package ragflow

import (
	"context"

	"github.com/gogf/gf/v2/errors/gerror"
)

// 聊天助手管理
// 参考: https://ragflow.com.cn/docs/dev/http_api_reference#聊天助手管理

// Chat 聊天助手结构体
type Chat struct {
	Id          string   `json:"id"`
	Name        string   `json:"name"`
	Avatar      string   `json:"avatar"`
	DatasetIds  []string `json:"dataset_ids"`
	Llm         Llm      `json:"llm"`
	Prompt      Prompt   `json:"prompt"`
	Description string   `json:"description"`
	DoRefer     string   `json:"do_refer"`
	Language    string   `json:"language"`
	PromptType  string   `json:"prompt_type"`
	Status      string   `json:"status"`
	TenantId    string   `json:"tenant_id"`
	TopK        int      `json:"top_k"`
	CreateDate  string   `json:"create_date"`
	CreateTime  int64    `json:"create_time"`
	UpdateDate  string   `json:"update_date"`
	UpdateTime  int64    `json:"update_time"`
}

type Llm struct {
	ModelName        string  `json:"model_name,omitempty"`
	Temperature      float64 `json:"temperature,omitempty"`
	TopP             float64 `json:"top_p,omitempty"`
	PresencePenalty  float64 `json:"presence_penalty,omitempty"`
	FrequencyPenalty float64 `json:"frequency_penalty,omitempty"`
}

type Prompt struct {
	SimilarityThreshold      float64    `json:"similarity_threshold,omitempty"`
	KeywordsSimilarityWeight float64    `json:"keywords_similarity_weight,omitempty"`
	Opener                   string     `json:"opener,omitempty"`
	Prompt                   string     `json:"prompt,omitempty"`
	RerankModel              string     `json:"rerank_model,omitempty"`
	TopN                     int        `json:"top_n,omitempty"`
	Variables                []Variable `json:"variables,omitempty"`
	EmptyResponse            string     `json:"empty_response,omitempty"`
}

type Variable struct {
	Key      string `json:"key"`
	Optional bool   `json:"optional"`
}

// CreateChatReq 创建聊天助手请求
type CreateChatReq struct {
	Name       string   `json:"name"`
	Avatar     string   `json:"avatar,omitempty"`
	DatasetIds []string `json:"dataset_ids,omitempty"`
	Llm        *Llm     `json:"llm,omitempty"`
	Prompt     *Prompt  `json:"prompt,omitempty"`
}

// UpdateChatReq 更新聊天助手请求
type UpdateChatReq struct {
	Name       string   `json:"name,omitempty"`
	Avatar     string   `json:"avatar,omitempty"`
	DatasetIds []string `json:"dataset_ids,omitempty"`
	Llm        *Llm     `json:"llm,omitempty"`
	Prompt     *Prompt  `json:"prompt,omitempty"`
}

// ListChatsReq 列出聊天助手请求
type ListChatsReq 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"`
}

// ListChatsRes 列出聊天助手响应
// 注意：API 不返回 total 字段，仅返回 data 数组
type ListChatsRes struct {
	Code int     `json:"code"` // 状态码，0 表示成功
	Data []*Chat `json:"data"` // 聊天助手列表
}

// DeleteChatsReq 删除聊天助手请求
type DeleteChatsReq struct {
	Ids []string `json:"ids"`
}

// CreateChat 创建聊天助手
func (c *Client) CreateChat(ctx context.Context, req *CreateChatReq) (*Chat, error) {
	var res struct {
		Code int    `json:"code"`
		Data *Chat  `json:"data"`
		Msg  string `json:"message"`
	}
	if err := c.request(ctx, "POST", "/api/v1/chats", req, &res); err != nil {
		return nil, err
	}
	if res.Code != 0 {
		return nil, gerror.Newf("create chat failed: %s", res.Msg)
	}
	return res.Data, nil
}

// ListChats 列出聊天助手
func (c *Client) ListChats(ctx context.Context, req *ListChatsReq) (*ListChatsRes, error) {
	path := "/api/v1/chats"
	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
	}
	if req.Desc {
		params["desc"] = "true"
	} else {
		params["desc"] = "false"
	}
	if req.Name != "" {
		params["name"] = req.Name
	}
	if req.Id != "" {
		params["id"] = req.Id
	}

	query := buildQueryString(params)
	if query != "" {
		path += "?" + query
	}

	var res ListChatsRes
	if err := c.request(ctx, "GET", path, nil, &res); err != nil {
		return nil, err
	}
	if res.Code != 0 {
		return nil, gerror.Newf("list chats failed: code=%d", res.Code)
	}
	return &res, nil
}

// DeleteChats 删除聊天助手
func (c *Client) DeleteChats(ctx context.Context, ids []string) (err error) {
	req := DeleteChatsReq{Ids: ids}
	var res CommonResponse
	if err = c.request(ctx, "DELETE", "/api/v1/chats", req, &res); err != nil {
		return
	}
	if !res.IsSuccess() {
		return gerror.Newf("delete chats failed: %s", res.Message)
	}
	return
}

// UpdateChat 更新聊天助手
func (c *Client) UpdateChat(ctx context.Context, id string, req *UpdateChatReq) (err error) {
	var res CommonResponse
	path := "/api/v1/chats/" + id
	if err = c.request(ctx, "PUT", path, req, &res); err != nil {
		return
	}
	if !res.IsSuccess() {
		return gerror.Newf("update chat failed: %s", res.Message)
	}
	return
}