// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.

package main

import (
	"context"
	"fmt"
	"io"
	"os"

	"github.com/spf13/cobra"

	pstore "storj.io/storj/pkg/piecestore"
	"storj.io/storj/pkg/process"
)

func main() {
	cobra.EnableCommandSorting = false
	root := &cobra.Command{
		Use:   "piecestore-cli",
		Short: "piecestore example cli",
	}

	root.AddCommand(
		storeMain,
		retrieveMain,
		deleteMain,
	)

	process.Exec(root)
}

var storeMain = &cobra.Command{
	Use:       "store [id] [dataPath] [storeDir]",
	Aliases:   []string{"s"},
	Short:     "Store data by id",
	Args:      cobra.ExactArgs(3),
	ValidArgs: []string{"id", "datapath", "storedir"},

	RunE: func(cmd *cobra.Command, args []string) error {
		id := args[0]
		path := args[1]
		outputDir := args[2]

		file, err := os.Open(path)
		if err != nil {
			return err
		}

		// Close the file when we are done
		defer printError(file.Close)

		fileInfo, err := os.Stat(path)
		if err != nil {
			return err
		}

		if fileInfo.IsDir() {
			return fmt.Errorf("Path (%s) is a directory, not a file", path)
		}

		dataFileChunk, err := pstore.StoreWriter(id, outputDir)
		if err != nil {
			return err
		}

		// Close when finished
		defer printError(dataFileChunk.Close)

		_, err = io.Copy(dataFileChunk, file)

		return err
	},
}

var retrieveMain = &cobra.Command{
	Use:     "retrieve [id] [storeDir]",
	Aliases: []string{"r"},
	Args:    cobra.ExactArgs(2),
	Short:   "Retrieve data by id and print to Stdout",

	RunE: func(cmd *cobra.Command, args []string) error {
		id := args[0]
		path := args[1]

		fileInfo, err := os.Stat(path)
		if err != nil {
			return err
		}

		if !fileInfo.IsDir() {
			return fmt.Errorf("Path (%s) is a file, not a directory", path)
		}

		dataFileChunk, err := pstore.RetrieveReader(context.Background(), id, 0, -1, path)
		if err != nil {
			return err
		}

		// Close when finished
		defer printError(dataFileChunk.Close)

		_, err = io.Copy(os.Stdout, dataFileChunk)
		return err
	},
}

var deleteMain = &cobra.Command{
	Use:     "delete [id] [storeDir]",
	Aliases: []string{"d"},
	Args:    cobra.ExactArgs(2),
	Short:   "Delete data by id",

	RunE: func(cmd *cobra.Command, args []string) error {
		id := args[0]
		directory := args[1]
		return pstore.Delete(id, directory)
	},
}

func printError(fn func() error) {
	err := fn()
	if err != nil {
		fmt.Println(err)
	}
}