// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package labels

import (
	"testing"

	"github.com/stretchr/testify/require"
	"gotest.tools/v3/assert"
)

func TestPickPlatform(t *testing.T) {
	tests := []struct {
		name   string
		labels []string
		runsOn []string
		want   string
	}{
		{
			name:   "exact match host label",
			labels: []string{"linux-latest:host", "ubuntu:host"},
			runsOn: []string{"linux-latest"},
			want:   "-self-hosted",
		},
		{
			name:   "exact match docker label",
			labels: []string{"ubuntu:docker://node:18"},
			runsOn: []string{"ubuntu"},
			want:   "node:18",
		},
		{
			name:   "no match returns empty string to fail job",
			labels: []string{"linux:host", "debian:host"},
			runsOn: []string{"unknown-label"},
			want:   "",
		},
		{
			name:   "no match on docker runner returns empty string",
			labels: []string{"ubuntu:docker://node:18", "linux:host"},
			runsOn: []string{"unknown-label"},
			want:   "",
		},
		{
			name:   "empty labels returns empty string",
			labels: []string{},
			runsOn: []string{"anything"},
			want:   "",
		},
		{
			name:   "multiple runsOn matches first available",
			labels: []string{"linux:host", "ubuntu:docker://node:18"},
			runsOn: []string{"windows", "ubuntu"},
			want:   "node:18",
		},
		{
			name:   "runsOn with :host suffix matches host label",
			labels: []string{"germany-linux:host", "linux:host"},
			runsOn: []string{"germany-linux:host"},
			want:   "-self-hosted",
		},
		{
			name:   "runsOn with :docker suffix matches docker label",
			labels: []string{"ubuntu:docker://node:18"},
			runsOn: []string{"ubuntu:docker"},
			want:   "node:18",
		},
		{
			name:   "runsOn without suffix matches any schema",
			labels: []string{"linux:host"},
			runsOn: []string{"linux"},
			want:   "-self-hosted",
		},
		{
			name:   "runsOn :docker does not match host label",
			labels: []string{"linux:host"},
			runsOn: []string{"linux:docker"},
			want:   "",
		},
		{
			name:   "runsOn :host does not match docker label",
			labels: []string{"ubuntu:docker://node:18"},
			runsOn: []string{"ubuntu:host"},
			want:   "",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			ls := Labels{}
			for _, l := range tt.labels {
				label, err := Parse(l)
				require.NoError(t, err)
				ls = append(ls, label)
			}
			got := ls.PickPlatform(tt.runsOn)
			assert.Equal(t, got, tt.want)
		})
	}
}

func TestParse(t *testing.T) {
	tests := []struct {
		args    string
		want    *Label
		wantErr bool
	}{
		{
			args: "ubuntu:docker://node:18",
			want: &Label{
				Name:   "ubuntu",
				Schema: "docker",
				Arg:    "//node:18",
			},
			wantErr: false,
		},
		{
			args: "ubuntu:host",
			want: &Label{
				Name:   "ubuntu",
				Schema: "host",
				Arg:    "",
			},
			wantErr: false,
		},
		{
			args: "ubuntu",
			want: &Label{
				Name:   "ubuntu",
				Schema: "host",
				Arg:    "",
			},
			wantErr: false,
		},
		{
			args:    "ubuntu:vm:ubuntu-18.04",
			want:    nil,
			wantErr: true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.args, func(t *testing.T) {
			got, err := Parse(tt.args)
			if tt.wantErr {
				require.Error(t, err)
				return
			}
			require.NoError(t, err)
			assert.DeepEqual(t, got, tt.want)
		})
	}
}