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

package checker

import (
	"context"
	"time"
)

// Target captures everything a Collector needs to probe one logical host.
// It is built once by the orchestrator from CheckerOptions and passed to
// every Collector, so individual collectors don't have to re-parse options
// or re-resolve IPs.
type Target struct {
	Host         string
	IPs          []string
	Timeout      time.Duration
	MaxRedirects int
	UserAgent    string
}

// Collector contributes a typed observation about a Target. Each collector
// owns one slice of the work (root probe, well-known endpoints, CORS
// preflight, etc.) and writes its result under Key() in the final
// payload's Extensions map.
//
// The current orchestrator wires only the root collector and writes its
// result directly under ObservationKeyHTTP for backward compatibility.
// Additional collectors are introduced in step 4; they will populate
// HTTPData.Extensions[Key()] without disturbing existing rules.
type Collector interface {
	Key() string
	Collect(ctx context.Context, t Target) (any, error)
}