package emby

import (
	"context"
	"net/http"
	"strings"
	"testing"
	"time"
)

// The authorisation header is what Emby's dashboard shows for a television, and it is the
// one string the gateway sends to a third party — so both halves are pinned: the client
// name is never the product name, and the version is the set's own build rather than a
// constant that made every device look alike.
func TestAuthHeaderCarriesClientVersion(t *testing.T) {
	client := New("http://emby:8096", "https://emby.example", "MbyATV", "MbyGateway", time.Second)

	req, err := client.newRequest(
		context.Background(), http.MethodGet, "/Items", nil,
		Credentials{DeviceID: "tv-1", DeviceName: `Living "room"`, ClientVersion: "0.2.4"}, nil,
	)
	if err != nil {
		t.Fatal(err)
	}
	got := req.Header.Get("X-Emby-Authorization")
	want := `MediaBrowser Client="MbyATV", Device="Living room", DeviceId="tv-1", Version="0.2.4"`
	if got != want {
		t.Fatalf("auth header =\n  %q\nwant\n  %q", got, want)
	}
}

func TestAuthHeaderFallsBackToGatewayVersion(t *testing.T) {
	client := New("http://emby:8096", "https://emby.example", "MbyATV", "MbyGateway", time.Second)

	req, err := client.newRequest(
		context.Background(), http.MethodGet, "/Items", nil, Credentials{}, nil,
	)
	if err != nil {
		t.Fatal(err)
	}
	got := req.Header.Get("X-Emby-Authorization")
	if strings.Contains(got, `Version=""`) || strings.Contains(got, `Version="1.0"`) {
		t.Fatalf("gateway request reported no usable version: %q", got)
	}
	if !strings.Contains(got, `Version="`+client.gatewayVersion+`"`) {
		t.Fatalf("auth header %q does not carry the gateway build %q", got, client.gatewayVersion)
	}
}

// A request the gateway makes for itself — the sync, the health probe, an operator
// signing into the admin console — is not a television, and Emby's device list said it
// was. It reports the gateway's own name and never falls back to the unnamed-set
// placeholder, which is what made the server read as somebody's TV.
func TestAuthHeaderNamesTheGatewayForItsOwnRequests(t *testing.T) {
	client := New("http://emby:8096", "https://emby.example", "MbyATV", "MbyGateway", time.Second)

	req, err := client.newRequest(
		context.Background(), http.MethodGet, "/Items", nil, Credentials{Gateway: true}, nil,
	)
	if err != nil {
		t.Fatal(err)
	}
	got := req.Header.Get("X-Emby-Authorization")
	if !strings.Contains(got, `Client="MbyGateway"`) {
		t.Fatalf("gateway request did not report the gateway client name: %q", got)
	}
	if strings.Contains(got, "Memby") {
		t.Fatalf("gateway request carried the product name to Emby: %q", got)
	}
}

// A television's request must keep reporting the television's client name, whatever the
// gateway calls itself — the two identities are separate rows in Emby's device list.
func TestAuthHeaderKeepsTelevisionClientName(t *testing.T) {
	client := New("http://emby:8096", "https://emby.example", "MbyATV", "MbyGateway", time.Second)

	req, err := client.newRequest(
		context.Background(), http.MethodGet, "/Items", nil,
		Credentials{DeviceID: "tv-1", DeviceName: "Living room", ClientVersion: "0.2.57"}, nil,
	)
	if err != nil {
		t.Fatal(err)
	}
	if got := req.Header.Get("X-Emby-Authorization"); !strings.Contains(got, `Client="MbyATV"`) {
		t.Fatalf("television request did not report the app client name: %q", got)
	}
}

// A blank gateway name must not silently become the television's, which would put the
// server back in the device list as a set.
func TestGatewayClientNameFallsBackToDefault(t *testing.T) {
	client := New("http://emby:8096", "https://emby.example", "MbyATV", "  ", time.Second)
	if client.gatewayClientName != DefaultGatewayClientName {
		t.Fatalf("gateway client name = %q, want %q",
			client.gatewayClientName, DefaultGatewayClientName)
	}
}