package calendartest

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

	calendar "amadan.net/oficina/calendar/internal/calendar"
)

// A native create is a JSON POST, not a page load. Main's scheduledWork
// middleware re-arms the wake after EVERY request, so the reminder the
// native create schedules is armed before anyone opens a page. The
// merge of native/testflight kept that behaviour; this stands in front
// of it.
func TestNativeCreateArmsTheWakeForItsReminder(t *testing.T) {
	control := controlForTest(t)
	app, session := signedIn(t, "someone@example.com")

	rec := getAs(t, app.Handler(), session, "/api/native/session")
	var sess struct {
		DefaultCalendarID int64 `json:"default_calendar_id"`
	}
	if rec.Code != http.StatusOK || json.Unmarshal(rec.Body.Bytes(), &sess) != nil || sess.DefaultCalendarID == 0 {
		t.Fatalf("native session = %d: %s", rec.Code, rec.Body.String())
	}
	if at, _ := control.snapshot(); !at.IsZero() {
		t.Fatalf("timer armed before any work existed: %v", at)
	}

	start := time.Now().UTC().Add(2 * time.Minute)
	body, _ := json.Marshal(map[string]any{
		"calendar_id": sess.DefaultCalendarID, "title": "Native standup", "tz": "UTC",
		"start_local": start.Format("2006-01-02T15:04"), "end_local": start.Add(15 * time.Minute).Format("2006-01-02T15:04"),
	})
	req := httptest.NewRequest(http.MethodPost, "/api/native/events", bytes.NewReader(body))
	req.Header.Set("Origin", calendar.TestOrigin)
	req.Header.Set("Content-Type", "application/json")
	req.AddCookie(session)
	rec = httptest.NewRecorder()
	app.Handler().ServeHTTP(rec, req)
	var saved struct {
		ID      int64  `json:"id"`
		Warning string `json:"warning"`
	}
	if rec.Code != http.StatusOK || json.Unmarshal(rec.Body.Bytes(), &saved) != nil || saved.ID == 0 || saved.Warning != "" {
		t.Fatalf("native create = %d: %s", rec.Code, rec.Body.String())
	}

	expected := app.StoreForTest().NextDueAt(context.Background())
	if expected.IsZero() {
		t.Fatal("native create scheduled no reminder, so this test proves nothing")
	}
	control.waitArmed(t)
	// The default reminder is already overdue, so the wake is "now":
	// no earlier than the due moment and no later than the check.
	if at, _ := control.snapshot(); at.Before(expected) || at.After(time.Now()) {
		t.Fatalf("native POST armed %v, want between %v and now", at, expected)
	}
}