package proxy

import (
	"sync"

	"forge.cadoles.com/arcad/arcast/pkg/browser"
	"github.com/pkg/errors"
)

var (
	ErrNotInitialized = errors.New("not initialized")
)

type Browser struct {
	loadURL  func(url string)
	getURL   func() string
	getTitle func() string

	status browser.Status
	mutex  sync.RWMutex
}

// Load implements browser.Browser.
func (b *Browser) Load(url string) error {
	b.mutex.Lock()
	defer b.mutex.Unlock()

	if b.loadURL == nil {
		return errors.WithStack(ErrNotInitialized)
	}

	b.loadURL(url)
	b.status = browser.StatusCasting

	return nil
}

// Reset implements browser.Browser.
func (b *Browser) Reset(url string) error {
	b.mutex.Lock()
	defer b.mutex.Unlock()

	if b.loadURL == nil {
		return errors.WithStack(ErrNotInitialized)
	}

	b.loadURL(url)
	b.status = browser.StatusIdle

	return nil
}

// Status implements browser.Browser.
func (b *Browser) Status() (browser.Status, error) {
	b.mutex.RLock()
	defer b.mutex.RUnlock()

	return b.status, nil
}

// Title implements browser.Browser.
func (b *Browser) Title() (string, error) {
	b.mutex.RLock()
	defer b.mutex.RUnlock()

	if b.getTitle == nil {
		return "", errors.WithStack(ErrNotInitialized)
	}

	return b.getTitle(), nil
}

// URL implements browser.Browser.
func (b *Browser) URL() (string, error) {
	b.mutex.RLock()
	defer b.mutex.RUnlock()

	if b.getURL == nil {
		return "", errors.WithStack(ErrNotInitialized)
	}

	return b.getURL(), nil
}

func (b *Browser) SetLoadURL(fn func(url string)) {
	b.mutex.Lock()
	defer b.mutex.Unlock()

	b.loadURL = fn
}

func (b *Browser) SetGetTitle(fn func() string) {
	b.mutex.Lock()
	defer b.mutex.Unlock()

	b.getTitle = fn
}

func (b *Browser) SetGetURL(fn func() string) {
	b.mutex.Lock()
	defer b.mutex.Unlock()

	b.getURL = fn
}

func NewBrowser() *Browser {
	return &Browser{}
}

var _ browser.Browser = &Browser{}