import { mdiClose, mdiHelpCircleOutline } from "@mdi/js";
import deepFreeze from "deep-freeze";
import type { CSSResultGroup, PropertyValues } from "lit";
import { LitElement, css, html, nothing } from "lit";
import { customElement, property, query, state } from "lit/decorators";
import memoizeOne from "memoize-one";
import type { HASSDomEvent } from "../../../../common/dom/fire_event";
import { fireEvent } from "../../../../common/dom/fire_event";
import {
  fireRelatedContext,
  type RelatedContextItem,
} from "../../../../data/context";
import { computeRTLDirection } from "../../../../common/util/compute_rtl";
import { stripDefaults } from "../../../../common/util/strip-defaults";
import { withViewTransition } from "../../../../common/util/view-transition";
import "../../../../components/ha-button";
import "../../../../components/ha-dialog";
import "../../../../components/ha-dialog-footer";
import "../../../../components/ha-icon-button";
import "../../../../components/ha-spinner";
import type { LovelaceCardConfig } from "../../../../data/lovelace/config/card";
import type { LovelaceSectionConfig } from "../../../../data/lovelace/config/section";
import {
  getCustomCardEntry,
  isCustomType,
  stripCustomPrefix,
} from "../../../../data/lovelace_custom_cards";
import { showConfirmationDialog } from "../../../../dialogs/generic/show-dialog-box";
import type { HassDialog } from "../../../../dialogs/make-dialog-manager";
import { DirtyStateProviderMixin } from "../../../../mixins/dirty-state-provider-mixin";
import {
  haStyleDialog,
  haStyleDialogFixedTop,
  haStyleScrollbar,
} from "../../../../resources/styles";
import type { HomeAssistant } from "../../../../types";
import { showToast } from "../../../../util/toast";
import { showSaveSuccessToast } from "../../../../util/toast-saved-success";
import "../../cards/hui-card";
import { getConfigRelatedContext } from "../../common/get-config-related-context";
import "../../sections/hui-section";
import { getCardDefaultConfig } from "../get-card-default-config";
import { getCardDocumentationURL } from "../get-dashboard-documentation-url";
import type { ConfigChangedEvent } from "../hui-element-editor";
import type { GUIModeChangedEvent } from "../types";
import "./hui-card-element-editor";
import type { HuiCardElementEditor } from "./hui-card-element-editor";
import type { EditCardDialogParams } from "./show-edit-card-dialog";

declare global {
  // for fire event
  interface HASSDomEvents {
    "reload-lovelace": undefined;
  }
  // for add event listener
  interface HTMLElementEventMap {
    "reload-lovelace": HASSDomEvent<undefined>;
  }
}

@customElement("hui-dialog-edit-card")
export class HuiDialogEditCard
  extends DirtyStateProviderMixin<LovelaceCardConfig>()(LitElement)
  implements HassDialog<EditCardDialogParams>
{
  @property({ attribute: false }) public hass!: HomeAssistant;

  @property({ type: Boolean, reflect: true }) public large = false;

  @state() private _params?: EditCardDialogParams;

  @state() private _open = false;

  @state() private _cardConfig?: LovelaceCardConfig;

  @state() private _sectionConfig?: LovelaceSectionConfig;

  @state() private _saving = false;

  @state() private _error?: string;

  @state() private _guiModeAvailable? = true;

  @query("hui-card-element-editor")
  private _cardEditorEl?: HuiCardElementEditor;

  @state() private _GUImode = true;

  @state() private _documentationURL?: string;

  public async showDialog(params: EditCardDialogParams): Promise<void> {
    this._params = params;
    this._GUImode = true;
    this._guiModeAvailable = true;
    this._open = true;

    this._sectionConfig = this._params.sectionConfig;

    this._cardConfig = params.cardConfig;

