import {
  DeesElement,
  html,
  customElement,
  type TemplateResult,
  css,
  state,
  cssManager,
} from '@design.estate/dees-element';
import * as appstate from '../../appstate.js';
import * as interfaces from '../../../dist_ts_interfaces/index.js';
import { viewHostCss } from '../shared/css.js';
import { type IStatsTile } from '@design.estate/dees-catalog';

declare global {
  interface HTMLElementTagNameMap {
    'ops-view-certificates': OpsViewCertificates;
  }
}

@customElement('ops-view-certificates')
export class OpsViewCertificates extends DeesElement {
  @state()
  accessor certState: appstate.ICertificateState = appstate.certificateStatePart.getState()!;

  @state()
  accessor acmeState: appstate.IAcmeConfigState = appstate.acmeConfigStatePart.getState()!;

  constructor() {
    super();
    const certSub = appstate.certificateStatePart.select().subscribe((newState) => {
      this.certState = newState;
    });
    this.rxSubscriptions.push(certSub);
    const acmeSub = appstate.acmeConfigStatePart.select().subscribe((newState) => {
      this.acmeState = newState;
    });
    this.rxSubscriptions.push(acmeSub);
  }

  async connectedCallback() {
    await super.connectedCallback();
    await appstate.certificateStatePart.dispatchAction(appstate.fetchCertificateOverviewAction, null);
    await appstate.acmeConfigStatePart.dispatchAction(appstate.fetchAcmeConfigAction, null);
  }

  public static styles = [
    cssManager.defaultStyles,
    viewHostCss,
    css`
      .certificatesContainer {
        display: flex;
        flex-direction: column;
        gap: 24px;
      }

      .acmeCard {
        padding: 16px 20px;
        background: ${cssManager.bdTheme('#f9fafb', '#111827')};
        border: 1px solid ${cssManager.bdTheme('#e5e7eb', '#374151')};
        border-radius: 8px;
      }

      .acmeCard.acmeCardEmpty {
        background: ${cssManager.bdTheme('#fffbeb', '#1c1917')};
        border-color: ${cssManager.bdTheme('#fde68a', '#78350f')};
      }

      .acmeCardHeader {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 12px;
      }

      .acmeCardTitle {
        font-size: 14px;
        font-weight: 600;
        color: ${cssManager.bdTheme('#111827', '#f3f4f6')};
      }

      .acmeGrid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 12px 24px;
      }

      .acmeField {
        display: flex;
        flex-direction: column;
        gap: 2px;
      }

      .acmeLabel {
        font-size: 11px;
        text-transform: uppercase;
        letter-spacing: 0.03em;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      .acmeValue {
        font-size: 13px;
        color: ${cssManager.bdTheme('#111827', '#f3f4f6')};
      }

      .acmeEmptyHint {
        margin: 0;
        font-size: 13px;
        line-height: 1.5;
        color: ${cssManager.bdTheme('#78350f', '#fde68a')};
      }

      .statusBadge {
        display: inline-flex;
        align-items: center;
        padding: 3px 10px;
        border-radius: 12px;
        font-size: 12px;
        font-weight: 600;
        letter-spacing: 0.02em;
        text-transform: uppercase;
      }

      .statusBadge.valid {
        background: ${cssManager.bdTheme('#dcfce7', '#14532d')};
        color: ${cssManager.bdTheme('#166534', '#4ade80')};
      }

      .statusBadge.expiring {
        background: ${cssManager.bdTheme('#fff7ed', '#431407')};
        color: ${cssManager.bdTheme('#9a3412', '#fb923c')};
      }

      .statusBadge.expired,
      .statusBadge.failed {
        background: ${cssManager.bdTheme('#fef2f2', '#450a0a')};
        color: ${cssManager.bdTheme('#991b1b', '#f87171')};
      }

      .statusBadge.provisioning {
        background: ${cssManager.bdTheme('#eff6ff', '#172554')};
        color: ${cssManager.bdTheme('#1e40af', '#60a5fa')};
      }

      .statusBadge.unknown {
        background: ${cssManager.bdTheme('#f3f4f6', '#1f2937')};
        color: ${cssManager.bdTheme('#4b5563', '#9ca3af')};
      }

      .sourceBadge {
        display: inline-flex;
        align-items: center;
        padding: 3px 8px;
        border-radius: 4px;
        font-size: 11px;
        font-weight: 500;
        background: ${cssManager.bdTheme('#f3f4f6', '#1f2937')};
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
      }

      .routePills {
        display: flex;
        flex-wrap: wrap;
        gap: 4px;
      }

