package pushserver

import (
	"context"
	"encoding/json"
	"errors"
	"io"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"sync/atomic"
	"testing"
	"time"

	"github.com/dariuszjaniak/warp/server/internal/storage"
)

func TestValidateGatewayURL(t *testing.T) {
	for raw, ok := range map[string]bool{
		"https://push.example/_matrix/push/v1/notify":         true,
		"http://10.0.0.5:5000/_matrix/push/v1/notify":         true,
		"https://push.example/notify":                         false,
		"ftp://push.example/_matrix/push/v1/notify":           false,
		"/_matrix/push/v1/notify":                             false,
		"https://user:pw@push.example/_matrix/push/v1/notify": false,
	} {
		err := validateGatewayURL(raw)
		if (err == nil) != ok {
			t.Errorf("validateGatewayURL(%q) = %v", raw, err)
		}
		if err != nil && !errors.Is(err, ErrInvalidPusher) {
			t.Errorf("validateGatewayURL(%q) = %v, not ErrInvalidPusher", raw, err)
		}
	}
}

func TestGatewayRetriesServerErrorsAndNotRefusals(t *testing.T) {
	saved := gatewayRetryDelay
	gatewayRetryDelay = func(int) time.Duration { return time.Millisecond }
	t.Cleanup(func() { gatewayRetryDelay = saved })

	var calls atomic.Int32
	status := atomic.Int32{}
	status.Store(http.StatusInternalServerError)
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		calls.Add(1)
		_, _ = io.Copy(io.Discard, r.Body)
		w.WriteHeader(int(status.Load()))
		_, _ = w.Write([]byte(`{"rejected":[]}`))
	}))
	defer ts.Close()

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	g := newGateway(gatewayOptions{
		client:   ts.Client(),
		rejected: func(string, string, string) {},
		log:      slog.New(slog.DiscardHandler),
	})
	g.ctx = ctx

	job := pushJob{
		localpart: "alice",
		pusher: storage.Pusher{AppID: "a", PushKey: "k",
			Data: json.RawMessage(`{"url":"` + ts.URL + `/_matrix/push/v1/notify"}`)},
		note: notificationPush{EventID: "$e", RoomID: "!r:x"},
	}

	g.deliver(job)
	if got := calls.Load(); got != gatewayAttempts {
		t.Errorf("a failing gateway was tried %d times, want %d", got, gatewayAttempts)
	}

	calls.Store(0)
	status.Store(http.StatusBadRequest)
	g.deliver(job)
	if got := calls.Load(); got != 1 {
		t.Errorf("a refusing gateway was tried %d times, want 1", got)
	}
}

func TestGatewayPayloadLeavesTheURLOut(t *testing.T) {
	g := newGateway(gatewayOptions{includeContent: false, log: slog.New(slog.DiscardHandler)})
	job := pushJob{
		pusher: storage.Pusher{AppID: "a", PushKey: "k", PushKeyTSMS: 5000,
			Data: json.RawMessage(`{"url":"https://p.example/_matrix/push/v1/notify","extra":1}`)},
		note: notificationPush{EventID: "$e", Content: json.RawMessage(`{"body":"secret"}`)},
	}
	raw, err := g.payload(job, pusherData{})
	if err != nil {
		t.Fatal(err)
	}
	var body struct {
		Notification struct {
			Content json.RawMessage `json:"content"`
			Devices []struct {
				PushKeyTS int64          `json:"pushkey_ts"`
				Data      map[string]any `json:"data"`
			} `json:"devices"`
		} `json:"notification"`
	}
	if err := json.Unmarshal(raw, &body); err != nil {
		t.Fatal(err)
	}
	d := body.Notification.Devices[0]
	if body.Notification.Content != nil || d.Data["url"] != nil || d.Data["extra"] != float64(1) || d.PushKeyTS != 5 {
		t.Errorf("payload = %s", raw)
	}
}