interface LoginCredentials {
  username: string
  password: string
}

interface RegisterData {
  username: string
  email?: string
  password: string
  password_repeat: string
}

interface AuthResponse {
  access_token: string
  user_id: string
  username?: string
  email?: string
}

interface Wallet {
  id: string
  user: string
  name: string
  adminkey: string
  inkey: string
  deleted: boolean
  created_at: string
  updated_at: string
  currency?: string
  balance_msat: number
  extra?: {
    icon: string
    color: string
    pinned: boolean
  }
}

interface User {
  id: string
  username?: string
  email?: string
  pubkey?: string
  external_id?: string
  extensions: string[]
  wallets: Wallet[]
  admin: boolean
  super_user: boolean
  fiat_providers: string[]
  has_password: boolean
  created_at: string
  updated_at: string
  extra?: {
    email_verified?: boolean
    first_name?: string
    last_name?: string
    display_name?: string
    picture?: string
    provider?: string
    visible_wallet_count?: number
  }
}

import { getApiUrl, getAuthToken, setAuthToken, removeAuthToken } from '@/lib/config/lnbits'

class LnbitsAPI {
  private accessToken: string | null = null

  constructor() {
    // Try to load token from localStorage
    this.accessToken = getAuthToken()
  }

  private async request<T>(
    endpoint: string,
    options: RequestInit = {}
  ): Promise<T> {
    const url = getApiUrl(endpoint)
    const headers: HeadersInit = {
      'Content-Type': 'application/json',
      ...options.headers,
    }

    if (this.accessToken) {
      (headers as Record<string, string>)['Authorization'] = `Bearer ${this.accessToken}`
    }

    // Debug logging
    console.log('LNBits API Request:', {
      url,
      method: options.method || 'GET',
      headers: headers,
      hasAccessToken: !!this.accessToken,
      endpoint
    })

    const response = await fetch(url, {
      ...options,
      headers,
    })

    console.log('LNBits API Response:', {
      status: response.status,
      statusText: response.statusText,
      ok: response.ok,
      url: response.url
    })

    if (!response.ok) {
      const errorText = await response.text()
      console.error('LNBits API Error:', {
        status: response.status,
        statusText: response.statusText,
        errorText
      })
      throw new Error(`API request failed: ${response.status} ${response.statusText}`)
    }

    const data = await response.json()
    console.log('LNBits API Response Data:', data)
    return data
  }

  async login(credentials: LoginCredentials): Promise<AuthResponse> {
    const response = await this.request<AuthResponse>('/auth', {
      method: 'POST',
      body: JSON.stringify(credentials),
    })

    this.accessToken = response.access_token
    setAuthToken(response.access_token)
    
    return response
  }

  async register(data: RegisterData): Promise<AuthResponse> {
    const response = await this.request<AuthResponse>('/auth/register', {
      method: 'POST',
      body: JSON.stringify(data),
    })

    this.accessToken = response.access_token
    setAuthToken(response.access_token)
    
    return response
  }

  async logout(): Promise<void> {
    // Just clear local state - no API call needed for logout
    this.accessToken = null
    removeAuthToken()
  }

  async getCurrentUser(): Promise<User> {
    console.log('getCurrentUser called, accessToken:', this.accessToken ? 'present' : 'missing')
    const user = await this.request<User>('/user')
    console.log('getCurrentUser response:', user)
    return user
  }

  async updatePassword(currentPassword: string, newPassword: string): Promise<User> {
    return this.request<User>('/auth/password', {
      method: 'PUT',
      body: JSON.stringify({
        current_password: currentPassword,
        new_password: newPassword,
      }),
    })
  }

  async updateProfile(data: Partial<User>): Promise<User> {
    return this.request<User>('/auth/update', {
      method: 'PUT',
      body: JSON.stringify(data),
    })
  }

  isAuthenticated(): boolean {
    return !!this.accessToken
  }

  getAccessToken(): string | null {
    return this.accessToken
  }
}

export const lnbitsAPI = new LnbitsAPI()
export type { LoginCredentials, RegisterData, AuthResponse, User }