package v2

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"

	"forge.cadoles.com/cadoles/go-emlid/reach/client/protocol/v2/model"
	"github.com/pkg/errors"
)

func (o *Operations) getURL(path string) string {
	return fmt.Sprintf("http://%s%s", o.addr, path)
}

func (o *Operations) GetJSON(path string, dst any) error {
	var res *http.Response

	url := o.getURL(path)
	client := o.getHTTPClient()

	res, err := client.Get(url)
	if err != nil {
		return errors.WithStack(err)
	}

	if res.StatusCode < http.StatusOK || res.StatusCode >= http.StatusBadRequest {
		return errors.Errorf("unexpected http status code %d (%s)", res.StatusCode, res.Status)
	}

	defer func() {
		if err := res.Body.Close(); err != nil {
			errors.WithStack(err)
		}
	}()

	var body []byte

	body, err = io.ReadAll(res.Body)
	if err != nil {
		return errors.WithStack(err)
	}

	if err = json.Unmarshal(body, dst); err != nil {
		return errors.WithStack(err)
	}

	return nil
}

func (o *Operations) PostJSON(path string, data any, dst any) error {

	var res *http.Response

	var buf bytes.Buffer

	encoder := json.NewEncoder(&buf)
	if err := encoder.Encode(data); err != nil {
		return errors.WithStack(err)
	}

	url := o.getURL(path)
	client := o.getHTTPClient()

	res, err := client.Post(url, "application/json", &buf)
	if err != nil {
		return errors.WithStack(err)
	}

	if res.StatusCode < http.StatusOK || res.StatusCode >= http.StatusBadRequest {
		return errors.Errorf("unexpected http status code %d (%s)", res.StatusCode, res.Status)
	}

	defer func() {
		if err := res.Body.Close(); err != nil {
			errors.WithStack(err)
		}
	}()

	var body []byte

	body, err = io.ReadAll(res.Body)
	if err != nil {
		return errors.WithStack(err)
	}

	if err = json.Unmarshal(body, dst); err != nil {
		return errors.WithStack(err)
	}

	return nil
}

func (o *Operations) getHTTPClient() *http.Client {
	o.getClientOnce.Do(func() {
		o.httpClient = &http.Client{
			Transport: &http.Transport{
				Dial: o.dial,
			},
		}
	})

	return o.httpClient
}

func (o *Operations) PostBaseCoordinates(ctx context.Context, base *model.Base) (*model.Base, error) {
	var updated model.Base

	if err := o.PostJSON("/configuration/base_mode/base_coordinates", base, &updated); err != nil {
		return nil, errors.WithStack(err)
	}

	return &updated, nil
}

func (o *Operations) PostDevice(ctx context.Context, device *model.ConfigurationDevice) (*model.ConfigurationDevice, error) {
	var updated model.ConfigurationDevice

	if err := o.PostJSON("/configuration/device", device, &updated); err != nil {
		return nil, errors.WithStack(err)
	}

	return &updated, nil
}

func (o *Operations) GetUpdater(ctx context.Context) (*model.Updater, error) {
	updater := &model.Updater{}
	if err := o.GetJSON("/updater", updater); err != nil {
		return nil, errors.WithStack(err)
	}

	return updater, nil
}

func (o *Operations) GetInfo(ctx context.Context) (*model.Info, error) {
	info := &model.Info{}
	if err := o.GetJSON("/info", info); err != nil {
		return nil, errors.WithStack(err)
	}

	return info, nil
}

func (o *Operations) GetConfiguration(ctx context.Context) (*model.Configuration, error) {
	config := &model.Configuration{}
	if err := o.GetJSON("/configuration", config); err != nil {
		return nil, errors.WithStack(err)
	}

	return config, nil
}