      .routePill {
        display: inline-flex;
        align-items: center;
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 12px;
        background: ${cssManager.bdTheme('#e0e7ff', '#1e1b4b')};
        color: ${cssManager.bdTheme('#3730a3', '#a5b4fc')};
      }

      .moreCount {
        font-size: 11px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
        padding: 2px 6px;
      }

      .errorText {
        font-size: 12px;
        color: ${cssManager.bdTheme('#991b1b', '#f87171')};
        max-width: 200px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

      .backoffIndicator {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        font-size: 11px;
        color: ${cssManager.bdTheme('#9a3412', '#fb923c')};
        padding: 2px 6px;
        border-radius: 4px;
        background: ${cssManager.bdTheme('#fff7ed', '#431407')};
      }

      .expiryInfo {
        font-size: 12px;
      }

      .expiryInfo .daysLeft {
        font-size: 11px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      .expiryInfo .daysLeft.warn {
        color: ${cssManager.bdTheme('#9a3412', '#fb923c')};
      }

      .expiryInfo .daysLeft.danger {
        color: ${cssManager.bdTheme('#991b1b', '#f87171')};
      }
    `,
  ];

  public render(): TemplateResult {
    const { summary } = this.certState;

    return html`
      <dees-heading level="3">Certificates</dees-heading>

      <div class="certificatesContainer">
        ${this.renderAcmeSettingsCard()}
        ${this.renderStatsTiles(summary)}
        ${this.renderCertificateTable()}
      </div>
    `;
  }

  private renderAcmeSettingsCard(): TemplateResult {
    const config = this.acmeState.config;

    if (!config) {
      return html`
        <div class="acmeCard acmeCardEmpty">
          <div class="acmeCardHeader">
            <span class="acmeCardTitle">ACME Settings</span>
            <dees-button
              eventName="edit-acme"
              @click=${() => this.showEditAcmeDialog()}
              .type=${'highlighted'}
            >Configure</dees-button>
          </div>
          <p class="acmeEmptyHint">
            No ACME configuration yet. Click <strong>Configure</strong> to set up automated TLS
            certificate issuance via Let's Encrypt. You'll also need at least one DNS provider
            under <strong>Domains &gt; Providers</strong>.
          </p>
        </div>
      `;
    }

    return html`
      <div class="acmeCard">
        <div class="acmeCardHeader">
          <span class="acmeCardTitle">ACME Settings</span>
          <dees-button eventName="edit-acme" @click=${() => this.showEditAcmeDialog()}>Edit</dees-button>
        </div>
        <div class="acmeGrid">
          <div class="acmeField">
            <span class="acmeLabel">Account email</span>
            <span class="acmeValue">${config.accountEmail || '(not set)'}</span>
          </div>
          <div class="acmeField">
            <span class="acmeLabel">Status</span>
            <span class="acmeValue">
              <span class="statusBadge ${config.enabled ? 'valid' : 'unknown'}">
                ${config.enabled ? 'enabled' : 'disabled'}
              </span>
            </span>
          </div>
          <div class="acmeField">
            <span class="acmeLabel">Mode</span>
            <span class="acmeValue">
              <span class="statusBadge ${config.useProduction ? 'valid' : 'provisioning'}">
                ${config.useProduction ? 'production' : 'staging'}
              </span>
            </span>
          </div>
          <div class="acmeField">
            <span class="acmeLabel">Auto-renew</span>
            <span class="acmeValue">${config.autoRenew ? 'on' : 'off'}</span>
          </div>
          <div class="acmeField">
            <span class="acmeLabel">Renewal threshold</span>
            <span class="acmeValue">${config.renewThresholdDays} days</span>
          </div>
        </div>
      </div>
    `;
  }

  private async showEditAcmeDialog() {
    const { DeesModal, DeesToast } = await import('@design.estate/dees-catalog');
    const current = this.acmeState.config;

