// Copyright © 2019-2022 Ettore Di Giacinto <mudler@luet.io>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, see <http://www.gnu.org/licenses/>.

package tree

import (
	"io/ioutil"
	"path/filepath"

	"github.com/mudler/luet/pkg/api/core/template"
	"github.com/mudler/luet/pkg/api/core/types"
	fileHelper "github.com/mudler/luet/pkg/helpers/file"
	"github.com/pkg/errors"

	"github.com/ghodss/yaml"
)

func RuntimeDefinitionParser(srcDir, currentpath, name string, templates []string, db types.PackageDatabase) error {
	if name != types.PackageDefinitionFile {
		return nil
	}
	dat, err := ioutil.ReadFile(currentpath)
	if err != nil {
		return errors.Wrap(err, "Error reading file "+currentpath)
	}

	pack, err := types.PackageFromYaml(dat)
	if err != nil {
		return errors.Wrap(err, "Error reading yaml "+currentpath)
	}

	// Path is set only internally when tree is loaded from disk
	pack.SetPath(filepath.Dir(currentpath))
	_, err = db.CreatePackage(&pack)
	if err != nil {
		return errors.Wrap(err, "Error creating package "+pack.GetName())
	}

	// slurp subpackages here
	compileDefPath := pack.Rel(CompilerDefinitionFile)
	if fileHelper.Exists(compileDefPath) {
		dat, err := template.RenderWithValues(append(templates, compileDefPath), currentpath)
		if err != nil {
			return errors.Wrap(err,
				"Error templating file "+CompilerDefinitionFile+" from "+
					filepath.Dir(currentpath))
		}

		spec := &types.LuetCompilationSpec{}

		if err := yaml.Unmarshal([]byte(dat), spec); err != nil {
			return err
		}
		for i, _ := range spec.SubPackages {
			d := spec.SubPackages[i]
			d.SetPath(filepath.Dir(currentpath))

			_, err = db.CreatePackage(d.Package)
			if err != nil {
				return errors.Wrap(err, "Error creating package "+pack.GetName())
			}
		}
	}

	return nil
}

func BuildDefinitionParser(srcDir, currentpath, name string, templates []string, db types.PackageDatabase) error {
	if name != types.PackageDefinitionFile {
		return nil
	}
	pack, err := ReadDefinitionFile(currentpath)
	if err != nil {
		return err
	}
	// Path is set only internally when tree is loaded from disk
	pack.SetPath(filepath.Dir(currentpath))
	pack.SetTreeDir(srcDir)

	// Instead of rdeps, have a different tree for build deps.
	compileDefPath := pack.Rel(CompilerDefinitionFile)
	if fileHelper.Exists(compileDefPath) {
		dat, err := template.RenderWithValues(append(templates, compileDefPath), currentpath)
		if err != nil {
			return errors.Wrap(err,
				"Error templating file "+CompilerDefinitionFile+" from "+
					filepath.Dir(currentpath))
		}

		packbuild, err := types.PackageFromYaml([]byte(dat))
		if err != nil {
			return errors.Wrap(err,
				"Error reading yaml "+CompilerDefinitionFile+" from "+
					filepath.Dir(currentpath))
		}
		pack.Requires(packbuild.GetRequires())
		pack.Conflicts(packbuild.GetConflicts())
	}

	_, err = db.CreatePackage(&pack)
	if err != nil {
		return errors.Wrap(err, "Error creating package "+pack.GetName())
	}
	return nil
}