package cmd

import (
	"context"
	"fmt"
	"os"
	"path/filepath"
	"strings"

	"gitea.com/gitea/act_runner/cmd/config"

	"github.com/joho/godotenv"
	"github.com/mattn/go-isatty"
	"github.com/nektos/act/pkg/artifacts"
	"github.com/nektos/act/pkg/model"
	"github.com/nektos/act/pkg/runner"
	"github.com/rs/zerolog"
	"github.com/rs/zerolog/log"
	"github.com/spf13/cobra"
)

const version = "0.1"

type Input struct {
	actor string
	// workdir string
	// workflowsPath         string
	// autodetectEvent       bool
	// eventPath       string
	reuseContainers bool
	bindWorkdir     bool
	// secrets         []string
	// envs []string
	// platforms       []string
	// dryrun       bool
	forcePull    bool
	forceRebuild bool
	// noOutput     bool
	// envfile         string
	// secretfile            string
	insecureSecrets bool
	// defaultBranch         string
	privileged            bool
	usernsMode            string
	containerArchitecture string
	containerDaemonSocket string
	// noWorkflowRecurse     bool
	useGitIgnore       bool
	forgeInstance      string
	containerCapAdd    []string
	containerCapDrop   []string
	autoRemove         bool
	artifactServerPath string
	artifactServerPort string
	jsonLogger         bool
	noSkipCheckout     bool
	// remoteName            string
}

func (i *Input) newPlatforms() map[string]string {
	return map[string]string{
		"ubuntu-latest": "node:16-buster-slim",
		"ubuntu-20.04":  "node:16-buster-slim",
		"ubuntu-18.04":  "node:16-buster-slim",
	}
}

// helper function cfgures the logging.
func initLogging(cfg config.Config) {
	isTerm := isatty.IsTerminal(os.Stdout.Fd())

	switch strings.ToLower(cfg.Logging.Level) {
	case "panic":
		zerolog.SetGlobalLevel(zerolog.PanicLevel)
	case "fatal":
		zerolog.SetGlobalLevel(zerolog.FatalLevel)
	case "error":
		zerolog.SetGlobalLevel(zerolog.ErrorLevel)
	case "warn":
		zerolog.SetGlobalLevel(zerolog.WarnLevel)
	case "info":
		zerolog.SetGlobalLevel(zerolog.InfoLevel)
	case "debug":
		zerolog.SetGlobalLevel(zerolog.DebugLevel)
	default:
		zerolog.SetGlobalLevel(zerolog.InfoLevel)
	}

	if cfg.Logging.Pretty || isTerm {
		log.Logger = log.Output(
			zerolog.ConsoleWriter{
				Out:     os.Stderr,
				NoColor: cfg.Logging.NoColor || !isTerm,
			},
		)
	}
}

func Execute(ctx context.Context) {
	var envfile string

	input := Input{
		reuseContainers: true,
		forgeInstance:   "gitea.com",
	}

	rootCmd := &cobra.Command{
		Use:          "act [event name to run]\nIf no event name passed, will default to \"on: push\"",
		Short:        "Run GitHub actions locally by specifying the event name (e.g. `push`) or an action name directly.",
		Args:         cobra.MaximumNArgs(1),
		RunE:         runCommand(ctx, &input),
		Version:      version,
		SilenceUsage: true,
	}
	rootCmd.AddCommand(&cobra.Command{
		Aliases: []string{"daemon"},
		Use:     "daemon [event name to run]\nIf no event name passed, will default to \"on: push\"",
		Short:   "Run GitHub actions locally by specifying the event name (e.g. `push`) or an action name directly.",
		Args:    cobra.MaximumNArgs(1),
		RunE:    runDaemon(ctx, &input),
	})
	rootCmd.Flags().BoolP("run", "r", false, "run workflows")
	rootCmd.Flags().StringP("job", "j", "", "run job")
	rootCmd.PersistentFlags().StringVarP(&input.forgeInstance, "forge-instance", "", "github.com", "Forge instance to use.")
	rootCmd.PersistentFlags().StringVarP(&envfile, "env-file", "", ".env", "Read in a file of environment variables.")

