package main

import (
	"bytes"
	"context"
	"fmt"
	"sort"
	"time"

	"github.com/fatih/color"
	"github.com/urfave/cli/v2"
	"golang.org/x/xerrors"

	"github.com/filecoin-project/specs-actors/actors/builtin/miner"
	"github.com/filecoin-project/specs-actors/actors/builtin/power"
	sealing "github.com/filecoin-project/storage-fsm"

	"github.com/filecoin-project/lotus/api"
	"github.com/filecoin-project/lotus/build"
	"github.com/filecoin-project/lotus/chain/types"
	lcli "github.com/filecoin-project/lotus/cli"
)

var infoCmd = &cli.Command{
	Name:  "info",
	Usage: "Print miner info",
	Action: func(cctx *cli.Context) error {
		color.NoColor = !cctx.Bool("color")

		nodeApi, closer, err := lcli.GetStorageMinerAPI(cctx)
		if err != nil {
			return err
		}
		defer closer()

		api, acloser, err := lcli.GetFullNodeAPI(cctx)
		if err != nil {
			return err
		}
		defer acloser()

		ctx := lcli.ReqContext(cctx)

		maddr, err := getActorAddress(ctx, nodeApi, cctx.String("actor"))
		if err != nil {
			return err
		}

		mact, err := api.StateGetActor(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}
		var mas miner.State
		{
			rmas, err := api.ChainReadObj(ctx, mact.Head)
			if err != nil {
				return err
			}
			if err := mas.UnmarshalCBOR(bytes.NewReader(rmas)); err != nil {
				return err
			}
		}

		fmt.Printf("Miner: %s\n", color.BlueString("%s", maddr))

		// Sector size
		mi, err := api.StateMinerInfo(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}

		fmt.Printf("Sector Size: %s\n", types.SizeStr(types.NewInt(uint64(mi.SectorSize))))

		pow, err := api.StateMinerPower(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}

		rpercI := types.BigDiv(types.BigMul(pow.MinerPower.RawBytePower, types.NewInt(1000000)), pow.TotalPower.RawBytePower)
		qpercI := types.BigDiv(types.BigMul(pow.MinerPower.QualityAdjPower, types.NewInt(1000000)), pow.TotalPower.QualityAdjPower)

		fmt.Printf("Byte Power:   %s / %s (%0.4f%%)\n",
			color.BlueString(types.SizeStr(pow.MinerPower.RawBytePower)),
			types.SizeStr(pow.TotalPower.RawBytePower),
			float64(rpercI.Int64())/10000)

		fmt.Printf("Actual Power: %s / %s (%0.4f%%)\n",
			color.GreenString(types.DeciStr(pow.MinerPower.QualityAdjPower)),
			types.DeciStr(pow.TotalPower.QualityAdjPower),
			float64(qpercI.Int64())/10000)

		secCounts, err := api.StateMinerSectorCount(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}
		faults, err := api.StateMinerFaults(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return err
		}

		nfaults, err := faults.Count()
		if err != nil {
			return xerrors.Errorf("counting faults: %w", err)
		}

		fmt.Printf("\tCommitted: %s\n", types.SizeStr(types.BigMul(types.NewInt(secCounts.Sectors), types.NewInt(uint64(mi.SectorSize)))))
		if nfaults == 0 {
			fmt.Printf("\tProving: %s\n", types.SizeStr(types.BigMul(types.NewInt(secCounts.Active), types.NewInt(uint64(mi.SectorSize)))))
		} else {
			var faultyPercentage float64
			if secCounts.Sectors != 0 {
				faultyPercentage = float64(10000*nfaults/secCounts.Sectors) / 100.
			}
			fmt.Printf("\tProving: %s (%s Faulty, %.2f%%)\n",
				types.SizeStr(types.BigMul(types.NewInt(secCounts.Sectors), types.NewInt(uint64(mi.SectorSize)))),
				types.SizeStr(types.BigMul(types.NewInt(nfaults), types.NewInt(uint64(mi.SectorSize)))),
				faultyPercentage)
		}

		if pow.MinerPower.RawBytePower.LessThan(power.ConsensusMinerMinPower) {
			fmt.Print("Below minimum power threshold, no blocks will be won")
		} else {
			expWinChance := float64(types.BigMul(qpercI, types.NewInt(build.BlocksPerEpoch)).Int64()) / 1000000
			if expWinChance > 0 {
				if expWinChance > 1 {
					expWinChance = 1
				}
				winRate := time.Duration(float64(time.Second*time.Duration(build.BlockDelaySecs)) / expWinChance)
				winPerDay := float64(time.Hour*24) / float64(winRate)

