package com.tcm.training.admin.app.register.controller;

import com.tcm.training.admin.app.auth.dto.AppSmsCodeSendRequest;
import com.tcm.training.admin.app.auth.vo.AppLoginResponse;
import com.tcm.training.admin.app.auth.vo.AppSmsCodeSendResponse;
import com.tcm.training.admin.app.register.dto.AppRegisterOperatorCompleteRequest;
import com.tcm.training.admin.app.register.dto.AppRegisterOperatorPrepareRequest;
import com.tcm.training.admin.app.register.dto.AppRegisterUserRequest;
import com.tcm.training.admin.app.register.service.AppRegisterService;
import com.tcm.training.admin.app.register.vo.AppRegisterOperatorPrepareResponse;
import com.tcm.training.admin.app.register.vo.AppRegisterRegionDatasetVO;
import com.tcm.training.admin.app.register.vo.AppRegisterRegionOptionVO;
import com.tcm.training.admin.common.ApiResponse;
import com.tcm.training.admin.upload.ObsUploadService;
import com.tcm.training.admin.upload.UploadController;
import com.tcm.training.admin.upload.UploadFileResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.validation.Valid;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * APP 注册接口，统一承接用户注册、经营者注册和注册前附件上传。
 */
@Validated
@RestController
@RequestMapping({"/api/app/register", "/api/v1/app/register"})
public class AppRegisterController {

    private static final long MAX_SIZE = 5 * 1024 * 1024L;
    private static final Set<String> ALLOWED_TYPES = new HashSet<String>(
            Arrays.asList("image/jpeg", "image/png", "image/gif", "image/webp")
    );

    private final AppRegisterService appRegisterService;
    private final ObsUploadService obsUploadService;

    /**
     * 注入注册服务与注册阶段附件上传能力。
     */
    public AppRegisterController(AppRegisterService appRegisterService, ObsUploadService obsUploadService) {
        this.appRegisterService = appRegisterService;
        this.obsUploadService = obsUploadService;
    }

    /**
     * 发送注册短信验证码。
     */
    @PostMapping("/sms-code")
    public ApiResponse<AppSmsCodeSendResponse> sendSmsCode(@Valid @RequestBody AppSmsCodeSendRequest request) {
        return ApiResponse.ok(appRegisterService.sendRegisterCode(request.getPhone()));
    }

    /**
     * 查询 APP 注册三级联动行政区划。
     */
    @GetMapping("/regions")
    public ApiResponse<List<AppRegisterRegionOptionVO>> listRegions(@RequestParam(value = "parentCode", required = false) String parentCode) {
        return ApiResponse.ok(appRegisterService.listRegions(parentCode));
    }

    /**
     * 查询 APP 滚轮地区选择器使用的完整数据集。
     */
    @GetMapping("/region-dataset")
    public ApiResponse<AppRegisterRegionDatasetVO> getRegionDataset() {
        return ApiResponse.ok(appRegisterService.getRegionDataset());
    }

    /**
     * 提交普通用户注册。
     */
    @PostMapping("/user")
    public ApiResponse<AppLoginResponse> registerUser(@Valid @RequestBody AppRegisterUserRequest request) {
        return ApiResponse.ok(appRegisterService.registerUser(request));
    }

    /**
     * 校验经营者第一步并回填海诊通诊所资料。
     */
    @PostMapping("/operator/prepare")
    public ApiResponse<AppRegisterOperatorPrepareResponse> prepareOperator(@Valid @RequestBody AppRegisterOperatorPrepareRequest request) {
        return ApiResponse.ok(appRegisterService.prepareOperatorRegister(request));
    }

    /**
     * 提交经营者第二步并创建本地诊所与诊所用户。
     */
    @PostMapping("/operator/complete")
    public ApiResponse<AppLoginResponse> completeOperator(@Valid @RequestBody AppRegisterOperatorCompleteRequest request) {
        return ApiResponse.ok(appRegisterService.completeOperatorRegister(request));
    }

    /**
     * 上传经营者注册阶段的营业执照图片。
     */
    @PostMapping("/upload/license")
    public ApiResponse<UploadController.UploadResult> uploadLicense(@RequestParam("file") MultipartFile file) throws IOException {
        validateImage(file);
        UploadFileResult uploadResult = obsUploadService.upload(file, "register/license", null);
        return ApiResponse.ok(new UploadController.UploadResult(uploadResult.getUrl(), uploadResult.getFileName()));
    }

    /**
     * 校验营业执照图片的大小与类型。
     */
    private void validateImage(MultipartFile file) {
        if (file == null || file.isEmpty()) {
            throw new IllegalArgumentException("请选择要上传的文件");
        }
        if (file.getSize() > MAX_SIZE) {
            throw new IllegalArgumentException("文件大小超出限制");
        }
        String contentType = file.getContentType();
        if (contentType == null || !ALLOWED_TYPES.contains(contentType)) {
            throw new IllegalArgumentException("仅支持 JPG、PNG、GIF、WebP 格式");
        }
    }
}