package replicate

import (
	"fmt"
	"io"
	"net/http"
	"slices"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/pkg/errors"
	"github.com/songquanpeng/one-api/common/logger"
	"github.com/songquanpeng/one-api/relay/adaptor"
	"github.com/songquanpeng/one-api/relay/adaptor/openai"
	"github.com/songquanpeng/one-api/relay/meta"
	"github.com/songquanpeng/one-api/relay/model"
	"github.com/songquanpeng/one-api/relay/relaymode"
)

type Adaptor struct {
	meta *meta.Meta
}

// ConvertImageRequest implements adaptor.Adaptor.
func (*Adaptor) ConvertImageRequest(request *model.ImageRequest) (any, error) {
	return DrawImageRequest{
		Input: ImageInput{
			Steps:           25,
			Prompt:          request.Prompt,
			Guidance:        3,
			Seed:            int(time.Now().UnixNano()),
			SafetyTolerance: 5,
			NImages:         1, // replicate will always return 1 image
			Width:           1440,
			Height:          1440,
			AspectRatio:     "1:1",
		},
	}, nil
}

func (a *Adaptor) ConvertRequest(c *gin.Context, relayMode int, request *model.GeneralOpenAIRequest) (any, error) {
	return nil, errors.New("not implemented")
}

func (a *Adaptor) Init(meta *meta.Meta) {
	a.meta = meta
}

func (a *Adaptor) GetRequestURL(meta *meta.Meta) (string, error) {
	if !slices.Contains(ModelList, meta.OriginModelName) {
		return "", errors.Errorf("model %s not supported", meta.OriginModelName)
	}

	return fmt.Sprintf("https://api.replicate.com/v1/models/%s/predictions", meta.OriginModelName), nil
}

func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Request, meta *meta.Meta) error {
	adaptor.SetupCommonRequestHeader(c, req, meta)
	req.Header.Set("Authorization", "Bearer "+meta.APIKey)
	return nil
}

func (a *Adaptor) DoRequest(c *gin.Context, meta *meta.Meta, requestBody io.Reader) (*http.Response, error) {
	logger.Info(c, "send image request to replicate")
	return adaptor.DoRequestHelper(a, c, meta, requestBody)
}

func (a *Adaptor) DoResponse(c *gin.Context, resp *http.Response, meta *meta.Meta) (usage *model.Usage, err *model.ErrorWithStatusCode) {
	switch meta.Mode {
	case relaymode.ImagesGenerations:
		err, usage = ImageHandler(c, resp)
	default:
		err = openai.ErrorWrapper(errors.New("not implemented"), "not_implemented", http.StatusInternalServerError)
	}

	return
}

func (a *Adaptor) GetModelList() []string {
	return ModelList
}

func (a *Adaptor) GetChannelName() string {
	return "replicate"
}