package main

import (
	"os"
	"fmt"
	"log"
	"flag"
//	"strings"
//	"bufio"
	db "sanine.net/git/phlox/db"
)


var Params struct {
	InitDb string
	Db string
}


var p *db.Phlox

type Command struct {
	Name string
	Help string
	subcommands map[string]*Command
	Branch bool
	Execute func([]string)
}

func (c *Command) errNoSubCommand() {
	fmt.Println("error: a subcommand was required but not provided.")
	fmt.Println("available options are:\n")
	for name := range c.subcommands {
		fmt.Printf("\t* %v\n", name)
	}
	fmt.Println()
}

func (c *Command) Parse(args []string) {
	if !c.Branch {
		c.Execute(args)
	} else {
		if len(args) > 0 {
			cn, ok := c.subcommands[args[0]]
			if ok {
				cn.Parse(args[1:])
			} else {
				c.errNoSubCommand()
			}
		} else {
			c.errNoSubCommand()
		}
	}
}


func (c *Command) AddCommand(cn *Command) {
	if c.subcommands == nil {
		c.subcommands = make(map[string]*Command)
	}
	c.subcommands[cn.Name] = cn
}


var parser *Command


func main() {
	p = &db.Phlox{}

	flag.StringVar(&Params.InitDb, "init", "", "initialize a new database at the given path")
	flag.StringVar(&Params.Db, "db", "/etc/phlox/phlox.conf", "open the database at the given path for processing")
	flag.Parse()

	if Params.InitDb != "" {
		// initialize a new db
		err := p.Create(Params.InitDb)
		if err != nil { log.Fatal(err) }
		fmt.Printf("created new database at %v\n", Params.InitDb)
		p.Close()
		os.Exit(0)
	}

	err := p.Open(Params.Db)
	if err != nil {
		log.Fatal(err)
	}
	defer p.Close()

	parser = &Command{Branch: true}
	ListInit(parser)
	CreateInit(parser)
	RmInit(parser)

	parser.Parse(flag.Args())
}