import {
  mdiArrowDown,
  mdiArrowUp,
  mdiClose,
  mdiFormatListChecks,
  mdiMenuDown,
  mdiSlopeUphill,
  mdiTableCog,
  mdiUnfoldLessHorizontal,
  mdiUnfoldMoreHorizontal,
} from "@mdi/js";

import "@home-assistant/webawesome/dist/components/divider/divider";
import type { HassEntity } from "home-assistant-js-websocket";
import { css, type CSSResultGroup, html, LitElement, 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 { computeStateName } from "../../../../common/entity/compute_state_name";
import type { LocalizeFunc } from "../../../../common/translations/localize";
import "../../../../components/chips/ha-assist-chip";
import "../../../../components/data-table/ha-data-table";
import type {
  DataTableColumnContainer,
  HaDataTable,
  SelectionChangedEvent,
  SortingDirection,
} from "../../../../components/data-table/ha-data-table";
import { showDataTableSettingsDialog } from "../../../../components/data-table/show-dialog-data-table-settings";
import "../../../../components/ha-button";
import "../../../../components/ha-dropdown";
import type { HaDropdownSelectEvent } from "../../../../components/ha-dropdown";
import "../../../../components/ha-dropdown-item";
import "../../../../components/input/ha-input-search";
import type { HaInputSearch } from "../../../../components/input/ha-input-search";
import type {
  StatisticsMetaData,
  StatisticsValidationResult,
} from "../../../../data/recorder";
import {
  clearStatistics,
  getStatisticIds,
  StatisticMeanType,
  updateStatisticsIssues,
  validateStatistics,
} from "../../../../data/recorder";
import { KeyboardShortcutMixin } from "../../../../mixins/keyboard-shortcut-mixin";
import { haStyle } from "../../../../resources/styles";
import type { HomeAssistant } from "../../../../types";
import { showConfirmationDialog } from "../../../lovelace/custom-card-helpers";
import { fixStatisticsIssue } from "./fix-statistics";
import { showStatisticsAdjustSumDialog } from "./show-dialog-statistics-adjust-sum";

const FIX_ISSUES_ORDER: Record<StatisticsValidationResult["type"], number> = {
  no_state: 0,
  entity_no_longer_recorded: 1,
  entity_not_recorded: 1,
  state_class_removed: 2,
  units_changed: 3,
  mean_type_changed: 4,
};

const FIXABLE_ISSUES: StatisticsValidationResult["type"][] = [
  "no_state",
  "entity_no_longer_recorded",
  "state_class_removed",
  "units_changed",
  "mean_type_changed",
];

type StatisticData = StatisticsMetaData & {
  issues?: StatisticsValidationResult[];
  state?: HassEntity;
  selectable?: boolean;
};

type DisplayedStatisticData = StatisticData & {
  displayName: string;
  issues_string?: string;
};

@customElement("developer-tools-statistics")
class HaPanelDevStatistics extends KeyboardShortcutMixin(LitElement) {
  @property({ attribute: false }) public hass!: HomeAssistant;

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

  @state() private _data: StatisticData[] = [] as StatisticsMetaData[];

  @state() private filter = "";

  @state() private _selected: string[] = [];

  @state() private groupOrder?: string[];

  @state() private columnOrder?: string[];

  @state() private hiddenColumns?: string[];

  @state() private _sortColumn?: string;

  @state() private _sortDirection: SortingDirection = null;

  @state() private _groupColumn?: string;

  @state() private _selectMode = false;

  @query("ha-data-table", true) private _dataTable!: HaDataTable;

