// BASE is the Next.js rewrite prefix defined in next.config.ts:
//   /api/backend/:path* → http://backend:8000/:path*
// All fetch paths below start with /api/... giving the full path /api/backend/api/...
// This double "api" is intentional: /api/backend is the proxy mount point, /api/... is the FastAPI route.
const BASE = process.env.NEXT_PUBLIC_API_URL ?? "/api/backend"

async function apiFetch<T>(path: string, init?: RequestInit): Promise<T> {
  const res = await fetch(`${BASE}${path}`, { cache: "no-store", ...init })
  if (!res.ok) throw new Error(`API ${path} → ${res.status}`)
  if (res.status === 204) return undefined as T
  return res.json()
}

// ── Types ────────────────────────────────────────────────────────

export type KpiData = {
  total_power_kw: number
  pue: number
  avg_temperature: number
  active_alarms: number
}

export type PowerBucket = {
  bucket: string
  total_kw: number
}

export type TempBucket = {
  bucket: string
  room_id: string
  avg_temp: number
}

export type Alarm = {
  id: number
  sensor_id: string | null
  site_id: string
  room_id: string | null
  rack_id: string | null
  severity: "critical" | "warning" | "info"
  message: string
  state: string
  triggered_at: string
}

export type RoomStatus = {
  room_id: string
  avg_temp: number
  total_kw: number
  alarm_count: number
  status: "ok" | "warning" | "critical"
}

// ── Fetchers ─────────────────────────────────────────────────────

export const fetchKpis = (siteId: string) =>
  apiFetch<KpiData>(`/api/readings/kpis?site_id=${siteId}`)

export const fetchPowerHistory = (siteId: string, hours = 1) =>
  apiFetch<PowerBucket[]>(`/api/readings/site-power-history?site_id=${siteId}&hours=${hours}`)

export const fetchTempHistory = (siteId: string, hours = 1) =>
  apiFetch<TempBucket[]>(`/api/readings/room-temp-history?site_id=${siteId}&hours=${hours}`)

export const fetchAlarms = (siteId: string, state = "active", limit = 100) =>
  apiFetch<Alarm[]>(`/api/alarms?site_id=${siteId}&state=${state}&limit=${limit}`)

export const fetchRoomStatus = (siteId: string) =>
  apiFetch<RoomStatus[]>(`/api/readings/room-status?site_id=${siteId}`)

export type AlarmStats = {
  active: number
  acknowledged: number
  resolved: number
  critical: number
  warning: number
}

export const fetchAlarmStats = (siteId: string) =>
  apiFetch<AlarmStats>(`/api/alarms/stats?site_id=${siteId}`)

export const acknowledgeAlarm = async (alarmId: number): Promise<void> => {
  const res = await fetch(`${BASE}/api/alarms/${alarmId}/acknowledge`, { method: "POST" })
  if (!res.ok) throw new Error(`Acknowledge failed: ${res.status}`)
}

export const resolveAlarm = async (alarmId: number): Promise<void> => {
  const res = await fetch(`${BASE}/api/alarms/${alarmId}/resolve`, { method: "POST" })
  if (!res.ok) throw new Error(`Resolve failed: ${res.status}`)
}

export type RackAsset = {
  rack_id: string
  temp: number | null
  power_kw: number | null
  status: "ok" | "warning" | "critical" | "unknown"
  alarm_count: number
}

export type CracAsset = {
  crac_id: string
  state: "online" | "fault" | "unknown"
  supply_temp: number | null
  return_temp: number | null
  fan_pct: number | null
}

export type UpsAsset = {
  ups_id: string
  state: "online" | "battery" | "overload" | "unknown"
  charge_pct: number | null
  load_pct: number | null
  runtime_min: number | null
  voltage_v: number | null
}

export type UpsHistoryPoint = {
  bucket: string
  charge_pct: number | null
  load_pct: number | null
  runtime_min: number | null
  voltage_v: number | null
}

export type AssetsData = {
  site_id: string
  rooms: { room_id: string; crac: CracAsset; racks: RackAsset[] }[]
  ups_units: UpsAsset[]
}

export const fetchAssets = (siteId: string) =>
  apiFetch<AssetsData>(`/api/assets?site_id=${siteId}`)

export type RackPower = { rack_id: string; power_kw: number | null }
export type RoomPowerBreakdown = { room_id: string; racks: RackPower[] }
export type PowerHistoryBucket = { bucket: string; room_id: string; total_kw: number }

