package types

import (
	"encoding/json"
	"time"

	"github.com/tendermint/go-crypto"
	"github.com/tendermint/go-wire/data"
	cmn "github.com/tendermint/tmlibs/common"
)

//------------------------------------------------------------
// we store the gendoc in the db

var GenDocKey = []byte("GenDocKey")

//------------------------------------------------------------
// core types for a genesis definition

type GenesisValidator struct {
	PubKey crypto.PubKey `json:"pub_key"`
	Amount int64         `json:"amount"`
	Name   string        `json:"name"`
}

type GenesisDoc struct {
	GenesisTime time.Time          `json:"genesis_time"`
	ChainID     string             `json:"chain_id"`
	Validators  []GenesisValidator `json:"validators"`
	AppHash     data.Bytes         `json:"app_hash"`
}

// Utility method for saving GenensisDoc as JSON file.
func (genDoc *GenesisDoc) SaveAs(file string) error {
	genDocBytes, err := json.Marshal(genDoc)
	if err != nil {
		return err
	}
	return cmn.WriteFile(file, genDocBytes, 0644)
}

//------------------------------------------------------------
// Make genesis state from file

func GenesisDocFromJSON(jsonBlob []byte) (*GenesisDoc, error) {
	genDoc := GenesisDoc{}
	err := json.Unmarshal(jsonBlob, &genDoc)
	return &genDoc, err
}