package app

import (
	"strconv"
	"strings"

	abraFormatter "coopcloud.tech/abra/cli/formatter"
	"coopcloud.tech/abra/cli/internal"
	"coopcloud.tech/abra/pkg/autocomplete"
	"coopcloud.tech/abra/pkg/client"
	stack "coopcloud.tech/abra/pkg/upstream/stack"
	"github.com/docker/docker/api/types"
	"github.com/docker/docker/api/types/filters"
	"github.com/sirupsen/logrus"
	"github.com/urfave/cli/v2"
)

var appErrorsCommand = &cli.Command{
	Name:  "errors",
	Usage: "List errors for a deployed app",
	Description: `
This command will list errors for a deployed app. This is a best-effort
implementation and an attempt to gather a number of tips & tricks for finding
errors together into one convenient command. When an app is failing to deploy
or having issues, it could be a lot of things. This command is best accompanied
by "abra app logs <app>".
`,
	Aliases:      []string{"e"},
	Flags:        []cli.Flag{},
	BashComplete: autocomplete.AppNameComplete,
	Action: func(c *cli.Context) error {
		app := internal.ValidateApp(c)

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

		isDeployed, _, err := stack.IsDeployed(c.Context, cl, app.StackName())
		if err != nil {
			logrus.Fatal(err)
		}

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

		filters := filters.NewArgs()
		filters.Add("name", app.StackName())

		containers, err := cl.ContainerList(c.Context, types.ContainerListOptions{Filters: filters})
		if err != nil {
			logrus.Fatal(err)
		}

		tableCol := []string{"app name", "status", "error", "out of memory", "restart count", "healthcheck"}
		table := abraFormatter.CreateTable(tableCol)

		for _, container := range containers {
			serviceName := getServiceName(container.Names)

			containerState, err := cl.ContainerInspect(c.Context, container.ID)
			if err != nil {
				logrus.Fatal(err)
			}

			errMsg := "N/A"
			hcStat := "N/A"
			var hcLogs []string
			if containerState.State.Health != nil {
				hcStat = containerState.State.Health.Status
				for _, log := range containerState.State.Health.Log {
					hcLogs = append(hcLogs, log.Output)
				}
			}

			if containerState.State.Error != "" {
				errMsg = containerState.State.Error
			}

			table.Append([]string{
				serviceName,
				containerState.State.Status,
				errMsg,
				strconv.FormatBool(containerState.State.OOMKilled),
				strconv.Itoa(containerState.RestartCount),
				hcStat,
				strings.Join(hcLogs, "\n"),
			})
		}

		table.Render()

		return nil
	},
}

func getServiceName(names []string) string {
	containerName := strings.Join(names, " ")
	trimmed := strings.TrimPrefix(containerName, "/")
	return strings.Split(trimmed, ".")[0]
}