package main

import (
	"fmt"
	"sort"
	"strings"

	"github.com/fatih/color"
	"github.com/urfave/cli/v2"

	"github.com/filecoin-project/sector-storage/storiface"

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

var workersCmd = &cli.Command{
	Name:  "workers",
	Usage: "interact with workers",
	Subcommands: []*cli.Command{
		workersListCmd,
	},
}

var workersListCmd = &cli.Command{
	Name:  "list",
	Usage: "list workers",
	Flags: []cli.Flag{
		&cli.BoolFlag{Name: "color"},
	},
	Action: func(cctx *cli.Context) error {
		color.NoColor = !cctx.Bool("color")

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

		ctx := lcli.ReqContext(cctx)

		stats, err := nodeApi.WorkerStats(ctx)
		if err != nil {
			return err
		}

		type sortableStat struct {
			id uint64
			storiface.WorkerStats
		}

		st := make([]sortableStat, 0, len(stats))
		for id, stat := range stats {
			st = append(st, sortableStat{id, stat})
		}

		sort.Slice(st, func(i, j int) bool {
			return st[i].id < st[j].id
		})

		for _, stat := range st {
			gpuUse := "not "
			gpuCol := color.FgBlue
			if stat.GpuUsed {
				gpuCol = color.FgGreen
				gpuUse = ""
			}

			fmt.Printf("Worker %d, host %s\n", stat.id, color.MagentaString(stat.Info.Hostname))

			var barCols = uint64(64)
			cpuBars := int(stat.CpuUse * barCols / stat.Info.Resources.CPUs)
			cpuBar := strings.Repeat("|", cpuBars) + strings.Repeat(" ", int(barCols)-cpuBars)

			fmt.Printf("\tCPU:  [%s] %d core(s) in use\n", color.GreenString(cpuBar), stat.CpuUse)

			ramBarsRes := int(stat.Info.Resources.MemReserved * barCols / stat.Info.Resources.MemPhysical)
			ramBarsUsed := int(stat.MemUsedMin * barCols / stat.Info.Resources.MemPhysical)
			ramBar := color.YellowString(strings.Repeat("|", ramBarsRes)) +
				color.GreenString(strings.Repeat("|", ramBarsUsed)) +
				strings.Repeat(" ", int(barCols)-ramBarsUsed-ramBarsRes)

			vmem := stat.Info.Resources.MemPhysical + stat.Info.Resources.MemSwap

			vmemBarsRes := int(stat.Info.Resources.MemReserved * barCols / vmem)
			vmemBarsUsed := int(stat.MemUsedMax * barCols / vmem)
			vmemBar := color.YellowString(strings.Repeat("|", vmemBarsRes)) +
				color.GreenString(strings.Repeat("|", vmemBarsUsed)) +
				strings.Repeat(" ", int(barCols)-vmemBarsUsed-vmemBarsRes)

			fmt.Printf("\tRAM:  [%s] %d%% %s/%s\n", ramBar,
				(stat.Info.Resources.MemReserved+stat.MemUsedMin)*100/stat.Info.Resources.MemPhysical,
				types.SizeStr(types.NewInt(stat.Info.Resources.MemReserved+stat.MemUsedMin)),
				types.SizeStr(types.NewInt(stat.Info.Resources.MemPhysical)))

			fmt.Printf("\tVMEM: [%s] %d%% %s/%s\n", vmemBar,
				(stat.Info.Resources.MemReserved+stat.MemUsedMax)*100/vmem,
				types.SizeStr(types.NewInt(stat.Info.Resources.MemReserved+stat.MemUsedMax)),
				types.SizeStr(types.NewInt(vmem)))

			for _, gpu := range stat.Info.Resources.GPUs {
				fmt.Printf("\tGPU: %s\n", color.New(gpuCol).Sprintf("%s, %sused", gpu, gpuUse))
			}
		}

		return nil
	},
}