#!/bin/bash
set -euo pipefail

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

DEFAULT_OUTPUT_DIR="$PROJECT_ROOT/build/ios_release"
OUTPUT_DIR="$DEFAULT_OUTPUT_DIR"
EXTRA_ARGS=()

# -------- 路径验证函数 --------
validate_output_path() {
  local path="$1"
  
  # 如果是文件路径（以 .ipa 结尾）
  if [[ "$path" == *.ipa ]]; then
    local dir="$(dirname "$path")"
    # 检查目录是否可写
    if [[ ! -w "$dir" ]] 2>/dev/null; then
      # 尝试创建目录
      if ! mkdir -p "$dir" 2>/dev/null; then
        echo "❌ 错误: 无法创建输出目录: $dir" >&2
        echo "   提示: 请使用可写的路径，例如: ~/Desktop/output.ipa 或 ./build/myapp.ipa" >&2
        return 1
      fi
    fi
    # 检查父目录是否可写
    if [[ ! -w "$dir" ]]; then
      echo "❌ 错误: 输出目录不可写: $dir" >&2
      return 1
    fi
  else
    # 如果是目录路径
    if [[ ! -w "$(dirname "$path")" ]] 2>/dev/null && [[ "$path" != "$PROJECT_ROOT"* ]]; then
      # 尝试创建目录
      if ! mkdir -p "$path" 2>/dev/null; then
        echo "❌ 错误: 无法创建输出目录: $path" >&2
        echo "   提示: 请使用可写的路径，例如: ~/Desktop/ 或 ./build/" >&2
        return 1
      fi
    fi
  fi
  return 0
}

# -------- 参数解析 --------
while [[ $# -gt 0 ]]; do
  case "$1" in
    --output=*)
      OUTPUT_DIR="${1#*=}"
      shift
      ;;
    --output)
      [[ $# -lt 2 ]] && { echo "❌ --output 需要路径"; exit 1; }
      OUTPUT_DIR="$2"
      shift 2
      ;;
    *)
      EXTRA_ARGS+=("$1")
      shift
      ;;
  esac
done

# -------- 环境检查 --------
command -v flutter >/dev/null 2>&1 || {
  echo "❌ Flutter 未安装或未加入 PATH"
  exit 1
}

xcodebuild -version >/dev/null 2>&1 || {
  echo "❌ Xcode 未正确安装"
  exit 1
}

echo "🧩 Flutter 版本："
flutter --version

# 验证输出路径
if ! validate_output_path "$OUTPUT_DIR"; then
  echo "⚠️  使用默认输出目录: $DEFAULT_OUTPUT_DIR"
  OUTPUT_DIR="$DEFAULT_OUTPUT_DIR"
fi

# 展开 ~ 和相对路径
OUTPUT_DIR="${OUTPUT_DIR/#\~/$HOME}"
if [[ "$OUTPUT_DIR" != /* ]]; then
  OUTPUT_DIR="$PROJECT_ROOT/$OUTPUT_DIR"
fi

mkdir -p "$OUTPUT_DIR"

pushd "$PROJECT_ROOT" >/dev/null

echo "📦 清理旧构建..."
flutter clean

echo "🧹 清理 Flutter pub cache 中的 im_flutter_sdk..."
flutter pub cache clean im_flutter_sdk 2>/dev/null || true
flutter pub cache clean im_flutter_sdk_ios 2>/dev/null || true
echo "  ✓ 已清理 im_flutter_sdk 相关缓存"

echo "📚 获取依赖..."
flutter pub get

echo "🧹 清理 iOS 依赖缓存..."
cd ios
if [[ -f "Podfile.lock" ]]; then
  rm -f Podfile.lock
  echo "  ✓ 已删除 Podfile.lock"
fi
if [[ -d "Pods" ]]; then
  rm -rf Pods
  echo "  ✓ 已删除 Pods 目录"
fi
if [[ -d ".symlinks" ]]; then
  rm -rf .symlinks
  echo "  ✓ 已删除 .symlinks 目录"
fi
# 清理 Xcode DerivedData 中的相关缓存
if [[ -d "$HOME/Library/Developer/Xcode/DerivedData" ]]; then
  find "$HOME/Library/Developer/Xcode/DerivedData" -name "*Runner*" -type d -exec rm -rf {} + 2>/dev/null || true
  echo "  ✓ 已清理 Xcode DerivedData"
fi
cd ..

echo "📦 重新安装 iOS Pods..."
cd ios
pod deintegrate 2>/dev/null || true
# 清理 CocoaPods 缓存中的 im_flutter_sdk_ios 和 HyphenateChat
pod cache clean im_flutter_sdk_ios --all 2>/dev/null || true
pod cache clean HyphenateChat --all 2>/dev/null || true
# 强制更新 pod 仓库（仅清理时执行一次）
if [[ ! -f ".pod_install_done" ]]; then
  echo "  🔄 更新 CocoaPods 仓库..."
  pod repo update 2>/dev/null || true
  touch .pod_install_done
fi
pod install
cd ..

echo "🚀 开始构建 iOS IPA..."
if [[ ${#EXTRA_ARGS[@]} -gt 0 ]]; then
  flutter build ipa --release "${EXTRA_ARGS[@]}"
else
  flutter build ipa --release
fi

IPA_DIR="$PROJECT_ROOT/build/ios/ipa"
BUILT_IPA="$(ls -t "$IPA_DIR"/*.ipa 2>/dev/null | head -n 1)"

if [[ -z "$BUILT_IPA" ]]; then
  echo "❌ 未找到 IPA，构建失败"
  exit 1
fi

if [[ "$OUTPUT_DIR" == *.ipa ]]; then
  TARGET_PATH="$OUTPUT_DIR"
  # 确保父目录存在且可写
  parent_dir="$(dirname "$TARGET_PATH")"
  if ! mkdir -p "$parent_dir" 2>/dev/null || [[ ! -w "$parent_dir" ]]; then
    echo "❌ 错误: 无法写入到: $TARGET_PATH" >&2
    echo "   使用默认路径: $DEFAULT_OUTPUT_DIR/$(basename "$BUILT_IPA")" >&2
    TARGET_PATH="$DEFAULT_OUTPUT_DIR/$(basename "$BUILT_IPA")"
    mkdir -p "$(dirname "$TARGET_PATH")"
  fi
else
  TARGET_PATH="$OUTPUT_DIR/$(basename "$BUILT_IPA")"
  # 确保目录存在且可写
  if ! mkdir -p "$OUTPUT_DIR" 2>/dev/null || [[ ! -w "$OUTPUT_DIR" ]]; then
    echo "❌ 错误: 无法写入到: $OUTPUT_DIR" >&2
    echo "   使用默认路径: $DEFAULT_OUTPUT_DIR" >&2
    TARGET_PATH="$DEFAULT_OUTPUT_DIR/$(basename "$BUILT_IPA")"
    mkdir -p "$(dirname "$TARGET_PATH")"
  fi
fi

cp "$BUILT_IPA" "$TARGET_PATH"

echo "✅ 构建完成：$TARGET_PATH"
popd >/dev/null