    DeesModal.createAndShow({
      heading: current ? 'Edit ACME Settings' : 'Configure ACME',
      content: html`
        <dees-form>
          <dees-input-text
            .key=${'accountEmail'}
            .label=${'Account email'}
            .value=${current?.accountEmail ?? ''}
            .required=${true}
          ></dees-input-text>
          <dees-input-checkbox
            .key=${'enabled'}
            .label=${'Enabled'}
            .value=${current?.enabled ?? true}
          ></dees-input-checkbox>
          <dees-input-checkbox
            .key=${'useProduction'}
            .label=${"Use Let's Encrypt production (uncheck for staging)"}
            .value=${current?.useProduction ?? true}
          ></dees-input-checkbox>
          <dees-input-checkbox
            .key=${'autoRenew'}
            .label=${'Auto-renew certificates'}
            .value=${current?.autoRenew ?? true}
          ></dees-input-checkbox>
          <dees-input-text
            .key=${'renewThresholdDays'}
            .label=${'Renewal threshold (days)'}
            .value=${String(current?.renewThresholdDays ?? 30)}
          ></dees-input-text>
        </dees-form>
        <p style="margin-top: 12px; font-size: 12px; opacity: 0.7;">
          Most fields take effect on the next dcrouter restart (SmartAcme is instantiated once at
          startup). Changing the account email creates a new Let's Encrypt account — only do this
          if you know what you're doing.
        </p>
      `,
      menuOptions: [
        { name: 'Cancel', action: async (modalArg: any) => modalArg.destroy() },
        {
          name: 'Save',
          action: async (modalArg: any) => {
            const form = modalArg.shadowRoot
              ?.querySelector('.content')
              ?.querySelector('dees-form');
            if (!form) return;
            const data = await form.collectFormData();
            const email = String(data.accountEmail ?? '').trim();
            if (!email) {
              DeesToast.show({
                message: 'Account email is required',
                type: 'warning',
                duration: 2500,
              });
              return;
            }
            const threshold = parseInt(String(data.renewThresholdDays ?? '30'), 10);
            await appstate.acmeConfigStatePart.dispatchAction(appstate.updateAcmeConfigAction, {
              accountEmail: email,
              enabled: Boolean(data.enabled),
              useProduction: Boolean(data.useProduction),
              autoRenew: Boolean(data.autoRenew),
              renewThresholdDays: Number.isFinite(threshold) ? threshold : 30,
            });
            modalArg.destroy();
          },
        },
      ],
    });
  }

  private renderStatsTiles(summary: appstate.ICertificateState['summary']): TemplateResult {
    const tiles: IStatsTile[] = [
      {
        id: 'total',
        title: 'Total Certificates',
        value: summary.total,
        type: 'number',
        icon: 'lucide:ShieldHalf',
        color: '#3b82f6',
      },
      {
        id: 'valid',
        title: 'Valid',
        value: summary.valid,
        type: 'number',
        icon: 'lucide:Check',
        color: '#22c55e',
      },
      {
        id: 'expiring',
        title: 'Expiring Soon',
        value: summary.expiring,
        type: 'number',
        icon: 'lucide:Clock',
        color: '#f59e0b',
      },
      {
        id: 'problems',
        title: 'Failed / Expired',
        value: summary.failed + summary.expired,
        type: 'number',
        icon: 'lucide:TriangleAlert',
        color: '#ef4444',
      },
    ];

    return html`
      <dees-statsgrid
        .tiles=${tiles}
        .minTileWidth=${200}
        .gridActions=${[
          {
            name: 'Refresh',
            iconName: 'lucide:RefreshCw',
            action: async () => {
              await appstate.certificateStatePart.dispatchAction(
                appstate.fetchCertificateOverviewAction,
                null
              );
            },
          },
        ]}
      ></dees-statsgrid>
    `;
  }

