// Copyright 2022 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package testrig

import (
	"fmt"
	"path/filepath"
	"testing"

	"github.com/matrix-org/dendrite/setup/base"
	"github.com/matrix-org/dendrite/setup/config"
	"github.com/matrix-org/dendrite/test"
	"github.com/nats-io/nats.go"
)

func CreateBaseDendrite(t *testing.T, dbType test.DBType) (*base.BaseDendrite, func()) {
	var cfg config.Dendrite
	cfg.Defaults(config.DefaultOpts{
		Generate:       false,
		SingleDatabase: true,
	})
	cfg.Global.JetStream.InMemory = true
	cfg.FederationAPI.KeyPerspectives = nil
	switch dbType {
	case test.DBTypePostgres:
		cfg.Global.Defaults(config.DefaultOpts{ // autogen a signing key
			Generate:       true,
			SingleDatabase: true,
		})
		cfg.MediaAPI.Defaults(config.DefaultOpts{ // autogen a media path
			Generate:       true,
			SingleDatabase: true,
		})
		cfg.SyncAPI.Fulltext.Defaults(config.DefaultOpts{ // use in memory fts
			Generate:       true,
			SingleDatabase: true,
		})
		cfg.Global.ServerName = "test"
		// use a distinct prefix else concurrent postgres/sqlite runs will clash since NATS will use
		// the file system event with InMemory=true :(
		cfg.Global.JetStream.TopicPrefix = fmt.Sprintf("Test_%d_", dbType)
		connStr, close := test.PrepareDBConnectionString(t, dbType)
		cfg.Global.DatabaseOptions = config.DatabaseOptions{
			ConnectionString:       config.DataSource(connStr),
			MaxOpenConnections:     10,
			MaxIdleConnections:     2,
			ConnMaxLifetimeSeconds: 60,
		}
		base := base.NewBaseDendrite(&cfg, base.DisableMetrics)
		return base, func() {
			base.ShutdownDendrite()
			base.WaitForShutdown()
			close()
		}
	case test.DBTypeSQLite:
		cfg.Defaults(config.DefaultOpts{
			Generate:       true,
			SingleDatabase: false,
		})
		cfg.Global.ServerName = "test"

		// use a distinct prefix else concurrent postgres/sqlite runs will clash since NATS will use
		// the file system event with InMemory=true :(
		cfg.Global.JetStream.TopicPrefix = fmt.Sprintf("Test_%d_", dbType)

		// Use a temp dir provided by go for tests, this will be cleanup by a call to t.CleanUp()
		tempDir := t.TempDir()
		cfg.FederationAPI.Database.ConnectionString = config.DataSource(filepath.Join("file://", tempDir, "federationapi.db"))
		cfg.KeyServer.Database.ConnectionString = config.DataSource(filepath.Join("file://", tempDir, "keyserver.db"))
		cfg.MSCs.Database.ConnectionString = config.DataSource(filepath.Join("file://", tempDir, "mscs.db"))
		cfg.MediaAPI.Database.ConnectionString = config.DataSource(filepath.Join("file://", tempDir, "mediaapi.db"))
		cfg.RoomServer.Database.ConnectionString = config.DataSource(filepath.Join("file://", tempDir, "roomserver.db"))
		cfg.SyncAPI.Database.ConnectionString = config.DataSource(filepath.Join("file://", tempDir, "syncapi.db"))
		cfg.UserAPI.AccountDatabase.ConnectionString = config.DataSource(filepath.Join("file://", tempDir, "userapi.db"))
		cfg.RelayAPI.Database.ConnectionString = config.DataSource(filepath.Join("file://", tempDir, "relayapi.db"))

		base := base.NewBaseDendrite(&cfg, base.DisableMetrics)
		return base, func() {
			base.ShutdownDendrite()
			base.WaitForShutdown()
			t.Cleanup(func() {}) // removes t.TempDir, where all database files are created
		}
	default:
		t.Fatalf("unknown db type: %v", dbType)
	}
	return nil, nil
}

func Base(cfg *config.Dendrite) (*base.BaseDendrite, nats.JetStreamContext, *nats.Conn) {
	if cfg == nil {
		cfg = &config.Dendrite{}
		cfg.Defaults(config.DefaultOpts{
			Generate:       true,
			SingleDatabase: false,
		})
	}
	cfg.Global.JetStream.InMemory = true
	cfg.SyncAPI.Fulltext.InMemory = true
	cfg.FederationAPI.KeyPerspectives = nil
	base := base.NewBaseDendrite(cfg, base.DisableMetrics)
	js, jc := base.NATS.Prepare(base.ProcessContext, &cfg.Global.JetStream)
	return base, js, jc
}