genai-toolbox/internal/tools/looker/lookerrunlook/lookerrunlook.go

// Copyright 2025 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 lookerrunlook

import (
	"context"
	"encoding/json"
	"fmt"

	yaml "github.com/goccy/go-yaml"
	"github.com/googleapis/genai-toolbox/internal/sources"
	lookersrc "github.com/googleapis/genai-toolbox/internal/sources/looker"
	"github.com/googleapis/genai-toolbox/internal/tools"
	"github.com/googleapis/genai-toolbox/internal/tools/looker/lookercommon"
	"github.com/googleapis/genai-toolbox/internal/util"

	"github.com/looker-open-source/sdk-codegen/go/rtl"
	v4 "github.com/looker-open-source/sdk-codegen/go/sdk/v4"
)

const kind string = "looker-run-look"

func init() {
	if !tools.Register(kind, newConfig) {
		panic(fmt.Sprintf("tool kind %q already registered", kind))
	}
}

func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (tools.ToolConfig, error) {
	actual := Config{Name: name}
	if err := decoder.DecodeContext(ctx, &actual); err != nil {
		return nil, err
	}
	return actual, nil
}

type Config struct {
	Name         string   `yaml:"name" validate:"required"`
	Kind         string   `yaml:"kind" validate:"required"`
	Source       string   `yaml:"source" validate:"required"`
	Description  string   `yaml:"description" validate:"required"`
	AuthRequired []string `yaml:"authRequired"`
}

// validate interface
var _ tools.ToolConfig = Config{}

func (cfg Config) ToolConfigKind() string {
	return kind
}

func (cfg Config) Initialize(srcs map[string]sources.Source) (tools.Tool, error) {
	// verify source exists
	rawS, ok := srcs[cfg.Source]
	if !ok {
		return nil, fmt.Errorf("no source named %q configured", cfg.Source)
	}

	// verify the source is compatible
	s, ok := rawS.(*lookersrc.Source)
	if !ok {
		return nil, fmt.Errorf("invalid source for %q tool: source kind must be `looker`", kind)
	}

	lookidParameter := tools.NewStringParameter("look_id", "The id of the look to run.")
	limitParameter := tools.NewIntParameterWithDefault("limit", 500, "The row limit. Default 500")

	parameters := tools.Parameters{
		lookidParameter,
		limitParameter,
	}

	mcpManifest := tools.GetMcpManifest(cfg.Name, cfg.Description, cfg.AuthRequired, parameters)

	// finish tool setup
	return Tool{
		Name:           cfg.Name,
		Kind:           kind,
		Parameters:     parameters,
		AuthRequired:   cfg.AuthRequired,
		UseClientOAuth: s.UseClientOAuth,
		Client:         s.Client,
		ApiSettings:    s.ApiSettings,
		manifest: tools.Manifest{
			Description:  cfg.Description,
			Parameters:   parameters.Manifest(),
			AuthRequired: cfg.AuthRequired,
		},
		mcpManifest: mcpManifest,
	}, nil
}

// validate interface
var _ tools.Tool = Tool{}

type Tool struct {
	Name           string `yaml:"name"`
	Kind           string `yaml:"kind"`
	UseClientOAuth bool
	Client         *v4.LookerSDK
	ApiSettings    *rtl.ApiSettings
	AuthRequired   []string         `yaml:"authRequired"`
	Parameters     tools.Parameters `yaml:"parameters"`
	manifest       tools.Manifest
	mcpManifest    tools.McpManifest
}

func (t Tool) Invoke(ctx context.Context, params tools.ParamValues, accessToken tools.AccessToken) (any, error) {
	logger, err := util.LoggerFromContext(ctx)
	if err != nil {
		return nil, fmt.Errorf("unable to get logger from ctx: %s", err)
	}
	logger.DebugContext(ctx, "params = ", params)
	paramsMap := params.AsMap()

	look_id := paramsMap["look_id"].(string)
	limit := int64(paramsMap["limit"].(int))
	limitStr := fmt.Sprintf("%d", limit)

	sdk, err := lookercommon.GetLookerSDK(t.UseClientOAuth, t.ApiSettings, t.Client, accessToken)
	if err != nil {
		return nil, fmt.Errorf("error getting sdk: %w", err)
	}

	look, err := sdk.Look(look_id, "", t.ApiSettings)
	if err != nil {
		return nil, fmt.Errorf("error getting look definition: %s", err)
	}

	wq := v4.WriteQuery{
		Model:         look.Query.Model,
		View:          look.Query.View,
		Fields:        look.Query.Fields,
		Pivots:        look.Query.Pivots,
		Filters:       look.Query.Filters,
		Sorts:         look.Query.Sorts,
		QueryTimezone: look.Query.QueryTimezone,
		Limit:         &limitStr,
	}

	resp, err := lookercommon.RunInlineQuery(ctx, sdk, &wq, "json", t.ApiSettings)
	if err != nil {
		return nil, fmt.Errorf("error making run_look request: %s", err)
	}
	logger.DebugContext(ctx, "resp = ", resp)

	var data []any
	e := json.Unmarshal([]byte(resp), &data)
	if e != nil {
		return nil, fmt.Errorf("error Unmarshaling run_look response: %s", e)
	}

	logger.DebugContext(ctx, "data = ", data)

	return data, nil
}

func (t Tool) ParseParams(data map[string]any, claims map[string]map[string]any) (tools.ParamValues, error) {
	return tools.ParseParams(t.Parameters, data, claims)
}

func (t Tool) Manifest() tools.Manifest {
	return t.manifest
}

func (t Tool) McpManifest() tools.McpManifest {
	return t.mcpManifest
}

func (t Tool) Authorized(verifiedAuthServices []string) bool {
	return tools.IsAuthorized(t.AuthRequired, verifiedAuthServices)
}

func (t Tool) RequiresClientAuthorization() bool {
	return t.UseClientOAuth
}