import { tool } from '@strands-agents/sdk'
import { z } from 'zod'

export const currentTimeTool = tool({
  name: 'current_time',
  description: 'Get current date/time (ISO + locale)',
  inputSchema: z.object({ timezone: z.string().optional() }),
  callback: (input) => {
    const d = new Date()
    return JSON.stringify({
      iso: d.toISOString(),
      locale: d.toLocaleString(undefined, input.timezone ? { timeZone: input.timezone } : undefined),
      timestamp: d.getTime(),
      timezone: input.timezone || Intl.DateTimeFormat().resolvedOptions().timeZone,
    })
  },
})

export const updateUIConfigTool = tool({
  name: 'update_ui_config',
  description: 'Update UI settings (fontSize, debounceMs, theme)',
  inputSchema: z.object({
    fontSize: z.number().optional(),
    debounceMs: z.number().optional(),
    theme: z.enum(['dark', 'light']).optional(),
  }),
  callback: (input) => {
    try {
      const raw = localStorage.getItem('careless-v2-settings')
      const s = raw ? JSON.parse(raw) : {}
      Object.assign(s, input)
      localStorage.setItem('careless-v2-settings', JSON.stringify(s))
      if (input.theme) {
        document.documentElement.setAttribute('data-theme', input.theme)
        localStorage.setItem('careless-v2-theme', input.theme)
      }
      window.dispatchEvent(new CustomEvent('careless:settings-updated', { detail: s }))
      return JSON.stringify({ status: 'success', applied: input })
    } catch (err: unknown) {
      return JSON.stringify({ status: 'error', error: (err as Error).message })
    }
  },
})

export const WRITING_TOOLS = [currentTimeTool, updateUIConfigTool]