package headless

import (
	"net/url"
	"strings"
	"time"

	"github.com/logrusorgru/aurora"
	"github.com/pkg/errors"

	"github.com/projectdiscovery/gologger"
	"github.com/projectdiscovery/nuclei/v2/pkg/operators/matchers"
	"github.com/projectdiscovery/nuclei/v2/pkg/output"
	"github.com/projectdiscovery/nuclei/v2/pkg/protocols"
)

var _ protocols.Request = &Request{}

// ExecuteWithResults executes the protocol requests and returns results instead of writing them.
func (r *Request) ExecuteWithResults(input string, metadata, previous output.InternalEvent /*TODO review unused parameter*/, callback protocols.OutputEventCallback) error {
	instance, err := r.options.Browser.NewInstance()
	if err != nil {
		r.options.Output.Request(r.options.TemplateID, input, "headless", err)
		r.options.Progress.IncrementFailedRequestsBy(1)
		return errors.Wrap(err, "could get html element")
	}
	defer instance.Close()

	parsed, err := url.Parse(input)
	if err != nil {
		r.options.Output.Request(r.options.TemplateID, input, "headless", err)
		r.options.Progress.IncrementFailedRequestsBy(1)
		return errors.Wrap(err, "could get html element")
	}
	out, page, err := instance.Run(parsed, r.Steps, time.Duration(r.options.Options.PageTimeout)*time.Second)
	if err != nil {
		r.options.Output.Request(r.options.TemplateID, input, "headless", err)
		r.options.Progress.IncrementFailedRequestsBy(1)
		return errors.Wrap(err, "could get html element")
	}
	defer page.Close()

	r.options.Output.Request(r.options.TemplateID, input, "headless", nil)
	r.options.Progress.IncrementRequests()
	gologger.Verbose().Msgf("Sent Headless request to %s", input)

	reqBuilder := &strings.Builder{}
	if r.options.Options.Debug || r.options.Options.DebugRequests {
		gologger.Info().Msgf("[%s] Dumped Headless request for %s", r.options.TemplateID, input)

		for _, act := range r.Steps {
			reqBuilder.WriteString(act.String())
			reqBuilder.WriteString("\n")
		}
		gologger.Print().Msgf("%s", reqBuilder.String())
	}

	var respBody string
	html, err := page.Page().Element("html")
	if err == nil {
		respBody, _ = html.HTML()
	}
	outputEvent := r.responseToDSLMap(respBody, reqBuilder.String(), input, input)
	for k, v := range out {
		outputEvent[k] = v
	}

	event := createEvent(r, input, respBody, outputEvent)

	callback(event)
	return nil
}

// TODO extract duplicated code
func createEvent(request *Request, input string, response string, outputEvent output.InternalEvent) *output.InternalWrappedEvent {
	debugResponse := func(data string) {
		if request.options.Options.Debug || request.options.Options.DebugResponse {
			gologger.Debug().Msgf("[%s] Dumped Headless response for %s", request.options.TemplateID, input)
			gologger.Print().Msgf("%s", data)
		}
	}

	event := &output.InternalWrappedEvent{InternalEvent: outputEvent}
	if request.CompiledOperators != nil {

		matcher := func(data map[string]interface{}, matcher *matchers.Matcher) (bool, []string) {
			isMatch, matched := request.Match(data, matcher)
			var result = response

			if len(matched) != 0 {
				if !request.options.Options.NoColor {
					colorizer := aurora.NewAurora(true)
					for _, currentMatch := range matched {
						result = strings.ReplaceAll(result, currentMatch, colorizer.Green(currentMatch).String())
					}
				}
				debugResponse(result)
			}

			return isMatch, matched
		}

		result, ok := request.CompiledOperators.Execute(outputEvent, matcher, request.Extract)
		if ok && result != nil {
			event.OperatorsResult = result
			event.Results = request.MakeResultEvent(event)
		}
	} else {
		debugResponse(response)
	}
	return event
}