				fmt.Print("Expected block win rate: ")
				color.Blue("%.4f/day (every %s)", winPerDay, winRate.Truncate(time.Second))
			}
		}

		fmt.Println()

		fmt.Printf("Miner Balance: %s\n", color.YellowString("%s", types.FIL(mact.Balance)))
		fmt.Printf("\tPreCommit:   %s\n", types.FIL(mas.PreCommitDeposits))
		fmt.Printf("\tLocked:      %s\n", types.FIL(mas.LockedFunds))
		color.Green("\tAvailable:   %s", types.FIL(types.BigSub(mact.Balance, types.BigAdd(mas.LockedFunds, mas.PreCommitDeposits))))
		wb, err := api.WalletBalance(ctx, mi.Worker)
		if err != nil {
			return xerrors.Errorf("getting worker balance: %w", err)
		}
		color.Cyan("Worker Balance: %s", types.FIL(wb))

		mb, err := api.StateMarketBalance(ctx, maddr, types.EmptyTSK)
		if err != nil {
			return xerrors.Errorf("getting market balance: %w", err)
		}
		fmt.Printf("Market (Escrow):  %s\n", types.FIL(mb.Escrow))
		fmt.Printf("Market (Locked):  %s\n", types.FIL(mb.Locked))

		fmt.Println()

		fmt.Println("Sectors:")
		err = sectorsInfo(ctx, nodeApi)
		if err != nil {
			return err
		}

		// TODO: grab actr state / info
		//  * Sealed sectors (count / bytes)
		//  * Power
		return nil
	},
}

type stateMeta struct {
	i     int
	col   color.Attribute
	state sealing.SectorState
}

var stateOrder = map[sealing.SectorState]stateMeta{}
var stateList = []stateMeta{
	{col: 39, state: "Total"},
	{col: color.FgGreen, state: sealing.Proving},

	{col: color.FgRed, state: sealing.UndefinedSectorState},
	{col: color.FgYellow, state: sealing.Empty},
	{col: color.FgYellow, state: sealing.Packing},
	{col: color.FgYellow, state: sealing.PreCommit1},
	{col: color.FgYellow, state: sealing.PreCommit2},
	{col: color.FgYellow, state: sealing.PreCommitting},
	{col: color.FgYellow, state: sealing.PreCommitWait},
	{col: color.FgYellow, state: sealing.WaitSeed},
	{col: color.FgYellow, state: sealing.Committing},
	{col: color.FgYellow, state: sealing.CommitWait},
	{col: color.FgYellow, state: sealing.FinalizeSector},

	{col: color.FgRed, state: sealing.FailedUnrecoverable},
	{col: color.FgRed, state: sealing.SealPreCommit1Failed},
	{col: color.FgRed, state: sealing.SealPreCommit2Failed},
	{col: color.FgRed, state: sealing.PreCommitFailed},
	{col: color.FgRed, state: sealing.ComputeProofFailed},
	{col: color.FgRed, state: sealing.CommitFailed},
	{col: color.FgRed, state: sealing.PackingFailed},
	{col: color.FgRed, state: sealing.FinalizeFailed},
	{col: color.FgRed, state: sealing.Faulty},
	{col: color.FgRed, state: sealing.FaultReported},
	{col: color.FgRed, state: sealing.FaultedFinal},
}

func init() {
	for i, state := range stateList {
		stateOrder[state.state] = stateMeta{
			i:   i,
			col: state.col,
		}
	}
}

func sectorsInfo(ctx context.Context, napi api.StorageMiner) error {
	sectors, err := napi.SectorsList(ctx)
	if err != nil {
		return err
	}

	buckets := map[sealing.SectorState]int{
		"Total": len(sectors),
	}
	for _, s := range sectors {
		st, err := napi.SectorsStatus(ctx, s, false)
		if err != nil {
			return err
		}

		buckets[sealing.SectorState(st.State)]++
	}

	var sorted []stateMeta
	for state, i := range buckets {
		sorted = append(sorted, stateMeta{i: i, state: state})
	}

	sort.Slice(sorted, func(i, j int) bool {
		return stateOrder[sorted[i].state].i < stateOrder[sorted[j].state].i
	})

	for _, s := range sorted {
		_, _ = color.New(stateOrder[s.state].col).Printf("\t%s: %d\n", s.state, s.i)
	}

	return nil
}