  @query("ha-input-search") private _searchInput!: HaInputSearch;

  protected firstUpdated() {
    this._validateStatistics();
  }

  private _displayData = memoizeOne(
    (data: StatisticData[], localize: LocalizeFunc): DisplayedStatisticData[] =>
      data.map((item) => ({
        ...item,
        displayName: item.state
          ? computeStateName(item.state)
          : item.name || item.statistic_id,
        issues_string: item.issues
          ?.map(
            (issue) =>
              localize(
                `ui.panel.config.developer-tools.tabs.statistics.issues.${issue.type}`,
                issue.data
              ) || issue.type
          )
          .join(" "),
      }))
  );

  private _columns = memoizeOne(
    (
      localize: LocalizeFunc
    ): DataTableColumnContainer<DisplayedStatisticData> => ({
      displayName: {
        title: localize(
          "ui.panel.config.developer-tools.tabs.statistics.data_table.name"
        ),
        main: true,
        sortable: true,
        filterable: true,
        flex: 2,
      },
      statistic_id: {
        title: localize(
          "ui.panel.config.developer-tools.tabs.statistics.data_table.statistic_id"
        ),
        sortable: true,
        filterable: true,
        hidden: this.narrow,
      },
      statistics_unit_of_measurement: {
        title: localize(
          "ui.panel.config.developer-tools.tabs.statistics.data_table.statistics_unit"
        ),
        sortable: true,
        filterable: true,
        forceLTR: true,
      },
      source: {
        title: localize(
          "ui.panel.config.developer-tools.tabs.statistics.data_table.source"
        ),
        sortable: true,
        filterable: true,
        groupable: true,
      },
      issues_string: {
        title: localize(
          "ui.panel.config.developer-tools.tabs.statistics.data_table.issue"
        ),
        sortable: true,
        filterable: true,
        groupable: true,
        direction: "asc",
        flex: 2,
        template: (statistic) =>
          html`${statistic.issues_string ??
          localize(
            "ui.panel.config.developer-tools.tabs.statistics.no_issue"
          )}`,
      },
      fix: {
        title: "",
        label: this.hass.localize(
          "ui.panel.config.developer-tools.tabs.statistics.fix_issue.fix"
        ),
        type: "icon",
        template: (statistic) =>
          html`${statistic.issues
            ? html`<ha-button
                @click=${this._fixIssue}
                .data=${statistic.issues}
                appearance="plain"
                size="small"
              >
                ${localize(
                  statistic.issues.some((issue) =>
                    FIXABLE_ISSUES.includes(issue.type)
                  )
                    ? "ui.panel.config.developer-tools.tabs.statistics.fix_issue.fix"
                    : "ui.panel.config.developer-tools.tabs.statistics.fix_issue.info"
                )}
              </ha-button>`
            : "—"}`,
        minWidth: "113px",
        maxWidth: "113px",
        showNarrow: true,
      },
      actions: {
        title: "",
        label: localize(
          "ui.panel.config.developer-tools.tabs.statistics.adjust_sum"
        ),
        type: "icon-button",
        showNarrow: true,
        template: (statistic) =>
          statistic.has_sum
            ? html`
                <ha-icon-button
                  .label=${localize(
                    "ui.panel.config.developer-tools.tabs.statistics.adjust_sum"
                  )}
                  .path=${mdiSlopeUphill}
                  .statistic=${statistic}
                  @click=${this._showStatisticsAdjustSumDialog}
                ></ha-icon-button>
              `
            : "",
      },
    })
  );

  protected render() {
    const localize = this.hass.localize;
    const columns = this._columns(this.hass.localize);

    const selectModeBtn = !this._selectMode
      ? html`<ha-assist-chip
          class="has-dropdown select-mode-chip"
          .active=${this._selectMode}
          @click=${this._enableSelectMode}
          .title=${localize(
            "ui.components.subpage-data-table.enter_selection_mode"
          )}
        >
          <ha-svg-icon slot="icon" .path=${mdiFormatListChecks}></ha-svg-icon>
        </ha-assist-chip> `
      : nothing;

    const searchBar = html`<ha-input-search
      appearance="outlined"
      .value=${this.filter}
      @input=${this._handleSearchChange}
    >
    </ha-input-search>`;

