package main

import (
	"fmt"
	"net/http"
	"os"

	"github.com/ledgerwatch/log/v3"
	"github.com/urfave/cli/v2"

	"github.com/ledgerwatch/erigon-lib/common/datadir"
	"github.com/ledgerwatch/erigon-lib/common/dbg"
	"github.com/ledgerwatch/erigon-lib/metrics"
	"github.com/ledgerwatch/erigon/diagnostics"
	"github.com/ledgerwatch/erigon/params"
	erigonapp "github.com/ledgerwatch/erigon/turbo/app"
	erigoncli "github.com/ledgerwatch/erigon/turbo/cli"
	"github.com/ledgerwatch/erigon/turbo/debug"
	"github.com/ledgerwatch/erigon/turbo/node"
)

func main() {
	defer func() {
		panicResult := recover()
		if panicResult == nil {
			return
		}

		log.Error("catch panic", "err", panicResult, "stack", dbg.Stack())
		os.Exit(1)
	}()

	app := erigonapp.MakeApp("erigon", runErigon, erigoncli.DefaultFlags)
	if err := app.Run(os.Args); err != nil {
		_, printErr := fmt.Fprintln(os.Stderr, err)
		if printErr != nil {
			log.Warn("Fprintln error", "err", printErr)
		}
		os.Exit(1)
	}
}

func runErigon(cliCtx *cli.Context) error {
	var logger log.Logger
	var err error
	var metricsMux *http.ServeMux

	if logger, metricsMux, err = debug.Setup(cliCtx, true /* root logger */); err != nil {
		return err
	}

	// initializing the node and providing the current git commit there

	logger.Info("Build info", "git_branch", params.GitBranch, "git_tag", params.GitTag, "git_commit", params.GitCommit)
	erigonInfoGauge := metrics.GetOrCreateGauge(fmt.Sprintf(`erigon_info{version="%s",commit="%s"}`, params.Version, params.GitCommit))
	erigonInfoGauge.Set(1)

	nodeCfg := node.NewNodConfigUrfave(cliCtx, logger)
	if err := datadir.ApplyMigrations(nodeCfg.Dirs); err != nil {
		return err
	}

	ethCfg := node.NewEthConfigUrfave(cliCtx, nodeCfg, logger)

	ethNode, err := node.New(cliCtx.Context, nodeCfg, ethCfg, logger)
	if err != nil {
		log.Error("Erigon startup", "err", err)
		return err
	}

	if metricsMux != nil {
		diagnostics.Setup(cliCtx, metricsMux, ethNode)
	}

	err = ethNode.Serve()
	if err != nil {
		log.Error("error while serving an Erigon node", "err", err)
	}
	return err
}