package test

import (
	"os"
	"os/exec"
	"path/filepath"
	"testing"

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

	"github.com/pulumi/pulumi/pkg/v3/codegen"
	"github.com/pulumi/pulumi/sdk/v3/go/common/util/contract"
)

type ThenFunc func(t *testing.T, testDir string)

type sdkTest struct {
	Directory        string
	Description      string
	SkipCompileCheck codegen.StringSet
	Then             map[string]ThenFunc
}

const (
	nodejs = "nodejs"
	dotnet = "dotnet"
	golang = "go"
)

var sdkTests = []sdkTest{
	{
		Directory:   "input-collision",
		Description: "Schema with types that could potentially produce collisions (go).",
	},
	{
		Directory:   "dash-named-schema",
		Description: "Simple schema with a two part name (foo-bar)",
	},
	{
		Directory:        "external-resource-schema",
		Description:      "External resource schema",
		SkipCompileCheck: codegen.NewStringSet(nodejs, golang),
	},
	{
		Directory:        "nested-module",
		Description:      "Nested module",
		SkipCompileCheck: codegen.NewStringSet(dotnet, nodejs),
	},
	{
		Directory:        "nested-module-thirdparty",
		Description:      "Third-party nested module",
		SkipCompileCheck: codegen.NewStringSet(dotnet, nodejs),
	},
	{
		Directory:   "plain-schema-gh6957",
		Description: "Repro for #6957",
	},
	{
		Directory:   "resource-args-python",
		Description: "Resource args with same named resource and type",
		Then: map[string]ThenFunc{
			"go": func(t *testing.T, testDir string) {
				cmd := exec.Command("go", "test", "./...")
				cmd.Dir = filepath.Join(testDir, "go-program")

				out, err := cmd.CombinedOutput()
				if !assert.NoError(t, err) {
					t.Logf("output: %v", string(out))
				}
			},
		},
	},
	{
		Directory:   "simple-enum-schema",
		Description: "Simple schema with enum types",
	},
	{
		Directory:   "simple-plain-schema",
		Description: "Simple schema with plain properties",
	},
	{
		Directory:   "simple-plain-schema-with-root-package",
		Description: "Simple schema with root package set",
	},
	{
		Directory:   "simple-resource-schema",
		Description: "Simple schema with local resource properties",
	},
	{
		Directory:   "simple-resource-schema-custom-pypackage-name",
		Description: "Simple schema with local resource properties and custom Python package name",
	},
	{
		Directory:        "simple-methods-schema",
		Description:      "Simple schema with methods",
		SkipCompileCheck: codegen.NewStringSet(nodejs, dotnet, golang),
	},
	{
		Directory:   "simple-yaml-schema",
		Description: "Simple schema encoded using YAML",
	},
	{
		Directory:        "provider-config-schema",
		Description:      "Simple provider config schema",
		SkipCompileCheck: codegen.NewStringSet(dotnet),
	},
	{
		Directory:        "replace-on-change",
		Description:      "Simple use of replaceOnChange in schema",
		SkipCompileCheck: codegen.NewStringSet(golang),
	},
	{
		Directory:        "resource-property-overlap",
		Description:      "A resource with the same name as it's property",
		SkipCompileCheck: codegen.NewStringSet(dotnet, nodejs),
	},
	{
		Directory:   "hyphen-url",
		Description: "A resource url with a hyphen in it's path",
	},
}

type checkPackageSignature = func(t *testing.T, pwd string)

// TestSDKCodegen runs the complete set of SDK code generation tests against a particular language's code
// generator. It also verifies that the generated code is structurally sound.
//
// An SDK code generation test consists of a schema and a set of expected outputs for each language. Each test is
// structured as a directory that contains that information:
//
//     test-directory/
//         schema.(json|yaml)
//         language-0
//         ...
//         language-n
//
// The schema is the only piece that must be manually authored. Once the schema has been written, the expected outputs
// can be generated by running `PULUMI_ACCEPT=true go test ./..." from the `pkg/codegen` directory.
//nolint: revive
func TestSDKCodegen(t *testing.T, language string, genPackage GenPkgSignature, checkPackage checkPackageSignature) {
	testDir := filepath.Join("..", "internal", "test", "testdata")

	for _, tt := range sdkTests {
		t.Run(tt.Description, func(t *testing.T) {
			dirPath := filepath.Join(testDir, filepath.FromSlash(tt.Directory))

			schemaPath := filepath.Join(dirPath, "schema.json")
			if _, err := os.Stat(schemaPath); err != nil && os.IsNotExist(err) {
				schemaPath = filepath.Join(dirPath, "schema.yaml")
			}

			files, err := GeneratePackageFilesFromSchema(schemaPath, genPackage)
			require.NoError(t, err)

			// Check output is valid code (will type-check). If code will not
			// type-check, we don't allow the user to run PULUMI_ACCEPT=true and
			// replace the test files.
			if !tt.SkipCompileCheck.Has(language) {
				typeCheckPath := filepath.Join(dirPath, "typecheck")
				langTypeCheckPath := filepath.Join(typeCheckPath, language)
				contract.IgnoreError(os.RemoveAll(langTypeCheckPath))
				WriteTestFiles(t, typeCheckPath, language, files)
				checkPackage(t, langTypeCheckPath)
			}

			if !RewriteFilesWhenPulumiAccept(t, dirPath, language, files) {
				expectedFiles, err := LoadBaseline(dirPath, language)
				require.NoError(t, err)

				if !ValidateFileEquality(t, files, expectedFiles) {
					return
				}
			}

			if then, ok := tt.Then[language]; ok {
				then(t, dirPath)
			}
		})
	}
}