// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.

package mysql

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

	"github.com/gogf/gf/v2/database/gdb"
	"github.com/gogf/gf/v2/errors/gcode"
	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/text/gregex"
)

// Open creates and returns an underlying sql.DB object for mysql.
// Note that it converts time.Time argument to local timezone in default.
func (d *Driver) Open(config *gdb.ConfigNode) (db *sql.DB, err error) {
	var (
		source               = configNodeToSource(config)
		underlyingDriverName = "mysql"
	)
	if db, err = sql.Open(underlyingDriverName, source); err != nil {
		err = gerror.WrapCodef(
			gcode.CodeDbOperationError, err,
			`sql.Open failed for driver "%s" by source "%s"`, underlyingDriverName, source,
		)
		return nil, err
	}
	return
}

func configNodeToSource(config *gdb.ConfigNode) string {
	var source string
	// [username[:password]@][protocol[(address)]]/dbname[?param1=value1&...&paramN=valueN]
	if config.Link != "" {
		// ============================================================================
		// Deprecated from v2.2.0.
		// ============================================================================
		source = config.Link
		// Custom changing the schema in runtime.
		if config.Name != "" {
			source, _ = gregex.ReplaceString(`/([\w\.\-]+)+`, "/"+config.Name, source)
		}
	} else {
		var portStr string
		if config.Port != "" {
			portStr = ":" + config.Port
		}
		source = fmt.Sprintf(
			"%s:%s@%s(%s%s)/%s?charset=%s",
			config.User, config.Pass, config.Protocol, config.Host, portStr, config.Name, config.Charset,
		)
		if config.Timezone != "" {
			if strings.Contains(config.Timezone, "/") {
				config.Timezone = url.QueryEscape(config.Timezone)
			}
			source = fmt.Sprintf("%s&loc=%s", source, config.Timezone)
		}
		if config.Extra != "" {
			source = fmt.Sprintf("%s&%s", source, config.Extra)
		}
	}
	return source
}