/*
 * Copyright (c) 2020 Alex aka mailoman <alex@webz.asia>
 *
 *  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.
 *
 *   @author Alex aka mailoman <alex@webz.asia>
 *   @copyright Copyright (c) 2020 Alex aka mailoman <alex@webz.asia>
 *   @since 08.01.2020
 *
 */

package main

import (
	"flag"
	"fmt"
	"os"
	"strings"
	"text/template"

	goose "git.webz.asia/go-migration/gorm-goose/lib/gorm-goose"
	"git.webz.asia/go-migration/gorm-goose/version"
)

// global options. available to any subcommands.
var (
	flagPath     = flag.String("path", "db", "folder containing db info")
	flagEnv      = flag.String("env", "development", "which DB environment to use")
	flagPgSchema = flag.String("pgschema", "", "which postgres-schema to migrate (default = none)")
	showVersion1 = flag.Bool("version", false, "show version")
	showVersion2 = flag.Bool("v", false, "show version")
	showInfo1    = flag.Bool("info", false, "show version")
	showInfo2    = flag.Bool("i", false, "show version")
)

// helper to create a DBConf from the given flags
func dbConfFromFlags() (dbconf *goose.DBConf, err error) {
	return goose.NewDBConf(*flagPath, *flagEnv, *flagPgSchema)
}

var commands = []*Command{
	upCmd,
	downCmd,
	redoCmd,
	statusCmd,
	createCmd,
	dbVersionCmd,
}

func main() {

	flag.Usage = usage
	flag.Parse()

	args := flag.Args()
	if len(args) == 0 || args[0] == "-h" {
		if len(args) == 0 {
			if *showVersion1 || *showVersion2 {
				fmt.Fprintf(os.Stderr, "version: %s\n", version.Version())

				return
			}

			if *showInfo1 || *showInfo2 {
				fmt.Fprintf(os.Stderr, "version: %s\nbuild: %s\ntime: %s\n", version.Version(), version.Build(), version.Time())

				return
			}
		}
		flag.Usage()

		return
	}

	var cmd *Command
	name := args[0]
	for _, c := range commands {
		if strings.HasPrefix(c.Name, name) {
			cmd = c
			break
		}
	}

	if cmd == nil {
		fmt.Printf("error: unknown command %q\n", name)
		flag.Usage()
		os.Exit(1)
	}

	cmd.Exec(args[1:])
}

func usage() {
	fmt.Print(usagePrefix)
	flag.PrintDefaults()
	usageTmpl.Execute(os.Stdout, commands)
}

var usagePrefix = fmt.Sprintf(`
gorm-goose is a database migration management system for Go projects.
version: %s(%s, %s)
Usage:
    gorm-goose [options] <subcommand> [subcommand options]

Options:
`, version.Version(), version.Build(), version.Time())

var usageTmpl = template.Must(template.New("usage").Parse(
	`
Commands:{{range .}}
    {{.Name | printf "%-10s"}} {{.Summary}}{{end}}
`))