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package github

import (

"context"

"encoding/json"

"fmt"

"io"

"net/http"

ghErrors "github.com/github/github-mcp-server/pkg/errors"

"github.com/github/github-mcp-server/pkg/inventory"

"github.com/github/github-mcp-server/pkg/scopes"

"github.com/github/github-mcp-server/pkg/translations"

"github.com/github/github-mcp-server/pkg/utils"

"github.com/google/go-github/v87/github"

"github.com/google/jsonschema-go/jsonschema"

"github.com/modelcontextprotocol/go-sdk/mcp"

)

func GetDependabotAlert(t translations.TranslationHelperFunc) inventory.ServerTool {

return NewTool(

ToolsetMetadataDependabot,

mcp.Tool{

Name: "get_dependabot_alert",

Description: t("TOOL_GET_DEPENDABOT_ALERT_DESCRIPTION", "Get details of a specific dependabot alert in a GitHub repository."),

Annotations: &mcp.ToolAnnotations{

Title: t("TOOL_GET_DEPENDABOT_ALERT_USER_TITLE", "Get dependabot alert"),

ReadOnlyHint: true,

},

InputSchema: &jsonschema.Schema{

Type: "object",

Properties: map[string]*jsonschema.Schema{

"owner": {

Type: "string",

Description: "The owner of the repository.",

},

"repo": {

Type: "string",

Description: "The name of the repository.",

},

"alertNumber": {

Type: "number",

Description: "The number of the alert.",

},

},

Required: []string{"owner", "repo", "alertNumber"},

},

},

[]scopes.Scope{scopes.SecurityEvents},

func(ctx context.Context, deps ToolDependencies, _ *mcp.CallToolRequest, args map[string]any) (*mcp.CallToolResult, any, error) {

owner, err := RequiredParam[string](args, "owner")

if err != nil {

return utils.NewToolResultError(err.Error()), nil, nil

}

repo, err := RequiredParam[string](args, "repo")

if err != nil {

return utils.NewToolResultError(err.Error()), nil, nil

}

alertNumber, err := RequiredInt(args, "alertNumber")

if err != nil {

return utils.NewToolResultError(err.Error()), nil, nil

}

client, err := deps.GetClient(ctx)

if err != nil {

return utils.NewToolResultErrorFromErr("failed to get GitHub client", err), nil, err

}

alert, resp, err := client.Dependabot.GetRepoAlert(ctx, owner, repo, alertNumber)

if err != nil {

return ghErrors.NewGitHubAPIErrorResponse(ctx,

dependabotErrMsg(fmt.Sprintf("failed to get alert with number '%d'", alertNumber), owner, repo, resp),

resp,

err,

), nil, nil

}

defer func() { _ = resp.Body.Close() }()

if resp.StatusCode != http.StatusOK {

body, err := io.ReadAll(resp.Body)

if err != nil {

return utils.NewToolResultErrorFromErr("failed to read response body", err), nil, err

}

return ghErrors.NewGitHubAPIStatusErrorResponse(ctx, "failed to get alert", resp, body), nil, nil

}

r, err := json.Marshal(alert)

if err != nil {

return utils.NewToolResultErrorFromErr("failed to marshal alert", err), nil, err

}

return utils.NewToolResultText(string(r)), nil, nil

},

)

}

func ListDependabotAlerts(t translations.TranslationHelperFunc) inventory.ServerTool {

schema := &jsonschema.Schema{

Type: "object",

Properties: map[string]*jsonschema.Schema{

"owner": {

Type: "string",

Description: "The owner of the repository.",

},

"repo": {

Type: "string",

Description: "The name of the repository.",

},

"state": {

Type: "string",

Description: "Filter dependabot alerts by state. Defaults to open",

Enum: []any{"open", "fixed", "dismissed", "auto_dismissed"},

Default: json.RawMessage(`"open"`),

},

"severity": {

Type: "string",

Description: "Filter dependabot alerts by severity",

Enum: []any{"low", "medium", "high", "critical"},

},

},

Required: []string{"owner", "repo"},

}

WithPagination(schema)

return NewTool(

ToolsetMetadataDependabot,

mcp.Tool{

Name: "list_dependabot_alerts",

Description: t("TOOL_LIST_DEPENDABOT_ALERTS_DESCRIPTION", "List dependabot alerts in a GitHub repository."),

Annotations: &mcp.ToolAnnotations{

Title: t("TOOL_LIST_DEPENDABOT_ALERTS_USER_TITLE", "List dependabot alerts"),

ReadOnlyHint: true,

},

InputSchema: schema,

},

[]scopes.Scope{scopes.SecurityEvents},

func(ctx context.Context, deps ToolDependencies, _ *mcp.CallToolRequest, args map[string]any) (*mcp.CallToolResult, any, error) {

owner, err := RequiredParam[string](args, "owner")

if err != nil {

return utils.NewToolResultError(err.Error()), nil, nil

}

repo, err := RequiredParam[string](args, "repo")

if err != nil {

return utils.NewToolResultError(err.Error()), nil, nil

}

state, err := OptionalParam[string](args, "state")

if err != nil {

return utils.NewToolResultError(err.Error()), nil, nil

}

severity, err := OptionalParam[string](args, "severity")

if err != nil {

return utils.NewToolResultError(err.Error()), nil, nil

}

pagination, err := OptionalPaginationParams(args)

if err != nil {

return utils.NewToolResultError(err.Error()), nil, nil

}

client, err := deps.GetClient(ctx)

if err != nil {

return utils.NewToolResultErrorFromErr("failed to get GitHub client", err), nil, err

}

alerts, resp, err := client.Dependabot.ListRepoAlerts(ctx, owner, repo, &github.ListAlertsOptions{

State: ToStringPtr(state),

Severity: ToStringPtr(severity),

ListOptions: github.ListOptions{

Page: pagination.Page,

PerPage: pagination.PerPage,

},

})

if err != nil {

return ghErrors.NewGitHubAPIErrorResponse(ctx,

dependabotErrMsg(fmt.Sprintf("failed to list alerts for repository '%s/%s'", owner, repo), owner, repo, resp),

resp,

err,

), nil, nil

}

defer func() { _ = resp.Body.Close() }()

if resp.StatusCode != http.StatusOK {

body, err := io.ReadAll(resp.Body)

if err != nil {

return utils.NewToolResultErrorFromErr("failed to read response body", err), nil, err

}

return ghErrors.NewGitHubAPIStatusErrorResponse(ctx, "failed to list alerts", resp, body), nil, nil

}

r, err := json.Marshal(alerts)

if err != nil {

return utils.NewToolResultErrorFromErr("failed to marshal alerts", err), nil, err

}

return utils.NewToolResultText(string(r)), nil, nil

},

)

}

// dependabotErrMsg enhances error messages for dependabot API failures by

// appending a hint about token permissions when the response indicates

// the token may lack access to the repository (403 or 404).

func dependabotErrMsg(base, owner, repo string, resp *github.Response) string {

if resp != nil && (resp.StatusCode == http.StatusForbidden || resp.StatusCode == http.StatusNotFound) {

return fmt.Sprintf("%s. Your token may not have access to Dependabot alerts on %s/%s. "+

"To access Dependabot alerts, the token needs the 'security_events' scope or, for fine-grained tokens, "+

"Dependabot alerts read permission for this specific repository.",

base, owner, repo)

}

return base

}