import { LitElement, html } from "lit";
import { customElement, query, state } from "lit/decorators.js";
import Countries from "./data/countries.json";

@customElement("flag-input-modal")
export class FlagInputModal extends LitElement {
  @query("o-modal") private modalEl!: HTMLElement & {
    open: () => void;
    close: () => void;
  };

  @state() private search = "";
  @state() private isModalOpen = false;

  createRenderRoot() {
    return this;
  }

  render() {
    return html`
      <o-modal title="Flag Selector Modal" alwaysMaximized>
        <input
          class="h-[2rem] border-none text-center border border-gray-300 rounded-xl shadow-sm text-2xl text-center focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 text-black dark:border-gray-300/60 dark:bg-gray-700 dark:text-white"
          type="text"
          placeholder="Search..."
          @change=${this.handleSearch}
          @keyup=${this.handleSearch}
        />
        <div
          class="flex flex-wrap justify-evenly gap-[1rem] overflow-y-auto overflow-x-hidden h-[90%]"
        >
          ${this.isModalOpen
            ? Countries.filter(
                (country) =>
                  !country.restricted && this.includedInSearch(country),
              ).map(
                (country) => html`
                  <button
                    @click=${() => {
                      this.setFlag(country.code);
                      this.close();
                    }}
                    class="text-center cursor-pointer border-none bg-none opacity-70 
                  w-[calc(100%/2-15px)] sm:w-[calc(100%/4-15px)] 
                  md:w-[calc(100%/6-15px)] lg:w-[calc(100%/8-15px)] 
                  xl:w-[calc(100%/10-15px)] min-w-[80px]"
                  >
                    <img
                      class="country-flag w-full h-auto"
                      src="/flags/${country.code}.svg"
                      @error=${(e: Event) => {
                        const img = e.currentTarget as HTMLImageElement;
                        const fallback = "/flags/xx.svg";
                        if (img.src && !img.src.endsWith(fallback)) {
                          img.src = fallback;
                        }
                      }}
                    />
                    <span class="country-name">${country.name}</span>
                  </button>
                `,
              )
            : html``}
        </div>
      </o-modal>
    `;
  }

  private includedInSearch(country: { name: string; code: string }): boolean {
    return (
      country.name.toLowerCase().includes(this.search.toLowerCase()) ||
      country.code.toLowerCase().includes(this.search.toLowerCase())
    );
  }

  private handleSearch(event: Event) {
    this.search = (event.target as HTMLInputElement).value;
  }

  private setFlag(flag: string) {
    localStorage.setItem("flag", flag);
    this.dispatchEvent(
      new CustomEvent("flag-change", {
        detail: { flag },
        bubbles: true,
        composed: true,
      }),
    );
  }

  public open() {
    this.isModalOpen = true;
    this.modalEl?.open();
  }
  public close() {
    this.isModalOpen = false;
    this.modalEl?.close();
  }

  connectedCallback() {
    super.connectedCallback();
    window.addEventListener("keydown", this.handleKeyDown);
  }

  disconnectedCallback() {
    window.removeEventListener("keydown", this.handleKeyDown);
    super.disconnectedCallback();
  }

  private handleKeyDown = (e: KeyboardEvent) => {
    if (e.code === "Escape") {
      e.preventDefault();
      this.close();
    }
  };
}