//go:build mysql

package mysql

import (
	"os"
	"strings"
	"testing"

	"github.com/tinode/chat/server/store/types"
)

func TestGroupAdminAccessModeDoesNotGrantOwner(t *testing.T) {
	mode := groupAdminAccessMode()
	if !mode.IsAdmin() {
		t.Fatalf("admin mode should grant admin access: %s", mode.String())
	}
	if mode.IsOwner() {
		t.Fatalf("admin mode must not grant owner access: %s", mode.String())
	}
}

func TestMessageSearchDoesNotClearScannedHead(t *testing.T) {
	source, err := os.ReadFile("tenant_adapter.go")
	if err != nil {
		t.Fatal(err)
	}
	if strings.Contains(string(source), "msg.Head = kvMapFromJSON(msg.Head)") {
		t.Fatal("message search must not clear Head after sqlx StructScan has already decoded it")
	}
}

func TestRuntimeOpenDoesNotAutoCreateOrMigrateTables(t *testing.T) {
	source, err := os.ReadFile("adapter.go")
	if err != nil {
		t.Fatal(err)
	}
	body := string(source)
	for _, tc := range []struct {
		name     string
		function string
		end      string
	}{
		{
			name:     "Open",
			function: "func (a *adapter) Open",
			end:      "\nfunc (a *adapter) Close",
		},
		{
			name:     "TenantAdapterFor",
			function: "func (a *adapter) TenantAdapterFor",
			end:      "\nfunc (a *adapter) tenantByID",
		},
	} {
		fn := sourceBetween(t, body, tc.function, tc.end)
		for _, forbidden := range []string{
			"ensureIMRegistrationInviteControlTables",
			"ensureIMTenantEntryControlTables",
			"ensureIMGroupBusinessTables",
			"ensureIMHTTPInfrastructureTables",
			"ensureIMAdminGovernanceTables",
			"ensureIMFileReviewTables",
			"ensureIMOrganizationVisibilityTables",
			"ensureSnowflakePrimaryKeys",
			"ensureUserIdentitySchema",
			"ensureIMRegistrationInviteUseTable",
			"CREATE DATABASE",
			"CREATE TABLE",
			"ALTER TABLE",
		} {
			if strings.Contains(fn, forbidden) {
				t.Fatalf("%s must not auto-create or auto-migrate schema; found %q", tc.name, forbidden)
			}
		}
	}
}

func sourceBetween(t *testing.T, source, startMarker, endMarker string) string {
	t.Helper()
	start := strings.Index(source, startMarker)
	if start < 0 {
		t.Fatalf("missing source marker %q", startMarker)
	}
	end := strings.Index(source[start:], endMarker)
	if end < 0 {
		t.Fatalf("missing source marker %q after %q", endMarker, startMarker)
	}
	return source[start : start+end]
}

func TestSearchPaginationCursorUsesLastReturnedRow(t *testing.T) {
	source, err := os.ReadFile("tenant_adapter.go")
	if err != nil {
		t.Fatal(err)
	}
	body := string(source)
	for _, tc := range []struct {
		name      string
		function  string
		forbidden string
		required  string
	}{
		{
			name:      "p2p message search",
			function:  "func (a *adapter) TenantMessageSearch",
			forbidden: "nextCursor = strconv.FormatInt(msg.SeqId, 10)",
			required:  "nextCursor = strconv.FormatInt(lastSeq, 10)",
		},
		{
			name:      "group message search",
			function:  "func (a *adapter) tenantGroupMessageSearch",
			forbidden: "nextCursor = strconv.FormatInt(msg.SeqId, 10)",
			required:  "nextCursor = strconv.FormatInt(lastSeq, 10)",
		},
		{
			name:      "favorite list",
			function:  "func (a *adapter) TenantFavoriteList",
			forbidden: "nextCursor = strconv.FormatInt(item.ID, 10)",
			required:  "nextCursor = strconv.FormatInt(lastID, 10)",
		},
	} {
		fn := functionSource(t, body, tc.function)
		if strings.Contains(fn, tc.forbidden) {
			t.Fatalf("%s must not use the extra fetched row as next cursor", tc.name)
		}
		if !strings.Contains(fn, tc.required) {
			t.Fatalf("%s must use the last returned row as next cursor", tc.name)
		}
	}
}

func TestMessageSearchTextMatchesStructuredContent(t *testing.T) {
	msg := types.Message{
		Content: types.KVMap{
			"file": map[string]any{
				"file_name": "项目方案.pdf",
			},
			"link": map[string]any{
				"title":   "季度复盘",
				"summary": "增长分析",
			},
		},
	}
	for _, query := range []string{"项目方案", "季度", "增长 分析"} {
		if !messageMatchesSearch(msg, query) {
			t.Fatalf("structured message should match query %q, text=%q", query, messageSearchText(msg.Content))
		}
	}
	if messageMatchesSearch(msg, "不存在") {
		t.Fatal("structured message matched unrelated query")
	}
}

func TestTenantFileAccessIncludesAvatarAudienceRules(t *testing.T) {
	source, err := os.ReadFile("tenant_adapter.go")
	if err != nil {
		t.Fatal(err)
	}
	body := string(source)
	for _, want := range []string{
		"INNER JOIN %s AS fs",
		"fs.user_id=? AND fs.peer_id=fml.userid AND fs.status=?",
		"INNER JOIN im_group_members AS gm",
		"gm.topic=fml.topic AND gm.user_id=? AND gm.member_status=?",
	} {
		if !strings.Contains(body, want) {
			t.Fatalf("file ACL must include avatar audience rule %q", want)
		}
	}
}

func functionSource(t *testing.T, source, marker string) string {
	t.Helper()
	start := strings.Index(source, marker)
	if start < 0 {
		t.Fatalf("function %q not found", marker)
	}
	next := strings.Index(source[start+len(marker):], "\nfunc ")
	if next < 0 {
		return source[start:]
	}
	return source[start : start+len(marker)+next]
}