package spot

import (
	"context"
	"encoding/json"
	"net/http"

	"google.golang.org/grpc"
)

var defaultResolvers = []string{
	"http://apresolve.spotify.com",
}

type Client struct {
	Resolver  string
	Endpoints ApResolve

	grpc *grpc.ClientConn
}

type ApResolve struct {
	ApList []string `json:"ap_list"`
}

func NewClient(resolver string) (*Client, error) {
	c := &Client{Resolver: resolver}
	err := c.discover()
	if err != nil {
		return nil, err
	}
	return c, nil
}

func (c *Client) Connect(ctx context.Context) error {
	conn, err := grpc.DialContext(ctx, c.Endpoints.ApList[0])
	if err != nil {
		return err
	}
	c.grpc = conn
	return nil
}
func (c *Client) discover() error {
	resp, err := http.Get(c.Resolver)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	return json.NewDecoder(resp.Body).Decode(&c.Endpoints)
}