package recipe

import (
	"fmt"
	"os"
	"path/filepath"
	"strconv"

	"coopcloud.tech/abra/cli/formatter"
	"coopcloud.tech/abra/cli/internal"
	"coopcloud.tech/abra/pkg/client/stack"
	loader "coopcloud.tech/abra/pkg/client/stack"
	"coopcloud.tech/abra/pkg/config"
	"coopcloud.tech/tagcmp"
	"github.com/docker/distribution/reference"
	"github.com/sirupsen/logrus"
	"github.com/urfave/cli/v2"
)

var recipeLintCommand = &cli.Command{
	Name:      "lint",
	Usage:     "Lint a recipe",
	Aliases:   []string{"l"},
	ArgsUsage: "<recipe>",
	Action: func(c *cli.Context) error {
		recipe := internal.ValidateRecipeArg(c)

		pattern := fmt.Sprintf("%s/%s/compose**yml", config.APPS_DIR, recipe)
		composeFiles, err := filepath.Glob(pattern)
		if err != nil {
			logrus.Fatal(err)
		}
		opts := stack.Deploy{Composefiles: composeFiles}
		compose, err := loader.LoadComposefile(opts, make(map[string]string))
		if err != nil {
			logrus.Fatal(err)
		}

		expectedVersion := false
		if compose.Version == "3.8" {
			expectedVersion = true
		}

		envSampleProvided := false
		envSample := fmt.Sprintf("%s/%s/.env.sample", config.APPS_DIR, recipe)
		if _, err := os.Stat(envSample); !os.IsNotExist(err) {
			envSampleProvided = true
		}
		if err != nil {
			logrus.Fatal(err)
		}

		serviceNamedApp := false
		traefikEnabled := false
		healthChecksForAllServices := true
		allImagesTagged := true
		noUnstableTags := true
		semverLikeTags := true
		for _, service := range compose.Services {
			if service.Name == "app" {
				serviceNamedApp = true
			}

			for label := range service.Deploy.Labels {
				if label == "traefik.enable" {
					if service.Deploy.Labels[label] == "true" {
						traefikEnabled = true
					}
				}
			}

			img, err := reference.ParseNormalizedNamed(service.Image)
			if err != nil {
				logrus.Fatal(err)
			}
			if reference.IsNameOnly(img) {
				allImagesTagged = false
			}

			tag := img.(reference.NamedTagged).Tag()
			if tag == "latest" {
				noUnstableTags = false
			}

			if !tagcmp.IsParsable(tag) {
				semverLikeTags = false
			}

			if service.HealthCheck == nil {
				healthChecksForAllServices = false
			}
		}

		tableCol := []string{"Rule", "Satisfied"}
		table := formatter.CreateTable(tableCol)
		table.Append([]string{"Compose files have the expected version", strconv.FormatBool(expectedVersion)})
		table.Append([]string{"Environment configuration is provided", strconv.FormatBool(envSampleProvided)})
		table.Append([]string{"Recipe contains a service named 'app'", strconv.FormatBool(serviceNamedApp)})
		table.Append([]string{"Traefik routing enabled on at least one service", strconv.FormatBool(traefikEnabled)})
		table.Append([]string{"All services have a healthcheck enabled", strconv.FormatBool(healthChecksForAllServices)})
		table.Append([]string{"All images are using a tag", strconv.FormatBool(allImagesTagged)})
		table.Append([]string{"No usage of unstable 'latest' tags", strconv.FormatBool(noUnstableTags)})
		table.Append([]string{"All tags are using a semver-like format", strconv.FormatBool(semverLikeTags)})
		table.Render()

		return nil
	},
}