// Copyright 2026 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cloudsqlmysql

import (
	"context"
	"regexp"
	"strings"
	"testing"
	"time"

	"github.com/google/uuid"
	"github.com/googleapis/mcp-toolbox/internal/testutils"
	"github.com/googleapis/mcp-toolbox/tests"
)

func TestCloudSQLMySQLMCPListTools(t *testing.T) {
	sourceConfig := getCloudSQLMySQLVars(t)
	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
	defer cancel()

	pool, err := initCloudSQLMySQLConnectionPool(CloudSQLMySQLProject, CloudSQLMySQLRegion, CloudSQLMySQLInstance, "public", CloudSQLMySQLUser, CloudSQLMySQLPass, CloudSQLMySQLDatabase)
	if err != nil {
		t.Fatalf("unable to create Cloud SQL connection pool: %s", err)
	}

	// cleanup test environment
	tests.CleanupMySQLTables(t, ctx, pool)

	// create table name with UUID
	tableNameParam := "param_table_" + strings.ReplaceAll(uuid.New().String(), "-", "")
	tableNameAuth := "auth_table_" + strings.ReplaceAll(uuid.New().String(), "-", "")

	// set up data for param tool
	createParamTableStmt, insertParamTableStmt, paramToolStmt, idParamToolStmt, nameParamToolStmt, arrayToolStmt, paramTestParams := tests.GetMySQLParamToolInfo(tableNameParam)
	teardownTable1 := tests.SetupMySQLTable(t, ctx, pool, createParamTableStmt, insertParamTableStmt, tableNameParam, paramTestParams)
	defer teardownTable1(t)

	// set up data for auth tool
	createAuthTableStmt, insertAuthTableStmt, authToolStmt, authTestParams := tests.GetMySQLAuthToolInfo(tableNameAuth)
	teardownTable2 := tests.SetupMySQLTable(t, ctx, pool, createAuthTableStmt, insertAuthTableStmt, tableNameAuth, authTestParams)
	defer teardownTable2(t)

	// Write config into a file and pass it to command
	toolsFile := tests.GetToolsConfig(sourceConfig, CloudSQLMySQLToolType, paramToolStmt, idParamToolStmt, nameParamToolStmt, arrayToolStmt, authToolStmt)
	toolsFile = tests.AddMySqlExecuteSqlConfig(t, toolsFile)
	tmplSelectCombined, tmplSelectFilterCombined := tests.GetMySQLTmplToolStatement()
	toolsFile = tests.AddTemplateParamConfig(t, toolsFile, CloudSQLMySQLToolType, tmplSelectCombined, tmplSelectFilterCombined, "")
	toolsFile = tests.AddMySQLPrebuiltToolConfig(t, toolsFile)

	cmd, cleanup, err := tests.StartCmd(ctx, toolsFile)
	if err != nil {
		t.Fatalf("command initialization returned an error: %s", err)
	}
	defer cleanup()

	waitCtx, waitCancel := context.WithTimeout(ctx, 10*time.Second)
	defer waitCancel()
	out, err := testutils.WaitForString(waitCtx, regexp.MustCompile(`Server ready to serve`), cmd.Out)
	if err != nil {
		t.Logf("toolbox command logs: \n%s", out)
		t.Fatalf("toolbox didn't start successfully: %s", err)
	}

