#!/bin/bash
# usage:
#   ./scripts/build_android.sh --output /absolute/path/to/dir_or_apk [extra flutter build args...]

set -euo pipefail

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

DEFAULT_OUTPUT_DIR="$PROJECT_ROOT/build/android_release"
DEFAULT_OUTPUT_PATH="$DEFAULT_OUTPUT_DIR/app-release.apk"

OUTPUT_PATH="$DEFAULT_OUTPUT_PATH"
EXTRA_ARGS=()

while [[ $# -gt 0 ]]; do
  case "$1" in
    --output=*)
      OUTPUT_PATH="${1#*=}"
      shift
      ;;
    --output)
      if [[ $# -lt 2 ]]; then
        echo "参数错误: --output 需要一个路径" >&2
        exit 1
      fi
      OUTPUT_PATH="$2"
      shift 2
      ;;
    *)
      EXTRA_ARGS+=("$1")
      shift
      ;;
  esac
done

pushd "$PROJECT_ROOT" >/dev/null
echo "📦 清理旧构建..."
flutter clean

echo "📚 获取依赖..."
flutter pub get

echo "🤖 开始构建 Android APK..."
flutter build apk --release "${EXTRA_ARGS[@]}"
popd >/dev/null

ARTIFACT_DIR="$PROJECT_ROOT/build/app/outputs/flutter-apk"
if [[ ! -d "$ARTIFACT_DIR" ]]; then
  echo "未找到 APK 输出目录：$ARTIFACT_DIR" >&2
  exit 1
fi

BUILT_APK="$(find "$ARTIFACT_DIR" -maxdepth 1 -name '*.apk' -print | head -n 1)"
if [[ -z "$BUILT_APK" || ! -f "$BUILT_APK" ]]; then
  echo "未找到构建出的 APK 文件" >&2
  exit 1
fi

if [[ "$OUTPUT_PATH" == *.apk ]]; then
  TARGET_PATH="$OUTPUT_PATH"
  mkdir -p "$(dirname "$TARGET_PATH")"
else
  mkdir -p "$OUTPUT_PATH"
  TARGET_PATH="$OUTPUT_PATH/$(basename "$BUILT_APK")"
fi

cp "$BUILT_APK" "$TARGET_PATH"
echo "✅ 构建完成，APK 已保存到：$TARGET_PATH"