export const fetchRackBreakdown = (siteId: string) =>
  apiFetch<RoomPowerBreakdown[]>(`/api/power/rack-breakdown?site_id=${siteId}`)

export const fetchRoomPowerHistory = (siteId: string, hours = 6) =>
  apiFetch<PowerHistoryBucket[]>(`/api/power/room-history?site_id=${siteId}&hours=${hours}`)

export const fetchUpsStatus = (siteId: string) =>
  apiFetch<UpsAsset[]>(`/api/power/ups?site_id=${siteId}`)

export const fetchUpsHistory = (siteId: string, upsId: string, hours = 6) =>
  apiFetch<UpsHistoryPoint[]>(`/api/power/ups/history?site_id=${siteId}&ups_id=${upsId}&hours=${hours}`)

export type RackEnvReading = { rack_id: string; temperature: number | null; humidity: number | null }
export type RoomEnvReadings = { room_id: string; racks: RackEnvReading[] }
export type HumidityBucket = { bucket: string; room_id: string; avg_humidity: number }
export type CracStatus = {
  crac_id: string
  room_id: string | null
  state: "online" | "fault"
  delta: number | null
  rated_capacity_kw: number
  // Thermal
  supply_temp: number | null
  return_temp: number | null
  supply_humidity: number | null
  return_humidity: number | null
  airflow_cfm: number | null
  filter_dp_pa: number | null
  // Capacity
  cooling_capacity_kw: number | null
  cooling_capacity_pct: number | null
  cop: number | null
  sensible_heat_ratio: number | null
  // Compressor
  compressor_state: number | null
  compressor_load_pct: number | null
  compressor_power_kw: number | null
  compressor_run_hours: number | null
  high_pressure_bar: number | null
  low_pressure_bar: number | null
  discharge_superheat_c: number | null
  liquid_subcooling_c: number | null
  // Fan
  fan_pct: number | null
  fan_rpm: number | null
  fan_power_kw: number | null
  fan_run_hours: number | null
  // Electrical
  total_unit_power_kw: number | null
  input_voltage_v: number | null
  input_current_a: number | null
  power_factor: number | null
}

export type CracHistoryPoint = {
  bucket: string
  supply_temp: number | null
  return_temp: number | null
  delta_t: number | null
  capacity_kw: number | null
  capacity_pct: number | null
  cop: number | null
  comp_load: number | null
  filter_dp: number | null
  fan_pct: number | null
}

export const fetchRackEnvReadings  = (siteId: string) =>
  apiFetch<RoomEnvReadings[]>(`/api/env/rack-readings?site_id=${siteId}`)

export const fetchHumidityHistory  = (siteId: string, hours = 6) =>
  apiFetch<HumidityBucket[]>(`/api/env/humidity-history?site_id=${siteId}&hours=${hours}`)

export const fetchCracStatus       = (siteId: string) =>
  apiFetch<CracStatus[]>(`/api/env/crac-status?site_id=${siteId}`)

export type RackHistoryPoint = { bucket: string; temperature?: number; humidity?: number; power_kw?: number }
export type RackHistory = { rack_id: string; site_id: string; history: RackHistoryPoint[]; alarms: Alarm[] }

export const fetchRackHistory = (siteId: string, rackId: string, hours = 6) =>
  apiFetch<RackHistory>(`/api/env/rack-history?site_id=${siteId}&rack_id=${rackId}&hours=${hours}`)

export type CracDeltaPoint = { bucket: string; delta: number }

export const fetchCracDeltaHistory = (siteId: string, cracId: string, hours = 1) =>
  apiFetch<CracDeltaPoint[]>(`/api/env/crac-delta-history?site_id=${siteId}&crac_id=${cracId}&hours=${hours}`)

export const fetchCracHistory = (siteId: string, cracId: string, hours = 6) =>
  apiFetch<CracHistoryPoint[]>(`/api/env/crac-history?site_id=${siteId}&crac_id=${cracId}&hours=${hours}`)

export type ReportSummary = {
  site_id: string
  generated_at: string
  kpis: { total_power_kw: number; avg_temperature: number }
  alarm_stats: { active: number; acknowledged: number; resolved: number; critical: number; warning: number }
  crac_uptime: { crac_id: string; room_id: string; uptime_pct: number }[]
  ups_uptime: { ups_id: string; uptime_pct: number }[]
}

