import { Controller } from "@hotwired/stimulus"

export default class extends Controller {
  static targets = ["quantity", "cartCount", "cartTotal", "checkoutButton"]
  static values = { eventId: String }

  connect() {
    this.cart = {}
    this.updateCartDisplay()
    
    // Check for pending cart in session storage (after login)
    this.checkForPendingCart()
  }

  increaseQuantity(event) {
    const ticketTypeId = event.params.ticketTypeId
    const max = parseInt(event.params.max)
    const input = this.quantityTargetFor(ticketTypeId)

    const current = parseInt(input.value) || 0
    if (current < max) {
      input.value = current + 1
      this.updateCartItem(ticketTypeId, input)
    }
  }

  decreaseQuantity(event) {
    const ticketTypeId = event.params.ticketTypeId
    const input = this.quantityTargetFor(ticketTypeId)

    const current = parseInt(input.value) || 0
    if (current > 0) {
      input.value = current - 1
      this.updateCartItem(ticketTypeId, input)
    }
  }

  updateQuantityFromInput(event) {
    const input = event.target
    const ticketTypeId = input.dataset.ticketTypeId
    const max = parseInt(input.max)
    const quantity = parseInt(input.value) || 0

    // Validate input
    if (quantity < 0) {
      input.value = 0
    } else if (quantity > max) {
      input.value = max
    }

    this.updateCartItem(ticketTypeId, input)
  }

  updateCartItem(ticketTypeId, input) {
    const name = input.dataset.name
    const price = parseInt(input.dataset.price)
    const quantity = parseInt(input.value) || 0

    if (quantity > 0) {
      this.cart[ticketTypeId] = {
        name: name,
        price: price,
        quantity: quantity
      }
    } else {
      delete this.cart[ticketTypeId]
    }

    this.updateCartDisplay()
  }

  updateCartDisplay() {
    let totalTickets = 0
    let totalPrice = 0

    for (let ticketTypeId in this.cart) {
      totalTickets += this.cart[ticketTypeId].quantity
      totalPrice += (this.cart[ticketTypeId].price * this.cart[ticketTypeId].quantity) / 100
    }

    // Update cart count and total
    if (this.hasCartCountTarget) {
      this.cartCountTarget.textContent = totalTickets
    }
    
    if (this.hasCartTotalTarget) {
      this.cartTotalTarget.textContent = totalPrice.toFixed(2)
    }

    // Update checkout button state
    if (this.hasCheckoutButtonTarget) {
      const checkoutBtn = this.checkoutButtonTarget
      if (totalTickets > 0) {
        checkoutBtn.disabled = false
        checkoutBtn.classList.remove('opacity-50', 'cursor-not-allowed')
      } else {
        checkoutBtn.disabled = true
        checkoutBtn.classList.add('opacity-50', 'cursor-not-allowed')
      }
    }
  }

  proceedToCheckout() {
    if (Object.keys(this.cart).length === 0) {
      alert('Veuillez sélectionner au moins un billet')
      return
    }

    // Check if user is authenticated
    const isAuthenticated = document.body.dataset.userAuthenticated === "true"
    
    if (!isAuthenticated) {
      if (confirm('Vous devez être connecté pour acheter des billets. Souhaitez-vous vous connecter maintenant ?')) {
        // Store cart in session storage
        sessionStorage.setItem('pending_cart', JSON.stringify({
          eventId: this.eventIdValue,
          cart: this.cart
        }))
        window.location.href = '/auth/sign_in'
      }
      return
    }

    // Create form and submit to checkout
    const form = document.createElement('form')
    form.method = 'POST'
    form.action = `/events/${document.body.dataset.eventSlug}.${this.eventIdValue}/checkout`
    
    // Add CSRF token
    const csrfToken = document.querySelector('meta[name="csrf-token"]').content
    const csrfInput = document.createElement('input')
    csrfInput.type = 'hidden'
    csrfInput.name = 'authenticity_token'
    csrfInput.value = csrfToken
    form.appendChild(csrfInput)

    // Add cart data
    const cartInput = document.createElement('input')
    cartInput.type = 'hidden'
    cartInput.name = 'cart'
    cartInput.value = JSON.stringify(this.cart)
    form.appendChild(cartInput)

    document.body.appendChild(form)
    form.submit()
  }

  checkForPendingCart() {
    const pendingCart = sessionStorage.getItem('pending_cart')
    if (pendingCart) {
      try {
        const cartData = JSON.parse(pendingCart)
        if (cartData.eventId == this.eventIdValue) {
          this.cart = cartData.cart
          this.updateCartDisplay()
          
          // Restore quantities in inputs
          for (let ticketTypeId in this.cart) {
            const input = this.quantityTargetFor(ticketTypeId)
            if (input) {
              input.value = this.cart[ticketTypeId].quantity
            }
          }
        }
        sessionStorage.removeItem('pending_cart')
      } catch (e) {
        console.error('Error restoring pending cart:', e)
        sessionStorage.removeItem('pending_cart')
      }
    }
  }

  // Helper method to find quantity input by ticket type ID
  quantityTargetFor(ticketTypeId) {
    return document.querySelector(`#quantity_${ticketTypeId}`)
  }
}