！"
    ls -lh "$BUILD_DIR/" | awk 'NR>1 {printf "  %-20s %s\n", $NF, $5}'
  else
    error "以下服务编译失败: ${FAILED[*]}"
    echo ""
    echo "排查建议："
    echo "  1. cd $ROOT_DIR/<service-dir> && go mod tidy"
    echo "  2. 检查 Go 版本: go version（推荐 1.21+）"
    echo "  3. 检查模块依赖: go mod download"
    exit 1
  fi
else
  # 编译单个服务
  if [[ -z "${SVC_DIR[$TARGET]:-}" ]]; then
    error "未知服务: $TARGET"
    echo "可用: ${!SVC_DIR[*]}"
    exit 1
  fi
  step "编译单个服务: $TARGET"
  _build "$TARGET" "${SVC_DIR[$TARGET]}" "${SVC_PKG[$TARGET]}"
  success "$TARGET 编译完成"
fi

echo ""
echo -e "${BOLD}下一步：${NC}"
echo -e "  启动所有后端服务："
echo -e "  ${CYAN}./deploy-test/05-start.sh${NC}"
echo -e "  或只启动单个服务："
echo -e "  ${CYAN}./deploy-test/05-start.sh openim-server${NC}"