export const fetchReportSummary = (siteId: string) =>
  apiFetch<ReportSummary>(`/api/reports/summary?site_id=${siteId}`)

export const reportExportUrl = (type: "power" | "temperature" | "alarms", siteId: string, hours = 24) =>
  type === "alarms"
    ? `${BASE}/api/reports/export/alarms?site_id=${siteId}`
    : `${BASE}/api/reports/export/${type}?site_id=${siteId}&hours=${hours}`

export type RackCapacity = {
  rack_id: string
  room_id: string
  power_kw: number | null
  power_capacity_kw: number
  power_pct: number | null
  temp: number | null
}

export type RoomCapacity = {
  room_id: string
  power:   { used_kw: number; capacity_kw: number; pct: number; headroom_kw: number }
  cooling: { load_kw: number; capacity_kw: number; pct: number; headroom_kw: number }
  space:   { racks_total: number; racks_populated: number; pct: number }
}

export type CapacitySummary = {
  site_id: string
  config:  { rack_power_kw: number; room_power_kw: number; crac_cooling_kw: number; rack_u_total: number }
  rooms:   RoomCapacity[]
  racks:   RackCapacity[]
}

export const fetchCapacitySummary = (siteId: string) =>
  apiFetch<CapacitySummary>(`/api/capacity/summary?site_id=${siteId}`)

export type Device = {
  device_id:    string
  name:         string
  type:         "server" | "switch" | "patch_panel" | "pdu" | "storage" | "firewall" | "kvm"
  rack_id:      string
  room_id:      string
  site_id:      string
  u_start:      number
  u_height:     number
  ip:           string
  serial:       string
  model:        string
  status:       "online" | "offline" | "unknown"
  power_draw_w: number
}

export const fetchAllDevices = (siteId: string) =>
  apiFetch<Device[]>(`/api/assets/devices?site_id=${siteId}`)

export const fetchRackDevices = (siteId: string, rackId: string) =>
  apiFetch<Device[]>(`/api/assets/rack-devices?site_id=${siteId}&rack_id=${rackId}`)

// ── Generator ─────────────────────────────────────────────────────

export type GeneratorStatus = {
  gen_id: string
  state: "standby" | "running" | "test" | "fault" | "unknown"
  fuel_pct: number | null
  fuel_litres: number | null
  fuel_rate_lph: number | null
  load_kw: number | null
  load_pct: number | null
  run_hours: number | null
  voltage_v: number | null
  frequency_hz: number | null
  engine_rpm: number | null
  oil_pressure_bar: number | null
  coolant_temp_c: number | null
  exhaust_temp_c: number | null
  alternator_temp_c: number | null
  power_factor: number | null
  battery_v: number | null
}

export type GeneratorHistoryPoint = {
  bucket: string
  load_pct: number | null
  fuel_pct: number | null
  coolant_temp_c: number | null
  exhaust_temp_c: number | null
  frequency_hz: number | null
  alternator_temp_c: number | null
}

export const fetchGeneratorStatus = (siteId: string) =>
  apiFetch<GeneratorStatus[]>(`/api/generator/status?site_id=${siteId}`)

export const fetchGeneratorHistory = (siteId: string, genId: string, hours = 6) =>
  apiFetch<GeneratorHistoryPoint[]>(`/api/generator/history?site_id=${siteId}&gen_id=${genId}&hours=${hours}`)

// ── ATS ───────────────────────────────────────────────────────────

export type AtsStatus = {
  ats_id: string
  state: "stable" | "transferring"
  active_feed: "utility-a" | "utility-b" | "generator"
  transfer_count: number
  last_transfer_ms: number | null
  utility_a_v: number | null
  utility_b_v: number | null
  generator_v: number | null
}

export const fetchAtsStatus = (siteId: string) =>
  apiFetch<AtsStatus[]>(`/api/power/ats?site_id=${siteId}`)

// ── Phase breakdown ───────────────────────────────────────────────

export type RackPhase = {
  rack_id: string
  room_id: string
  phase_a_kw: number | null
  phase_b_kw: number | null
  phase_c_kw: number | null
  phase_a_a: number | null
  phase_b_a: number | null
  phase_c_a: number | null
  imbalance_pct: number | null
}
export type RoomPhase = { room_id: string; racks: RackPhase[] }

export const fetchPhaseBreakdown = (siteId: string) =>
  apiFetch<RoomPhase[]>(`/api/power/phase?site_id=${siteId}`)

