import { z } from "zod";
import { withAuth } from "../../auth/index.js";
import { withAuthParams } from "../helpers/authSchema.js";
import { handleToolError } from "../helpers/errorHandler.js";
import { callSchemaEndpoint } from "./_schemaEndpoint.js";

// Tool: delete_field
// Borra un campo del schema y opcionalmente su columna MySQL (dropColumn=true).
// Si dropColumn=false y la columna tiene datos, el backend devuelve error con
// dataCount para permitir confirmacion explicita.

export function registerDeleteFieldTool(server) {
    server.tool(
        "delete_field",
        `Delete a field from a table.

 - dropColumn=false (default): removes only the schema entry. If the MySQL
   column has data, backend refuses and returns dataCount so you can warn
   the user.
 - dropColumn=true: ALTER TABLE DROP COLUMN. Data in that column is lost
   permanently.

Table names WITHOUT 'cms_' prefix.`,
        withAuthParams({
            tableName: z.string().describe("Table name without 'cms_' prefix"),
            fieldName: z.string().describe("Field name to delete"),
            dropColumn: z.boolean().optional().describe("If true, DROP COLUMN in MySQL. Default false."),
        }),
        { readOnlyHint: false, destructiveHint: true },
        withAuth(async ({ tableName, fieldName, dropColumn }, _extra) => {
            try {
                const body = {
                    tableName,
                    fieldName,
                    confirm: true,
                    dropColumn: dropColumn === true,
                };
                const { mcp } = await callSchemaEndpoint("/api/schema/delete-field", body);
                return mcp;
            } catch (error) {
                return handleToolError(error, "delete_field", { tableName, fieldName, dropColumn: dropColumn === true });
            }
        })
    );
}