import Elementary
import ElementaryHTMX
import SharedModels

struct VendorForm: HTML, Sendable {

  let context: Context
  var vendor: Vendor? { context.vendor }

  init(
    _ context: Context
  ) {
    self.context = context
  }

  init() { self.init(.float(nil)) }

  enum Context: Sendable {
    case float(Vendor? = nil, shouldShow: Bool = false)
    case formOnly(Vendor)

    var vendor: Vendor? {
      switch self {
      case let .float(vendor, _): return vendor
      case let .formOnly(vendor): return vendor
      }
    }
  }

  var content: some HTML {
    switch context {
    case let .float(vendor, shouldDisplay):
      Float(shouldDisplay: shouldDisplay) {
        makeForm(vendor: vendor)
      }
    case let .formOnly(vendor):
      makeForm(vendor: vendor)
    }
  }

  func makeForm(vendor: Vendor?) -> some HTML {
    form(
      .id(.vendor(.form)),
      vendor != nil ? .hx.put(route: targetURL) : .hx.post(route: targetURL),
      .hx.target("#content"),
      .hx.swap(.outerHTML)
    ) {
      div(.class("row")) {
        input(
          .type(.text),
          .class("col-9"),
          .id("vendor-name"),
          .name("name"),
          .value(vendor?.name ?? ""),
          .placeholder("Vendor Name"),
          vendor != nil ? .hx.put(route: targetURL) : .hx.post(route: targetURL),
          .hx.trigger(.event(.keyup).changed().delay("500ms")),
          .required
        )
        if let vendor {
          button(
            .class("danger"),
            .style("font-size: 1.25em; padding: 10px 20px; border-radius: 10px;"),
            .hx.delete(route: .vendor(.delete(id: vendor.id))),
            .hx.confirm("Are you sure you want to delete this vendor?"),
            .hx.target(.id(.vendor(.row(id: vendor.id)))),
            .hx.swap(.outerHTML.transition(true).swap("1s")),
            .custom(
              name: "hx-on::after-request",
              value: "if(event.detail.successful) toggleContent('float'); window.location.href='/vendors';"
            )
          ) { "Delete" }
        }
        button(
          .type(.submit),
          .class("btn-primary"),
          .style("float: right")
        ) { buttonLabel }
      }
    }
  }

  private var buttonLabel: String {
    guard vendor != nil else { return "Create" }
    return "Update"
  }

  var targetURL: SiteRoute.View {
    guard let vendor else { return .vendor(.index) }
    return .vendor(.get(id: vendor.id))
  }
}