const BASE_URL = 'https://www.flightics.com/api/v1'
const USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36'

const HEADERS = {
  'Content-Type': 'application/json; charset=utf-8',
  'User-Agent': USER_AGENT,
  'sec-ch-ua': '"Chromium";v="147", "Not.A/Brand";v="8"',
  'sec-ch-ua-mobile': '?0',
  'sec-ch-ua-platform': '"macOS"',
  'Referer': 'https://www.flightics.com/'
}

// --- Types ---

export interface PassengersCount {
  adult: number
  child: number
  infant: number
}

export interface StopConfig {
  locations: string[]
  stayRange: { min: number, max: number }
  stayDateRange: { begin: string, end: string }
  continueFromAny: boolean
}

export interface SearchParams {
  departures: string[]
  local: string
  departureDateInterval: { begin: string, end: string }
  stops: StopConfig[]
  endInSameLocation: boolean
  maxStops: number | null
  fixStopsOrder: boolean
  stopLength: { min: number, max: number, isSet: boolean }
  maxResults: number
  passengersCount: PassengersCount
}

export interface Company {
  name: string | null
  code: string
  icao: string
}

export interface Segment {
  id: string
  departureCode: string
  departureCity: string
  departureDate: string
  departureTimestamp: number
  departureDateUtc: string
  departureUtcTimestamp: number
  arrivalCode: string
  arrivalCity: string
  arrivalDate: string
  arrivalTimestamp: number
  arrivalDateUtc: string
  arrivalUtcTimestamp: number
  number: number
  company: Company
  isHidden: boolean
}

export interface Leg {
  segments: Segment[]
}

export interface Trip {
  legs: Leg[]
  totalCost: number
  bookingToken: string
  currency: string
  deepLink: string | null
}

export interface SearchResponse {
  trips: Trip[]
  notComplete: boolean
  contractVersion: number
  responseId: string
}

export interface DetailResponse {
  trip: Trip
}

export interface Country {
  isoCode2: string
  isoCode3: string
  nameEng: string
  nameNative: string
  phonePreselection: string
}

export interface InspirationItem {
  from: string
  to: string[]
  minPrice: number
  minStops: number
}

export interface InspirationsResponse {
  items: InspirationItem[]
}

// --- API: Search ---

export async function searchTrips(params: SearchParams): Promise<SearchResponse> {
  return $fetch(`${BASE_URL}/trips/search`, {
    method: 'POST',
    headers: HEADERS,
    body: params
  })
}

/**
 * Poll search until notComplete is false or maxPolls reached.
 * The API returns partial results with notComplete: true.
 * Re-calling with the same params fetches more results.
 */
export async function searchTripsComplete(params: SearchParams, maxPolls: number = 3): Promise<SearchResponse> {
  let allTrips: Trip[] = []
  let lastResponse: SearchResponse | null = null

  for (let i = 0; i < maxPolls; i++) {
    const res = await searchTrips(params)
    allTrips = [...allTrips, ...res.trips]
    lastResponse = res
    if (!res.notComplete) break
    // Small delay between polls
    await new Promise(r => setTimeout(r, 500))
  }

  return {
    trips: allTrips,
    notComplete: lastResponse?.notComplete ?? false,
    contractVersion: lastResponse?.contractVersion ?? 0,
    responseId: lastResponse?.responseId ?? ''
  }
}

// --- API: Trip Detail & Check ---

export async function getTripDetail(bookingToken: string, local: string, passengersCount: PassengersCount): Promise<DetailResponse> {
  return $fetch(`${BASE_URL}/trip/detail`, {
    method: 'POST',
    headers: HEADERS,
    body: { bookingToken, local, passengersCount }
  })
}

export async function checkTrip(bookingToken: string, local: string, passengersCount: PassengersCount): Promise<DetailResponse> {
  return $fetch(`${BASE_URL}/trip/check`, {
    method: 'POST',
    headers: HEADERS,
    body: { bookingToken, local, passengersCount }
  })
}

// --- API: Inspirations ---

export async function getInspirations(from: string, take: number = 100, locale: string = 'en'): Promise<InspirationsResponse> {
  return $fetch(`${BASE_URL}/inspirations/search`, {
    method: 'GET',
    headers: { 'User-Agent': USER_AGENT },
    query: { from, take, locale }
  })
}

// --- API: Weekend Search ---

export async function searchWeekendTrips(params: SearchParams): Promise<SearchResponse> {
  return $fetch(`${BASE_URL}/trips/weekend/search`, {
    method: 'POST',
    headers: HEADERS,
    body: params
  })
}

// --- API: Route Flights ---

export interface RouteFlightsResponse {
  contractVersion: number
  returnResults: {
    trips: Trip[]
  }[]
}

export async function getRouteFlights(from: string, to: string, locale: string = 'en', passengersCount?: PassengersCount): Promise<RouteFlightsResponse> {
  return $fetch(`${BASE_URL}/route-flights`, {
    method: 'POST',
    headers: HEADERS,
    body: { from, to, locale, passengersCount }
  })
}

// --- API: Multi-City Inspirations ---

export interface MultiCityInspirationItem {
  from: string
  stops: string[]
  minPrice: number
}

export interface MultiCityInspirationsResponse {
  currency: { name: string, code: string, symbol: string }
  items: MultiCityInspirationItem[]
}

export async function getMultiCityInspirations(startLocationsCodes: string[], locale: string = 'en', take: number = 20): Promise<MultiCityInspirationsResponse> {
  return $fetch(`${BASE_URL}/inspirations/search-multi-city`, {
    method: 'POST',
    headers: HEADERS,
    body: { startLocationsCodes, locale, take }
  })
}

// --- API: Locations ---

export interface Airport {
  id: string
  iata: string
  icao: string
  nameEng: string
  lat: number
  lon: number
  cityId: string
  timeZone: string
  timeZoneOffset: string
}

export interface City {
  id: string
  name: string
  nameEng: string
  countryId: string
  lat: number
  lon: number
}

export interface LocationCountry {
  id: string
  name: string
  nameEng: string
  isoCode2: string
}

export interface LocationsResponse {
  contractVersion: number
  locale: string
  airports: Airport[]
  cities: City[]
  countries: LocationCountry[]
}

export async function getLocations(): Promise<LocationsResponse> {
  return $fetch(`${BASE_URL}/locations`, {
    method: 'GET',
    headers: { 'User-Agent': USER_AGENT }
  })
}

// --- API: Route Data ---

export async function getRouteData(departureCode: string, arrivalCode: string): Promise<any> {
  return $fetch(`${BASE_URL}/route-data`, {
    method: 'GET',
    headers: { 'User-Agent': USER_AGENT },
    query: { departureCode, arrivalCode }
  })
}

// --- API: Countries ---

export async function getCountries(): Promise<{ countries: Country[] }> {
  return $fetch(`${BASE_URL}/countries`, {
    method: 'GET',
    headers: { 'User-Agent': USER_AGENT }
  })
}

// --- API: Booking ---

export async function getBookingInfo(bookingToken: string, passengersCount: PassengersCount): Promise<any> {
  return $fetch(`${BASE_URL}/booking/info`, {
    method: 'POST',
    headers: HEADERS,
    body: { bookingToken, passengersCount }
  })
}

export async function initBooking(bookingToken: string, passengersCount: PassengersCount): Promise<any> {
  return $fetch(`${BASE_URL}/booking/init`, {
    method: 'POST',
    headers: HEADERS,
    body: { bookingToken, passengersCount }
  })
}