    this.large = false;
    if (this._cardConfig && !Object.isFrozen(this._cardConfig)) {
      this._cardConfig = deepFreeze(this._cardConfig);
    }
    const effectiveDefaults = this._cardConfig?.type
      ? await getCardDefaultConfig(this._cardConfig.type)
      : undefined;
    const normalize = (config: LovelaceCardConfig) =>
      stripDefaults(config, effectiveDefaults);
    if (params.isNew && this._cardConfig) {
      this._initDirtyTracking({ type: "deep" }, { type: "" }, normalize);
      this._updateDirtyState(this._cardConfig);
    } else {
      this._initDirtyTracking({ type: "deep" }, this._cardConfig, normalize);
    }
  }

  public closeDialog(): boolean {
    if (this.isEffectiveDirtyState) {
      this._confirmCancel();
      return false;
    }
    this._open = false;
    return true;
  }

  private _dialogClosed(): void {
    this._open = false;
    this._params = undefined;
    this._cardConfig = undefined;
    this._error = undefined;
    this._documentationURL = undefined;
    this._updateRelatedContext(undefined);
    fireEvent(this, "dialog-closed", { dialog: this.localName });
  }

  protected updated(changedProps: PropertyValues): void {
    if (!this._cardConfig || !changedProps.has("_cardConfig")) {
      return;
    }

    const oldConfig = changedProps.get("_cardConfig") as LovelaceCardConfig;

    if (oldConfig?.type !== this._cardConfig!.type) {
      this._documentationURL = getCardDocumentationURL(
        this.hass,
        this._cardConfig!.type
      );
    }

    this._updateRelatedContext(getConfigRelatedContext(this._cardConfig));
  }

  private _relatedContext?: RelatedContextItem;

  private _updateRelatedContext(context: RelatedContextItem | undefined): void {
    if (
      context?.itemType === this._relatedContext?.itemType &&
      context?.itemId === this._relatedContext?.itemId
    ) {
      return;
    }
    this._relatedContext = context;
    fireRelatedContext(this, context);
  }

  protected render() {
    if (!this._params || !this._cardConfig) {
      return nothing;
    }

    let heading: string;
    if (this._cardConfig.type) {
      let cardName: string | undefined;
      if (isCustomType(this._cardConfig.type)) {
        // prettier-ignore
        cardName = getCustomCardEntry(
          stripCustomPrefix(this._cardConfig.type)
        )?.name;
        // Trim names that end in " Card" so as not to redundantly duplicate it
        if (cardName?.toLowerCase().endsWith(" card")) {
          cardName = cardName.substring(0, cardName.length - 5);
        }
      } else {
        cardName = this.hass!.localize(
          `ui.panel.lovelace.editor.card.${this._cardConfig.type}.name`
        );
      }
      heading = this.hass!.localize(
        "ui.panel.lovelace.editor.edit_card.typed_header",
        { type: cardName }
      );
    } else {
      heading = this.hass!.localize(
        "ui.panel.lovelace.editor.edit_card.header"
      );
    }

