// Copyright (c) 2026 Probo Inc <hello@probo.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package connector

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// recordingRoundTripper captures the last request it sees and returns a
// canned 200 response without touching the network, so transport
// behaviour can be asserted without tripping SSRF protection.
type recordingRoundTripper struct {
	lastRequest *http.Request
}

func (rt *recordingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
	rt.lastRequest = req

	return &http.Response{
		StatusCode: http.StatusOK,
		Body:       http.NoBody,
		Header:     make(http.Header),
		Request:    req,
	}, nil
}

func TestBasicAuthTransport_RoundTrip(t *testing.T) {
	t.Parallel()

	rec := &recordingRoundTripper{}
	transport := &basicAuthTransport{username: "key_secret", underlying: rec}

	req := httptest.NewRequest(http.MethodGet, "https://api.cursor.com/teams/members", nil)
	_, err := transport.RoundTrip(req)
	require.NoError(t, err)

	require.NotNil(t, rec.lastRequest)
	user, pass, ok := rec.lastRequest.BasicAuth()
	require.True(t, ok, "expected a Basic auth header")
	assert.Equal(t, "key_secret", user)
	assert.Empty(t, pass, "password must be empty")

	// The original request must be left untouched (RoundTrip clones it).
	_, _, originalHasAuth := req.BasicAuth()
	assert.False(t, originalHasAuth, "original request must not be mutated")
}

func TestAPIKeyConnection_Client_BasicAuth(t *testing.T) {
	t.Parallel()

	conn := &APIKeyConnection{APIKey: "key_secret", BasicAuth: true}

	client, err := conn.Client(context.Background())
	require.NoError(t, err)

	transport, ok := client.Transport.(*basicAuthTransport)
	require.Truef(t, ok, "expected *basicAuthTransport, got %T", client.Transport)
	assert.Equal(t, "key_secret", transport.username)
}

func TestBasicAuthUserPassTransport_RoundTrip(t *testing.T) {
	t.Parallel()

	rec := &recordingRoundTripper{}
	transport := &basicAuthUserPassTransport{credential: "key_id:key_secret", underlying: rec}

	req := httptest.NewRequest(http.MethodGet, "https://api.clickhouse.cloud/v1/organizations", nil)
	_, err := transport.RoundTrip(req)
	require.NoError(t, err)

	require.NotNil(t, rec.lastRequest)
	// The stored credential already carries username:password, so it is
	// base64-encoded verbatim and the password survives the round-trip.
	user, pass, ok := rec.lastRequest.BasicAuth()
	require.True(t, ok, "expected a Basic auth header")
	assert.Equal(t, "key_id", user)
	assert.Equal(t, "key_secret", pass)

	// The original request must be left untouched (RoundTrip clones it).
	_, _, originalHasAuth := req.BasicAuth()
	assert.False(t, originalHasAuth, "original request must not be mutated")
}

func TestAPIKeyConnection_Client_BasicAuthUserPass(t *testing.T) {
	t.Parallel()

	conn := &APIKeyConnection{APIKey: "key_id:key_secret", BasicAuthUserPass: true}

	client, err := conn.Client(context.Background())
	require.NoError(t, err)

	transport, ok := client.Transport.(*basicAuthUserPassTransport)
	require.Truef(t, ok, "expected *basicAuthUserPassTransport, got %T", client.Transport)
	assert.Equal(t, "key_id:key_secret", transport.credential)
}

func TestAPIKeyConnection_Client_Header(t *testing.T) {
	t.Parallel()

	conn := &APIKeyConnection{APIKey: "sk-ant-admin", Header: "x-api-key"}

	client, err := conn.Client(context.Background())
	require.NoError(t, err)

	transport, ok := client.Transport.(*apiKeyHeaderTransport)
	require.Truef(t, ok, "expected *apiKeyHeaderTransport, got %T", client.Transport)
	assert.Equal(t, "x-api-key", transport.header)
	assert.Equal(t, "sk-ant-admin", transport.value)
}

func TestAPIKeyConnection_Client_BearerDefault(t *testing.T) {
	t.Parallel()

	conn := &APIKeyConnection{APIKey: "token"}

	client, err := conn.Client(context.Background())
	require.NoError(t, err)

	transport, ok := client.Transport.(*oauth2Transport)
	require.Truef(t, ok, "expected *oauth2Transport, got %T", client.Transport)
	assert.Equal(t, "token", transport.token)
}

func TestSchemeAuthTransport_RoundTrip(t *testing.T) {
	t.Parallel()

	rec := &recordingRoundTripper{}
	transport := &schemeAuthTransport{scheme: "SSWS", token: "00aBcDeF", underlying: rec}

	req := httptest.NewRequest(http.MethodGet, "https://acme.okta.com/api/v1/users", nil)
	_, err := transport.RoundTrip(req)
	require.NoError(t, err)

	require.NotNil(t, rec.lastRequest)
	assert.Equal(t, "SSWS 00aBcDeF", rec.lastRequest.Header.Get("Authorization"))

	// The original request must be left untouched (RoundTrip clones it).
	assert.Empty(t, req.Header.Get("Authorization"), "original request must not be mutated")
}

func TestAPIKeyConnection_Client_Scheme(t *testing.T) {
	t.Parallel()

	conn := &APIKeyConnection{APIKey: "00aBcDeF", Scheme: "SSWS"}

	client, err := conn.Client(context.Background())
	require.NoError(t, err)

	transport, ok := client.Transport.(*schemeAuthTransport)
	require.Truef(t, ok, "expected *schemeAuthTransport, got %T", client.Transport)
	assert.Equal(t, "SSWS", transport.scheme)
	assert.Equal(t, "00aBcDeF", transport.token)
}