#!/bin/bash

# iOS 12/13 兼容性检查脚本
# 用于验证项目是否正确配置以支持低版本 iOS

echo "======================================"
echo "iOS 12/13 兼容性检查"
echo "======================================"
echo ""

PROJECT_DIR="$(cd "$(dirname "$0")" && pwd)"
ERRORS=0
WARNINGS=0

# 颜色定义
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# 检查函数
check_passed() {
    echo -e "${GREEN}✓${NC} $1"
}

check_failed() {
    echo -e "${RED}✗${NC} $1"
    ERRORS=$((ERRORS + 1))
}

check_warning() {
    echo -e "${YELLOW}⚠${NC} $1"
    WARNINGS=$((WARNINGS + 1))
}

echo "1. 检查代码中是否还有 Task 关键字（Swift Concurrency）..."
if grep -r "Task\s*{" "$PROJECT_DIR/PlayBTopOn" --include="*.swift" 2>/dev/null | grep -v "//"; then
    check_failed "发现未处理的 Task 调用，这会在 iOS 15 以下崩溃"
else
    check_passed "未发现 Task 调用"
fi

echo ""
echo "2. 检查代码中是否有未保护的 async/await..."
# 检查 async 函数，同时检查前一行是否有 @available 或 #if 保护
UNPROTECTED_ASYNC=0
while IFS= read -r file; do
    if [ -f "$file" ]; then
        # 使用 awk 检查每个 async 函数前是否有保护
        UNPROTECTED=$(awk '
            /func.*async/ {
                protected = 0
                for (i = 1; i <= 3; i++) {
                    line_num = NR - i
                    if (line_num in lines) {
                        if (lines[line_num] ~ /@available/ || lines[line_num] ~ /#if/) {
                            protected = 1
                            break
                        }
                    }
                }
                if (!protected && !/\/\//) print NR": "$0
            }
            { lines[NR] = $0 }
        ' "$file")
        if [ -n "$UNPROTECTED" ]; then
            UNPROTECTED_ASYNC=1
        fi
    fi
done < <(find "$PROJECT_DIR/PlayBTopOn" -name "*.swift" 2>/dev/null)

if [ "$UNPROTECTED_ASYNC" -eq 1 ]; then
    check_warning "发现可能未保护的 async 函数（请手动确认）"
else
    check_passed "所有 async 函数都已保护"
fi

echo ""
echo "3. 检查 AppTrackingTransparency 导入是否使用条件编译..."
# 检查 import AppTrackingTransparency 前面是否有 #if canImport
UNPROTECTED_IMPORTS=0
while IFS= read -r file; do
    if [ -f "$file" ]; then
        UNPROTECTED=$(awk '
            /^import AppTrackingTransparency/ {
                protected = 0
                for (i = 1; i <= 2; i++) {
                    line_num = NR - i
                    if (line_num in lines) {
                        if (lines[line_num] ~ /#if canImport/) {
                            protected = 1
                            break
                        }
                    }
                }
                if (!protected) print FILENAME":"NR": "$0
            }
            { lines[NR] = $0 }
        ' "$file")
        if [ -n "$UNPROTECTED" ]; then
            echo "$UNPROTECTED"
            UNPROTECTED_IMPORTS=1
        fi
    fi
done < <(find "$PROJECT_DIR/PlayBTopOn" -name "*.swift" 2>/dev/null)

if [ "$UNPROTECTED_IMPORTS" -eq 1 ]; then
    check_failed "发现无条件导入 AppTrackingTransparency，应使用 #if canImport()"
else
    check_passed "AppTrackingTransparency 导入已正确保护"
fi

echo ""
echo "4. 检查 Podfile 的最低版本设置..."
if [ -f "$PROJECT_DIR/Podfile" ]; then
    PLATFORM_VERSION=$(grep "platform :ios" "$PROJECT_DIR/Podfile" | grep -o "'[0-9.]*'" | tr -d "'")
    if [ -n "$PLATFORM_VERSION" ]; then
        MAJOR_VERSION=$(echo "$PLATFORM_VERSION" | cut -d. -f1)
        if [ "$MAJOR_VERSION" -le 12 ]; then
            check_passed "Podfile 最低版本: iOS $PLATFORM_VERSION"
        else
            check_warning "Podfile 最低版本较高: iOS $PLATFORM_VERSION，建议设置为 12.0"
        fi
    else
        check_warning "未在 Podfile 中找到 platform 版本设置"
    fi
else
    check_warning "未找到 Podfile 文件"
fi

echo ""
echo "5. 检查 Info.plist 配置..."
if [ -f "$PROJECT_DIR/PlayBTopOn/Info.plist" ]; then
    check_passed "找到 Info.plist"
    
