package atproto

import (
	"encoding/json"
	"fmt"
	"net/http"
)

// Profile holds resolved ATProto profile information fetched at runtime
type Profile struct {
	DID         string `json:"did"`
	Handle      string `json:"handle"`
	DisplayName string `json:"displayName"`
	Avatar      string `json:"avatar"`
	PDSURL      string `json:"pdsUrl"`
}

const bskyAppViewURL = "https://public.api.bsky.app"

// ResolveProfile fetches a user's profile from the Bluesky public AppView.
func ResolveProfile(did string) (*Profile, error) {
	url := fmt.Sprintf("%s/xrpc/app.bsky.actor.getProfile?actor=%s", bskyAppViewURL, did)

	resp, err := httpClient.Get(url)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("profile fetch failed: %d", resp.StatusCode)
	}

	var result struct {
		DID         string `json:"did"`
		Handle      string `json:"handle"`
		DisplayName string `json:"displayName"`
		Avatar      string `json:"avatar"`
	}

	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
		return nil, err
	}

	return &Profile{
		DID:         result.DID,
		Handle:      result.Handle,
		DisplayName: result.DisplayName,
		Avatar:      result.Avatar,
	}, nil
}

// GetDisplayName returns the best available name for a user
func (p *Profile) GetDisplayName() string {
	if p.DisplayName != "" {
		return p.DisplayName
	}
	if p.Handle != "" && p.Handle != p.DID {
		return p.Handle
	}
	return p.DID
}