'use strict';

import { defineTool } from '../../src/index.js';

/**
 * Weather tool — returns static weather data for demo/testing.
 */
const weatherTool = defineTool({
    name: 'get_weather',
    description: 'Get the current weather for a given city.',
    parameters: {
        type: 'object',
        additionalProperties: false,
        required: ['city'],
        properties: {
            city: {
                type: 'string',
                description: 'City name, e.g. "Berlin"',
            },
            unit: {
                type: 'string',
                enum: ['celsius', 'fahrenheit'],
                description: 'Temperature unit (default: celsius)',
            },
        },
    },
    invoke: async ({ city, unit = 'celsius' }) => {
        const db = {
            berlin:    { temp: 18, condition: 'partly cloudy', humidity: 62 },
            munich:    { temp: 22, condition: 'sunny',         humidity: 45 },
            hamburg:   { temp: 15, condition: 'rainy',         humidity: 80 },
            london:    { temp: 14, condition: 'overcast',      humidity: 75 },
            paris:     { temp: 20, condition: 'sunny',         humidity: 50 },
            tokyo:     { temp: 28, condition: 'humid',         humidity: 85 },
            'new york': { temp: 25, condition: 'clear',        humidity: 55 },
        };

        const entry = db[city.toLowerCase()];
        if (!entry) {
            const available = Object.keys(db).map((c) => `"${c}"`).join(', ');
            throw new Error(`City "${city}" not found in database. Available cities are: ${available}.`);
        }
        let temp = entry.temp;
        if (unit === 'fahrenheit') temp = Math.round(temp * 9 / 5 + 32);

        return {
            city,
            temperature: temp,
            unit,
            condition: entry.condition,
            humidity: entry.humidity,
        };
    },
});

export { weatherTool };