//go:build darwin || freebsd || linux
// +build darwin freebsd linux

package fuse

import (
	"testing"
	"time"

	"github.com/restic/restic/internal/restic"
	"github.com/restic/restic/internal/test"
)

func TestPathsFromSn(t *testing.T) {
	id1, _ := restic.ParseID("1234567812345678123456781234567812345678123456781234567812345678")
	time1, _ := time.Parse("2006-01-02T15:04:05", "2021-01-01T00:00:01")
	sn1 := &restic.Snapshot{Hostname: "host", Username: "user", Tags: []string{"tag1", "tag2"}, Time: time1}
	sn1.SetID(id1)

	var p []string
	var s string

	p, s = pathsFromSn("ids/%i", "2006-01-02T15:04:05", sn1)
	test.Equals(t, []string{"ids/12345678"}, p)
	test.Equals(t, "", s)

	p, s = pathsFromSn("snapshots/%T", "2006-01-02T15:04:05", sn1)
	test.Equals(t, []string{"snapshots/"}, p)
	test.Equals(t, "2021-01-01T00:00:01", s)

	p, s = pathsFromSn("hosts/%h/%T", "2006-01-02T15:04:05", sn1)
	test.Equals(t, []string{"hosts/host/"}, p)
	test.Equals(t, "2021-01-01T00:00:01", s)

	p, s = pathsFromSn("tags/%t/%T", "2006-01-02T15:04:05", sn1)
	test.Equals(t, []string{"tags/tag1/", "tags/tag2/"}, p)
	test.Equals(t, "2021-01-01T00:00:01", s)

	p, s = pathsFromSn("users/%u/%T", "2006-01-02T15:04:05", sn1)
	test.Equals(t, []string{"users/user/"}, p)
	test.Equals(t, "2021-01-01T00:00:01", s)

	p, s = pathsFromSn("longids/%I", "2006-01-02T15:04:05", sn1)
	test.Equals(t, []string{"longids/1234567812345678123456781234567812345678123456781234567812345678"}, p)
	test.Equals(t, "", s)

	p, s = pathsFromSn("%T/%h", "2006/01/02", sn1)
	test.Equals(t, []string{"2021/01/01/host"}, p)
	test.Equals(t, "", s)

	p, s = pathsFromSn("%T/%i", "2006/01", sn1)
	test.Equals(t, []string{"2021/01/12345678"}, p)
	test.Equals(t, "", s)
}

func TestMakeDirs(t *testing.T) {
	pathTemplates := []string{"ids/%i", "snapshots/%T", "hosts/%h/%T",
		"tags/%t/%T", "users/%u/%T", "longids/%I", "%T/%h", "%T/%i",
	}
	timeTemplate := "2006/01/02"

	sds := &SnapshotsDirStructure{
		pathTemplates: pathTemplates,
		timeTemplate:  timeTemplate,
	}

	id0, _ := restic.ParseID("0000000012345678123456781234567812345678123456781234567812345678")
	time0, _ := time.Parse("2006-01-02T15:04:05", "2020-12-31T00:00:01")
	sn0 := &restic.Snapshot{Hostname: "host", Username: "user", Tags: []string{"tag1", "tag2"}, Time: time0}
	sn0.SetID(id0)

	id1, _ := restic.ParseID("1234567812345678123456781234567812345678123456781234567812345678")
	time1, _ := time.Parse("2006-01-02T15:04:05", "2021-01-01T00:00:01")
	sn1 := &restic.Snapshot{Hostname: "host", Username: "user", Tags: []string{"tag1", "tag2"}, Time: time1}
	sn1.SetID(id1)

	id2, _ := restic.ParseID("8765432112345678123456781234567812345678123456781234567812345678")
	time2, _ := time.Parse("2006-01-02T15:04:05", "2021-01-01T01:02:03")
	sn2 := &restic.Snapshot{Hostname: "host2", Username: "user2", Tags: []string{"tag2", "tag3", "tag4"}, Time: time2}
	sn2.SetID(id2)

	id3, _ := restic.ParseID("aaaaaaaa12345678123456781234567812345678123456781234567812345678")
	time3, _ := time.Parse("2006-01-02T15:04:05", "2021-01-01T01:02:03")
	sn3 := &restic.Snapshot{Hostname: "host", Username: "user2", Tags: []string{}, Time: time3}
	sn3.SetID(id3)

	sds.makeDirs(restic.Snapshots{sn0, sn1, sn2, sn3})

	expNames := make(map[string]*restic.Snapshot)
	expLatest := make(map[string]string)