	// Expected Manifest
	expectedTools := tests.GetBaseMCPExpectedTools()
	expectedTools = append(expectedTools, tests.GetExecuteSQLMCPExpectedTools()...)
	expectedTools = append(expectedTools, tests.GetTemplateParamMCPExpectedTools()...)
	expectedTools = append(expectedTools, []tests.MCPToolManifest{
		{
			Name:        "list_tables",
			Description: "Lists tables in the database.",
			InputSchema: map[string]any{
				"type": "object",
				"properties": map[string]any{
					"output_format": map[string]any{"default": "detailed", "description": "Optional: Use 'simple' for names only or 'detailed' for full info.", "type": "string"},
					"table_names":   map[string]any{"default": "", "description": "Optional: A comma-separated list of table names. If empty, details for all tables will be listed.", "type": "string"},
				},
				"required": []any{},
			},
		},
		{
			Name:        "list_active_queries",
			Description: "Lists active queries in the database.",
			InputSchema: map[string]any{
				"type": "object",
				"properties": map[string]any{
					"limit":             map[string]any{"default": float64(100), "description": "Optional: The maximum number of rows to return.", "type": "integer"},
					"min_duration_secs": map[string]any{"default": float64(0), "description": "Optional: Only show queries running for at least this long in seconds", "type": "integer"},
				},
				"required": []any{},
			},
		},
		{
			Name:        "list_tables_missing_unique_indexes",
			Description: "Lists tables that do not have primary or unique indexes in the database.",
			InputSchema: map[string]any{
				"type": "object",
				"properties": map[string]any{
					"limit":        map[string]any{"default": float64(50), "description": "(Optional) Max rows to return, default is 50", "type": "integer"},
					"table_schema": map[string]any{"default": "", "description": "(Optional) The database where the check is to be performed. Check all tables visible to the current user if not specified", "type": "string"},
				},
				"required": []any{},
			},
		},
		{
			Name:        "list_table_fragmentation",
			Description: "Lists table fragmentation in the database.",
			InputSchema: map[string]any{
				"type": "object",
				"properties": map[string]any{
					"data_free_threshold_bytes": map[string]any{"default": float64(1), "description": "(Optional) Only show tables with at least this much free space in bytes. Default is 1", "type": "integer"},
					"limit":                     map[string]any{"default": float64(10), "description": "(Optional) Max rows to return, default is 10", "type": "integer"},
					"table_name":                map[string]any{"default": "", "description": "(Optional) Name of the table to be checked. Check all tables visible to the current user if not specified.", "type": "string"},
					"table_schema":              map[string]any{"default": "", "description": "(Optional) The database where fragmentation check is to be executed. Check all tables visible to the current user if not specified", "type": "string"},
				},
				"required": []any{},
			},
		},
		{
			Name:        "list_table_stats",
			Description: "Lists table stats in the database.",
			InputSchema: map[string]any{
				"type": "object",
				"properties": map[string]any{
					"connected_schema": map[string]any{"description": "(Optional) The connected db", "type": "string"},
					"limit":            map[string]any{"default": float64(10), "description": "(Optional) Max rows to return, default is 10", "type": "integer"},
					"sort_by":          map[string]any{"default": "", "description": "(Optional) The column to sort by", "type": "string"},
					"table_name":       map[string]any{"default": "", "description": "(Optional) Name of the table to be checked. Check all tables visible to the current user if not specified.", "type": "string"},
					"table_schema":     map[string]any{"default": "", "description": "(Optional) The database where statistics  is to be executed. Check all tables visible to the current user if not specified", "type": "string"},
				},
				"required": []any{},
			},
		},
		{
			Name:        "get_query_plan",
			Description: "Gets the query plan for a SQL statement.",
			InputSchema: map[string]any{
				"type": "object",
				"properties": map[string]any{
					"sql_statement": map[string]any{"type": "string", "description": "The sql statement to explain."},
				},
				"required": []any{"sql_statement"},
			},
		},
		{
			Name:        "show_query_stats",
			Description: "Lists query statistics in the database.",
			InputSchema: map[string]any{
				"type": "object",
				"properties": map[string]any{
					"connected_schema": map[string]any{"description": "(Optional) The database user is connected to, the value is set from env variable CLOUD_SQL_MYSQL_DATABASE or MYSQL_DATABASE", "type": "string"},
					"limit":            map[string]any{"default": float64(10), "description": "(Optional) Max rows to return, default is 10", "type": "integer"},
					"table_schema":     map[string]any{"default": "", "description": "(Optional) The database where query statistics is to be executed. Check all queries visible to the current user if not specified", "type": "string"},
				},
				"required": []any{},
			},
		},
		{
			Name:        "list_all_locks",
			Description: "Lists all table, row locks in the database.",
			InputSchema: map[string]any{
				"type": "object",
				"properties": map[string]any{
					"connected_schema": map[string]any{"description": "(Optional) The database user is connected to, the value is set from env variable CLOUD_SQL_MYSQL_DATABASE or MYSQL_DATABASE", "type": "string"},
					"limit":            map[string]any{"default": float64(10), "description": "(Optional) Max rows to return, default is 10", "type": "integer"},
					"table_name":       map[string]any{"default": "", "description": "(Optional) Name of the table to be checked. Check all tables visible to the current user if not specified.", "type": "string"},
					"table_schema":     map[string]any{"default": "", "description": "(Optional) The database where locked object is detected. Check all databases if not specified.", "type": "string"},
				},
				"required": []any{},
			},
		},
	}...)

