package arcast

import (
	"embed"
	"encoding/json"
	"io/fs"
	"path/filepath"

	"forge.cadoles.com/arcad/arcast/pkg/server"
	"github.com/pkg/errors"
)

var (
	DefaultApps []server.App
	//go:embed apps/**
	appsFS embed.FS
)

func init() {
	defaultApps, err := loadApps("apps/*")
	if err != nil {
		panic(errors.WithStack(err))
	}

	DefaultApps = defaultApps
}

func loadApps(dirPattern string) ([]server.App, error) {
	apps := make([]server.App, 0)

	files, err := fs.Glob(appsFS, dirPattern)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	for _, f := range files {
		stat, err := fs.Stat(appsFS, f)
		if err != nil {
			return nil, errors.WithStack(err)
		}

		if !stat.IsDir() {
			continue
		}

		rawManifest, err := fs.ReadFile(appsFS, filepath.Join(f, "manifest.json"))
		if err != nil {
			return nil, errors.WithStack(err)
		}

		var app server.App

		if err := json.Unmarshal(rawManifest, &app); err != nil {
			return nil, errors.WithStack(err)
		}

		app.ID = filepath.Base(f)

		fs, err := fs.Sub(appsFS, "apps/"+app.ID)
		if err != nil {
			return nil, errors.WithStack(err)
		}

		app.FS = fs

		apps = append(apps, app)
	}

	return apps, nil
}