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//
//  dolmetschctl
//
//
//  Copyright (C) 2019 Christian Pointner <equinox@spreadspace.org>
//
//  This file is part of dolmetschctl.
//
//  dolmetschctl is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  any later version.
//
//  dolmetschctl is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with dolmetschctl. If not, see <http://www.gnu.org/licenses/>.
//

package types

import (
	"fmt"
)

// State Machine

type State int

const (
	StateNew = iota
	StateSettling
	StateSettled
)

func (s State) String() string {
	switch s {
	case StateNew:
		return "new"
	case StateSettling:
		return "settling"
	case StateSettled:
		return "settled"
	default:
		return "unknown"
	}
}

func (s *State) FromString(str string) error {
	switch str {
	case "new":
		*s = StateNew
	case "settling":
		*s = StateSettling
	case "settled":
		*s = StateSettled
	default:
		return fmt.Errorf("invalid state '%s'", str)
	}
	return nil
}

func (s State) MarshalText() (data []byte, err error) {
	data = []byte(s.String())
	return
}

func (s *State) UnmarshalText(data []byte) error {
	return s.FromString(string(data))
}

type Language string

func (l Language) String() string {
	if l == "" {
		return "none"
	}
	return string(l)
}

func (l *Language) FromString(str string) error {
	if str == "none" {
		*l = ""
	} else {
		*l = Language(str)
	}
	return nil
}

func (l Language) MarshalText() (data []byte, err error) {
	data = []byte(l.String())
	return
}

func (l *Language) UnmarshalText(data []byte) error {
	return l.FromString(string(data))
}

type FullState struct {
	State    State
	Ratio    float32
	Language Language
}

// Web Interface

type WebError struct {
	ResponseCode int    `json:"response-code"`
	Error        string `json:"error"`
}

type WebLanguage struct {
	Lang Language `json:"language"`
}

type WebState struct {
	State State    `json:"state"`
	Ratio float32  `json:"original-to-interpreter-ratio"`
	Lang  Language `json:"language"`
}

type WebSocketRequest struct {
	Command string   `json:"command"`
	Args    []string `json:"arguments"`
}

type WebSocketResponseBase struct {
	ResponseCode int    `json:"response-code"`
	Type         string `json:"type"`
}

type WebSocketResponseError struct {
	WebSocketResponseBase
	ErrorString string `json:"error"`
}

type WebSocketResponseState struct {
	WebSocketResponseBase
	WebState
}

type WebSocketResponseLanguages struct {
	WebSocketResponseBase
	Languages []Language `json:"languages"`
}

type WebSocketResponseFull struct {
	WebSocketResponseBase
	ErrorString string `json:"error"`
	WebState
	Languages []Language `json:"languages"`
}