  private renderCertificateTable(): TemplateResult {
    return html`
      <dees-table
        .data=${this.certState.certificates}
        .showColumnFilters=${true}
        .displayFunction=${(cert: interfaces.requests.ICertificateInfo) => ({
          Domain: cert.domain,
          Routes: this.renderRoutePills(cert.routeNames),
          Status: this.renderStatusBadge(cert.status),
          Source: this.renderSourceBadge(cert.source),
          Expires: this.renderExpiry(cert.expiryDate),
          Error: cert.backoffInfo
            ? html`<span class="backoffIndicator">${cert.backoffInfo.failures} failures, retry ${this.formatRetryTime(cert.backoffInfo.retryAfter)}</span>`
            : cert.error
              ? html`<span class="errorText" title="${cert.error}">${cert.error}</span>`
              : '',
        })}
        .dataActions=${[
          {
            name: 'Import Certificate',
            iconName: 'lucide:upload',
            type: ['header'],
            actionFunc: async () => {
              const { DeesModal } = await import('@design.estate/dees-catalog');
              await DeesModal.createAndShow({
                heading: 'Import Certificate',
                content: html`
                  <dees-form>
                    <dees-input-fileupload
                      key="certJsonFile"
                      label="Certificate JSON (.tsclass.cert.json)"
                      accept=".json"
                      .multiple=${false}
                      required
                    ></dees-input-fileupload>
                  </dees-form>
                `,
                menuOptions: [
                  {
                    name: 'Import',
                    iconName: 'lucide:upload',
                    action: async (modal: any) => {
                      const { DeesToast } = await import('@design.estate/dees-catalog');
                      try {
                        const form = modal.shadowRoot!.querySelector('dees-form') as any;
                        const formData = await form.collectFormData();
                        const files = formData.certJsonFile;
                        if (!files || files.length === 0) {
                          DeesToast.show({ message: 'Please select a JSON file.', type: 'warning', duration: 3000 });
                          return;
                        }
                        const file = files[0];
                        const text = await file.text();
                        const cert = JSON.parse(text);
                        if (!cert.domainName || !cert.publicKey || !cert.privateKey) {
                          DeesToast.show({ message: 'Invalid cert JSON: missing domainName, publicKey, or privateKey.', type: 'error', duration: 4000 });
                          return;
                        }
                        await appstate.certificateStatePart.dispatchAction(
                          appstate.importCertificateAction,
                          cert,
                        );
                        DeesToast.show({ message: `Certificate imported for ${cert.domainName}`, type: 'success', duration: 3000 });
                        modal.destroy();
                      } catch (err: unknown) {
                        DeesToast.show({ message: `Import failed: ${(err as Error).message}`, type: 'error', duration: 4000 });
                      }
                    },
                  },
                ],
              });
            },
          },
          {
            name: 'Reprovision',
            iconName: 'lucide:RefreshCw',
            type: ['inRow', 'contextmenu'],
            actionFunc: async (actionData: { item: interfaces.requests.ICertificateInfo }) => {
              const cert = actionData.item;
              if (!cert.canReprovision) {
                const { DeesToast } = await import('@design.estate/dees-catalog');
                DeesToast.show({
                  message: 'This certificate source does not support reprovisioning.',
                  type: 'warning',
                  duration: 3000,
                });
                return;
              }

              const doReprovision = async (forceRenew = false) => {
                await appstate.certificateStatePart.dispatchAction(
                  appstate.reprovisionCertificateAction,
                  { domain: cert.domain, forceRenew },
                );
                const { DeesToast } = await import('@design.estate/dees-catalog');
                DeesToast.show({
                  message: forceRenew
                    ? `Force renewal triggered for ${cert.domain}`
                    : `Reprovisioning triggered for ${cert.domain}`,
                  type: 'success',
                  duration: 3000,
                });
              };

              if (cert.status === 'valid') {
                const { DeesModal } = await import('@design.estate/dees-catalog');
                DeesModal.createAndShow({
                  heading: 'Certificate Still Valid',
                  content: html`<p style="margin: 0; line-height: 1.5;">The certificate for <strong>${cert.domain}</strong> is still valid${cert.expiryDate ? ` until ${new Date(cert.expiryDate).toLocaleDateString()}` : ''}. Do you want to force renew it now?</p>`,
                  menuOptions: [
                    { name: 'Cancel', action: async (modalArg: any) => modalArg.destroy() },
                    {
                      name: 'Force Renew',
                      action: async (modalArg: any) => {
                        await modalArg.destroy();
                        await doReprovision(true);
                      },
                    },
                  ],
                });
              } else {
                await doReprovision();
              }
            },
          },
          {
            name: 'Export',
            iconName: 'lucide:download',
            type: ['inRow', 'contextmenu'],
            actionFunc: async (actionData: { item: interfaces.requests.ICertificateInfo }) => {
              const { DeesToast } = await import('@design.estate/dees-catalog');
              const cert = actionData.item;
              try {
                const response = await appstate.fetchCertificateExport(cert.domain);
                if (response.success && response.cert) {
                  const safeDomain = cert.domain.replace(/\*/g, '_wildcard');
                  this.downloadJsonFile(`${safeDomain}.tsclass.cert.json`, response.cert);
                  DeesToast.show({ message: `Certificate exported for ${cert.domain}`, type: 'success', duration: 3000 });
                } else {
                  DeesToast.show({ message: response.message || 'Export failed', type: 'error', duration: 4000 });
                }
              } catch (err: unknown) {
                DeesToast.show({ message: `Export failed: ${(err as Error).message}`, type: 'error', duration: 4000 });
              }
            },
          },
          {
            name: 'Delete',
            iconName: 'lucide:trash-2',
            type: ['inRow', 'contextmenu'],
            actionFunc: async (actionData: { item: interfaces.requests.ICertificateInfo }) => {
              const cert = actionData.item;
              const { DeesModal, DeesToast } = await import('@design.estate/dees-catalog');
              await DeesModal.createAndShow({
                heading: `Delete Certificate: ${cert.domain}`,
                content: html`
                  <div style="padding: 20px; font-size: 14px;">
                    <p>Are you sure you want to delete the certificate data for <strong>${cert.domain}</strong>?</p>
                    <p style="color: #f59e0b; margin-top: 12px;">Note: The certificate may remain in proxy memory until the next restart or reprovisioning.</p>
                  </div>
                `,
                menuOptions: [
                  {
                    name: 'Delete',
                    iconName: 'lucide:trash-2',
                    action: async (modal: any) => {
                      try {
                        await appstate.certificateStatePart.dispatchAction(
                          appstate.deleteCertificateAction,
                          cert.domain,
                        );
                        DeesToast.show({ message: `Certificate deleted for ${cert.domain}`, type: 'success', duration: 3000 });
                        modal.destroy();
                      } catch (err: unknown) {
                        DeesToast.show({ message: `Delete failed: ${(err as Error).message}`, type: 'error', duration: 4000 });
                      }
                    },
                  },
                ],
              });
            },
          },
          {
            name: 'View Details',
            iconName: 'fa:magnifyingGlass',
            type: ['doubleClick', 'contextmenu'],
            actionFunc: async (actionData: { item: interfaces.requests.ICertificateInfo }) => {
              const cert = actionData.item;
              const { DeesModal } = await import('@design.estate/dees-catalog');
              await DeesModal.createAndShow({
                heading: `Certificate: ${cert.domain}`,
                content: html`
                  <div style="padding: 20px;">
                    <dees-dataview-codebox
                      .heading=${'Certificate Details'}
                      progLang="json"
                      .codeToDisplay=${JSON.stringify(cert, null, 2)}
                    ></dees-dataview-codebox>
                  </div>
                `,
                menuOptions: [
                  {
                    name: 'Copy Domain',
                    iconName: 'lucide:Copy',
                    action: async () => {
                      await navigator.clipboard.writeText(cert.domain);
                    },
                  },
                ],
              });
            },
          },
        ]}
        heading1="Certificate Status"
        heading2="TLS certificates by domain"
        searchable
        .pagination=${true}
        .paginationSize=${50}
        dataName="certificate"
      ></dees-table>
    `;
  }

