import type { MilaDashboardData, DayDetailData } from './types'

const API_BASE = '/duckdb-api/v1'

export function getLocalDateString(): string {
  const d = new Date()
  const year = d.getFullYear()
  const month = String(d.getMonth() + 1).padStart(2, '0')
  const day = String(d.getDate()).padStart(2, '0')
  return `${year}-${month}-${day}`
}

export async function fetchMilaDashboard(asOf?: string): Promise<MilaDashboardData> {
  const url = asOf ? `${API_BASE}/mila/dashboard?as_of=${encodeURIComponent(asOf)}` : `${API_BASE}/mila/dashboard`
  const res = await fetch(url)
  if (!res.ok) {
    throw new Error(`Failed to fetch dashboard: ${res.status} ${res.statusText}`)
  }
  return res.json()
}

export async function fetchMilaDayDetail(date: string): Promise<DayDetailData> {
  const res = await fetch(`${API_BASE}/mila/day/${encodeURIComponent(date)}`)
  if (!res.ok) {
    throw new Error(`Failed to fetch day detail for ${date}: ${res.statusText}`)
  }
  return res.json()
}

export async function logEvent(payload: {
  kind: string
  subject: string
  payload: Record<string, any>
  start?: string
  end?: string
  date?: string
  since?: string
  note?: string
  actor?: string
}): Promise<any> {
  const res = await fetch(`${API_BASE}/events`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(payload),
  })
  if (!res.ok) {
    const err = await res.json().catch(() => ({ detail: res.statusText }))
    throw new Error(err.detail || 'Failed to log event')
  }
  return res.json()
}

export async function stopSleepEvent(payload: {
  subject: string
  end_time?: string
  since?: string
  event_id?: string
}): Promise<any> {
  const res = await fetch(`${API_BASE}/events/stop`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      kind: 'sleep.session',
      ...payload,
    }),
  })
  if (!res.ok) {
    const err = await res.json().catch(() => ({ detail: res.statusText }))
    throw new Error(err.detail || 'Failed to stop sleep event')
  }
  return res.json()
}

export async function deleteEvent(eventId: string): Promise<any> {
  const res = await fetch(`${API_BASE}/events/${encodeURIComponent(eventId)}`, {
    method: 'DELETE',
  })
  if (!res.ok) {
    const err = await res.json().catch(() => ({ detail: res.statusText }))
    throw new Error(err.detail || 'Failed to delete event')
  }
  return res.json()
}