#!/usr/bin/env bash
set -Eeuo pipefail

APP_DIR="${APP_DIR:-/www/wwwroot/wx_service}"
DEPLOY_REF="${DEPLOY_REF:-main}"
GO_VERSION="${GO_VERSION:-1.23.6}"
GO_ROOT="${GO_ROOT:-/usr/local/go}"
GO_BIN="${GO_BIN:-${GO_ROOT}/bin/go}"
TMP_BUILD_BIN="${TMP_BUILD_BIN:-/tmp/wx_service-${DEPLOY_REF:0:12}}"

DIST_DIR="${DIST_DIR:-${APP_DIR}/dist}"
SERVICE_NAME="${SERVICE_NAME:-wx_service}"
RUN_USER="${RUN_USER:-www}"
RUN_GROUP="${RUN_GROUP:-www}"
PORT="${PORT:-8080}"
RELEASE_ID="${RELEASE_ID:-${DEPLOY_REF}}"

log() {
  echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*"
}

install_go_if_needed() {
  local need_install="false"

  if [ ! -x "$GO_BIN" ]; then
    need_install="true"
  else
    local current
    current="$($GO_BIN version 2>/dev/null | awk '{print $3}' | sed 's/^go//')"
    if [ -z "$current" ] || [ "$current" != "$GO_VERSION" ]; then
      need_install="true"
    fi
  fi

  if [ "$need_install" = "false" ]; then
    log "go toolchain ok: $($GO_BIN version)"
    return 0
  fi

  log "installing go ${GO_VERSION}"
  local pkg="/tmp/go${GO_VERSION}.linux-amd64.tar.gz"
  curl -fL "https://dl.google.com/go/go${GO_VERSION}.linux-amd64.tar.gz" -o "$pkg"
  rm -rf "$GO_ROOT"
  tar -C /usr/local -xzf "$pkg"
  rm -f "$pkg"
  log "go installed: $($GO_BIN version)"
}

if [ ! -d "$APP_DIR/.git" ]; then
  echo "invalid app repo: $APP_DIR" >&2
  exit 1
fi

install_go_if_needed

log "syncing repo to ${DEPLOY_REF}"
git -C "$APP_DIR" fetch --all --prune
git -C "$APP_DIR" reset --hard "$DEPLOY_REF"

export PATH="$GO_ROOT/bin:$PATH"
export GOPROXY="${GOPROXY:-https://goproxy.cn,direct}"

log "downloading go modules"
cd "$APP_DIR"
"$GO_BIN" mod download

log "building binary"
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 "$GO_BIN" build -trimpath -ldflags "-s -w" -o "$TMP_BUILD_BIN" ./cmd/api
chmod 755 "$TMP_BUILD_BIN"

log "publishing binary via deploy_binary.sh"
APP_DIR="$APP_DIR" \
DIST_DIR="$DIST_DIR" \
SOURCE_BIN="$TMP_BUILD_BIN" \
SERVICE_NAME="$SERVICE_NAME" \
RUN_USER="$RUN_USER" \
RUN_GROUP="$RUN_GROUP" \
PORT="$PORT" \
RELEASE_ID="$RELEASE_ID" \
SYNC_CODE="false" \
INSTALL_SERVICE="true" \
bash "$APP_DIR/scripts/ops/deploy_binary.sh"

log "source deploy done"