package emote

import (
	"io"

	"github.com/go-json-experiment/json"
)

// seventvUser has the fields of a 7TV user model which are relevant to Kaiyan.
type seventvUser struct {
	EmoteSet emoteSet `json:"emote_set"`
}

type emoteSet struct {
	Emotes []seventvEmote `json:"emotes"`
}

type seventvEmote struct {
	ID   string `json:"id"`
	Name string `json:"name"`
	// 7TV provides the CDN URL as well, but it's nested in further objects,
	// not a complete URL, and it's also trivially derivable from the ID.
}

// SevenTVv3 parses the emotes from a 7TV v3/users/{platform}/{platform_id}
// response body.
func SevenTVv3(r io.Reader) ([]Emote, error) {
	var u seventvUser
	if err := json.UnmarshalRead(r, &u); err != nil {
		return nil, err
	}
	ems := make([]Emote, 0, len(u.EmoteSet.Emotes))
	for _, em := range u.EmoteSet.Emotes {
		v := Emote{
			ID:     em.ID,
			Name:   em.Name,
			Source: "7TV",
			Link:   "https://7tv.app/emotes/" + em.ID,
			Image:  "https://cdn.7tv.app/emote/" + em.ID + "/4x.webp",
		}
		ems = append(ems, v)
	}
	return ems, nil
}