    const sortByMenu = Object.values(columns).find((col) => col.sortable)
      ? html`
          <ha-dropdown @wa-select=${this._handleSortBy}>
            <ha-assist-chip
              slot="trigger"
              .label=${localize("ui.components.subpage-data-table.sort_by", {
                sortColumn: this._sortColumn
                  ? ` ${columns[this._sortColumn]?.title || columns[this._sortColumn]?.label}` ||
                    ""
                  : "",
              })}
            >
              <ha-svg-icon
                slot="trailing-icon"
                .path=${mdiMenuDown}
              ></ha-svg-icon>
            </ha-assist-chip>
            ${Object.entries(columns).map(([id, column]) =>
              column.sortable
                ? html`
                    <ha-dropdown-item
                      .value=${id}
                      .selected=${id === this._sortColumn}
                    >
                      ${this._sortColumn === id
                        ? html`
                            <ha-svg-icon
                              slot="details"
                              .path=${this._sortDirection === "desc"
                                ? mdiArrowDown
                                : mdiArrowUp}
                            ></ha-svg-icon>
                          `
                        : nothing}
                      ${column.title || column.label}
                    </ha-dropdown-item>
                  `
                : nothing
            )}
          </ha-dropdown>
        `
      : nothing;

    const groupByMenu = Object.values(columns).find((col) => col.groupable)
      ? html`
          <ha-dropdown @wa-select=${this._handleOverflowGroupBy}>
            <ha-assist-chip
              slot="trigger"
              .label=${localize("ui.components.subpage-data-table.group_by", {
                groupColumn: this._groupColumn
                  ? ` ${columns[this._groupColumn].title || columns[this._groupColumn].label}`
                  : "",
              })}
            >
              <ha-svg-icon
                slot="trailing-icon"
                .path=${mdiMenuDown}
              ></ha-svg-icon
            ></ha-assist-chip>
            ${Object.entries(columns).map(([id, column]) =>
              column.groupable
                ? html`
                    <ha-dropdown-item
                      .value=${id}
                      .selected=${id === this._groupColumn}
                    >
                      ${column.title || column.label}
                    </ha-dropdown-item>
                  `
                : nothing
            )}
            <ha-dropdown-item
              value="none"
              .selected=${this._groupColumn === undefined}
            >
              ${localize("ui.components.subpage-data-table.dont_group_by")}
            </ha-dropdown-item>
            <wa-divider></wa-divider>
            <ha-dropdown-item
              value="collapse_all"
              @click=${this._collapseAllGroups}
              .disabled=${this._groupColumn === undefined}
            >
              <ha-svg-icon
                slot="icon"
                .path=${mdiUnfoldLessHorizontal}
              ></ha-svg-icon>
              ${localize(
                "ui.components.subpage-data-table.collapse_all_groups"
              )}
            </ha-dropdown-item>
            <ha-dropdown-item
              @click=${this._expandAllGroups}
              .disabled=${this._groupColumn === undefined}
            >
              <ha-svg-icon
                slot="icon"
                .path=${mdiUnfoldMoreHorizontal}
              ></ha-svg-icon>
              ${localize("ui.components.subpage-data-table.expand_all_groups")}
            </ha-dropdown-item>
          </ha-dropdown>
        `
      : nothing;

    const settingsButton = html`<ha-assist-chip
      class="has-dropdown select-mode-chip"
      @click=${this._openSettings}
      .title=${localize("ui.components.subpage-data-table.settings")}
    >
      <ha-svg-icon slot="icon" .path=${mdiTableCog}></ha-svg-icon>
    </ha-assist-chip>`;

