package com.yj.earth.business.controller;

import com.yj.earth.annotation.CheckAuth;
import com.yj.earth.auth.AuthInfo;
import com.yj.earth.auth.AuthValidator;
import com.yj.earth.common.util.ApiResponse;
import com.yj.earth.common.util.ServerUniqueIdUtil;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

@Tag(name = "系统设置管理")
@RestController
@RequestMapping("/auth")
public class AuthController {

    // 授权文件存储路径、项目根目录下的 license 目录
    private static final String AUTH_FILE_PATH = "license/yjearth.lic";

    @GetMapping("/info")
    @Operation(summary = "获取系统授权码")
    public ApiResponse info() {
        return ApiResponse.success(ServerUniqueIdUtil.getServerUniqueId());
    }

    @PostMapping("/import")
    @Operation(summary = "导入授权信息")
    public ApiResponse importAuth(@Parameter(description = "授权文件", required = true) @RequestParam("file") MultipartFile file) {
        // 验证文件是否为空
        if (file.isEmpty()) {
            return ApiResponse.failure("请选择授权文件");
        }

        // 验证文件名是否为 yjearth.lic
        String fileName = file.getOriginalFilename();
        if (fileName == null || !fileName.equals("yjearth.lic")) {
            return ApiResponse.failure("请上传 yjearth.lic");
        }

        try {
            // 读取文件内容
            String authContent = new String(file.getBytes(), StandardCharsets.UTF_8).trim();
            // 验证授权内容有效性
            String serverHardwareMd5 = ServerUniqueIdUtil.getServerUniqueId();
            boolean isValid = AuthValidator.validateAuth(authContent, serverHardwareMd5);
            if (!isValid) {
                return ApiResponse.failure("授权文件无效或已过期");
            }
            // 创建目录（如果不存在）
            Path path = Paths.get(AUTH_FILE_PATH);
            if (!Files.exists(path.getParent())) {
                Files.createDirectories(path.getParent());
            }
            // 保存授权文件
            Files.write(path, authContent.getBytes(StandardCharsets.UTF_8));
            return ApiResponse.success(null);
        } catch (Exception e) {
            return ApiResponse.failure("导入授权文件失败：" + e.getMessage());
        }
    }

    @GetMapping("/show")
    @Operation(summary = "查看授权信息")
    public ApiResponse showAuth() {
        try {
            // 检查授权文件是否存在
            Path path = Paths.get(AUTH_FILE_PATH);
            if (!Files.exists(path)) {
                return ApiResponse.failure("请先导入授权");
            }
            // 读取授权文件内容
            String authContent = new String(Files.readAllBytes(path), StandardCharsets.UTF_8);
            // 获取授权详情
            AuthInfo authInfo = AuthValidator.getAuthInfo(authContent);
            return ApiResponse.success(authInfo);
        } catch (Exception e) {
            return ApiResponse.failure("获取授权信息失败：" + e.getMessage());
        }
    }
}