package pancakeswapnft

import (
	"bytes"
	"encoding/json"
	"fmt"
	"github.com/pkg/errors"
	"io"
	"net/http"
	"sync"
	"time"
)

type Profile struct {
	Address     string `json:"address"`
	Username    string `json:"username"`
	Leaderboard struct {
		Global   string `json:"global"`
		Team     string `json:"team"`
		Volume   int    `json:"volume"`
		NextRank string `json:"next_rank"`
	} `json:"leaderboard"`
	LeaderboardFantoken struct {
		Global   string `json:"global"`
		Team     string `json:"team"`
		Volume   int    `json:"volume"`
		NextRank string `json:"next_rank"`
	} `json:"leaderboard_fantoken"`
	CreatedAt time.Time `json:"created_at"`
	UpdatedAt time.Time `json:"updated_at"`
}

func getUsernameFromAddress(address string) (string, error) {
	resp, err := http.Get(fmt.Sprintf("https://profile.pancakeswap.com/api/users/%s", address))
	if err != nil {
		return "", err
	}
	defer func(Body io.ReadCloser) {
		_ = Body.Close()
	}(resp.Body)

	raw, err := io.ReadAll(resp.Body)
	if err != nil {
		return "", err
	}
	if resp.StatusCode != http.StatusOK {
		return "", errors.Errorf("non 200 http status : %d / raw : %s", resp.StatusCode, raw)
	}
	var profile Profile
	err = json.NewDecoder(bytes.NewReader(raw)).Decode(&profile)
	if err != nil {
		return "", err
	}

	return profile.Username, nil
}

type ProfileService struct {
	cache map[string]string
	lock  *sync.Mutex
}

func NewProfileService() *ProfileService {
	return &ProfileService{
		cache: make(map[string]string),
		lock:  &sync.Mutex{},
	}
}

func (s *ProfileService) GetUsername(address string) (string, error) {
	s.lock.Lock()
	defer s.lock.Unlock()
	if name, ok := s.cache[address]; ok {
		return name, nil
	}

	name, err := getUsernameFromAddress(address)
	if err != nil {
		return "", err
	}
	s.cache[address] = name

	return name, nil
}