package auth

import (
	"net/http"
	"net/http/httptest"
	"testing"
	"time"
)

func protectedTestHandler() http.Handler {
	return RequireSession([]byte(testSecret))(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		claims, ok := ClaimsFromContext(r.Context())
		if !ok {
			http.Error(w, "no claims in context", http.StatusInternalServerError)
			return
		}
		w.Write([]byte(claims.Name))
	}))
}

func TestRequireSession_NoCookie(t *testing.T) {
	req := httptest.NewRequest(http.MethodGet, "/", nil)
	rec := httptest.NewRecorder()
	protectedTestHandler().ServeHTTP(rec, req)
	if rec.Code != http.StatusUnauthorized {
		t.Fatalf("status = %d, want 401", rec.Code)
	}
}

func TestRequireSession_ValidCookie(t *testing.T) {
	cookie, err := MintSessionCookie(Claims{Sub: "u1", Name: "Alice", Email: "alice@example.com"}, "", []byte(testSecret), time.Hour, false)
	if err != nil {
		t.Fatalf("mint: %v", err)
	}
	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.AddCookie(cookie)
	rec := httptest.NewRecorder()
	protectedTestHandler().ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200, body = %s", rec.Code, rec.Body.String())
	}
	if rec.Body.String() != "Alice" {
		t.Fatalf("body = %q, want Alice", rec.Body.String())
	}
}

func TestRequireSession_ExpiredCookie(t *testing.T) {
	cookie, err := MintSessionCookie(Claims{Sub: "u1"}, "", []byte(testSecret), -time.Hour, false)
	if err != nil {
		t.Fatalf("mint: %v", err)
	}
	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.AddCookie(cookie)
	rec := httptest.NewRecorder()
	protectedTestHandler().ServeHTTP(rec, req)
	if rec.Code != http.StatusUnauthorized {
		t.Fatalf("status = %d, want 401", rec.Code)
	}
}

func TestRequireSession_TamperedCookie(t *testing.T) {
	cookie, err := MintSessionCookie(Claims{Sub: "u1"}, "", []byte(testSecret), time.Hour, false)
	if err != nil {
		t.Fatalf("mint: %v", err)
	}
	cookie.Value = flipSignatureChar(cookie.Value)
	req := httptest.NewRequest(http.MethodGet, "/", nil)
	req.AddCookie(cookie)
	rec := httptest.NewRecorder()
	protectedTestHandler().ServeHTTP(rec, req)
	if rec.Code != http.StatusUnauthorized {
		t.Fatalf("status = %d, want 401", rec.Code)
	}
}