	t.Run("verify tools/list registry returns complete manifest", func(t *testing.T) {
		tests.RunMCPToolsListMethod(t, expectedTools)
	})
}

func TestCloudSQLMySQLMCPCallTool(t *testing.T) {
	sourceConfig := getCloudSQLMySQLVars(t)
	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
	defer cancel()

	pool, err := initCloudSQLMySQLConnectionPool(CloudSQLMySQLProject, CloudSQLMySQLRegion, CloudSQLMySQLInstance, "public", CloudSQLMySQLUser, CloudSQLMySQLPass, CloudSQLMySQLDatabase)
	if err != nil {
		t.Fatalf("unable to create Cloud SQL connection pool: %s", err)
	}

	// cleanup test environment
	tests.CleanupMySQLTables(t, ctx, pool)

	// create table name with UUID
	tableNameParam := "param_table_" + strings.ReplaceAll(uuid.New().String(), "-", "")
	tableNameAuth := "auth_table_" + strings.ReplaceAll(uuid.New().String(), "-", "")
	tableNameTemplateParam := "template_param_table_" + strings.ReplaceAll(uuid.New().String(), "-", "")

	// set up data for param tool
	createParamTableStmt, insertParamTableStmt, paramToolStmt, idParamToolStmt, nameParamToolStmt, arrayToolStmt, paramTestParams := tests.GetMySQLParamToolInfo(tableNameParam)
	teardownTable1 := tests.SetupMySQLTable(t, ctx, pool, createParamTableStmt, insertParamTableStmt, tableNameParam, paramTestParams)
	defer teardownTable1(t)

	// set up data for auth tool
	createAuthTableStmt, insertAuthTableStmt, authToolStmt, authTestParams := tests.GetMySQLAuthToolInfo(tableNameAuth)
	teardownTable2 := tests.SetupMySQLTable(t, ctx, pool, createAuthTableStmt, insertAuthTableStmt, tableNameAuth, authTestParams)
	defer teardownTable2(t)

	// Write config into a file and pass it to command
	toolsFile := tests.GetToolsConfig(sourceConfig, CloudSQLMySQLToolType, paramToolStmt, idParamToolStmt, nameParamToolStmt, arrayToolStmt, authToolStmt)
	toolsFile = tests.AddMySqlExecuteSqlConfig(t, toolsFile)
	tmplSelectCombined, tmplSelectFilterCombined := tests.GetMySQLTmplToolStatement()
	toolsFile = tests.AddTemplateParamConfig(t, toolsFile, CloudSQLMySQLToolType, tmplSelectCombined, tmplSelectFilterCombined, "")
	toolsFile = tests.AddMySQLPrebuiltToolConfig(t, toolsFile)

	cmd, cleanup, err := tests.StartCmd(ctx, toolsFile)
	if err != nil {
		t.Fatalf("command initialization returned an error: %s", err)
	}
	defer cleanup()

	waitCtx, waitCancel := context.WithTimeout(ctx, 10*time.Second)
	defer waitCancel()
	out, err := testutils.WaitForString(waitCtx, regexp.MustCompile(`Server ready to serve`), cmd.Out)
	if err != nil {
		t.Logf("toolbox command logs: \n%s", out)
		t.Fatalf("toolbox didn't start successfully: %s", err)
	}

	select1Want, mcpMyFailToolWant, createTableStatement, mcpSelect1Want := tests.GetMySQLWants()

	tests.RunToolInvokeTest(t, select1Want, tests.DisableArrayTest(), tests.WithMCP(), tests.WithNullWant("[]"))
	tests.RunMCPToolCallMethod(t, mcpMyFailToolWant, mcpSelect1Want)
	tests.RunExecuteSqlToolInvokeTest(t, createTableStatement, select1Want, tests.WithMCPSql(), tests.WithExecuteCreateWant("[]"), tests.WithExecuteDropWant("[]"), tests.WithExecuteSelectEmptyWant("[]"))
	tests.RunToolInvokeWithTemplateParameters(t, tableNameTemplateParam, tests.WithMCPTemplate())

	// Run specific MySQL tool tests over MCP
	const expectedOwner = "'toolbox-identity'@'%'"
	tests.RunMySQLListTablesTest(t, CloudSQLMySQLDatabase, tableNameParam, tableNameAuth, expectedOwner, tests.WithMCPExec())
	tests.RunMySQLListActiveQueriesTest(t, ctx, pool, tests.WithMCPExec())
	tests.RunMySQLGetQueryPlanTest(t, ctx, pool, CloudSQLMySQLDatabase, tableNameParam, tests.WithMCPExec())
}