package main

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"testing"
	"time"
)

func TestDetectCollectorPhase(t *testing.T) {
	start := StartInfo{RunID: "run1", StartAt: time.Now().Add(-time.Second)}
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_ = json.NewEncoder(w).Encode(map[string]any{"start": start})
	}))
	defer server.Close()
	client := &http.Client{Timeout: time.Second}
	if got := detectCollectorPhase(context.Background(), client, "before", server.URL, ""); got != "during" {
		t.Fatalf("phase=%s", got)
	}
	output := filepath.Join(t.TempDir(), "coordinator.json")
	if err := os.WriteFile(output, []byte("{}"), 0o600); err != nil {
		t.Fatal(err)
	}
	if got := detectCollectorPhase(context.Background(), client, "during", server.URL, output); got != "after" {
		t.Fatalf("phase=%s", got)
	}
}