package app

import (
	"context"
	"encoding/json"
	"fmt"
	"time"

	"coopcloud.tech/abra/cli/internal"
	appPkg "coopcloud.tech/abra/pkg/app"
	"coopcloud.tech/abra/pkg/autocomplete"
	"coopcloud.tech/abra/pkg/client"
	"coopcloud.tech/abra/pkg/formatter"
	"coopcloud.tech/abra/pkg/log"
	"coopcloud.tech/abra/pkg/recipe"
	abraService "coopcloud.tech/abra/pkg/service"
	stack "coopcloud.tech/abra/pkg/upstream/stack"
	"github.com/buger/goterm"
	dockerFormatter "github.com/docker/cli/cli/command/formatter"
	containerTypes "github.com/docker/docker/api/types/container"
	"github.com/docker/docker/api/types/filters"
	dockerClient "github.com/docker/docker/client"
	"github.com/urfave/cli"
)

var appPsCommand = cli.Command{
	Name:        "ps",
	Aliases:     []string{"p"},
	Usage:       "Check app status",
	ArgsUsage:   "<domain>",
	Description: "Show status of a deployed app.",
	Flags: []cli.Flag{
		internal.MachineReadableFlag,
		internal.WatchFlag,
		internal.DebugFlag,
	},
	Before:       internal.SubCommandBefore,
	BashComplete: autocomplete.AppNameComplete,
	Action: func(c *cli.Context) error {
		app := internal.ValidateApp(c)

		cl, err := client.New(app.Server)
		if err != nil {
			log.Fatal(err)
		}

		isDeployed, deployedVersion, err := stack.IsDeployed(context.Background(), cl, app.StackName())
		if err != nil {
			log.Fatal(err)
		}

		if !isDeployed {
			log.Fatalf("%s is not deployed?", app.Name)
		}

		statuses, err := appPkg.GetAppStatuses([]appPkg.App{app}, true)
		if statusMeta, ok := statuses[app.StackName()]; ok {
			if _, exists := statusMeta["chaos"]; !exists {
				if err := recipe.EnsureVersion(app.Recipe, deployedVersion); err != nil {
					log.Fatal(err)
				}
			}
		}

		if !internal.Watch {
			showPSOutput(app, cl)
			return nil
		}

		goterm.Clear()
		for {
			goterm.MoveCursor(1, 1)
			showPSOutput(app, cl)
			goterm.Flush()
			time.Sleep(2 * time.Second)
		}
	},
}

// showPSOutput renders ps output.
func showPSOutput(app appPkg.App, cl *dockerClient.Client) {
	composeFiles, err := recipe.GetComposeFiles(app.Recipe, app.Env)
	if err != nil {
		log.Fatal(err)
		return
	}

	deployOpts := stack.Deploy{
		Composefiles: composeFiles,
		Namespace:    app.StackName(),
		Prune:        false,
		ResolveImage: stack.ResolveImageAlways,
	}
	compose, err := appPkg.GetAppComposeConfig(app.Name, deployOpts, app.Env)
	if err != nil {
		log.Fatal(err)
		return
	}

	var tablerows [][]string
	allContainerStats := make(map[string]map[string]string)
	for _, service := range compose.Services {
		filters := filters.NewArgs()
		filters.Add("name", fmt.Sprintf("^%s_%s", app.StackName(), service.Name))

		containers, err := cl.ContainerList(context.Background(), containerTypes.ListOptions{Filters: filters})
		if err != nil {
			log.Fatal(err)
			return
		}

		var containerStats map[string]string
		if len(containers) == 0 {
			containerStats = map[string]string{
				"service": service.Name,
				"image":   "unknown",
				"created": "unknown",
				"status":  "unknown",
				"state":   "unknown",
				"ports":   "unknown",
			}
		} else {
			container := containers[0]
			containerStats = map[string]string{
				"service": abraService.ContainerToServiceName(container.Names, app.StackName()),
				"image":   formatter.RemoveSha(container.Image),
				"created": formatter.HumanDuration(container.Created),
				"status":  container.Status,
				"state":   container.State,
				"ports":   dockerFormatter.DisplayablePorts(container.Ports),
			}
		}

		allContainerStats[containerStats["service"]] = containerStats

		tablerow := []string{
			containerStats["service"],
			containerStats["image"],
			containerStats["created"],
			containerStats["status"],
			containerStats["state"],
			containerStats["ports"],
		}

		tablerows = append(tablerows, tablerow)
	}

	if internal.MachineReadable {
		jsonstring, err := json.Marshal(allContainerStats)
		if err != nil {
			log.Fatal(err)
		}

		fmt.Println(string(jsonstring))

		return
	}

	tableCol := []string{"service", "image", "created", "status", "state", "ports"}
	table := formatter.CreateTable(tableCol)
	for _, row := range tablerows {
		table.Append(row)
	}
	table.Render()
}