package python

import (
	"encoding/json"
	"io/ioutil"
	"path/filepath"
	"testing"

	"github.com/pulumi/pulumi/pkg/v2/codegen/schema"
	"github.com/stretchr/testify/assert"
)

var pathTests = []struct {
	input    string
	expected string
}{
	{".", "."},
	{"", "."},
	{"../", ".."},
	{"../..", "..."},
	{"../../..", "...."},
	{"something", ".something"},
	{"../parent", "..parent"},
	{"../../module", "...module"},
}

func TestRelPathToRelImport(t *testing.T) {
	for _, tt := range pathTests {
		t.Run(tt.input, func(t *testing.T) {
			result := relPathToRelImport(tt.input)
			if result != tt.expected {
				t.Errorf("expected \"%s\"; got \"%s\"", tt.expected, result)
			}
		})
	}
}

func TestGeneratePackage(t *testing.T) {
	tests := []struct {
		name          string
		schemaDir     string
		expectedFiles []string
		wantErr       bool
		validator     func(files, expectedFiles map[string][]byte)
	}{
		{
			"Simple schema with local resource properties",
			"simple-resource-schema",
			[]string{
				filepath.Join("pulumi_example", "resource.py"),
				filepath.Join("pulumi_example", "other_resource.py"),
				filepath.Join("pulumi_example", "arg_function.py"),
			},
			false,
			func(files, expectedFiles map[string][]byte) {
				for name, file := range expectedFiles {
					assert.Contains(t, files, name)
					assert.Equal(t, file, files[name])
				}
			},
		},
	}

	testDir := filepath.Join("..", "internal", "test", "testdata")

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			// Read in, decode, and import the schema.
			schemaBytes, err := ioutil.ReadFile(filepath.Join(testDir, tt.schemaDir, "schema.json"))
			assert.NoError(t, err)

			expectedFiles := map[string][]byte{}
			for _, file := range tt.expectedFiles {
				fileBytes, err := ioutil.ReadFile(filepath.Join(testDir, tt.schemaDir, file))
				assert.NoError(t, err)

				expectedFiles[file] = fileBytes
			}

			var pkgSpec schema.PackageSpec
			err = json.Unmarshal(schemaBytes, &pkgSpec)
			assert.NoError(t, err)

			pkg, err := schema.ImportSpec(pkgSpec, nil)
			if (err != nil) != tt.wantErr {
				t.Errorf("ImportSpec() error = %v, wantErr %v", err, tt.wantErr)
				return
			}

			files, err := GeneratePackage("test", pkg, nil)
			if err != nil {
				panic(err)
			}
			tt.validator(files, expectedFiles)
		})
	}
}