	_ = godotenv.Load(envfile)
	cfg, err := config.Environ()
	if err != nil {
		log.Fatal().
			Err(err).
			Msg("invalid cfguration")
	}

	initLogging(cfg)

	if err := rootCmd.Execute(); err != nil {
		os.Exit(1)
	}
}

// getWorkflowsPath return the workflows directory, it will try .gitea first and then fallback to .github
func getWorkflowsPath() (string, error) {
	dir, err := os.Getwd()
	if err != nil {
		return "", err
	}
	p := filepath.Join(dir, ".gitea/workflows")
	_, err = os.Stat(p)
	if err != nil {
		if !os.IsNotExist(err) {
			return "", err
		}
		return filepath.Join(dir, ".github/workflows"), nil
	}
	return p, nil
}

func runTask(ctx context.Context, input *Input, jobID string) error {
	workflowsPath, err := getWorkflowsPath()
	if err != nil {
		return err
	}
	planner, err := model.NewWorkflowPlanner(workflowsPath, false)
	if err != nil {
		return err
	}

	var eventName string
	events := planner.GetEvents()
	if len(events) > 0 {
		// set default event type to first event
		// this way user dont have to specify the event.
		log.Debug().Msgf("Using detected workflow event: %s", events[0])
		eventName = events[0]
	} else {
		if plan := planner.PlanEvent("push"); plan != nil {
			eventName = "push"
		}
	}

	// build the plan for this run
	var plan *model.Plan
	if jobID != "" {
		log.Debug().Msgf("Planning job: %s", jobID)
		plan = planner.PlanJob(jobID)
	} else {
		log.Debug().Msgf("Planning event: %s", eventName)
		plan = planner.PlanEvent(eventName)
	}

	curDir, err := os.Getwd()
	if err != nil {
		return err
	}

	// run the plan
	config := &runner.Config{
		Actor:           input.actor,
		EventName:       eventName,
		EventPath:       "",
		DefaultBranch:   "",
		ForcePull:       input.forcePull,
		ForceRebuild:    input.forceRebuild,
		ReuseContainers: input.reuseContainers,
		Workdir:         curDir,
		BindWorkdir:     input.bindWorkdir,
		LogOutput:       true,
		JSONLogger:      input.jsonLogger,
		// Env:                   envs,
		// Secrets:               secrets,
		InsecureSecrets:       input.insecureSecrets,
		Platforms:             input.newPlatforms(),
		Privileged:            input.privileged,
		UsernsMode:            input.usernsMode,
		ContainerArchitecture: input.containerArchitecture,
		ContainerDaemonSocket: input.containerDaemonSocket,
		UseGitIgnore:          input.useGitIgnore,
		GitHubInstance:        input.forgeInstance,
		ContainerCapAdd:       input.containerCapAdd,
		ContainerCapDrop:      input.containerCapDrop,
		AutoRemove:            input.autoRemove,
		ArtifactServerPath:    input.artifactServerPath,
		ArtifactServerPort:    input.artifactServerPort,
		NoSkipCheckout:        input.noSkipCheckout,
		// RemoteName:            input.remoteName,
	}
	r, err := runner.New(config)
	if err != nil {
		return fmt.Errorf("New config failed: %v", err)
	}

	cancel := artifacts.Serve(ctx, input.artifactServerPath, input.artifactServerPort)

	executor := r.NewPlanExecutor(plan).Finally(func(ctx context.Context) error {
		cancel()
		return nil
	})
	return executor(ctx)
}

func runCommand(ctx context.Context, input *Input) func(cmd *cobra.Command, args []string) error {
	return func(cmd *cobra.Command, args []string) error {
		jobID, err := cmd.Flags().GetString("job")
		if err != nil {
			return err
		}

		return runTask(ctx, input, jobID)
	}
}