package main

import (
	"bufio"
	"fmt"
	"os"
	"path/filepath"

	"github.com/spf13/cobra"

	"git.offline-twitter.com/offline-labs/gas-stack/pkg/codegen"
	"git.offline-twitter.com/offline-labs/gas-stack/pkg/must"
)

var cmdInit = &cobra.Command{
	Use:   "init [path]",
	Short: "Initialize a new project",
	Long:  "Initialize a new Gas Stack project at the given path.  If no path is given, defaults to current directory.",

	Args: cobra.MaximumNArgs(1),

	Run: func(cmd *cobra.Command, args []string) {
		var target string
		if len(args) != 0 {
			target = args[0]
			must.Do(os.MkdirAll(target, 0o755))
			must.Do(os.Chdir(target))
		} else {
			// Default to current directory (".")
			target = must.Get(os.Getwd())
		}

		// Get all the config values
		getVal := func(prompt string, val *string) {
			fmt.Printf("%s (%q): ", prompt, *val)
			scanner := bufio.NewScanner(os.Stdin)
			scanner.Scan()
			input := scanner.Text()
			if input != "" {
				*val = input
			}
		}
		pkgOpts := codegen.PkgOpts{
			ModuleName: must.Get(cmd.Flags().GetString("module")),
			DBFilename: must.Get(cmd.Flags().GetString("db")),
			BinaryName: must.Get(cmd.Flags().GetString("binary")),
		}
		if pkgOpts.ModuleName == "" {
			pkgOpts.ModuleName = filepath.Base(target)
			getVal("module name", &pkgOpts.ModuleName)
		}
		if pkgOpts.DBFilename == "" {
			pkgOpts.DBFilename = pkgOpts.ModuleName + ".db"
			getVal("db name", &pkgOpts.DBFilename)
		}
		if pkgOpts.BinaryName == "" {
			pkgOpts.BinaryName = pkgOpts.ModuleName
			getVal("binary name", &pkgOpts.BinaryName)
		}

		// Run project initialization
		codegen.InitPkg(pkgOpts)
	},
}

func init() {
	cmdInit.Flags().String("module", "", "Module name")
	cmdInit.Flags().String("db", "", "Database filename")
	cmdInit.Flags().String("binary", "", "Binary name")
}