// Copyright (c) 2013 Perforce Software. All rights reserved.
//
// Some higher level operations on the "p4 client" command

package p4go

import (
	"bytes"
	"strings"
	"unicode"
	"unicode/utf8"
)

// High level operations around the "p4 client" command
type ClientDAO interface {
	// p4 client -o
	GetClient(id string) (map[string]string, error)
	// p4 client -i
	SaveClient(id string, client map[string]string) error
}

func (dao *p4DaoHandle) GetClient(id string) (map[string]string, error) {
	dao.Clear()

	dao.GetClientApi().SetArgv([]string{"-o", id})
	dao.GetClientApi().Run("client", dao.GetClientUser())

	if dao.HasError() {
		return nil, dao.CreateError()
	}

	client, err := mapTagOutput(dao.GetClientUser().GetOutputInfo())
	if err != nil {
		return nil, err
	}

	return client, nil
}

func (dao *p4DaoHandle) SaveClient(id string, client map[string]string) error {

	// Just to keep it clean, we create a new map with only the "normal" values
	// to add. We'll add the id after this just to make sure it's set correctly
	toSave := map[string]string{}

	mappings := make([][]string, 0) // save all view mappings separately

	for key, value := range client {
		// I'm sure that all valid keys are encoded in UTF-8 ... hm...
		firstRune, runeSize := utf8.DecodeRuneInString(key)
		if !strings.HasPrefix(key, "View") && runeSize == 1 && unicode.IsUpper(firstRune) {
			toSave[key] = value
		} else if strings.HasPrefix(key, "View") {
			mapping, err := splitMapping(value)
			if err != nil {
				return err
			}
			mappings = append(mappings, mapping)
		}
	}

	// The client name comes back as "client" not "Client" in the tagged output
	toSave["Client"] = id

	// Write out the simpler key value pairs
	spec := bytes.Buffer{}
	appendSpecValues(&spec, toSave)

	spec.WriteString("View:\n")

	for _, mapping := range mappings {
		left := enquoteIfNeeded(mapping[0])
		right := enquoteIfNeeded(mapping[1])

		spec.WriteRune('\t')
		spec.WriteString(left)
		spec.WriteRune(' ')
		spec.WriteString(right)
		spec.WriteRune('\n')
	}

	dao.Clear()

	dao.GetClientApi().SetArgv([]string{"-i"})
	dao.GetClientUser().SetInputData(spec.String())

	dao.GetClientApi().Run("client", dao.GetClientUser())

	if dao.HasError() {
		return dao.CreateError()
	}

	return nil
}