    return html`
      <div class="table-with-toolbars">
        ${this._selectMode
          ? html`<div class="selection-bar">
              <div class="selection-controls">
                <ha-icon-button
                  .path=${mdiClose}
                  @click=${this._disableSelectMode}
                  .label=${localize(
                    "ui.components.subpage-data-table.exit_selection_mode"
                  )}
                ></ha-icon-button>
                <ha-dropdown>
                  <ha-assist-chip
                    .label=${localize(
                      "ui.components.subpage-data-table.select"
                    )}
                    slot="trigger"
                  >
                    <ha-svg-icon
                      slot="icon"
                      .path=${mdiFormatListChecks}
                    ></ha-svg-icon>
                    <ha-svg-icon
                      slot="trailing-icon"
                      .path=${mdiMenuDown}
                    ></ha-svg-icon
                  ></ha-assist-chip>
                  <ha-dropdown-item @click=${this._selectAll}>
                    ${localize("ui.components.subpage-data-table.select_all")}
                  </ha-dropdown-item>
                  <ha-dropdown-item @click=${this._selectAllIssues}>
                    ${localize(
                      "ui.panel.config.developer-tools.tabs.statistics.data_table.select_all_issues"
                    )}
                  </ha-dropdown-item>
                  <ha-dropdown-item @click=${this._selectNone}>
                    ${localize("ui.components.subpage-data-table.select_none")}
                  </ha-dropdown-item>
                  <wa-divider></wa-divider>
                  <ha-dropdown-item @click=${this._disableSelectMode}>
                    ${localize(
                      "ui.components.subpage-data-table.exit_selection_mode"
                    )}
                  </ha-dropdown-item>
                </ha-dropdown>
                <p>
                  ${localize("ui.components.subpage-data-table.selected", {
                    selected: this._selected.length,
                  })}
                </p>
              </div>
              <div class="center-vertical">
                <slot name="selection-bar"></slot>
              </div>
              <ha-assist-chip
                .label=${localize(
                  "ui.panel.config.developer-tools.tabs.statistics.delete_selected"
                )}
                .disabled=${!this._selected.length}
                @click=${this._clearSelected}
              >
              </ha-assist-chip>
            </div>`
          : nothing}
        <div slot="toolbar-icon">
          <slot name="toolbar-icon"></slot>
        </div>
        ${this.narrow
          ? html`
              <div slot="header">
                <slot name="header">
                  <div class="search-toolbar">${searchBar}</div>
                </slot>
              </div>
            `
          : ""}
        <ha-data-table
          .narrow=${this.narrow}
          .columns=${columns}
          .data=${this._displayData(this._data, this.hass.localize)}
          .noDataText=${this.hass.localize(
            "ui.panel.config.developer-tools.tabs.statistics.data_table.no_statistics"
          )}
          .filter=${this.filter}
          .selectable=${this._selectMode}
          id="statistic_id"
          clickable
          .sortColumn=${this._sortColumn}
          .sortDirection=${this._sortDirection}
          .groupColumn=${this._groupColumn}
          .groupOrder=${this.groupOrder}
          .columnOrder=${this.columnOrder}
          .hiddenColumns=${this.hiddenColumns}
          @row-click=${this._rowClicked}
          @selection-changed=${this._handleSelectionChanged}
          @sorting-changed=${this._handleTableSortingChanged}
        >
          ${!this.narrow
            ? html`
                <div slot="header">
                  <slot name="header">
                    <div class="table-header">
                      ${selectModeBtn}${searchBar}${groupByMenu}${sortByMenu}${settingsButton}
                    </div>
                  </slot>
                </div>
              `
            : html`<div slot="header"></div>
                <div slot="header-row" class="narrow-header-row">
                  ${selectModeBtn}${groupByMenu}${sortByMenu}${settingsButton}
                </div>`}
        </ha-data-table>
      </div>
    `;
  }

  private _handleSearchChange(ev: InputEvent) {
    if (this.filter === (ev.target as HaInputSearch).value) {
      return;
    }
    this.filter = (ev.target as HaInputSearch).value ?? "";
  }

  private _handleSelectionChanged(
    ev: HASSDomEvent<SelectionChangedEvent>
  ): void {
    this._selected = ev.detail.value;
  }

