// Recipe is a builder imeplementation.

// It reads a Tree and spit it in human readable form (YAML), called recipe,
// It also loads a tree (recipe) from a YAML (to a db, e.g. BoltDB), allowing to query it
// with the solver, using the package object.
package tree_test

import (
	"io/ioutil"
	"os"

	pkg "github.com/mudler/luet/pkg/package"
	"github.com/mudler/luet/pkg/solver"
	gentoo "github.com/mudler/luet/pkg/tree/builder/gentoo"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"

	. "github.com/mudler/luet/pkg/tree"
)

type FakeParser struct {
}

var _ = Describe("Recipe", func() {

	Context("Tree generation and storing", func() {
		It("parses and writes a tree", func() {
			tmpdir, err := ioutil.TempDir("", "tree")
			Expect(err).ToNot(HaveOccurred())
			defer os.RemoveAll(tmpdir) // clean up

			gb := gentoo.NewGentooBuilder(&gentoo.SimpleEbuildParser{})
			tree, err := gb.Generate("../../tests/fixtures/overlay")
			Expect(err).ToNot(HaveOccurred())
			defer func() {
				Expect(tree.GetPackageSet().Clean()).ToNot(HaveOccurred())
			}()

			Expect(len(tree.GetPackageSet().GetPackages())).To(Equal(11))

			generalRecipe := NewGeneralRecipe()
			generalRecipe.WithTree(tree)
			err = generalRecipe.Save(tmpdir)
			Expect(err).ToNot(HaveOccurred())
		})
	})

	Context("Reloading trees", func() {
		It("writes and reads back the same tree", func() {
			tmpdir, err := ioutil.TempDir("", "tree")
			Expect(err).ToNot(HaveOccurred())
			defer os.RemoveAll(tmpdir) // clean up

			gb := gentoo.NewGentooBuilder(&gentoo.SimpleEbuildParser{})
			tree, err := gb.Generate("../../tests/fixtures/overlay")
			Expect(err).ToNot(HaveOccurred())
			defer func() {
				Expect(tree.GetPackageSet().Clean()).ToNot(HaveOccurred())
			}()

			Expect(len(tree.GetPackageSet().GetPackages())).To(Equal(11))

			generalRecipe := NewGeneralRecipe()
			generalRecipe.WithTree(tree)
			err = generalRecipe.Save(tmpdir)
			Expect(err).ToNot(HaveOccurred())

			generalRecipe.WithTree(nil)
			Expect(generalRecipe.Tree()).To(BeNil())

			err = generalRecipe.Load(tmpdir)
			Expect(err).ToNot(HaveOccurred())
			Expect(generalRecipe.Tree()).ToNot(BeNil()) // It should be populated back at this point

			Expect(len(generalRecipe.Tree().GetPackageSet().GetPackages())).To(Equal(11))

			for _, pid := range tree.GetPackageSet().GetPackages() {
				p, err := tree.GetPackageSet().GetPackage(pid)
				Expect(err).ToNot(HaveOccurred())
				Expect(p.GetName()).To(ContainSubstring("pinentry"))
			}
		})
	})

	Context("Simple solving with the fixture tree", func() {
		It("writes and reads back the same tree", func() {
			tmpdir, err := ioutil.TempDir("", "tree")
			Expect(err).ToNot(HaveOccurred())
			defer os.RemoveAll(tmpdir) // clean up

			gb := gentoo.NewGentooBuilder(&gentoo.SimpleEbuildParser{})
			tree, err := gb.Generate("../../tests/fixtures/overlay")
			Expect(err).ToNot(HaveOccurred())
			defer func() {
				Expect(tree.GetPackageSet().Clean()).ToNot(HaveOccurred())
			}()

			Expect(len(tree.GetPackageSet().GetPackages())).To(Equal(11))

			pack, err := tree.FindPackage(&pkg.DefaultPackage{Name: "pinentry", Version: "1.0.0-r2", Category: "app-crypt"}) // Note: the definition depends on pinentry-base without an explicit version
			Expect(err).ToNot(HaveOccurred())
			world, err := tree.World()
			Expect(err).ToNot(HaveOccurred())

			s := solver.NewSolver([]pkg.Package{}, world)
			solution, err := s.Install([]pkg.Package{pack})
			Expect(err).ToNot(HaveOccurred())
			Expect(len(solution)).To(Equal(3))

			var allSol string
			for _, sol := range solution {
				allSol = allSol + "\n" + sol.ToString()
			}
			Expect(allSol).To(ContainSubstring("app-crypt/pinentry-base  installed: true"))
			Expect(allSol).To(ContainSubstring("app-crypt/pinentry 1.1.0-r2 installed: false"))
			Expect(allSol).To(ContainSubstring("app-crypt/pinentry 1.0.0-r2 installed: true"))
		})
	})
})