/*
   Copyright 2020 Docker Compose CLI authors

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package compose

import (
	"context"
	"errors"
	"fmt"
	"os"

	"github.com/docker/compose-cli/api/client"
	"github.com/docker/compose-cli/api/compose"
	"github.com/docker/compose-cli/context/store"
	"github.com/docker/compose-cli/formatter"
	"github.com/docker/compose-cli/progress"

	"github.com/compose-spec/compose-go/cli"
	"github.com/compose-spec/compose-go/types"
	"github.com/spf13/cobra"
)

type upOptions struct {
	composeOptions
	removeOrphans bool
}

func upCommand(contextType string) *cobra.Command {
	opts := upOptions{}
	upCmd := &cobra.Command{
		Use:   "up [SERVICE...]",
		Short: "Create and start containers",
		RunE: func(cmd *cobra.Command, args []string) error {
			switch contextType {
			case store.LocalContextType, store.DefaultContextType, store.EcsLocalSimulationContextType:
				return runCreateStart(cmd.Context(), opts, args)
			default:
				return runUp(cmd.Context(), opts, args)
			}
		},
	}
	upCmd.Flags().StringVarP(&opts.ProjectName, "project-name", "p", "", "Project name")
	upCmd.Flags().StringVar(&opts.WorkingDir, "workdir", "", "Work dir")
	upCmd.Flags().StringArrayVarP(&opts.ConfigPaths, "file", "f", []string{}, "Compose configuration files")
	upCmd.Flags().StringArrayVarP(&opts.Environment, "environment", "e", []string{}, "Environment variables")
	upCmd.Flags().BoolVarP(&opts.Detach, "detach", "d", false, "Detached mode: Run containers in the background")
	upCmd.Flags().BoolVar(&opts.Build, "build", false, "Build images before starting containers.")
	upCmd.Flags().BoolVar(&opts.removeOrphans, "remove-orphans", false, "Remove containers for services not defined in the Compose file.")

	if contextType == store.AciContextType {
		upCmd.Flags().StringVar(&opts.DomainName, "domainname", "", "Container NIS domain name")
	}

	return upCmd
}

func runUp(ctx context.Context, opts upOptions, services []string) error {
	c, project, err := setup(ctx, opts.composeOptions, services)
	if err != nil {
		return err
	}

	_, err = progress.Run(ctx, func(ctx context.Context) (string, error) {
		return "", c.ComposeService().Up(ctx, project, compose.UpOptions{
			Detach: opts.Detach,
		})
	})
	return err
}

func runCreateStart(ctx context.Context, opts upOptions, services []string) error {
	c, project, err := setup(ctx, opts.composeOptions, services)
	if err != nil {
		return err
	}

	_, err = progress.Run(ctx, func(ctx context.Context) (string, error) {
		return "", c.ComposeService().Create(ctx, project, compose.CreateOptions{
			RemoveOrphans: opts.removeOrphans,
		})
	})
	if err != nil {
		return err
	}

	var consumer compose.LogConsumer
	if !opts.Detach {
		consumer = formatter.NewLogConsumer(ctx, os.Stdout)
	}

	err = c.ComposeService().Start(ctx, project, consumer)
	if errors.Is(ctx.Err(), context.Canceled) {
		fmt.Println("Gracefully stopping...")
		ctx = context.Background()
		_, err = progress.Run(ctx, func(ctx context.Context) (string, error) {
			return "", c.ComposeService().Down(ctx, project.Name, compose.DownOptions{})
		})
	}
	return err
}

func setup(ctx context.Context, opts composeOptions, services []string) (*client.Client, *types.Project, error) {
	c, err := client.NewWithDefaultLocalBackend(ctx)
	if err != nil {
		return nil, nil, err
	}

	options, err := opts.toProjectOptions()
	if err != nil {
		return nil, nil, err
	}
	project, err := cli.ProjectFromOptions(options)
	if err != nil {
		return nil, nil, err
	}
	if opts.DomainName != "" {
		// arbitrarily set the domain name on the first service ; ACI backend will expose the entire project
		project.Services[0].DomainName = opts.DomainName
	}
	if opts.Build {
		for _, service := range project.Services {
			service.PullPolicy = types.PullPolicyBuild
		}
	}

	err = filter(project, services)
	if err != nil {
		return nil, nil, err
	}
	return c, project, nil
}