  private downloadJsonFile(filename: string, data: any): void {
    const json = JSON.stringify(data, null, 2);
    const blob = new Blob([json], { type: 'application/json' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = filename;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    URL.revokeObjectURL(url);
  }

  private renderRoutePills(routeNames: string[]): TemplateResult {
    const maxShow = 3;
    const visible = routeNames.slice(0, maxShow);
    const remaining = routeNames.length - maxShow;

    return html`
      <span class="routePills">
        ${visible.map((r) => html`<span class="routePill">${r}</span>`)}
        ${remaining > 0 ? html`<span class="moreCount">+${remaining} more</span>` : ''}
      </span>
    `;
  }

  private renderStatusBadge(status: interfaces.requests.TCertificateStatus): TemplateResult {
    return html`<span class="statusBadge ${status}">${status}</span>`;
  }

  private renderSourceBadge(source: interfaces.requests.TCertificateSource): TemplateResult {
    const labels: Record<string, string> = {
      acme: 'ACME',
      'provision-function': 'Custom',
      static: 'Static',
      none: 'None',
    };
    return html`<span class="sourceBadge">${labels[source] || source}</span>`;
  }

  private renderExpiry(expiryDate?: string): TemplateResult {
    if (!expiryDate) {
      return html`<span style="color: ${cssManager.bdTheme('#9ca3af', '#4b5563')}">--</span>`;
    }

    const expiry = new Date(expiryDate);
    const now = new Date();
    const daysLeft = Math.ceil((expiry.getTime() - now.getTime()) / (1000 * 60 * 60 * 24));

    const dateStr = expiry.toLocaleDateString();
    let daysClass = '';
    let daysText = '';

    if (daysLeft < 0) {
      daysClass = 'danger';
      daysText = `(expired)`;
    } else if (daysLeft < 30) {
      daysClass = 'warn';
      daysText = `(${daysLeft}d left)`;
    } else {
      daysText = `(${daysLeft}d left)`;
    }

    return html`
      <span class="expiryInfo">
        ${dateStr} <span class="daysLeft ${daysClass}">${daysText}</span>
      </span>
    `;
  }

  private formatRetryTime(retryAfter?: string): string {
    if (!retryAfter) return 'soon';
    const retryDate = new Date(retryAfter);
    const now = new Date();
    const diffMs = retryDate.getTime() - now.getTime();
    if (diffMs <= 0) return 'now';
    const diffMin = Math.ceil(diffMs / 60000);
    if (diffMin < 60) return `in ${diffMin}m`;
    const diffHours = Math.ceil(diffMin / 60);
    return `in ${diffHours}h`;
  }
}