package agentapi

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

// OperatorReboot calls GET /guest/operator-reboot (D65 = A, agent ≥ the reboot_guest commit): the time the operator
// rebooted THIS guest from the hub, when it is less than a day old; the zero time when there is none. An agent that
// predates the route answers 404 (a *StatusError) — such an agent cannot reboot from the hub either, so there is
// nothing to show and no MinAgent is needed.
func (c *Client) OperatorReboot(ctx context.Context) (time.Time, error) {
	body, err := c.get(ctx, "/guest/operator-reboot")
	if err != nil {
		return time.Time{}, err
	}
	var out struct {
		At string `json:"at"`
	}
	if err := json.Unmarshal(body, &out); err != nil {
		return time.Time{}, fmt.Errorf("agentapi: decode /guest/operator-reboot: %w", err)
	}
	if out.At == "" {
		return time.Time{}, nil
	}
	at, err := time.Parse(time.RFC3339, out.At)
	if err != nil {
		return time.Time{}, fmt.Errorf("agentapi: /guest/operator-reboot: bad time %q", out.At)
	}
	return at, nil
}