package main

import (
    "strings"
    "bytes"
    "fmt"
)

// define command structure
type command struct {
    action  string
    object  string
    extra   string
} // end command structure

// Function to parse a string into a command structure
func CommandParse (CommandString string) (*command) {
    CommandSlice := strings.SplitN(CommandString, " ", 3)
    cmd := new(command)
    if len(CommandSlice) > 0 {
	    cmd.action = strings.ToLower(CommandSlice[0])
	} // if len(CommandSlice) > 0
	if len(CommandSlice) > 1 {
		cmd.object = strings.ToLower(CommandSlice[1])
	} // if len(CommandSlice) > 1
	if len(CommandSlice) > 2 {
		cmd.extra = CommandSlice[2]
	} // if len(CommandSlice) > 2
    return cmd
} // end func ParseCommand

// Do a command
func CommandDo (cmd *command) () {
    //defer DBLog(cmd.action, cmd.object, cmd.extra)
    var buf bytes.Buffer
    if cmd.action == "new" {
        buf.WriteString("Creating a new ")
        if strings.TrimRight(cmd.object, "s") == "note" {
            buf.WriteString("note ")
            if cmd.extra != "" {
                buf.WriteString("with a title of ")
                buf.WriteString(cmd.extra)
            } // if extra not nil
        } // if object == note
        if strings.TrimRight(cmd.object, "s") == "log" {
            buf.WriteString("log entry ")
            if cmd.extra != "" {
                buf.WriteString(" with an extra of ")
                buf.WriteString(cmd.extra)
            } // if cmd.extra != ""
        } // if cmd.object == "log"
    } else if cmd.action == "search" {
        buf.WriteString("Searching ")
        if strings.TrimRight(cmd.object, "s") == "note" {
            buf.WriteString("notes for ")
            if cmd.extra != "" {
                buf.WriteString(strings.TrimLeft(cmd.extra, "for "))
            } // if cmd.extra not nil
        } // if cmd.object == note
        if strings.TrimRight(cmd.object, "s") == "log" {
            buf.WriteString("logs for ")
            if cmd.extra != "" {
                buf.WriteString(strings.TrimLeft(cmd.extra, "for "))
            } // if cmd.extra != ""
      } // if cmd.object == "log"
    } else {
		buf.WriteString("Not a valid command")
	} // else

    fmt.Println(buf.String())
    return
} // end CommandDo