package agentapi

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

// GuestOOMKillsState mirrors the agent's GET /guest/oom-kills (R-528, agent ≥ the R-528 commit): the kernel's oom_kill
// counter of each of THIS guest's containers, read on the host — Docker's own OOMKilled flag can stay false inside an
// LXC guest. Containers maps the full 64-hex container id to the count for the container's current run.
// Available=false: the guest has no cgroup folder the host can read. An agent that predates the route answers 404 (a
// *StatusError) — the controller then keeps Docker's flag only.
type GuestOOMKillsState struct {
	VMID       int              `json:"vmid"`
	Available  bool             `json:"available"`
	Containers map[string]int64 `json:"containers"`
}

// GuestOOMKills calls GET /guest/oom-kills.
func (c *Client) GuestOOMKills(ctx context.Context) (GuestOOMKillsState, error) {
	var out GuestOOMKillsState
	body, err := c.get(ctx, "/guest/oom-kills")
	if err != nil {
		return out, err
	}
	if err := json.Unmarshal(body, &out); err != nil {
		return out, fmt.Errorf("agentapi: decode /guest/oom-kills: %w", err)
	}
	return out, nil
}