package discourse

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

// AboutResponse - Structure of a discourse user api response
type AboutResponse struct {
	About     About    `json:"about"`
	Errors    []string `json:"errors"`
	ErrorType string   `json:"error_type"`
}

// About data for the site
type About struct {
	Version string `json:"version"`
}

// GetAbout - Get a discourse site about
func GetAbout(config APIConfig) (About, error) {
	url := fmt.Sprintf("%s/about.json", config.Endpoint)

	req, _ := newGetRequest(config, url)
	client := getClient(rl)
	response, err := client.Do(req)

	if err != nil {
		return About{}, fmt.Errorf("Unable to connect to discourse server at %s -- %s", url, err)
	}

	if response.StatusCode == http.StatusOK || response.StatusCode == http.StatusForbidden {
		var result *AboutResponse
		json.NewDecoder(response.Body).Decode(&result)

		if result.ErrorType != "" {
			return About{}, fmt.Errorf("Failed to get discourse version. Error: %s", strings.Join(result.Errors, "; "))
		}

		return result.About, nil
	}

	return About{}, fmt.Errorf("Unexpected response from discourse server at %s -- %s", url, response.Status)
}