	// empty entries for dir structure
	expNames["ids/"] = nil
	expNames["snapshots/"] = nil
	expNames["hosts/"] = nil
	expNames["tags/"] = nil
	expNames["users/"] = nil
	expNames["longids/"] = nil
	expNames["//"] = nil

	// entries for sn0
	expNames["ids/00000000"] = sn0
	expNames["snapshots/2020/12/31"] = sn0
	expNames["hosts/host/2020/12/31"] = sn0
	expNames["tags/tag1/2020/12/31"] = sn0
	expNames["tags/tag2/2020/12/31"] = sn0
	expNames["users/user/2020/12/31"] = sn0
	expNames["longids/0000000012345678123456781234567812345678123456781234567812345678"] = sn0
	expNames["2020/12/31/host"] = sn0
	expNames["2020/12/31/00000000"] = sn0

	// entries for sn1
	expNames["ids/12345678"] = sn1
	expNames["snapshots/2021/01/01"] = sn1
	expNames["hosts/host/2021/01/01"] = sn1
	expNames["tags/tag1/2021/01/01"] = sn1
	expNames["tags/tag2/2021/01/01"] = sn1
	expNames["users/user/2021/01/01"] = sn1
	expNames["longids/1234567812345678123456781234567812345678123456781234567812345678"] = sn1
	expNames["2021/01/01/host"] = sn1
	expNames["2021/01/01/12345678"] = sn1

	// entries for sn2
	expNames["ids/87654321"] = sn2
	expNames["snapshots/2021/01/01-1"] = sn2 // sn1 and sn2 have same time string
	expNames["hosts/host2/2021/01/01"] = sn2
	expNames["tags/tag2/2021/01/01-1"] = sn2 // sn1 and sn2 have same time string
	expNames["tags/tag3/2021/01/01"] = sn2
	expNames["tags/tag4/2021/01/01"] = sn2
	expNames["users/user2/2021/01/01"] = sn2
	expNames["longids/8765432112345678123456781234567812345678123456781234567812345678"] = sn2
	expNames["2021/01/01/host2"] = sn2
	expNames["2021/01/01/87654321"] = sn2

	// entries for sn3
	expNames["ids/aaaaaaaa"] = sn3
	expNames["snapshots/2021/01/01-2"] = sn3   // sn1 - sn3 have same time string
	expNames["hosts/host/2021/01/01-1"] = sn3  // sn1 and sn3 have same time string
	expNames["users/user2/2021/01/01-1"] = sn3 // sn2 and sn3 have same time string
	expNames["longids/aaaaaaaa12345678123456781234567812345678123456781234567812345678"] = sn3
	expNames["2021/01/01/host-1"] = sn3 // sn1 and sn3 have same time string and identical host
	expNames["2021/01/01/aaaaaaaa"] = sn3

	// latest links
	expLatest["snapshots/"] = "2021/01/01-2" // sn1 - sn3 have same time string
	expLatest["hosts/host/"] = "2021/01/01-1"
	expLatest["hosts/host2/"] = "2021/01/01"
	expLatest["tags/tag1/"] = "2021/01/01"
	expLatest["tags/tag2/"] = "2021/01/01-1" // sn1 and sn2 have same time string
	expLatest["tags/tag3/"] = "2021/01/01"
	expLatest["tags/tag4/"] = "2021/01/01"
	expLatest["users/user/"] = "2021/01/01"
	expLatest["users/user2/"] = "2021/01/01-1" // sn2 and sn3 have same time string

	test.Equals(t, expNames, sds.names)
	test.Equals(t, expLatest, sds.latest)
}