// ── Power redundancy ──────────────────────────────────────────────

export type PowerRedundancy = {
  site_id: string
  level: "2N" | "N+1" | "N"
  ups_total: number
  ups_online: number
  generator_ok: boolean
  ats_active_feed: string | null
  notes: string
}

export const fetchPowerRedundancy = (siteId: string) =>
  apiFetch<PowerRedundancy>(`/api/power/redundancy?site_id=${siteId}`)

// ── Utility power ─────────────────────────────────────────────────

export type UtilityPower = {
  site_id: string
  total_kw: number
  tariff_sgd_kwh: number
  kwh_month_to_date: number
  cost_sgd_mtd: number
  kwh_annual_est: number
  cost_sgd_annual_est: number
  currency: string
}

export const fetchUtilityPower = (siteId: string) =>
  apiFetch<UtilityPower>(`/api/power/utility?site_id=${siteId}`)

// ── Chiller ───────────────────────────────────────────────────────

export type ChillerStatus = {
  chiller_id: string
  state: "online" | "fault" | "unknown"
  chw_supply_c: number | null
  chw_return_c: number | null
  chw_delta_c: number | null
  flow_gpm: number | null
  cooling_load_kw: number | null
  cooling_load_pct: number | null
  cop: number | null
  compressor_load_pct: number | null
  condenser_pressure_bar: number | null
  evaporator_pressure_bar: number | null
  cw_supply_c: number | null
  cw_return_c: number | null
  run_hours: number | null
}

export type ChillerHistoryPoint = {
  bucket: string
  cop: number | null
  load_kw: number | null
  load_pct: number | null
  chw_supply_c: number | null
  chw_return_c: number | null
  comp_load: number | null
}

export const fetchChillerStatus = (siteId: string) =>
  apiFetch<ChillerStatus[]>(`/api/cooling/status?site_id=${siteId}`)

export const fetchChillerHistory = (siteId: string, chillerId: string, hours = 6) =>
  apiFetch<ChillerHistoryPoint[]>(`/api/cooling/history?site_id=${siteId}&chiller_id=${chillerId}&hours=${hours}`)

// ── Fire / VESDA ──────────────────────────────────────────────────

export type FireZoneStatus = {
  zone_id: string
  room_id: string | null
  level: "normal" | "alert" | "action" | "fire"
  obscuration_pct_m: number | null
  detector_1_ok: boolean
  detector_2_ok: boolean
  power_ok: boolean
  flow_ok: boolean
}

export const fetchFireStatus = (siteId: string) =>
  apiFetch<FireZoneStatus[]>(`/api/fire/status?site_id=${siteId}`)

// ── Leak sensors ──────────────────────────────────────────────────

export type LeakSensorStatus = {
  sensor_id: string
  floor_zone: string
  under_floor: boolean
  near_crac: boolean
  room_id: string | null
  state: "clear" | "detected" | "unknown"
  recorded_at: string | null
}

export const fetchLeakStatus = (siteId: string) =>
  apiFetch<LeakSensorStatus[]>(`/api/leak/status?site_id=${siteId}`)

// ── Energy report ─────────────────────────────────────────────────

export type EnergyReport = {
  site_id: string
  period_days: number
  from_date: string
  to_date: string
  kwh_total: number
  cost_sgd: number
  tariff_sgd_kwh: number
  currency: string
  pue_estimated: number
  pue_trend: { day: string; avg_it_kw: number; pue_est: number }[]
}

export const fetchEnergyReport = (siteId: string, days = 30) =>
  apiFetch<EnergyReport>(`/api/reports/energy?site_id=${siteId}&days=${days}`)

// ── Network ───────────────────────────────────────────────────────

export type NetworkSwitchStatus = {
  switch_id:           string
  name:                string
  model:               string
  room_id:             string
  rack_id:             string
  role:                "core" | "edge" | "access"
  port_count:          number
  state:               "up" | "degraded" | "down" | "unknown"
  uptime_s:            number | null
  active_ports:        number | null
  bandwidth_in_mbps:   number | null
  bandwidth_out_mbps:  number | null
  cpu_pct:             number | null
  mem_pct:             number | null
  temperature_c:       number | null
  packet_loss_pct:     number | null
}

export const fetchNetworkStatus = (siteId: string) =>
  apiFetch<NetworkSwitchStatus[]>(`/api/network/status?site_id=${siteId}`)

export type PduReading = {
  rack_id:       string
  room_id:       string
  total_kw:      number | null
  phase_a_kw:    number | null
  phase_b_kw:    number | null
  phase_c_kw:    number | null
  phase_a_a:     number | null
  phase_b_a:     number | null
  phase_c_a:     number | null
  imbalance_pct: number | null
  status:        "ok" | "warning" | "critical"
}

export const fetchPduReadings = (siteId: string) =>
  apiFetch<PduReading[]>(`/api/assets/pdus?site_id=${siteId}`)

