// Copyright © 2023 Vulcanize, Inc
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"os"
	"os/signal"
	"sync"

	statediff "github.com/cerc-io/plugeth-statediff"
	"github.com/ethereum/go-ethereum/common"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"

	pkg "github.com/vulcanize/eth-statediff-service/pkg"
)

// serveCmd represents the serve command
var runCmd = &cobra.Command{
	Use:   "run",
	Short: "Produce diffs for a specific block range",
	Long: `Usage

./eth-statediff-service run --config={path to toml config file}`,
	Run: func(cmd *cobra.Command, args []string) {
		subCommand = cmd.CalledAs()
		logWithCommand = *logrus.WithField("SubCommand", subCommand)
		runRanges()
	},
}

func runRanges() {
	service := createStateDiffService()

	// start service and servers
	var wg sync.WaitGroup
	if err := service.Loop(&wg); err != nil {
		logWithCommand.Fatalf("unable to start statediff service: %v", err)
	}
	ranges := getConfiguredRanges()
	service.Run(ranges)

	// clean shutdown
	shutdown := make(chan os.Signal)
	signal.Notify(shutdown, os.Interrupt)
	<-shutdown
	logWithCommand.Info("Received interrupt signal, shutting down")
	service.Stop()
	wg.Wait()
}

func getConfiguredRanges() []pkg.RangeRequest {
	params := statediff.Params{
		IncludeBlock:    viper.GetBool("run.params.includeBlock"),
		IncludeReceipts: viper.GetBool("run.params.includeReceipts"),
		IncludeTD:       viper.GetBool("run.params.includeTD"),
		IncludeCode:     viper.GetBool("run.params.includeCode"),
	}
	var addrStrs []string
	viper.UnmarshalKey("run.params.watchedAddresses", &addrStrs)
	addrs := make([]common.Address, len(addrStrs))
	for i, addrStr := range addrStrs {
		addrs[i] = common.HexToAddress(addrStr)
	}
	params.WatchedAddresses = addrs
	var rawRanges []blockRange
	viper.UnmarshalKey("run.ranges", &rawRanges)
	blockRanges := make([]pkg.RangeRequest, len(rawRanges))
	for i, rawRange := range rawRanges {
		blockRanges[i] = pkg.RangeRequest{
			Start:  rawRange[0],
			Stop:   rawRange[1],
			Params: params,
		}
	}
	return blockRanges
}