package deploy

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestGetImageNameAndTag(t *testing.T) {
	tests := []struct {
		name         string
		imageName    string
		expectedName string
		expectedTag  string
		expectError  bool
		description  string
	}{
		{
			name:         "standard image with tag",
			imageName:    "nginx:1.23",
			expectedName: "nginx",
			expectedTag:  "1.23",
			expectError:  false,
			description:  "should parse standard image name with tag",
		},
		{
			name:         "image with digest",
			imageName:    "nginx:1.23@sha256:abc123",
			expectedName: "nginx",
			expectedTag:  "1.23",
			expectError:  false,
			description:  "should parse image with digest, ignoring digest part",
		},
		{
			name:         "image with latest tag",
			imageName:    "redis:latest",
			expectedName: "redis",
			expectedTag:  "latest",
			expectError:  false,
			description:  "should parse image with latest tag",
		},
		{
			name:         "image with numeric tag",
			imageName:    "postgres:14",
			expectedName: "postgres",
			expectedTag:  "14",
			expectError:  false,
			description:  "should parse image with numeric tag",
		},
		{
			name:         "image with complex name",
			imageName:    "registry.example.com/myapp/api:v1.2.3",
			expectedName: "registry.example.com/myapp/api",
			expectedTag:  "v1.2.3",
			expectError:  false,
			description:  "should parse image with registry prefix and complex name",
		},
		{
			name:        "image without tag",
			imageName:   "nginx",
			expectError: true,
			description: "should error when no tag present",
		},
		{
			name:        "empty image name",
			imageName:   "",
			expectError: true,
			description: "should error on empty image name",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			name, tag, err := GetImageNameAndTag(tt.imageName)

			if tt.expectError {
				assert.Error(t, err)
				assert.Empty(t, name)
				assert.Empty(t, tag)
			} else {
				assert.NoError(t, err)
				assert.Equal(t, tt.expectedName, name)
				assert.Equal(t, tt.expectedTag, tag)
			}
		})
	}
}