package com.ga.common.upload;

import com.ga.common.annotation.RequirePermission;
import com.ga.common.model.ApiResponse;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.validation.Valid;
import lombok.Data;
import lombok.RequiredArgsConstructor;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/upload-templates")
@Tag(name = "업로드 템플릿 관리")
@RequiredArgsConstructor
public class UploadController {

    private final UploadTemplateService templateService;
    private final UploadService uploadService;

    /* ==========================================================
       템플릿 CRUD
       ========================================================== */
    @GetMapping
    @RequirePermission(menu = "DATA_UPLOAD", perm = "READ")
    public ApiResponse<List<UploadTemplateVO>> list(@RequestParam(required = false) String category,
                                                    @RequestParam(required = false) String companyCode) {
        return ApiResponse.ok(templateService.list(category, companyCode));
    }

    @GetMapping("/{id}")
    @RequirePermission(menu = "DATA_UPLOAD", perm = "READ")
    public ApiResponse<TemplateDetailResp> detail(@PathVariable Long id) {
        TemplateDetailResp r = new TemplateDetailResp();
        r.setTemplate(templateService.get(id));
        r.setColumns(templateService.getColumns(id));
        return ApiResponse.ok(r);
    }

    @PostMapping
    @RequirePermission(menu = "DATA_UPLOAD", perm = "CREATE")
    public ApiResponse<Long> create(@Valid @RequestBody TemplateSaveReq req) {
        return ApiResponse.ok(templateService.create(req.getTemplate(), req.getColumns()));
    }

    @PutMapping("/{id}")
    @RequirePermission(menu = "DATA_UPLOAD", perm = "UPDATE")
    public ApiResponse<Void> update(@PathVariable Long id, @Valid @RequestBody TemplateSaveReq req) {
        templateService.update(id, req.getTemplate(), req.getColumns());
        return ApiResponse.ok();
    }

    @DeleteMapping("/{id}")
    @RequirePermission(menu = "DATA_UPLOAD", perm = "DELETE")
    public ApiResponse<Void> delete(@PathVariable Long id) {
        templateService.delete(id);
        return ApiResponse.ok();
    }

    /* ==========================================================
       업로드 처리
       ========================================================== */
    @PostMapping("/{templateCode}/upload")
    @RequirePermission(menu = "DATA_UPLOAD", perm = "CREATE")
    public ApiResponse<UploadResultResp> upload(@PathVariable String templateCode,
                                                @RequestParam MultipartFile file) {
        return ApiResponse.ok(uploadService.processUpload(templateCode, file));
    }

    @PostMapping("/{templateCode}/preview")
    @RequirePermission(menu = "DATA_UPLOAD", perm = "READ")
    public ApiResponse<List<Map<String, Object>>> preview(@PathVariable String templateCode,
                                                          @RequestParam MultipartFile file,
                                                          @RequestParam(defaultValue = "5") int rows) {
        return ApiResponse.ok(uploadService.preview(templateCode, file, rows));
    }

    /* ==========================================================
       요청/응답 DTO
       ========================================================== */
    @Data
    public static class TemplateSaveReq {
        private UploadTemplateVO template;
        private List<UploadTemplateColumnVO> columns;
    }

    @Data
    public static class TemplateDetailResp {
        private UploadTemplateVO template;
        private List<UploadTemplateColumnVO> columns;
    }
}