// This file is part of the happyDomain (R) project.
// Copyright (c) 2020-2026 happyDomain
// Authors: Pierre-Olivier Mercier, et al.

package checker

import (
	"context"
	"fmt"

	sdk "git.happydns.org/checker-sdk-go/checker"
)

// loadHTTPData fetches the HTTPData observation. On failure, returns a
// single error CheckState the caller should emit and bail out.
func loadHTTPData(ctx context.Context, obs sdk.ObservationGetter) (*HTTPData, *sdk.CheckState) {
	var data HTTPData
	if err := obs.Get(ctx, ObservationKeyHTTP, &data); err != nil {
		return nil, &sdk.CheckState{
			Status:  sdk.StatusError,
			Message: fmt.Sprintf("failed to load HTTP observation: %v", err),
			Code:    "http.observation_error",
		}
	}
	return &data, nil
}

func passState(code, msg string) sdk.CheckState {
	return sdk.CheckState{Status: sdk.StatusOK, Code: code, Message: msg}
}

func unknownState(code, msg string) sdk.CheckState {
	return sdk.CheckState{Status: sdk.StatusUnknown, Code: code, Message: msg}
}

// probesByScheme returns the subset of probes for a given scheme.
func probesByScheme(probes []HTTPProbe, scheme string) []HTTPProbe {
	var out []HTTPProbe
	for _, p := range probes {
		if p.Scheme == scheme {
			out = append(out, p)
		}
	}
	return out
}

// successfulHTTPSProbes returns HTTPS probes that completed an HTTP
// transaction (status code != 0). These are the probes whose headers we
// can meaningfully inspect.
func successfulHTTPSProbes(probes []HTTPProbe) []HTTPProbe {
	var out []HTTPProbe
	for _, p := range probes {
		if p.Scheme == "https" && p.StatusCode != 0 {
			out = append(out, p)
		}
	}
	return out
}