// ── Maintenance Windows ───────────────────────────────────────────

export type MaintenanceWindow = {
  id:              string
  site_id:         string
  title:           string
  target:          string
  target_label:    string
  start_dt:        string
  end_dt:          string
  suppress_alarms: boolean
  notes:           string
  created_at:      string
  status:          "active" | "scheduled" | "expired"
}

export const fetchMaintenanceWindows = (siteId: string) =>
  apiFetch<MaintenanceWindow[]>(`/api/maintenance?site_id=${siteId}`)

export const fetchActiveMaintenanceWindows = (siteId: string) =>
  apiFetch<MaintenanceWindow[]>(`/api/maintenance/active?site_id=${siteId}`)

export const createMaintenanceWindow = (body: {
  site_id: string; title: string; target: string; target_label: string;
  start_dt: string; end_dt: string; suppress_alarms: boolean; notes: string;
}) => apiFetch<MaintenanceWindow>("/api/maintenance", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(body) })

export const deleteMaintenanceWindow = (id: string) =>
  apiFetch<void>(`/api/maintenance/${id}`, { method: "DELETE" })

// ── Floor layout ──────────────────────────────────────────────────

export const fetchFloorLayout = (siteId: string) =>
  apiFetch<Record<string, unknown>>(`/api/floor-layout?site_id=${siteId}`)

export const saveFloorLayout = (siteId: string, layout: Record<string, unknown>) =>
  apiFetch<{ ok: boolean }>(`/api/floor-layout?site_id=${siteId}`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(layout),
  })

export type ParticleStatus = {
  room_id:         string
  particles_0_5um: number | null
  particles_5um:   number | null
  iso_class:       number | null
}

export const fetchParticleStatus = (siteId: string) =>
  apiFetch<ParticleStatus[]>(`/api/env/particles?site_id=${siteId}`)

// ── Settings: Sensors ─────────────────────────────────────────────────────────

export type DeviceType = 'ups' | 'generator' | 'crac' | 'chiller' | 'ats' | 'rack' | 'network_switch' | 'leak' | 'fire_zone' | 'custom'
export type Protocol   = 'mqtt' | 'modbus_tcp' | 'modbus_rtu' | 'snmp' | 'bacnet' | 'http'

export type SensorDevice = {
  id:               number
  site_id:          string
  device_id:        string
  name:             string
  device_type:      DeviceType
  room_id:          string | null
  rack_id:          string | null
  protocol:         Protocol
  protocol_config:  Record<string, unknown>
  enabled:          boolean
  created_at:       string
  updated_at:       string
  recent_readings?: { sensor_type: string; value: number; unit: string; recorded_at: string }[]
}

export type SensorCreate = {
  device_id:       string
  name:            string
  device_type:     DeviceType
  room_id?:        string | null
  rack_id?:        string | null
  protocol:        Protocol
  protocol_config: Record<string, unknown>
  enabled:         boolean
}

export type SensorUpdate = Partial<Omit<SensorCreate, 'device_id'>>

export const fetchSensors = (siteId: string, params?: { device_type?: string; room_id?: string; protocol?: string }) => {
  const p: Record<string, string> = { site_id: siteId }
  if (params?.device_type) p.device_type = params.device_type
  if (params?.room_id) p.room_id = params.room_id
  if (params?.protocol) p.protocol = params.protocol
  return apiFetch<SensorDevice[]>(`/api/settings/sensors?${new URLSearchParams(p)}`)
}

export const fetchSensor = (id: number) =>
  apiFetch<SensorDevice>(`/api/settings/sensors/${id}`)

export const createSensor = (siteId: string, body: SensorCreate) =>
  apiFetch<SensorDevice>(`/api/settings/sensors?site_id=${siteId}`, {
    method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body),
  })

export const updateSensor = (id: number, body: SensorUpdate) =>
  apiFetch<SensorDevice>(`/api/settings/sensors/${id}`, {
    method: 'PUT', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body),
  })

export const deleteSensor = (id: number) =>
  apiFetch<void>(`/api/settings/sensors/${id}`, { method: 'DELETE' })