  private _handleTableSortingChanged(
    ev: CustomEvent<{ column: string; direction: SortingDirection }>
  ) {
    const { column, direction } = ev.detail;
    this._sortColumn = column;
    this._sortDirection = direction;
  }

  private _handleSortBy(ev: HaDropdownSelectEvent) {
    ev.preventDefault(); // keep dropdown open
    const columnId = ev.detail.item.value;
    if (!this._sortDirection || this._sortColumn !== columnId) {
      this._sortDirection = "asc";
    } else if (this._sortDirection === "asc") {
      this._sortDirection = "desc";
    } else {
      this._sortDirection = "asc";
    }
    this._sortColumn = columnId;
  }

  private _handleOverflowGroupBy = (ev: HaDropdownSelectEvent) => {
    const action = ev.detail.item.value;

    if (!action) {
      return;
    }

    switch (action) {
      case "collapse_all":
        this._collapseAllGroups();
        return;
      case "expand_all":
        this._expandAllGroups();
        return;
      case "none":
        this._setGroupColumn();
        return;
      default:
        this._setGroupColumn(action);
    }
  };

  private _setGroupColumn(columnId?: string) {
    this._groupColumn = columnId;
  }

  private _openSettings() {
    showDataTableSettingsDialog(this, {
      columns: this._columns(this.hass.localize),
      hiddenColumns: this.hiddenColumns,
      columnOrder: this.columnOrder,
      onUpdate: (
        columnOrder: string[] | undefined,
        hiddenColumns: string[] | undefined
      ) => {
        this.columnOrder = columnOrder;
        this.hiddenColumns = hiddenColumns;
      },
      localizeFunc: this.hass.localize,
    });
  }

  private _collapseAllGroups() {
    this._dataTable.collapseAllGroups();
  }

  private _expandAllGroups() {
    this._dataTable.expandAllGroups();
  }

  private _enableSelectMode() {
    this._selectMode = true;
  }

  private _disableSelectMode() {
    this._selectMode = false;
    this._dataTable.clearSelection();
  }

  private _selectAll() {
    this._dataTable.selectAll();
  }

  private _selectNone() {
    this._dataTable.clearSelection();
  }

  private _selectAllIssues() {
    this._dataTable.select(
      this._data
        .filter((statistic) => statistic.issues)
        .map((statistic) => statistic.statistic_id),
      true
    );
  }

  private _showStatisticsAdjustSumDialog(ev) {
    ev.stopPropagation();
    showStatisticsAdjustSumDialog(this, {
      statistic: ev.currentTarget.statistic,
    });
  }

  private _rowClicked(ev) {
    const id = ev.detail.id;
    if (id in this.hass.states) {
      fireEvent(this, "hass-more-info", { entityId: id });
    }
  }

  private async _validateStatistics() {
    const [statisticIds, issues] = await Promise.all([
      getStatisticIds(this.hass),
      validateStatistics(this.hass),
    ]);

    updateStatisticsIssues(this.hass);

    const statsIds = new Set();

    this._data = statisticIds.map((statistic) => {
      statsIds.add(statistic.statistic_id);
      return {
        ...statistic,
        state: this.hass.states[statistic.statistic_id],
        issues: issues[statistic.statistic_id],
      };
    });

    Object.keys(issues).forEach((statisticId) => {
      if (!statsIds.has(statisticId)) {
        this._data.push({
          statistic_id: statisticId,
          statistics_unit_of_measurement: "",
          source: "",
          state: this.hass.states[statisticId],
          issues: issues[statisticId],
          mean_type: StatisticMeanType.NONE,
          has_sum: false,
          unit_class: null,
        });
      }
    });
  }

  private _clearSelected = async () => {
    if (!this._selected.length) {
      return;
    }

    const deletableIds = this._selected;

