package test

import (
	"RenewCMS/internal/domain/builtintype"
	"RenewCMS/internal/domain/contenttype"
	"RenewCMS/internal/domain/invite"
	"RenewCMS/internal/domain/role"
	"RenewCMS/internal/domain/user"
	"errors"
	"go/ast"
	"go/token"
	"path/filepath"
	"reflect"
	"strconv"
	"strings"
	"testing"
)

func TestUsersAPIDomain(t *testing.T) {
	t.Run("user.User has no role string and invite.Invite carries RoleID", func(t *testing.T) {
		if _, present := reflect.TypeOf(user.User{}).FieldByName("Role"); present {
			t.Errorf("user.User.Role must not exist")
		}
		if field, present := reflect.TypeOf(invite.Invite{}).FieldByName("RoleID"); !present || field.Type.Kind() != reflect.Uint32 {
			t.Errorf("invite.Invite.RoleID is missing")
		}
	})

	t.Run("the legacy role vocabulary is gone from the source tree", func(t *testing.T) {
		for _, path := range nonTestGoFiles(t, "../internal", "../api", "../cmd") {
			ast.Inspect(parsedGoFile(t, path), func(node ast.Node) bool {
				switch found := node.(type) {
				case *ast.SelectorExpr:
					if owner, ok := found.X.(*ast.Ident); ok && (owner.Name == "user" || owner.Name == "domainUser") && (found.Sel.Name == "Role" || found.Sel.Name == "RoleOwner" || found.Sel.Name == "RoleAdmin") {
						t.Errorf("%s reads %s.%s", path, owner.Name, found.Sel.Name)
					}
				case *ast.Ident:
					if found.Name == "legacyBuiltInNames" || found.Name == "legacyRoleNames" || found.Name == "BackfillUserRoleIDs" {
						t.Errorf("%s names %s", path, found.Name)
					}
				}
				return true
			})
		}
	})

	t.Run("the new sentinels map with errors.Is", func(t *testing.T) {
		wrapped := errors.Join(errors.New("context"), user.ErrRoleChanged, user.ErrInvalidTransfer, user.ErrConfirmationMismatch, role.ErrUnknownRole)
		for _, sentinel := range []error{user.ErrRoleChanged, user.ErrInvalidTransfer, user.ErrConfirmationMismatch, role.ErrUnknownRole} {
			if !errors.Is(wrapped, sentinel) {
				t.Errorf("%v is not matched", sentinel)
			}
		}
	})

	t.Run("user and invite import the standard library and domain packages only", func(t *testing.T) {
		for _, pattern := range []string{"../internal/domain/user/*.go", "../internal/domain/invite/*.go"} {
			files, _ := filepath.Glob(pattern)
			if len(files) == 0 {
				t.Fatalf("no files for %s", pattern)
			}
			for _, file := range files {
				for _, imported := range importsOf(t, strings.TrimPrefix(filepath.ToSlash(file), "../")) {
					if !isStandardLibrary(imported) && !strings.HasPrefix(imported, "RenewCMS/internal/domain/") {
						t.Errorf("%s imports %s", file, imported)
					}
				}
			}
		}
	})

	t.Run("GrantSet.Covers rows used by the slice", func(t *testing.T) {
		manager := unlockedGrantSet("content.read=all", "content.create=all", "content.update=own", "content.publish=own", "schema.view=all")
		cases := []struct {
			name   string
			grants []string
			key    string
		}{
			{"Writer", []string{"content.read=all", "content.create=all", "content.update=all"}, "content.update"},
			{"Content lead", []string{"content.read=all", "content.update=all", "content.publish=all"}, "content.update"},
			{"Intern", []string{"content.read=own"}, ""},
			{"Contributor", []string{"content.read=all", "content.create=all", "content.update=own"}, ""},
		}
		for _, row := range cases {
			err := manager.Covers(unlockedGrantSet(row.grants...), nil)
			if row.key == "" && err != nil {
				t.Errorf("%s: unexpected %v", row.name, err)
			}
			var escalation role.EscalationError
			if row.key != "" && (!errors.As(err, &escalation) || escalation.Key != row.key) {
				t.Errorf("%s: expected an escalation on %s, got %v", row.name, row.key, err)
			}
		}
	})

	t.Run("the builtin user type keeps an optional plain text role field", func(t *testing.T) {
		found, err := builtintype.Find(builtintype.KeyUser)
		if err != nil {
			t.Fatal(err)
		}
		for _, field := range found.Fields {
			if field.Key != "role" {
				continue
			}
			if field.Type != contenttype.TypeText || field.Required || len(field.Options) != 0 {
				t.Errorf("unexpected role field %+v", field)
			}
			return
		}
		t.Errorf("the user type has no role field")
	})

	t.Run("api/router.go uses the key constants for the new routes", func(t *testing.T) {
		wanted := map[string]bool{"KeyUsersChangeRole": false, "KeySystemTransferOwnership": false}
		ast.Inspect(parsedGoFile(t, "../api/router.go"), func(node ast.Node) bool {
			if selector, ok := node.(*ast.SelectorExpr); ok {
				if _, tracked := wanted[selector.Sel.Name]; tracked {
					wanted[selector.Sel.Name] = true
				}
			}
			if literal, ok := node.(*ast.BasicLit); ok && literal.Kind == token.STRING {
				if value, err := strconv.Unquote(literal.Value); err == nil && (value == "users.change_role" || value == "system.transfer_ownership") {
					t.Errorf("router holds the literal %q", value)
				}
			}
			return true
		})
		for name, seen := range wanted {
			if !seen {
				t.Errorf("router does not use role.%s", name)
			}
		}
	})

	t.Run("handlers of the slice import no persistence, mailer, models or gorm", func(t *testing.T) {
		for _, pattern := range []string{"../api/handlers/user/*.go", "../api/handlers/ownership/*.go"} {
			files, _ := filepath.Glob(pattern)
			if len(files) == 0 {
				t.Fatalf("no files for %s", pattern)
			}
			for _, file := range files {
				for _, imported := range importsOf(t, strings.TrimPrefix(filepath.ToSlash(file), "../")) {
					for _, forbidden := range []string{"persistence", "mailer", "models", "gorm"} {
						if strings.Contains(imported, forbidden) {
							t.Errorf("%s imports %s", file, imported)
						}
					}
				}
			}
		}
	})
}