package plane_v1

import (
	"encoding/json"
	"fmt"

	"go.uber.org/zap"
)

// ==================== Work Item Attachment API ====================

// AttachmentCreateResponse 附件创建响应
type AttachmentCreateResponse struct {
	UploadData struct {
		URL    string            `json:"url"`
		Fields map[string]string `json:"fields"`
	} `json:"upload_data"`
	AssetId  string `json:"asset_id"`
	AssetUrl string `json:"asset_url"`
}

// ListWorkItemAttachments 列出工作项附件
func ListWorkItemAttachments(workItemID string) ([]byte, error) {
	path := fmt.Sprintf("/api/v1/workspaces/%s/projects/%s/work-items/%s/attachments/", planeWorkspaceSlug, planeProjectId, workItemID)

	resp, err := planeHttpGet(path)
	if err != nil {
		zap.L().Error("[Plane] ListWorkItemAttachments 请求失败", zap.Error(err))
		return nil, err
	}

	if !isSuccess(resp.StatusCode) {
		zap.L().Error("[Plane] ListWorkItemAttachments 返回错误", zap.String("status", resp.Status))
		return nil, fmt.Errorf("ListWorkItemAttachments 失败: %s", resp.Status)
	}

	return resp.Body, nil
}

// CreateWorkItemAttachment 创建附件（获取预签名 URL）
func CreateWorkItemAttachment(workItemID, fileName, mimeType string, size int64) (*AttachmentCreateResponse, error) {
	path := fmt.Sprintf("/api/v1/workspaces/%s/projects/%s/work-items/%s/attachments/", planeWorkspaceSlug, planeProjectId, workItemID)
	payload := map[string]interface{}{
		"name": fileName,
		"type": mimeType,
		"size": size,
	}

	resp, err := planeHttpPost(path, payload)
	if err != nil {
		zap.L().Error("[Plane] CreateWorkItemAttachment 请求失败", zap.Error(err))
		return nil, err
	}

	if !isSuccess(resp.StatusCode) {
		zap.L().Error("[Plane] CreateWorkItemAttachment 返回错误", zap.String("status", resp.Status), zap.String("body", string(resp.Body)))
		return nil, fmt.Errorf("CreateWorkItemAttachment 失败: %s", resp.Status)
	}

	var result AttachmentCreateResponse
	if err := json.Unmarshal(resp.Body, &result); err != nil {
		return nil, fmt.Errorf("解析附件创建响应失败: %w", err)
	}

	return &result, nil
}

// ConfirmWorkItemAttachment 确认附件上传完成
func ConfirmWorkItemAttachment(workItemID, assetID string) error {
	path := fmt.Sprintf("/api/v1/workspaces/%s/projects/%s/work-items/%s/attachments/%s/", planeWorkspaceSlug, planeProjectId, workItemID, assetID)
	payload := map[string]interface{}{"is_uploaded": true}

	resp, err := planeHttpPatch(path, payload)
	if err != nil {
		zap.L().Error("[Plane] ConfirmWorkItemAttachment 请求失败", zap.Error(err))
		return err
	}

	if resp.StatusCode != 204 && !isSuccess(resp.StatusCode) {
		zap.L().Error("[Plane] ConfirmWorkItemAttachment 返回错误", zap.String("status", resp.Status))
		return fmt.Errorf("ConfirmWorkItemAttachment 失败: %s", resp.Status)
	}

	return nil
}

// DeleteWorkItemAttachment 删除附件
func DeleteWorkItemAttachment(workItemID, assetID string) error {
	path := fmt.Sprintf("/api/v1/workspaces/%s/projects/%s/work-items/%s/attachments/%s/", planeWorkspaceSlug, planeProjectId, workItemID, assetID)

	resp, err := planeHttpDelete(path)
	if err != nil {
		zap.L().Error("[Plane] DeleteWorkItemAttachment 请求失败", zap.Error(err))
		return err
	}

	if resp.StatusCode != 204 {
		zap.L().Error("[Plane] DeleteWorkItemAttachment 返回错误", zap.String("status", resp.Status))
		return fmt.Errorf("DeleteWorkItemAttachment 失败: %s", resp.Status)
	}

	return nil
}

// UploadWorkItemAttachment 完整附件上传流程（获取URL → 上传S3 → 确认）
func UploadWorkItemAttachment(workItemID, fileName, mimeType string, fileData []byte) (*AssetUploadResult, error) {
	fileSize := int64(len(fileData))

	// Step 1: 获取预签名 URL
	createResp, err := CreateWorkItemAttachment(workItemID, fileName, mimeType, fileSize)
	if err != nil {
		return nil, fmt.Errorf("获取上传凭据失败: %w", err)
	}

	// Step 2: 上传到 S3
	if err := uploadToPresignedPost(&CreateAssetResponse{
		UploadData: createResp.UploadData,
		AssetId:    createResp.AssetId,
		AssetUrl:   createResp.AssetUrl,
	}, fileData, mimeType); err != nil {
		return nil, fmt.Errorf("文件上传失败: %w", err)
	}

	// Step 3: 确认上传完成
	if err := ConfirmWorkItemAttachment(workItemID, createResp.AssetId); err != nil {
		return nil, fmt.Errorf("确认上传失败: %w", err)
	}

	zap.L().Info("[Plane] WorkItem Attachment 上传完成",
		zap.String("assetId", createResp.AssetId),
		zap.String("fileName", fileName),
	)

	return &AssetUploadResult{
		AssetId:  createResp.AssetId,
		AssetUrl: createResp.AssetUrl,
	}, nil
}