/**
 * Vue consent components: ConsentProvider, ConsentGate, ConsentPlaceholder,
 * ConsentBanner.
 *
 * Phase 4: extracted from vue/index.ts.
 */

import { computed, defineComponent, h, type PropType } from 'vue';
import type { ConsentCategory, ConsentConfig } from '../types';
import { provideConsent, useConsent } from './composables';

/**
 * ConsentProvider - Wrapper-Komponente.
 */
export const ConsentProvider = defineComponent({
  name: 'ConsentProvider',
  props: {
    config: {
      type: Object as PropType<ConsentConfig>,
      required: true,
    },
  },
  setup(props, { slots }) {
    provideConsent(props.config);
    return () => slots.default?.();
  },
});

/**
 * ConsentGate - Zeigt Inhalt nur bei Consent.
 */
export const ConsentGate = defineComponent({
  name: 'ConsentGate',
  props: {
    category: {
      type: String as PropType<ConsentCategory>,
      required: true,
    },
  },
  setup(props, { slots }) {
    const { hasConsent, isLoading } = useConsent();

    return () => {
      if (isLoading.value) {
        return slots.fallback?.() ?? null;
      }
      if (!hasConsent(props.category)) {
        return slots.placeholder?.() ?? null;
      }
      return slots.default?.();
    };
  },
});

/**
 * ConsentPlaceholder - Placeholder fuer blockierten Inhalt.
 */
export const ConsentPlaceholder = defineComponent({
  name: 'ConsentPlaceholder',
  props: {
    category: {
      type: String as PropType<ConsentCategory>,
      required: true,
    },
    message: {
      type: String,
      default: '',
    },
    buttonText: {
      type: String,
      default: 'Cookie-Einstellungen öffnen',
    },
  },
  setup(props) {
    const { showSettings } = useConsent();

    const categoryNames: Record<ConsentCategory, string> = {
      essential: 'Essentielle Cookies',
      functional: 'Funktionale Cookies',
      analytics: 'Statistik-Cookies',
      marketing: 'Marketing-Cookies',
      social: 'Social Media-Cookies',
    };

    const displayMessage = computed(() => {
      return (
        props.message ||
        `Dieser Inhalt erfordert ${categoryNames[props.category]}.`
      );
    });

    return () =>
      h('div', { class: 'bp-consent-placeholder' }, [
        h('p', displayMessage.value),
        h(
          'button',
          {
            type: 'button',
            onClick: showSettings,
          },
          props.buttonText
        ),
      ]);
  },
});

/**
 * ConsentBanner - Cookie-Banner Komponente (headless with default UI).
 */
export const ConsentBanner = defineComponent({
  name: 'ConsentBanner',
  setup(_, { slots }) {
    const {
      consent,
      isBannerVisible,
      needsConsent,
      acceptAll,
      rejectAll,
      saveSelection,
      showSettings,
      hideBanner,
    } = useConsent();

    const slotProps = computed(() => ({
      isVisible: isBannerVisible.value,
      consent: consent.value,
      needsConsent: needsConsent.value,
      onAcceptAll: acceptAll,
      onRejectAll: rejectAll,
      onSaveSelection: saveSelection,
      onShowSettings: showSettings,
      onClose: hideBanner,
    }));

    return () => {
      if (slots.default) {
        return slots.default(slotProps.value);
      }
      if (!isBannerVisible.value) {
        return null;
      }
      return h(
        'div',
        {
          class: 'bp-consent-banner',
          role: 'dialog',
          'aria-modal': 'true',
          'aria-label': 'Cookie-Einstellungen',
        },
        [
          h('div', { class: 'bp-consent-banner-content' }, [
            h('h2', 'Datenschutzeinstellungen'),
            h(
              'p',
              'Wir nutzen Cookies und ähnliche Technologien, um Ihnen ein optimales Nutzererlebnis zu bieten.'
            ),
            h('div', { class: 'bp-consent-banner-actions' }, [
              h(
                'button',
                {
                  type: 'button',
                  class: 'bp-consent-btn bp-consent-btn-reject',
                  onClick: rejectAll,
                },
                'Alle ablehnen'
              ),
              h(
                'button',
                {
                  type: 'button',
                  class: 'bp-consent-btn bp-consent-btn-settings',
                  onClick: showSettings,
                },
                'Einstellungen'
              ),
              h(
                'button',
                {
                  type: 'button',
                  class: 'bp-consent-btn bp-consent-btn-accept',
                  onClick: acceptAll,
                },
                'Alle akzeptieren'
              ),
            ]),
          ]),
        ]
      );
    };
  },
});