// 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 snowflakesql_test

import (
	"testing"

	yaml "github.com/goccy/go-yaml"
	"github.com/google/go-cmp/cmp"
	"github.com/googleapis/genai-toolbox/internal/server"
	"github.com/googleapis/genai-toolbox/internal/testutils"
	"github.com/googleapis/genai-toolbox/internal/tools/snowflake/snowflakesql"
)

func TestParseFromYaml(t *testing.T) {
	ctx, err := testutils.ContextWithNewLogger()
	if err != nil {
		t.Fatalf("unexpected error: %s", err)
	}
	tcs := []struct {
		desc string
		in   string
		want server.ToolConfigs
	}{
		{
			desc: "basic example",
			in: `
				tools:
					my-snowflake-tool:
						kind: snowflake-sql
						source: my-snowflake-source
						description: Execute parameterized SQL on Snowflake
						statement: SELECT * FROM my_table WHERE id = $1
			`,
			want: server.ToolConfigs{
				"my-snowflake-tool": snowflakesql.Config{
					Name:               "my-snowflake-tool",
					Kind:               "snowflake-sql",
					Source:             "my-snowflake-source",
					Description:        "Execute parameterized SQL on Snowflake",
					Statement:          "SELECT * FROM my_table WHERE id = $1",
					AuthRequired:       []string{},
					Parameters:         nil,
					TemplateParameters: nil,
				},
			},
		},
	}
	for _, tc := range tcs {
		t.Run(tc.desc, func(t *testing.T) {
			got := struct {
				Tools server.ToolConfigs `yaml:"tools"`
			}{}
			// Parse contents
			err := yaml.UnmarshalContext(ctx, testutils.FormatYaml(tc.in), &got)
			if err != nil {
				t.Fatalf("unable to unmarshal: %s", err)
			}
			if diff := cmp.Diff(tc.want, got.Tools); diff != "" {
				t.Fatalf("incorrect parse: diff %v", diff)
			}
		})
	}
}

func TestFailParseFromYaml(t *testing.T) {
	ctx, err := testutils.ContextWithNewLogger()
	if err != nil {
		t.Fatalf("unexpected error: %s", err)
	}
	tcs := []struct {
		desc string
		in   string
		err  string
	}{
		{
			desc: "missing required field",
			in: `
				tools:
					my-snowflake-tool:
						kind: snowflake-sql
						source: my-snowflake-source
						description: Execute parameterized SQL on Snowflake
			`,
			err: "unable to parse tool \"my-snowflake-tool\" as kind \"snowflake-sql\": Key: 'Config.Statement' Error:Field validation for 'Statement' failed on the 'required' tag",
		},
	}
	for _, tc := range tcs {
		t.Run(tc.desc, func(t *testing.T) {
			got := struct {
				Tools server.ToolConfigs `yaml:"tools"`
			}{}
			// Parse contents
			err := yaml.UnmarshalContext(ctx, testutils.FormatYaml(tc.in), &got)
			if err == nil {
				t.Fatalf("expect parsing to fail")
			}
			errStr := err.Error()
			if errStr != tc.err {
				t.Fatalf("unexpected error: got %q, want %q", errStr, tc.err)
			}
		})
	}
}
