// +build mssql

/*
*
*	Gosora MSSQL Interface
*	Copyright Azareal 2016 - 2020
*
 */
package main

import (
	"database/sql"
	"net/url"

	"github.com/Azareal/Gosora/common"
	c "github.com/Azareal/Gosora/common"
	qgen "github.com/Azareal/Gosora/query_gen"
	_ "github.com/denisenkom/go-mssqldb"
)

var dbInstance string = ""

func init() {
	dbAdapter = "mssql"
	_initDatabase = initMSSQL
}

func initMSSQL() (err error) {
	// TODO: Move this bit to the query gen lib
	query := url.Values{}
	query.Add("database", common.DbConfig.Dbname)
	u := &url.URL{
		Scheme:   "sqlserver",
		User:     url.UserPassword(common.DbConfig.Username, common.DbConfig.Password),
		Host:     common.DbConfig.Host + ":" + common.DbConfig.Port,
		Path:     dbInstance,
		RawQuery: query.Encode(),
	}
	db, err = sql.Open("mssql", u.String())
	if err != nil {
		return err
	}

	// Make sure that the connection is alive
	err = db.Ping()
	if err != nil {
		return err
	}

	// Set the number of max open connections
	db.SetMaxOpenConns(64)
	db.SetMaxIdleConns(32)

	// Only hold connections open for five seconds to avoid accumulating a large number of stale connections
	//db.SetConnMaxLifetime(5 * time.Second)
	db.SetConnMaxLifetime(c.DBTimeout())

	// Build the generated prepared statements, we are going to slowly move the queries over to the query generator rather than writing them all by hand, this'll make it easier for us to implement database adapters for other databases like PostgreSQL, MSSQL, SQlite, etc.
	err = _gen_mssql()
	if err != nil {
		return err
	}

	// Ready the query builder
	qgen.Builder.SetConn(db)
	err = qgen.Builder.SetAdapter("mssql")
	if err != nil {
		return err
	}

	setter, ok := qgen.Builder.GetAdapter().(qgen.SetPrimaryKeys)
	if ok {
		setter.SetPrimaryKeys(dbTablePrimaryKeys)
	}

	// TODO: Is there a less noisy way of doing this for tests?
	/*log.Print("Preparing getActivityFeedByWatcher statement.")
	stmts.getActivityFeedByWatcherStmt, err = db.Prepare("SELECT activity_stream_matches.asid, activity_stream.actor, activity_stream.targetUser, activity_stream.event, activity_stream.elementType, activity_stream.elementID, activity_stream.createdAt FROM [activity_stream_matches] INNER JOIN [activity_stream] ON activity_stream_matches.asid = activity_stream.asid AND activity_stream_matches.watcher != activity_stream.actor WHERE [watcher] = ? ORDER BY activity_stream.asid DESC OFFSET 0 ROWS FETCH NEXT 16 ROWS ONLY")
	if err != nil {
		return err
	}

	log.Print("Preparing getActivityFeedByWatcher statement.")
	stmts.getActivityFeedByWatcherStmt, err = db.Prepare("SELECT activity_stream_matches.asid, activity_stream.actor, activity_stream.targetUser, activity_stream.event, activity_stream.elementType, activity_stream.elementID, activity_stream.createdAt FROM [activity_stream_matches] INNER JOIN [activity_stream] ON activity_stream_matches.asid = activity_stream.asid AND activity_stream_matches.watcher != activity_stream.actor WHERE [watcher] = ? ORDER BY activity_stream.asid DESC OFFSET 0 ROWS FETCH NEXT ? ROWS ONLY")
	if err != nil {
		return err
	}

	log.Print("Preparing getActivityCountByWatcher statement.")
	stmts.getActivityCountByWatcherStmt, err = db.Prepare("SELECT count(*) FROM [activity_stream_matches] INNER JOIN [activity_stream] ON activity_stream_matches.asid = activity_stream.asid AND activity_stream_matches.watcher != activity_stream.actor WHERE [watcher] = ?")
	if err != nil {
		return err
	}
	*/

	return nil
}