    # 检查是否有 NSUserTrackingUsageDescription（如果要在 iOS 14+ 请求 ATT）
    if grep -q "NSUserTrackingUsageDescription" "$PROJECT_DIR/PlayBTopOn/Info.plist"; then
        check_passed "已配置 NSUserTrackingUsageDescription"
    else
        check_warning "未配置 NSUserTrackingUsageDescription（如需在 iOS 14+ 请求追踪权限，需要添加此项）"
    fi
else
    check_failed "未找到 Info.plist"
fi

echo ""
echo "6. 检查项目配置文件..."
if [ -f "$PROJECT_DIR/PlayBTopOn.xcodeproj/project.pbxproj" ]; then
    # 检查 Deployment Target
    DEPLOYMENT_TARGET=$(grep "IPHONEOS_DEPLOYMENT_TARGET" "$PROJECT_DIR/PlayBTopOn.xcodeproj/project.pbxproj" | head -1 | grep -o "[0-9.]*" | head -1)
    if [ -n "$DEPLOYMENT_TARGET" ]; then
        MAJOR=$(echo "$DEPLOYMENT_TARGET" | cut -d. -f1)
        if [ "$MAJOR" -le 12 ]; then
            check_passed "Deployment Target: iOS $DEPLOYMENT_TARGET"
        else
            check_warning "Deployment Target 较高: iOS $DEPLOYMENT_TARGET，建议设置为 12.0"
        fi
    fi
    
    # 检查 AppTrackingTransparency 是否存在（但无法确定是否为 Optional）
    if grep -q "AppTrackingTransparency" "$PROJECT_DIR/PlayBTopOn.xcodeproj/project.pbxproj"; then
        check_warning "项目中引用了 AppTrackingTransparency - 请手动确认在 Xcode 中设置为 Optional"
    else
        check_warning "项目中未显式链接 AppTrackingTransparency（可能是自动链接）- 请在 Xcode 中确认"
    fi
else
    check_failed "未找到项目配置文件"
fi

echo ""
echo "7. 检查其他可能导致崩溃的代码模式..."
# 检查 @MainActor
if grep -r "@MainActor" "$PROJECT_DIR/PlayBTopOn" --include="*.swift" 2>/dev/null | grep -v "//"; then
    check_warning "发现 @MainActor 注解（需要 iOS 15+），请确认已用 @available 保护"
fi

# 检查 AsyncStream
if grep -r "AsyncStream" "$PROJECT_DIR/PlayBTopOn" --include="*.swift" 2>/dev/null | grep -v "//"; then
    check_warning "发现 AsyncStream（需要 iOS 15+），请确认已用 @available 保护"
fi

echo ""
echo "======================================"
echo "检查完成"
echo "======================================"
echo -e "错误: ${RED}$ERRORS${NC}"
echo -e "警告: ${YELLOW}$WARNINGS${NC}"

if [ $ERRORS -eq 0 ]; then
    echo ""
    echo -e "${GREEN}✓ 代码修改看起来没有问题！${NC}"
    echo ""
    echo "⚠️  重要提醒："
    echo "1. 请在 Xcode 中手动检查 AppTrackingTransparency.framework 是否设置为 Optional"
    echo "   路径: Build Phases -> Link Binary With Libraries -> AppTrackingTransparency.framework -> Status: Optional"
    echo ""
    echo "2. 在 iOS 12/13 真机或模拟器上测试，确保不会崩溃"
    echo ""
    echo "详细配置指南请查看: iOS12_COMPATIBILITY_GUIDE.md"
else
    echo ""
    echo -e "${RED}✗ 发现 $ERRORS 个错误，请修复后再编译${NC}"
fi

exit $ERRORS