package ragflow

import (
	"context"
	"fmt"
)

// Dataset 结构体
type Dataset struct {
	Id                     string                 `json:"id"`
	Name                   string                 `json:"name"`
	Avatar                 string                 `json:"avatar"`
	TenantId               string                 `json:"tenant_id"`
	Description            string                 `json:"description"`
	Language               string                 `json:"language"`
	EmbeddingModel         string                 `json:"embedding_model"`
	Permission             string                 `json:"permission"`
	DocumentCount          int                    `json:"document_count"`
	ChunkCount             int                    `json:"chunk_count"`
	ParseStatus            string                 `json:"parse_status"`
	CreatedBy              string                 `json:"created_by"`
	CreateTime             int64                  `json:"create_time"`
	UpdateDate             string                 `json:"update_date"`
	UpdateTime             int64                  `json:"update_time"`
	Status                 string                 `json:"status"`
	ChunkMethod            string                 `json:"chunk_method"`
	ParserConfig           map[string]interface{} `json:"parser_config"`
	VectorSimilarityWeight float64                `json:"vector_similarity_weight"`
	SimilarityThreshold    float64                `json:"similarity_threshold"`
	TokenNum               int                    `json:"token_num"`
}

// CreateDatasetReq 创建数据集请求
type CreateDatasetReq struct {
	Name           string                 `json:"name"`
	Avatar         string                 `json:"avatar,omitempty"`
	Description    string                 `json:"description,omitempty"`
	EmbeddingModel string                 `json:"embedding_model,omitempty"`
	Permission     string                 `json:"permission,omitempty"`
	ChunkMethod    string                 `json:"chunk_method,omitempty"`
	ParserConfig   map[string]interface{} `json:"parser_config,omitempty"`
}

// UpdateDatasetReq 更新数据集请求
type UpdateDatasetReq struct {
	Name           string                 `json:"name,omitempty"`
	Avatar         string                 `json:"avatar,omitempty"`
	Description    string                 `json:"description,omitempty"`
	EmbeddingModel string                 `json:"embedding_model,omitempty"`
	Permission     string                 `json:"permission,omitempty"`
	ChunkMethod    string                 `json:"chunk_method,omitempty"`
	PageRank       int                    `json:"pagerank,omitempty"`
	ParserConfig   map[string]interface{} `json:"parser_config,omitempty"`
}

// ListDatasetsReq 列出数据集请求
type ListDatasetsReq struct {
	Page     int    `json:"page,omitempty"`
	PageSize int    `json:"page_size,omitempty"`
	OrderBy  string `json:"orderby,omitempty"`
	Desc     bool   `json:"desc,omitempty"`
	Name     string `json:"name,omitempty"`
	Id       string `json:"id,omitempty"`
}

// ListDatasetsRes 列出数据集响应
type ListDatasetsRes struct {
	Code  int        `json:"code"`
	Data  []*Dataset `json:"data"`
	Total int        `json:"total"`
}

// DeleteDatasetsReq 删除数据集请求
type DeleteDatasetsReq struct {
	Ids []string `json:"ids"`
}

// CreateDataset 创建数据集
func (c *Client) CreateDataset(ctx context.Context, req *CreateDatasetReq) (*Dataset, error) {
	var res struct {
		Code int      `json:"code"`
		Data *Dataset `json:"data"`
		Msg  string   `json:"message"`
	}
	if err := c.request(ctx, "POST", "/api/v1/datasets", req, &res); err != nil {
		return nil, err
	}
	if res.Code != 0 {
		return nil, fmt.Errorf("create dataset failed: %s", res.Msg)
	}
	return res.Data, nil
}

// ListDatasets 列出数据集
func (c *Client) ListDatasets(ctx context.Context, req *ListDatasetsReq) (*ListDatasetsRes, error) {
	// 构建查询参数
	path := "/api/v1/datasets?"
	params := map[string]interface{}{}
	if req.Page > 0 {
		params["page"] = req.Page
	}
	if req.PageSize > 0 {
		params["page_size"] = req.PageSize
	}
	if req.OrderBy != "" {
		params["orderby"] = req.OrderBy
	}
	// desc 默认为 true，如果显式设置为 false 才传递，或者根据 API 行为调整
	// 这里简单处理，如果设置了就传
	if req.Desc {
		params["desc"] = "true"
	} else {
		params["desc"] = "false"
	}
	if req.Name != "" {
		params["name"] = req.Name
	}
	if req.Id != "" {
		params["id"] = req.Id
	}

	// 拼接 query string
	for k, v := range params {
		path += fmt.Sprintf("%s=%v&", k, v)
	}

	var res ListDatasetsRes
	if err := c.request(ctx, "GET", path, nil, &res); err != nil {
		return nil, err
	}
	if res.Code != 0 {
		return nil, fmt.Errorf("list datasets failed: code=%d", res.Code)
	}
	return &res, nil
}

// DeleteDataset 删除数据集
func (c *Client) DeleteDataset(ctx context.Context, ids []string) error {
	req := DeleteDatasetsReq{Ids: ids}
	var res CommonResponse
	if err := c.request(ctx, "DELETE", "/api/v1/datasets", req, &res); err != nil {
		return err
	}
	if !res.IsSuccess() {
		return fmt.Errorf("delete dataset failed: %s", res.Message)
	}
	return nil
}

// UpdateDataset 更新数据集
func (c *Client) UpdateDataset(ctx context.Context, id string, req *UpdateDatasetReq) error {
	var res CommonResponse
	path := fmt.Sprintf("/api/v1/datasets/%s", id)
	if err := c.request(ctx, "PUT", path, req, &res); err != nil {
		return err
	}
	if !res.IsSuccess() {
		return fmt.Errorf("update dataset failed: %s", res.Message)
	}
	return nil
}