package diunwebhook_test

import (
	"bytes"
	"encoding/json"
	"errors"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	diun "awesomeProject/pkg/diunwebhook"
)

func TestUpdateEventAndGetUpdates(t *testing.T) {
	diun.UpdatesReset() // helper to reset global state
	event := diun.DiunEvent{
		DiunVersion: "1.0",
		Hostname:    "host",
		Status:      "new",
		Provider:    "docker",
		Image:       "nginx:latest",
		HubLink:     "https://hub.docker.com/nginx",
		MimeType:    "application/json",
		Digest:      "sha256:abc",
		Created:     time.Now(),
		Platform:    "linux/amd64",
	}
	diun.UpdateEvent(event)
	got := diun.GetUpdates()
	if len(got) != 1 {
		t.Fatalf("expected 1 update, got %d", len(got))
	}
	if got["nginx:latest"].DiunVersion != "1.0" {
		t.Errorf("unexpected DiunVersion: %s", got["nginx:latest"].DiunVersion)
	}
}

func TestWebhookHandler(t *testing.T) {
	diun.UpdatesReset() // reset global state
	event := diun.DiunEvent{
		DiunVersion: "2.0",
		Hostname:    "host2",
		Status:      "updated",
		Provider:    "docker",
		Image:       "alpine:latest",
		HubLink:     "https://hub.docker.com/alpine",
		MimeType:    "application/json",
		Digest:      "sha256:def",
		Created:     time.Now(),
		Platform:    "linux/amd64",
	}
	body, _ := json.Marshal(event)
	req := httptest.NewRequest(http.MethodPost, "/webhook", bytes.NewReader(body))
	rec := httptest.NewRecorder()
	diun.WebhookHandler(rec, req)
	if rec.Code != http.StatusOK {
		t.Errorf("expected status 200, got %d", rec.Code)
	}
	if len(diun.GetUpdatesMap()) != 1 {
		t.Errorf("expected 1 update, got %d", len(diun.GetUpdatesMap()))
	}
}

func TestWebhookHandler_BadRequest(t *testing.T) {
	req := httptest.NewRequest(http.MethodPost, "/webhook", bytes.NewReader([]byte("not-json")))
	rec := httptest.NewRecorder()
	diun.WebhookHandler(rec, req)
	if rec.Code != http.StatusBadRequest {
		t.Errorf("expected 400 for bad JSON, got %d", rec.Code)
	}
}

func TestUpdatesHandler(t *testing.T) {
	diun.UpdatesReset() // reset global state
	event := diun.DiunEvent{Image: "busybox:latest"}
	diun.UpdateEvent(event)
	req := httptest.NewRequest(http.MethodGet, "/api/updates", nil)
	rec := httptest.NewRecorder()
	diun.UpdatesHandler(rec, req)
	if rec.Code != http.StatusOK {
		t.Errorf("expected status 200, got %d", rec.Code)
	}
	var got map[string]diun.DiunEvent
	if err := json.NewDecoder(rec.Body).Decode(&got); err != nil {
		t.Fatalf("failed to decode response: %v", err)
	}
	if _, ok := got["busybox:latest"]; !ok {
		t.Errorf("expected busybox:latest in updates")
	}
}

// Helper for simulating a broken ResponseWriter
// Used in TestUpdatesHandler_EncodeError
type failWriter struct{ http.ResponseWriter }

func (f failWriter) Header() http.Header       { return http.Header{} }
func (f failWriter) Write([]byte) (int, error) { return 0, errors.New("forced error") }
func (f failWriter) WriteHeader(_ int)         {}

func TestUpdatesHandler_EncodeError(t *testing.T) {
	rec := failWriter{httptest.NewRecorder()}
	diun.UpdatesHandler(rec, httptest.NewRequest(http.MethodGet, "/api/updates", nil))
	// No panic = pass
}

func TestMainHandlerIntegration(t *testing.T) {
	diun.UpdatesReset() // reset global state
	// Start test server
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path == "/webhook" {
			diun.WebhookHandler(w, r)
		} else if r.URL.Path == "/api/updates" {
			diun.UpdatesHandler(w, r)
		} else {
			w.WriteHeader(http.StatusNotFound)
		}
	}))
	defer ts.Close()

	// Post event
	event := diun.DiunEvent{Image: "integration:latest"}
	body, _ := json.Marshal(event)
	resp, err := http.Post(ts.URL+"/webhook", "application/json", bytes.NewReader(body))
	if err != nil {
		t.Fatalf("webhook POST failed: %v", err)
	}
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("webhook POST returned status: %d", resp.StatusCode)
	}
	if cerr := resp.Body.Close(); cerr != nil {
		t.Errorf("failed to close response body: %v", cerr)
	}

	// Get updates
	resp, err = http.Get(ts.URL + "/api/updates")
	if err != nil {
		t.Fatalf("GET /api/updates failed: %v", err)
	}
	defer func() {
		if cerr := resp.Body.Close(); cerr != nil {
			t.Errorf("failed to close response body: %v", cerr)
		}
	}()
	var got map[string]diun.DiunEvent
	if err := json.NewDecoder(resp.Body).Decode(&got); err != nil {
		t.Fatalf("decode failed: %v", err)
	}
	if _, ok := got["integration:latest"]; !ok {
		t.Errorf("expected integration:latest in updates")
	}
}