package relay

import (
	"bytes"
	"fmt"
	"io"
	"net/http"
	"one-api/common"
	"one-api/dto"
	relaycommon "one-api/relay/common"
	"one-api/relay/helper"
	"one-api/service"
	"one-api/setting/model_setting"
	"one-api/types"

	"github.com/gin-gonic/gin"
)

func getRerankPromptToken(rerankRequest dto.RerankRequest) int {
	token := service.CountTokenInput(rerankRequest.Query, rerankRequest.Model)
	for _, document := range rerankRequest.Documents {
		tkm := service.CountTokenInput(document, rerankRequest.Model)
		token += tkm
	}
	return token
}

func RerankHelper(c *gin.Context, info *relaycommon.RelayInfo) (newAPIError *types.NewAPIError) {

	rerankRequest, ok := info.Request.(*dto.RerankRequest)
	if !ok {
		common.FatalLog(fmt.Sprintf("invalid request type, expected dto.RerankRequest, got %T", info.Request))
	}

	err := helper.ModelMappedHelper(c, info, rerankRequest)
	if err != nil {
		return types.NewError(err, types.ErrorCodeChannelModelMappedError, types.ErrOptionWithSkipRetry())
	}

	adaptor := GetAdaptor(info.ApiType)
	if adaptor == nil {
		return types.NewError(fmt.Errorf("invalid api type: %d", info.ApiType), types.ErrorCodeInvalidApiType, types.ErrOptionWithSkipRetry())
	}
	adaptor.Init(info)

	var requestBody io.Reader
	if model_setting.GetGlobalSettings().PassThroughRequestEnabled || info.ChannelSetting.PassThroughBodyEnabled {
		body, err := common.GetRequestBody(c)
		if err != nil {
			return types.NewErrorWithStatusCode(err, types.ErrorCodeReadRequestBodyFailed, http.StatusBadRequest, types.ErrOptionWithSkipRetry())
		}
		requestBody = bytes.NewBuffer(body)
	} else {
		convertedRequest, err := adaptor.ConvertRerankRequest(c, info.RelayMode, *rerankRequest)
		if err != nil {
			return types.NewError(err, types.ErrorCodeConvertRequestFailed, types.ErrOptionWithSkipRetry())
		}
		jsonData, err := common.Marshal(convertedRequest)
		if err != nil {
			return types.NewError(err, types.ErrorCodeConvertRequestFailed, types.ErrOptionWithSkipRetry())
		}

		// apply param override
		if len(info.ParamOverride) > 0 {
			jsonData, err = relaycommon.ApplyParamOverride(jsonData, info.ParamOverride)
			if err != nil {
				return types.NewError(err, types.ErrorCodeChannelParamOverrideInvalid, types.ErrOptionWithSkipRetry())
			}
		}

		if common.DebugEnabled {
			println(fmt.Sprintf("Rerank request body: %s", string(jsonData)))
		}
		requestBody = bytes.NewBuffer(jsonData)
	}

	resp, err := adaptor.DoRequest(c, info, requestBody)
	if err != nil {
		return types.NewOpenAIError(err, types.ErrorCodeDoRequestFailed, http.StatusInternalServerError)
	}

	statusCodeMappingStr := c.GetString("status_code_mapping")
	var httpResp *http.Response
	if resp != nil {
		httpResp = resp.(*http.Response)
		if httpResp.StatusCode != http.StatusOK {
			newAPIError = service.RelayErrorHandler(httpResp, false)
			// reset status code 重置状态码
			service.ResetStatusCode(newAPIError, statusCodeMappingStr)
			return newAPIError
		}
	}

	usage, newAPIError := adaptor.DoResponse(c, httpResp, info)
	if newAPIError != nil {
		// reset status code 重置状态码
		service.ResetStatusCode(newAPIError, statusCodeMappingStr)
		return newAPIError
	}
	postConsumeQuota(c, info, usage.(*dto.Usage), "")
	return nil
}
