import axios, { type AxiosInstance } from 'axios'

import type { FullStatusResponse } from '../types/fullStatus'
import type { Notification } from '../types/dashboard'
import type { CurrentPlanResponse, RunPlanResponse } from '../types/plan'

const client: AxiosInstance = axios.create({
  baseURL: '/api/v1',
  headers: { Accept: 'application/json' },
  timeout: 30_000,
})

/** Příklad: health / readiness až budou v FastAPI exponované. */
export async function getBackendHealth(): Promise<unknown> {
  const { data } = await client.get('/health')
  return data
}

export type HealthDetailedResponse = {
  db: 'ok' | 'error'
  scheduler: 'running' | 'stopped'
  telemetry_loop: 'running' | 'stopped'
  last_telemetry_age_sec: number
  last_plan_age_sec: number
  active_jobs: { id: string; next_run_time: string | null }[]
}

export async function getBackendHealthDetailed(): Promise<HealthDetailedResponse> {
  const { data } = await client.get<HealthDetailedResponse>('/health/detailed')
  return data
}

export async function getSiteStatusFull(siteId: number): Promise<FullStatusResponse> {
  const { data } = await client.get<FullStatusResponse>(`/sites/${siteId}/status/full`)
  return data
}

export type SiteNotificationsResponse = {
  notifications: Notification[]
}

export async function getSiteNotifications(siteId: number): Promise<SiteNotificationsResponse> {
  const { data } = await client.get<SiteNotificationsResponse>(`/sites/${siteId}/notifications`, {
    timeout: 30_000,
  })
  return {
    notifications: Array.isArray(data?.notifications) ? data.notifications : [],
  }
}

export type SetSiteModePayload = {
  mode: string
  notes: string | null
  valid_until: string | null
}

export type SetSiteModeResponse = {
  success: boolean
  mode: string
  activated_at: string
}

export async function postSiteMode(
  siteId: number,
  payload: SetSiteModePayload,
): Promise<SetSiteModeResponse> {
  const { data } = await client.post<SetSiteModeResponse>(`/sites/${siteId}/mode`, payload)
  return data
}

export async function getCurrentPlan(siteId: number): Promise<CurrentPlanResponse> {
  const { data } = await client.get<CurrentPlanResponse>(`/sites/${siteId}/plan/current`, {
    timeout: 60_000,
  })
  return data
}

/** GET /api/v1/sites/{id}/prices?date=YYYY-MM-DD */
export type SiteEffectivePriceRowDto = {
  site_id: number
  interval_start: string
  interval_end?: string
  effective_buy_price_czk_kwh?: number | string | null
  effective_sell_price_czk_kwh?: number | string | null
}

export async function getSitePrices(siteId: number, date: string): Promise<SiteEffectivePriceRowDto[]> {
  const { data } = await client.get<SiteEffectivePriceRowDto[]>(`/sites/${siteId}/prices`, {
    params: { date },
    timeout: 60_000,
  })
  return Array.isArray(data) ? data : []
}

export type ForecastPvIntervalRow = {
  interval_start: string
  power_w?: number | string | null
  pv_array_id?: number
}

export type ForecastPvDayResponse = {
  pv_a: ForecastPvIntervalRow[]
  pv_b: ForecastPvIntervalRow[]
}

export async function getSiteForecastPv(siteId: number, date: string): Promise<ForecastPvDayResponse> {
  const { data } = await client.get<ForecastPvDayResponse>(`/sites/${siteId}/forecast/pv`, {
    params: { date },
    timeout: 60_000,
  })
  return {
    pv_a: Array.isArray(data?.pv_a) ? data.pv_a : [],
    pv_b: Array.isArray(data?.pv_b) ? data.pv_b : [],
  }
}

export type NegPricePredictionDto = {
  predicted_date: string
  window_start_hour: number
  window_end_hour: number
  probability_pct: number
  expected_min_price: number | null
  reason: string
}

export type NegativePredictionsResponseDto = {
  predictions: NegPricePredictionDto[]
  insufficient_history: boolean
}