    return html`
      <ha-dialog
        .open=${this._open}
        .width=${this.large ? "full" : "large"}
        .preventScrimClose=${this.isEffectiveDirtyState}
        @keydown=${this._ignoreKeydown}
        @closed=${this._dialogClosed}
        @opened=${this._opened}
      >
        <ha-icon-button
          slot="headerNavigationIcon"
          @click=${this._cancel}
          .label=${this.hass.localize("ui.common.close")}
          .path=${mdiClose}
        ></ha-icon-button>
        <span
          slot="headerTitle"
          class="title-enlargeable"
          @click=${this._enlarge}
          >${heading}</span
        >
        ${this._documentationURL !== undefined
          ? html`
              <ha-icon-button
                .path=${mdiHelpCircleOutline}
                slot="headerActionItems"
                href=${this._documentationURL}
                title=${this.hass!.localize("ui.panel.lovelace.menu.help")}
                target="_blank"
                rel="noreferrer"
                dir=${computeRTLDirection(this.hass)}
              ></ha-icon-button>
            `
          : nothing}
        <div class="content">
          <div class="element-editor ha-scrollbar">
            <hui-card-element-editor
              autofocus
              .showVisibilityTab=${this._cardConfig.type !== "conditional"}
              .sectionConfig=${this._sectionConfig}
              .hass=${this.hass}
              .lovelace=${this._params.lovelaceConfig}
              .value=${this._cardConfig}
              in-dialog
              @config-changed=${this._handleConfigChanged}
              @GUImode-changed=${this._handleGUIModeChanged}
              @editor-save=${this._save}
            ></hui-card-element-editor>
          </div>
          <div class="element-preview ha-scrollbar">
            ${this._sectionConfig
              ? html`
                  <hui-section
                    .hass=${this.hass}
                    .config=${this._cardConfigInSection(this._cardConfig)}
                    preview
                    class=${this._error ? "blur" : ""}
                  ></hui-section>
                `
              : html`
                  <hui-card
                    .hass=${this.hass}
                    .config=${this._cardConfig}
                    preview
                    class=${this._error ? "blur" : ""}
                  ></hui-card>
                `}
            ${this._error
              ? html` <ha-spinner aria-label="Can't update card"></ha-spinner> `
              : ``}
          </div>
        </div>
        <ha-dialog-footer slot="footer">
          ${this._cardConfig !== undefined
            ? html`
                <ha-button
                  slot="secondaryAction"
                  @click=${this._toggleMode}
                  .disabled=${!this._guiModeAvailable}
                  class="gui-mode-button"
                  appearance="plain"
                >
                  ${this.hass!.localize(
                    !this._cardEditorEl || this._GUImode
                      ? "ui.panel.lovelace.editor.edit_card.show_code_editor"
                      : "ui.panel.lovelace.editor.edit_card.show_visual_editor"
                  )}
                </ha-button>
              `
            : ""}
          <ha-button
            appearance="plain"
            slot="secondaryAction"
            @click=${this._cancel}
          >
            ${this.hass!.localize("ui.common.cancel")}
          </ha-button>
          <ha-button
            slot="primaryAction"
            ?disabled=${!this._canSave || this._saving || !this.isDirtyState}
            @click=${this._save}
            .loading=${this._saving}
          >
            ${this.hass!.localize("ui.common.save")}
          </ha-button>
        </ha-dialog-footer>
      </ha-dialog>
    `;
  }

  private _enlarge() {
    withViewTransition(() => {
      this.large = !this.large;
    });
  }

  private _ignoreKeydown(ev: KeyboardEvent) {
    ev.stopPropagation();
  }

  private _handleConfigChanged(
    ev: HASSDomEvent<ConfigChangedEvent<LovelaceCardConfig>>
  ) {
    const config = deepFreeze(ev.detail.config);
    this._cardConfig = config;
    this._error = ev.detail.error;
    this._guiModeAvailable = ev.detail.guiModeAvailable;
    this._updateDirtyState(config);
  }

  private _handleGUIModeChanged(ev: HASSDomEvent<GUIModeChangedEvent>): void {
    ev.stopPropagation();
    this._GUImode = ev.detail.guiMode;
    this._guiModeAvailable = ev.detail.guiModeAvailable;
  }

  private _toggleMode(): void {
    withViewTransition(() => {
      this._cardEditorEl?.toggleMode();
    });
  }

  private _opened() {
    this._cardEditorEl?.focusYamlEditor();
  }

  private _cardConfigInSection = memoizeOne(
    (cardConfig: LovelaceCardConfig) => {
      const { cards, title, ...containerConfig } = this
        ._sectionConfig as LovelaceSectionConfig;

      return {
        ...containerConfig,
        cards: cardConfig ? [cardConfig] : [],
      };
    }
  );

  private get _canSave(): boolean {
    if (this._saving) {
      return false;
    }
    if (this._cardConfig === undefined) {
      return false;
    }
    if (this._cardEditorEl && this._cardEditorEl.hasError) {
      return false;
    }
    return true;
  }

  private async _confirmCancel() {
    // Make sure the open state of this dialog is handled before the open state of confirm dialog
    await new Promise((resolve) => {
      setTimeout(resolve, 0);
    });
    const confirm = await showConfirmationDialog(this, {
      title: this.hass!.localize(
        "ui.panel.lovelace.editor.edit_card.unsaved_changes"
      ),
      text: this.hass!.localize(
        "ui.panel.lovelace.editor.edit_card.confirm_cancel"
      ),
      dismissText: this.hass!.localize("ui.common.stay"),
      confirmText: this.hass!.localize("ui.common.leave"),
    });
    if (confirm) {
      this._cancel();
    }
  }

