package app

import (
	"encoding/json"
	"fmt"
	"math"
	"testing"
)

// The profile and chat headers label distance, so the single-profile endpoint
// has to answer with the same reading the nearby list gives.
func TestProfileDistanceMySQL(t *testing.T) {
	db := isolatedIMDatabase(t)
	a := &App{db: db, hub: NewHub(), config: Config{Environment: "development", JWTSecret: "isolated-im-regression-secret-only"}}
	// Shenzhen city centre and a point a few kilometres north of it.
	for _, seed := range []struct {
		user     int64
		lat, lng float64
	}{{1, 22.5431, 114.0579}, {2, 22.5731, 114.0579}} {
		if _, err := db.Exec(`INSERT INTO user_location_states(user_id,city_code,latitude,longitude) VALUES(?,'440300',?,?)`, seed.user, seed.lat, seed.lng); err != nil {
			t.Fatal(err)
		}
	}
	profile := func(viewer, target int64) profileView {
		t.Helper()
		var item profileView
		path := fmt.Sprintf("/api/v1/users/%d/profile", target)
		if err := json.Unmarshal(imTestCall(t, a.userProfile, viewer, "GET", path, "", 200), &item); err != nil {
			t.Fatal(err)
		}
		return item
	}

	t.Run("another profile carries the distance between the two locations", func(t *testing.T) {
		item := profile(1, 2)
		if math.Abs(item.Distance-3.34) > 0.1 {
			t.Fatalf("distance = %v km, want about 3.34", item.Distance)
		}
		if item.DistanceText != distanceText(item.Distance) {
			t.Fatalf("distanceText = %q, want %q", item.DistanceText, distanceText(item.Distance))
		}
	})

	t.Run("my own profile has no distance to label", func(t *testing.T) {
		if item := profile(1, 1); item.DistanceText != "" {
			t.Fatalf("distanceText = %q, want empty", item.DistanceText)
		}
	})

	t.Run("a viewer without a location sees no distance", func(t *testing.T) {
		if item := profile(3, 2); item.DistanceText != "" {
			t.Fatalf("distanceText = %q, want empty", item.DistanceText)
		}
	})

	t.Run("hiding distance hides it here too", func(t *testing.T) {
		if _, err := db.Exec(`UPDATE user_privacy_settings SET distance_visible=0 WHERE user_id=2`); err != nil {
			t.Fatal(err)
		}
		if item := profile(1, 2); item.DistanceText != "" || item.Distance != 0 {
			t.Fatalf("hidden distance leaked: %v %q", item.Distance, item.DistanceText)
		}
	})
}