    await showConfirmationDialog(this, {
      title: this.hass.localize(
        "ui.panel.config.developer-tools.tabs.statistics.multi_delete.title"
      ),
      text: html`${this.hass.localize(
        "ui.panel.config.developer-tools.tabs.statistics.multi_delete.info_text",
        { statistic_count: deletableIds.length }
      )}`,
      confirmText: this.hass.localize("ui.common.delete"),
      destructive: true,
      confirm: async () => {
        await clearStatistics(this.hass, deletableIds);
        this._validateStatistics();
        this._dataTable.clearSelection();
      },
    });
  };

  private _fixIssue = async (ev) => {
    const issues = (ev.currentTarget.data as StatisticsValidationResult[]).sort(
      (itemA, itemB) =>
        (FIX_ISSUES_ORDER[itemA.type] ?? 99) -
        (FIX_ISSUES_ORDER[itemB.type] ?? 99)
    );
    const issue = issues[0];
    await fixStatisticsIssue(this, issue);
    this._validateStatistics();
  };

  protected supportedShortcuts(): SupportedShortcuts {
    return {
      f: () => this._searchInput.focus(),
    };
  }

  static get styles(): CSSResultGroup {
    return [
      haStyle,
      css`
        :host {
          display: block;
          height: 100%;
        }

        .table-with-toolbars {
          height: 100%;
          display: flex;
          flex-direction: column;
          gap: var(--ha-space-2);
        }
        ha-data-table {
          width: 100%;
          flex-grow: 1;
          --data-table-border-width: 0;
        }

        :host([narrow]) {
          --expansion-panel-summary-padding: 0 16px;
        }
        .table-header {
          display: flex;
          align-items: center;
          --mdc-shape-small: 0;
          height: 56px;
          width: 100%;
          justify-content: space-between;
          padding: 0 var(--ha-space-4);
          gap: var(--ha-space-4);
          box-sizing: border-box;
          background: var(--primary-background-color);
          border-bottom: 1px solid var(--divider-color);
        }
        ha-input-search {
          flex: 1;
        }
        .search-toolbar {
          display: flex;
          align-items: center;
          color: var(--secondary-text-color);
        }

        .narrow-header-row {
          display: flex;
          align-items: center;
          gap: var(--ha-space-4);
          padding: 0 var(--ha-space-4);
          overflow-x: scroll;
          -ms-overflow-style: none;
          scrollbar-width: none;
        }

        .selection-bar {
          background: rgba(var(--rgb-primary-color), 0.1);
          width: 100%;
          display: flex;
          align-items: center;
          justify-content: space-between;
          padding: var(--ha-space-2) var(--ha-space-3);
          box-sizing: border-box;
          font-size: var(--ha-font-size-m);
          --ha-assist-chip-container-color: var(--card-background-color);
        }

        .selection-controls {
          display: flex;
          align-items: center;
          gap: var(--ha-space-2);
        }

        .selection-controls p {
          margin-left: var(--ha-space-2);
          margin-inline-start: var(--ha-space-2);
          margin-inline-end: initial;
        }

        .center-vertical {
          display: flex;
          align-items: center;
          gap: var(--ha-space-2);
        }

        .relative {
          position: relative;
        }

        ha-assist-chip {
          --ha-assist-chip-container-shape: 10px;
          --ha-assist-chip-container-color: var(--card-background-color);
        }

        .select-mode-chip {
          --md-assist-chip-icon-label-space: 0;
          --md-assist-chip-trailing-space: 8px;
        }

        ha-dialog {
          --mdc-dialog-min-width: 100vw;
          --mdc-dialog-max-width: 100vw;
          --mdc-dialog-min-height: 100%;
          --mdc-dialog-max-height: 100%;
          --vertical-align-dialog: flex-end;
          --ha-dialog-border-radius: var(--ha-border-radius-square);
          --dialog-content-padding: 0;
        }

        ha-dropdown ha-assist-chip {
          --md-assist-chip-trailing-space: 8px;
        }
      `,
    ];
  }
}

declare global {
  interface HTMLElementTagNameMap {
    "developer-tools-statistics": HaPanelDevStatistics;
  }
}