package location

import (
	"context"
	"crypto/tls"
	"net/http"

	"github.com/AFASystems/presence/internal/pkg/apiclient"
	"github.com/AFASystems/presence/internal/pkg/config"
	"github.com/AFASystems/presence/internal/pkg/model"
)

// Inferencer returns inferred positions (e.g. from an AI/ML service).
type Inferencer interface {
	Infer(ctx context.Context, cfg *config.Config) (model.PositionResponse, error)
}

// DefaultInferencer uses apiclient to get token and call the inference API.
type DefaultInferencer struct {
	Client *http.Client
}

// NewDefaultInferencer creates an inferencer with optional TLS skip verify (e.g. from config.TLSInsecureSkipVerify).
func NewDefaultInferencer(skipTLSVerify bool) *DefaultInferencer {
	tr := &http.Transport{}
	if skipTLSVerify {
		tr.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
	}
	return &DefaultInferencer{
		Client: &http.Client{Transport: tr},
	}
}

// Infer gets a token and calls the inference API.
func (d *DefaultInferencer) Infer(ctx context.Context, cfg *config.Config) (model.PositionResponse, error) {
	token, err := apiclient.GetToken(ctx, cfg, d.Client)
	if err != nil {
		return model.PositionResponse{}, err
	}
	return apiclient.InferPosition(token, d.Client, cfg)
}