package handlers

import (
	"html/template"
	"log/slog"
	"net/http"

	"sneak.berlin/go/webhooker/internal/database"
)

// SetLogForTest replaces the handler's logger, so the handlers_test
// package can assert on what a log line actually contains rather than
// on what it is meant to contain.
func (s *Handlers) SetLogForTest(log *slog.Logger) {
	s.log = log
}

// MaxRenderedBodyBytesForTest exposes the event log's body cap
// to the handlers_test package.
const MaxRenderedBodyBytesForTest = maxRenderedBodyBytes

// DummyVerificationsForTest reports how many equivalent-cost
// verifications were charged for usernames that do not exist. It
// lets a test prove the anti-enumeration path ran without timing
// anything.
func (s *Handlers) DummyVerificationsForTest() uint64 {
	return s.dummyVerifications.Load()
}

// TrimPartialRuneForTest exposes trimPartialRune for use in the
// handlers_test package.
func TrimPartialRuneForTest(b []byte) []byte {
	return trimPartialRune(b)
}

// LoadEventLogViewsForTest exposes loadEventsWithDeliveries for
// use in the handlers_test package. Assertions on the projected
// body need the bytes as loaded: html/template rewrites invalid
// UTF-8 on the way out, so the rendered page cannot show whether
// a binary body survived the projection intact.
func (s *Handlers) LoadEventLogViewsForTest(
	w http.ResponseWriter,
	webhook database.Webhook,
	page int,
) []EventLogView {
	views, _ := s.loadEventsWithDeliveries(w, webhook, nil, page)

	return views
}

// AddTemplateForTest registers a template under a page name so that
// the handlers_test package can drive the render path with a
// template of its own.
func (s *Handlers) AddTemplateForTest(
	pageTemplate string,
	tmpl *template.Template,
) {
	s.templates[pageTemplate] = tmpl
}

// RenderTemplateForTest exposes renderTemplate for use in the
// handlers_test package.
func (s *Handlers) RenderTemplateForTest(
	w http.ResponseWriter,
	r *http.Request,
	pageTemplate string,
	data any,
) {
	s.renderTemplate(w, r, pageTemplate, data)
}

// BuildSlackTargetConfigForTest exposes buildURLTargetConfig
// with the Slack target parameters for use in the
// handlers_test package.
func (s *Handlers) BuildSlackTargetConfigForTest(
	w http.ResponseWriter,
	r *http.Request,
	targetURL string,
) (string, error) {
	return s.buildURLTargetConfig(
		w, r, targetURL, "webhookUrl",
		"Webhook URL is required for Slack targets",
	)
}

// BuildDatabaseTargetConfigForTest exposes
// buildDatabaseTargetConfig for use in the handlers_test
// package.
func (s *Handlers) BuildDatabaseTargetConfigForTest(
	w http.ResponseWriter,
	expiry string,
) (string, error) {
	return s.buildDatabaseTargetConfig(w, expiry)
}