// Package tests contains the per-stage executors the agent runs on the
// host under test. Each stage implements Runner, is called with a
// Context that carries the client + forwarder + run params, and returns
// an Outcome that the caller POSTs to /result.
package tests

import (
	"context"
	"encoding/json"
	"time"
)

// Outcome is what a stage returns; it maps directly to the /result body.
//   - Passed=true and len(Skipped)>0 counts as a pass but surfaces in the
//     tile summary so operators can see "GPU: skipped (no VGA device)".
//   - Message is only used on failure; the UI displays it in the log.
//   - Extras is merged into the posted summary so stages can add
//     their own shape (e.g. Storage returns per-disk probe results).
type Outcome struct {
	Passed  bool
	Message string
	Summary string         // short human-readable one-liner
	Extras  map[string]any // merged into posted summary JSON
}

// MarshalSummary builds the summary JSON body POSTed to /result.
// Stages accumulate fields via Extras; this helper adds "summary" (the
// human-readable line) and serializes.
func (o Outcome) MarshalSummary() (json.RawMessage, error) {
	body := map[string]any{}
	for k, v := range o.Extras {
		body[k] = v
	}
	if o.Summary != "" {
		body["summary"] = o.Summary
	}
	return json.Marshal(body)
}

// Deps bundles what stages need without pulling in the whole agent.
// Logger methods print to stdout + forward to the orchestrator; Sensor
// drops numeric samples; OverrideFlags carries operator-set bypasses.
type Deps struct {
	Info           func(string)
	Warn           func(string)
	Error          func(string)
	Sensor         func(ctx context.Context, samples []Sample) error
	OverrideWipe   bool
	NonDestructive bool           // skip wipe-probe + writes in Storage
	ExpectedDisks  []ExpectedDisk // serials + sizes from host.expected_spec
	StageTimeout   time.Duration
}

// Sample mirrors the server's SensorSample but lives in the tests
// package so probe code doesn't import internal/api.
type Sample struct {
	Kind  string
	Key   string
	Value float64
	Unit  string
}

// ExpectedDisk is the subset of internal/spec.DiskSpec that Storage
// needs: a device allowlist keyed on serial.
type ExpectedDisk struct {
	Serial string
	SizeGB int
}