package reveil

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"mime/multipart"
	"net/http"
)

type FederationServer struct {
	URL   string `json:"url"`
	Delay uint   `json:"delay"`
}

func (srv *FederationServer) WakeUp(seed int64) error {
	req := map[string]interface{}{"seed": seed}
	req_enc, err := json.Marshal(req)
	if err != nil {
		return err
	}

	res, err := http.Post(srv.URL+"/api/federation/wakeup", "application/json", bytes.NewBuffer(req_enc))
	if err != nil {
		return err
	}
	res.Body.Close()

	return nil
}

func (srv *FederationServer) WakeStop() error {
	res, err := http.Post(srv.URL+"/api/federation/wakeok", "application/json", nil)
	if err != nil {
		return err
	}
	res.Body.Close()

	return nil
}

func (srv *FederationServer) GetMusics() ([]Track, error) {
	res, err := http.Get(srv.URL + "/api/tracks")
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	var tracks []Track
	err = json.NewDecoder(res.Body).Decode(&tracks)
	if err != nil {
		return nil, err
	}

	return tracks, nil
}

func (srv *FederationServer) UpdateTrack(t *Track) error {
	req_enc, err := json.Marshal(t)
	if err != nil {
		return err
	}

	req, err := http.NewRequest("PUT", srv.URL+"/api/tracks/"+t.Id.ToString(), bytes.NewBuffer(req_enc))
	if err != nil {
		return err
	}

	req.Header.Set("Content-Type", "application/json")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		return err
	}
	defer res.Body.Close()

	if res.StatusCode == http.StatusOK {
		var track Track
		err = json.NewDecoder(res.Body).Decode(&track)
		if err != nil {
			return err
		}
	} else {
		var errmsg map[string]string
		err = json.NewDecoder(res.Body).Decode(&errmsg)
		if err != nil {
			return err
		} else {
			return fmt.Errorf("%s", errmsg["errmsg"])
		}
	}

	return nil
}

func (srv *FederationServer) SendTrack(track *Track) error {
	// Retrieve file
	fd, err := track.Open()
	if err != nil {
		return err
	}
	defer fd.Close()

	var b bytes.Buffer
	w := multipart.NewWriter(&b)

	var fw io.Writer
	// Add an image file
	if fw, err = w.CreateFormFile("trackfile", fd.Name()); err != nil {
		return err
	}
	if _, err = io.Copy(fw, fd); err != nil {
		return err
	}

	w.Close()

	//
	req, err := http.NewRequest("POST", srv.URL+"/api/tracks", &b)
	if err != nil {
		return err
	}

	req.Header.Set("Content-Type", w.FormDataContentType())

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		return err
	}

	if res.StatusCode != http.StatusOK {
		return fmt.Errorf("bad status: %s", res.Status)
	}

	return nil
}