package extractor

import (
	"fmt"
	"strings"

	"github.com/playwright-community/playwright-go"
)

type Node interface {
	Content() (string, error)
	Text() (string, error)
	Attr(name string) (string, error)
	Screenshot() ([]byte, error)

	Type(input string) error
	Click() error

	Select(selector string) Nodes
	SelectFirst(selector string) Node

	ForEach(selector string, fn func(Node) error) error

	SetHidden(val bool) error
	SetAttribute(name, value string) error
}

type node struct {
	locator playwright.Locator
}

func (n node) Type(input string) error {
	return n.locator.Type(input)
}

func (n node) Click() error {
	return n.locator.Click()
}

func (n node) Content() (string, error) {
	return n.locator.TextContent()
}

func (n node) Text() (string, error) {
	return n.locator.InnerText()
}

func (n node) Attr(name string) (string, error) {
	return n.locator.GetAttribute(name)
}

func (n node) Screenshot() ([]byte, error) {
	return n.locator.Screenshot()
}

func (n node) Select(selector string) Nodes {
	elements, err := n.locator.Locator(selector).All()
	if err != nil {
		return nil
	}

	var nodes Nodes
	for _, element := range elements {
		nodes = append(nodes, node{locator: element})
	}

	return nodes
}

func (n node) SelectFirst(selector string) Node {
	return n.Select(selector).First()
}

func (n node) ForEach(selector string, fn func(Node) error) error {
	elements, err := n.locator.Locator(selector).All()
	if err != nil {
		return err
	}

	for _, element := range elements {
		if err := fn(node{locator: element}); err != nil {
			return err
		}
	}

	return nil
}

func (n node) SetHidden(val bool) error {
	_, err := n.locator.Evaluate(fmt.Sprintf(`(element) => element.hidden = %t;`, val), nil)
	return err
}

func escapeJavaScript(s string) string {
	return strings.Replace(strings.Replace(s, "\\", "\\\\", -1), "'", "\\'", -1)
}

func (n node) SetAttribute(name, value string) error {
	_, err := n.locator.Evaluate(fmt.Sprintf(`(element) => element.setAttribute('%s', '%s');`, escapeJavaScript(name), escapeJavaScript(value)), nil)
	return err
}