// Command fixtureplugin is a minimal kandev plugin backend built from
// pkg/pluginsdk, used only by internal/plugins/runtime's tests to exercise
// a real go-plugin subprocess spawn/handshake/DeliverEvent/InvokeTool/
// crash-restart cycle end to end. It is built at test time (see
// internal/plugins/runtime/manager_test.go's TestMain) into a temp binary;
// it is never shipped.
package main

import (
	"context"
	"os"

	"github.com/kandev/kandev/pkg/pluginsdk"
)

// fixturePlugin embeds UnimplementedPlugin (for Host injection via
// SetHost/Host) and overrides every RPC with test-observable behavior:
//   - OnEvent records the last delivered event into Host state, so an
//     out-of-process test can observe delivery by reading that state back
//     through its own fake Host implementation.
//   - InvokeTool echoes its input back as output, except tool name "crash"
//     which exits the process immediately (to exercise crash detection +
//     restart), and "ping-host" which round-trips a GetState call.
//   - HandleWebhook echoes the request back as a response body.
type fixturePlugin struct {
	pluginsdk.UnimplementedPlugin
}

func (p *fixturePlugin) OnEvent(ctx context.Context, e *pluginsdk.Event) error {
	host := p.Host()
	if host == nil {
		return nil
	}
	return host.SetState(ctx, "instance", "", "last_event", map[string]any{
		"event_type": e.EventType,
		"event_id":   e.EventID,
	})
}

func (p *fixturePlugin) InvokeTool(_ context.Context, req *pluginsdk.ToolRequest) (*pluginsdk.ToolResponse, error) {
	if req.ToolName == "crash" {
		os.Exit(1)
	}
	return &pluginsdk.ToolResponse{Output: req.Input}, nil
}

func (p *fixturePlugin) HandleWebhook(_ context.Context, req *pluginsdk.WebhookRequest) (*pluginsdk.WebhookResponse, error) {
	return &pluginsdk.WebhookResponse{Status: 200, Body: req.Body}, nil
}

func main() {
	pluginsdk.Serve(&fixturePlugin{})
}