package com.mydreamjob.onlineresume;

import com.fasterxml.jackson.databind.*;
import com.mydreamjob.common.api.ApiResponse;
import com.mydreamjob.common.exception.*;
import com.mydreamjob.common.logging.RequestIdAccessor;
import com.mydreamjob.security.CurrentUserAccessor;
import io.swagger.v3.oas.annotations.*;
import io.swagger.v3.oas.annotations.media.Schema;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.validation.Valid;
import jakarta.validation.constraints.*;
import lombok.RequiredArgsConstructor;
import org.springframework.http.*;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import java.nio.charset.StandardCharsets;

@RestController @RequiredArgsConstructor @Validated
@RequestMapping("/profile/me/online-resume")
@Tag(name = "在线简历", description = "仅当前 STUDENT 本人；不修改账号登录信息，不读取附件正文")
public class OnlineResumeController {
    private final OnlineResumeService service;
    private final OnlineResumeDocxWriter docx;
    private final CurrentUserAccessor currentUser;
    private final RequestIdAccessor requestIds;
    private final ObjectMapper mapper;

    @Schema(name = "OnlineResumeEntryRequest")
    @lombok.Data
    public static class EntryRequest {
        @NotNull @PositiveOrZero private Long revision;
        @NotNull @Schema(implementation = Object.class, oneOf = {OnlineResumeContent.Education.class, OnlineResumeContent.Work.class,
                OnlineResumeContent.Project.class, OnlineResumeContent.Skill.class})
        private JsonNode entry;
    }

    @GetMapping
    @Operation(operationId = "getMyOnlineResume", summary = "读取本人完整在线简历", description = "无保存记录时 revision=0，从已有资料、求职偏好和账号联系方式组装，不写库。attachment 仅返回文件元数据及鉴权下载地址。phone/email 为本人简历联系方式，不下发到企业候选人接口。")
    public ApiResponse<OnlineResumeView> get(HttpServletRequest request) {
        return ApiResponse.ok(service.get(currentUser.requireUserId()), requestIds.get(request));
    }
    @PutMapping
    @Operation(operationId = "saveMyOnlineResume", summary = "保存完整在线简历", description = "携带最近 GET 的 revision；content 完整替换，空数组删除该类全部条目，null/空字符串可清空可选字段。新条目省略 id，既有条目保留 id。成功 revision+1；过期 revision 返回409/6002。同步既有个人资料和求职偏好，不改登录手机号/邮箱、附件及隐私授权。")
    public ApiResponse<OnlineResumeView> save(@Valid @RequestBody OnlineResumeSaveRequest body, HttpServletRequest request) {
        return ApiResponse.ok(service.save(currentUser.requireUserId(), body), requestIds.get(request));
    }
    @GetMapping("/{section}")
    @Operation(operationId = "listMyOnlineResumeEntries", summary = "读取某类简历条目", description = "section 仅 education-experiences/work-experiences/project-experiences/skills；revision 从整份简历 GET 获取。")
    public ApiResponse<java.util.List<Object>> list(@PathVariable String section, HttpServletRequest request) {
        java.util.List<Object> result = new java.util.ArrayList<>();
        entries(service.get(currentUser.requireUserId()), section).forEach(result::add);
        return ApiResponse.ok(result, requestIds.get(request));
    }
    @GetMapping("/{section}/{id}")
    @Operation(operationId = "getMyOnlineResumeEntry", summary = "读取本人简历条目详情", description = "只在本人指定类别内寻找条目，不存在返回404/6003。")
    public ApiResponse<Object> detail(@PathVariable String section, @PathVariable String id, HttpServletRequest request) {
        for (JsonNode e : entries(service.get(currentUser.requireUserId()), section))
            if (id.equals(e.path("id").asText())) return ApiResponse.ok(e, requestIds.get(request));
        throw new BusinessException(ErrorCode.ONLINE_RESUME_ENTRY_NOT_FOUND);
    }
    @PostMapping("/{section}")
    @Operation(operationId = "createMyOnlineResumeEntry", summary = "新增简历条目", description = "section 仅 education-experiences/work-experiences/project-experiences/skills；entry 为相应类型，新条目不传 id；携带整份简历 revision，返回更新后的完整简历。")
    public ApiResponse<OnlineResumeView> create(@PathVariable String section, @Valid @RequestBody EntryRequest body, HttpServletRequest request) {
        return ApiResponse.ok(service.editEntry(currentUser.requireUserId(), section, null, body.getRevision(), body.getEntry(), false), requestIds.get(request));
    }
    @PutMapping("/{section}/{id}")
    @Operation(operationId = "updateMyOnlineResumeEntry", summary = "替换简历条目", description = "entry 完整替换本人条目；id 可省略或须与 URL 一致；携带整份简历 revision。")
    public ApiResponse<OnlineResumeView> update(@PathVariable String section, @PathVariable String id, @Valid @RequestBody EntryRequest body, HttpServletRequest request) {
        return ApiResponse.ok(service.editEntry(currentUser.requireUserId(), section, id, body.getRevision(), body.getEntry(), false), requestIds.get(request));
    }
    @DeleteMapping("/{section}/{id}")
    @Operation(operationId = "deleteMyOnlineResumeEntry", summary = "删除简历条目", description = "query revision 必填；不存在返回404/6003，过期版本返回409/6002；返回更新后的完整简历。")
    public ApiResponse<OnlineResumeView> delete(@PathVariable String section, @PathVariable String id,
            @RequestParam @Min(0) Long revision, HttpServletRequest request) {
        return ApiResponse.ok(service.editEntry(currentUser.requireUserId(), section, id, revision, null, true), requestIds.get(request));
    }
    @GetMapping(value = "/download", produces = "application/vnd.openxmlformats-officedocument.wordprocessingml.document")
    @Operation(operationId = "downloadMyOnlineResume", summary = "下载在线简历 DOCX", description = "从当前已保存的在线内容生成 Word 文件，不含上传附件，不写文件、不创建附件版本；浏览器应携带鉴权获取 Blob，未保存编辑需先 PUT。")
    public ResponseEntity<byte[]> download() {
        byte[] bytes = docx.write(service.get(currentUser.requireUserId()).content());
        return ResponseEntity.ok().cacheControl(CacheControl.noStore())
                .header(HttpHeaders.CONTENT_DISPOSITION, ContentDisposition.attachment().filename("个人简历.docx", StandardCharsets.UTF_8).build().toString())
                .contentType(MediaType.parseMediaType("application/vnd.openxmlformats-officedocument.wordprocessingml.document"))
                .contentLength(bytes.length).body(bytes);
    }
    private JsonNode entries(OnlineResumeView view, String section) {
        return mapper.valueToTree(switch (section) {
            case "education-experiences" -> view.content().getEducationExperiences();
            case "work-experiences" -> view.content().getWorkExperiences();
            case "project-experiences" -> view.content().getProjectExperiences();
            case "skills" -> view.content().getSkills();
            default -> throw new BusinessException(ErrorCode.ONLINE_RESUME_ENTRY_NOT_FOUND);
        });
    }
}