export async function getNegativePricePredictions(
  siteId: number,
): Promise<NegativePredictionsResponseDto> {
  const { data } = await client.get<NegativePredictionsResponseDto>(
    `/sites/${siteId}/prices/negative-predictions`,
    { timeout: 30_000 },
  )
  return {
    predictions: Array.isArray(data?.predictions) ? data.predictions : [],
    insufficient_history: Boolean(data?.insufficient_history),
  }
}

export async function postRunPlan(
  siteId: number,
  planType: 'daily' | 'rolling',
): Promise<RunPlanResponse> {
  const { data } = await client.post<RunPlanResponse>(
    `/sites/${siteId}/plan/run`,
    null,
    { params: { type: planType }, timeout: 120_000 },
  )
  return data
}

export type PricesImportResponse = {
  slots_imported: number
  date: string
  first_price_czk_kwh: number
}

export async function postImportSitePrices(
  siteId: number,
  date?: string,
): Promise<PricesImportResponse> {
  const { data } = await client.post<PricesImportResponse>(
    `/sites/${siteId}/prices/import`,
    null,
    {
      params: date ? { date } : undefined,
      timeout: 60_000,
    },
  )
  return data
}

export type ForecastRunResponse = {
  intervals_saved: number
  pv_arrays: number
}

export async function postRunForecast(siteId: number): Promise<ForecastRunResponse> {
  const { data } = await client.post<ForecastRunResponse>(
    `/sites/${siteId}/forecast/run`,
    null,
    { timeout: 120_000 },
  )
  return data
}

/** Aktivní EV session (GET .../ev/sessions/active) – join vozidlo + nabíječka */
export type ActiveEvSessionRow = {
  id: number
  charger_id: number
  vehicle_id: number | null
  session_start: string
  energy_delivered_wh: number
  target_soc_pct: number | null
  target_deadline: string | null
  make: string | null
  model: string | null
  battery_capacity_kwh: number | null
  default_target_soc_pct: number | null
  default_deadline_hour: number | null
  charger_code: string
  charger_name: string | null
}

export async function getActiveEvSessions(siteId: number): Promise<ActiveEvSessionRow[]> {
  const { data } = await client.get<ActiveEvSessionRow[]>(
    `/sites/${siteId}/ev/sessions/active`,
  )
  return data
}

export type PatchEvSessionPayload = {
  target_soc_pct: number | null
  target_deadline: string | null
}

export type PatchEvSessionResponse = {
  success: boolean
  session_id: number
}

export async function patchEvSession(
  siteId: number,
  sessionId: number,
  payload: PatchEvSessionPayload,
): Promise<PatchEvSessionResponse> {
  const { data } = await client.patch<PatchEvSessionResponse>(
    `/sites/${siteId}/ev/sessions/${sessionId}`,
    payload,
  )
  return data
}

/** Živé hodnoty registrů Deye (GET …/control/registers). */
export type DeyeRegistersLive = {
  reg108_charge_a: number
  reg109_discharge_a: number
  reg141_energy_mode: number
  reg142_limit_control: number
  reg143_export_limit_w: number
  reg178_peak_shaving_switch: number
  reg191_peak_shaving_w: number
  read_at: string
}

export async function getDeyeRegisters(siteId: number): Promise<DeyeRegistersLive> {
  const { data } = await client.get<DeyeRegistersLive>(`/sites/${siteId}/control/registers`, {
    timeout: 15_000,
  })
  return data
}

export type ModbusJournalCommandDto = {
  id: number
  register: number
  register_name: string | null
  value_to_write: number
  value_written: number | null
  value_verified: number | null
  status: string
  attempt_count: number
  created_at: string
}

export type ModbusJournalResponse = {
  commands: ModbusJournalCommandDto[]
}

export async function getCommandJournal(
  siteId: number,
  limit = 50,
): Promise<ModbusJournalResponse> {
  const { data } = await client.get<ModbusJournalResponse>(
    `/sites/${siteId}/control/journal`,
    { params: { limit }, timeout: 15_000 },
  )
  return {
    commands: Array.isArray(data?.commands) ? data.commands : [],
  }
}

export { client as backendClient }