package service

import (
	"encoding/json"
	"os"
	"path/filepath"
	"testing"
	"time"

	"github.com/itworx/pulse/internal/application"
	"github.com/itworx/pulse/internal/probe"
)

type serviceScenario struct {
	ID       string `json:"id"`
	Timeline []struct {
		Action  string `json:"action"`
		Payload struct {
			Success bool `json:"success"`
		} `json:"payload"`
	} `json:"timeline"`
}

func TestServiceDownContainerRunningFixtureProjectsDegradedApplication(t *testing.T) {
	fixturePath := filepath.Join("..", "..", "fixtures", "scenarios", "service-down-container-running.json")
	content, err := os.ReadFile(fixturePath)
	if err != nil {
		t.Fatal(err)
	}
	var fixture serviceScenario
	if err := json.Unmarshal(content, &fixture); err != nil {
		t.Fatal(err)
	}
	if fixture.ID != "service-down-container-running" || len(fixture.Timeline) != 2 || fixture.Timeline[0].Action != "set-probe-result" || fixture.Timeline[0].Payload.Success {
		t.Fatalf("fixture does not describe the service outage: %+v", fixture)
	}
	now := time.Date(2026, 8, 2, 12, 0, 0, 0, time.UTC)
	serviceSnapshot, err := BuildSnapshot(now, []ServiceInput{{Service: statusService("fixture-http"), Probes: []ProbeHistory{{ProbeID: "fixture-http", Results: []probe.Result{{ProbeID: "fixture-http", ObservedAt: now.Add(-30 * time.Second), State: StateDown, ErrorClass: "status_not_expected"}}}}}}, StatusPolicy{})
	if err != nil {
		t.Fatal(err)
	}
	if serviceSnapshot.Services[0].State != StateDown {
		t.Fatalf("service outage was not projected: %+v", serviceSnapshot.Services[0])
	}
	applicationSnapshot, err := application.BuildSnapshot(application.Source{ID: "fixture", Type: "scenario", ObservedAt: now, ReceivedAt: now}, []application.DiscoveredApplication{{ID: "fixture-app", Name: "Fixture app", Components: []application.ComponentInput{{ID: "fixture-http", Name: "HTTP", Kind: "service", ContainerState: application.StateHealthy, ServiceState: application.StateDown, Critical: true}}}}, nil, now)
	if err != nil {
		t.Fatal(err)
	}
	if applicationSnapshot.Applications[0].Status != application.StateDegraded || applicationSnapshot.Applications[0].Reasons[0].Code != "service_down" {
		t.Fatalf("running container hid service outage: %+v", applicationSnapshot.Applications[0])
	}
}