package lib

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

type RedmineFetcher struct {
	Config Config
	Cache  *Cache
}

func (f RedmineFetcher) Fetch() string {
	redmineURL := fmt.Sprintf("%s/issues.json", f.Config.RedmineBaseURL)
	req, _ := http.NewRequest("GET", redmineURL, nil)
	req.Header.Set("X-Redmine-API-Key", f.Config.RedmineKey)
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		return ""
	}
	defer res.Body.Close()

	var r struct {
		Issues []struct {
			ID        int
			UpdatedOn string
			Subject   string
		}
	}
	json.NewDecoder(res.Body).Decode(&r)

	if len(r.Issues) == 0 {
		return ""
	}

	i := r.Issues[0]
	if f.Cache.TryUpdate("redmine", i.UpdatedOn) {
		url := fmt.Sprintf("%s/issues/%d", f.Config.RedmineBaseURL, i.ID)
		return fmt.Sprintf("Redmine: #%d %s <%s>", i.ID, i.Subject, url)
	}
	return ""
}