// ── Settings: Thresholds ───────────────────────────────────────────────────────

export type AlarmThreshold = {
  id:               number
  site_id:          string
  sensor_type:      string
  threshold_value:  number
  direction:        'above' | 'below'
  severity:         'warning' | 'critical'
  message_template: string
  enabled:          boolean
  locked:           boolean
  created_at:       string
  updated_at:       string
}

export type ThresholdUpdate = { threshold_value?: number; severity?: string; enabled?: boolean }
export type ThresholdCreate = { sensor_type: string; threshold_value: number; direction: string; severity: string; message_template: string }

export const fetchThresholds = (siteId: string) =>
  apiFetch<AlarmThreshold[]>(`/api/settings/thresholds?site_id=${siteId}`)

export const updateThreshold = (id: number, body: ThresholdUpdate) =>
  apiFetch<AlarmThreshold>(`/api/settings/thresholds/${id}`, {
    method: 'PUT', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body),
  })

export const createThreshold = (siteId: string, body: ThresholdCreate) =>
  apiFetch<AlarmThreshold>(`/api/settings/thresholds?site_id=${siteId}`, {
    method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body),
  })

export const deleteThreshold = (id: number) =>
  apiFetch<void>(`/api/settings/thresholds/${id}`, { method: 'DELETE' })

export const resetThresholds = (siteId: string) =>
  apiFetch<{ ok: boolean; count: number }>(`/api/settings/thresholds/reset?site_id=${siteId}`, { method: 'POST' })

// ── Settings: Site / Notifications / Integrations ─────────────────────────────

export type SiteSettings         = { name: string; timezone: string; description: string }
export type NotificationSettings = { critical_alarms: boolean; warning_alarms: boolean; generator_events: boolean; maintenance_reminders: boolean; webhook_url: string; email_recipients: string }
export type IntegrationSettings  = { mqtt_host: string; mqtt_port: number }
export type PagePrefs            = { default_time_range_hours: number; refresh_interval_seconds: number }

const _settingsPut = <T>(path: string, value: Partial<T>) =>
  apiFetch<T>(`/api/settings/${path}`, {
    method: 'PUT', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ value }),
  })

export const fetchSiteSettings   = (siteId: string) => apiFetch<SiteSettings>(`/api/settings/site?site_id=${siteId}`)
export const updateSiteSettings  = (siteId: string, v: Partial<SiteSettings>) => _settingsPut<SiteSettings>(`site?site_id=${siteId}`, v)
export const fetchNotifications  = (siteId: string) => apiFetch<NotificationSettings>(`/api/settings/notifications?site_id=${siteId}`)
export const updateNotifications = (siteId: string, v: Partial<NotificationSettings>) => _settingsPut<NotificationSettings>(`notifications?site_id=${siteId}`, v)
export const fetchIntegrations   = (siteId: string) => apiFetch<IntegrationSettings>(`/api/settings/integrations?site_id=${siteId}`)
export const updateIntegrations  = (siteId: string, v: Partial<IntegrationSettings>) => _settingsPut<IntegrationSettings>(`integrations?site_id=${siteId}`, v)
export const fetchPagePrefs      = (siteId: string) => apiFetch<PagePrefs>(`/api/settings/page-prefs?site_id=${siteId}`)
export const updatePagePrefs     = (siteId: string, v: Partial<PagePrefs>) => _settingsPut<PagePrefs>(`page-prefs?site_id=${siteId}`, v)

// ── Scenarios (simulator control) ─────────────────────────────────

export type ScenarioInfo = {
  name:            string
  label:           string
  description:     string
  duration:        string
  compound:        boolean
  default_target:  string | null
  targets:         string[]
}

export const fetchScenarios = () =>
  apiFetch<ScenarioInfo[]>("/api/scenarios")

export const triggerScenario = (scenario: string, target?: string) =>
  apiFetch<{ ok: boolean }>("/api/scenarios/trigger", {
    method:  "POST",
    headers: { "Content-Type": "application/json" },
    body:    JSON.stringify({ scenario, target: target ?? null }),
  })