  private _cancel(ev?: Event) {
    if (ev) {
      ev.stopPropagation();
    }
    this._discardDirtyStateChanges();
    this.closeDialog();
  }

  private async _save(): Promise<void> {
    if (!this._canSave) {
      return;
    }
    if (!this.isDirtyState) {
      this.closeDialog();
      return;
    }
    this._saving = true;
    try {
      await this._params!.saveCardConfig(this._cardConfig!);
      this._saving = false;
      this._markDirtyStateClean();
      showSaveSuccessToast(this, this.hass);
      this.closeDialog();
    } catch (err: any) {
      showToast(this, {
        message: err.message,
      });
      this._saving = false;
    }
  }

  static get styles(): CSSResultGroup {
    return [
      haStyleDialog,
      haStyleDialogFixedTop,
      haStyleScrollbar,
      css`
        :host {
          --code-mirror-max-height: calc(100vh - 209px);
          /* 68px - header
             69px - footer
             24px - padding-top for #content
             40px - margin-top for mdc-dialog__surface
             8px - spacing under mdc-dialog__surface */
        }

        ha-dialog {
          --dialog-z-index: 6;
          --dialog-content-padding: var(--ha-space-2);
        }

        .content {
          width: 100%;
          max-width: 100%;
        }

        @media all and (max-width: 450px), all and (max-height: 500px) {
          /* overrule the ha-style-dialog max-height on small screens */
          .content {
            width: 100%;
            max-width: 100%;
            gap: var(--ha-space-3);
          }
        }

        @media all and (min-width: 451px) and (min-height: 501px) {
          :host([large]) .content {
            max-width: none;
          }
        }

        .center {
          margin-left: auto;
          margin-right: auto;
        }

        .content {
          display: flex;
          flex-direction: column;
        }

        .content hui-card {
          display: block;
          padding: 4px;
          margin: 0 auto;
          max-width: 390px;
        }
        .content hui-section {
          display: block;
          padding: 4px;
          margin: 0 auto;
          max-width: var(--ha-view-sections-column-max-width, 500px);
        }
        .content .element-editor {
          padding-inline-end: var(--ha-space-2);
          margin-inline-start: var(--ha-space-1);
          margin-bottom: 0;
        }

        @media (min-width: 1000px) {
          .content {
            flex-direction: row;
            max-height: var(--code-mirror-max-height);
          }
          .content > .element-editor {
            padding-inline-end: var(--ha-space-4);
          }
          .content > .element-editor,
          .content > .element-preview {
            flex-basis: 0;
            flex-grow: 1;
            flex-shrink: 1;
            min-width: 0;
            height: auto;
          }
          .content hui-card {
            padding: 8px 10px;
            margin: auto 0px;
            max-width: 500px;
          }
          .content hui-section {
            padding: 8px 10px;
            margin: auto 0px;
            max-width: var(--ha-view-sections-column-max-width, 500px);
          }
        }
        .hidden {
          display: none;
        }
        .element-editor {
          margin-bottom: 8px;
        }
        .blur {
          filter: blur(2px) grayscale(100%);
        }
        .element-preview {
          position: relative;
          height: max-content;
          background: var(--primary-background-color);
          padding: 4px;
          border-radius: var(--ha-border-radius-sm);
        }
        .element-preview ha-spinner {
          top: calc(50% - 24px);
          left: calc(50% - 24px);
          position: absolute;
          z-index: 10;
        }
        hui-card {
          padding-top: 8px;
          margin-bottom: 4px;
          display: block;
          width: 100%;
          box-sizing: border-box;
        }
        .gui-mode-button {
          margin-right: auto;
          margin-inline-end: auto;
          margin-inline-start: initial;
        }
        ha-dialog ha-icon-button[slot="headerActionItems"] {
          color: var(--secondary-text-color);
        }
        .title-enlargeable {
          display: block;
        }
      `,
    ];
  }
}

declare global {
  interface HTMLElementTagNameMap {
    "hui-dialog-edit-card": HuiDialogEditCard;
  }
}
