package filesystem

import (
	"gopkg.in/src-d/go-git.v4/plumbing"
	"gopkg.in/src-d/go-git.v4/storage/filesystem/dotgit"

	. "gopkg.in/check.v1"
	"gopkg.in/src-d/go-git-fixtures.v3"
)

type FsSuite struct {
	fixtures.Suite
	Types []plumbing.ObjectType
}

var _ = Suite(&FsSuite{
	Types: []plumbing.ObjectType{
		plumbing.CommitObject,
		plumbing.TagObject,
		plumbing.TreeObject,
		plumbing.BlobObject,
	},
})

func (s *FsSuite) TestGetFromObjectFile(c *C) {
	fs := fixtures.ByTag(".git").ByTag("unpacked").One().DotGit()
	o, err := NewObjectStorage(dotgit.New(fs))
	c.Assert(err, IsNil)

	expected := plumbing.NewHash("f3dfe29d268303fc6e1bbce268605fc99573406e")
	obj, err := o.EncodedObject(plumbing.AnyObject, expected)
	c.Assert(err, IsNil)
	c.Assert(obj.Hash(), Equals, expected)
}

func (s *FsSuite) TestGetFromPackfile(c *C) {
	fixtures.Basic().ByTag(".git").Test(c, func(f *fixtures.Fixture) {
		fs := f.DotGit()
		o, err := NewObjectStorage(dotgit.New(fs))
		c.Assert(err, IsNil)

		expected := plumbing.NewHash("6ecf0ef2c2dffb796033e5a02219af86ec6584e5")
		obj, err := o.EncodedObject(plumbing.AnyObject, expected)
		c.Assert(err, IsNil)
		c.Assert(obj.Hash(), Equals, expected)
	})
}

func (s *FsSuite) TestGetFromPackfileMultiplePackfiles(c *C) {
	fs := fixtures.ByTag(".git").ByTag("multi-packfile").One().DotGit()
	o, err := NewObjectStorage(dotgit.New(fs))
	c.Assert(err, IsNil)

	expected := plumbing.NewHash("8d45a34641d73851e01d3754320b33bb5be3c4d3")
	obj, err := o.getFromPackfile(expected, false)
	c.Assert(err, IsNil)
	c.Assert(obj.Hash(), Equals, expected)

	expected = plumbing.NewHash("e9cfa4c9ca160546efd7e8582ec77952a27b17db")
	obj, err = o.getFromPackfile(expected, false)
	c.Assert(err, IsNil)
	c.Assert(obj.Hash(), Equals, expected)
}

func (s *FsSuite) TestIter(c *C) {
	fixtures.ByTag(".git").ByTag("packfile").Test(c, func(f *fixtures.Fixture) {
		fs := f.DotGit()
		o, err := NewObjectStorage(dotgit.New(fs))
		c.Assert(err, IsNil)

		iter, err := o.IterEncodedObjects(plumbing.AnyObject)
		c.Assert(err, IsNil)

		var count int32
		err = iter.ForEach(func(o plumbing.EncodedObject) error {
			count++
			return nil
		})

		c.Assert(err, IsNil)
		c.Assert(count, Equals, f.ObjectsCount)
	})
}

func (s *FsSuite) TestIterWithType(c *C) {
	fixtures.ByTag(".git").Test(c, func(f *fixtures.Fixture) {
		for _, t := range s.Types {
			fs := f.DotGit()
			o, err := NewObjectStorage(dotgit.New(fs))
			c.Assert(err, IsNil)

			iter, err := o.IterEncodedObjects(t)
			c.Assert(err, IsNil)

			err = iter.ForEach(func(o plumbing.EncodedObject) error {
				c.Assert(o.Type(), Equals, t)
				return nil
			})

			c.Assert(err, IsNil)
		}

	})
}

func (s *FsSuite) TestPackfileIter(c *C) {
	fixtures.ByTag(".git").Test(c, func(f *fixtures.Fixture) {
		fs := f.DotGit()
		dg := dotgit.New(fs)

		for _, t := range s.Types {
			ph, err := dg.ObjectPacks()
			c.Assert(err, IsNil)

			for _, h := range ph {
				f, err := dg.ObjectPack(h)
				c.Assert(err, IsNil)
				iter, err := NewPackfileIter(f, t)
				c.Assert(err, IsNil)
				err = iter.ForEach(func(o plumbing.EncodedObject) error {
					c.Assert(o.Type(), Equals, t)
					return nil
				})

				c.Assert(err, IsNil)
			}
		}
	})

}