import React from 'react';
import Box from '@mui/material/Box';
import Tooltip from '@mui/material/Tooltip';
import type { SxProps, Theme } from '@mui/material/styles';
import LocationOnOutlinedIcon from '@mui/icons-material/LocationOnOutlined';
import StarRoundedIcon from '@mui/icons-material/StarRounded';
import VerifiedOutlinedIcon from '@mui/icons-material/VerifiedOutlined';
import InfoOutlinedIcon from '@mui/icons-material/InfoOutlined';
import { Card } from '../../atoms/Card';
import { Badge } from '../../atoms/Badge';
import type { BadgeColor } from '../../atoms/Badge/Badge';
import { Typography } from '../../atoms/Typography';

// ─── Types ───────────────────────────────────────────────────────────────────

/** Own props for the FA ProviderCard molecule (excludes HTML/Card passthrough) */
export interface ProviderCardOwnProps {
  /** Provider display name */
  name: string;
  /** Location text (suburb, city) */
  location: string;
  /** Whether this provider is a verified/trusted partner */
  verified?: boolean;
  /** Hero image URL — only rendered when verified */
  imageUrl?: string;
  /** Provider logo URL — rounded rectangle overlay on image, only rendered when verified */
  logoUrl?: string;
  /** Average rating (e.g. 4.8). Omit to hide reviews. */
  rating?: number;
  /** Number of reviews (e.g. 127). Omit to hide review count. */
  reviewCount?: number;
  /** Capability badge label (e.g. "Online Arrangement") */
  capabilityLabel?: string;
  /** Capability badge colour intent — maps to Badge colour */
  capabilityColor?: BadgeColor;
  /** Tooltip description for the capability badge (shown on hover/focus) */
  capabilityDescription?: string;
  /** Starting price in dollars (shown as "From $X") */
  startingPrice?: number;
  /** Whether this card is the currently selected provider */
  selected?: boolean;
  /** Click handler — entire card is clickable */
  onClick?: () => void;
  /** MUI sx prop for style overrides */
  sx?: SxProps<Theme>;
}

/** Props for the FA ProviderCard molecule — includes HTML/ARIA passthrough to Card */
export type ProviderCardProps = ProviderCardOwnProps &
  Omit<React.HTMLAttributes<HTMLDivElement>, keyof ProviderCardOwnProps>;

// ─── Constants ───────────────────────────────────────────────────────────────

const LOGO_SIZE = 'var(--fa-provider-card-logo-size)';
const LOGO_BORDER_RADIUS = 'var(--fa-provider-card-logo-border-radius)';
const IMAGE_HEIGHT = 'var(--fa-provider-card-image-height)';
const CONTENT_PADDING = 'var(--fa-provider-card-content-padding)';
const CONTENT_GAP = 'var(--fa-provider-card-content-gap)';

// ─── Component ───────────────────────────────────────────────────────────────

/**
 * Provider listing card for the FA design system.
 *
 * Displays a funeral provider in the provider select screen's scrollable
 * list. Supports verified (paid partner) and unverified (scraped listing)
 * providers with consistent text alignment for scan readability.
 *
 * **Verified providers** get a hero image, logo (rounded rectangle inside
 * image area), and "Verified" badge. **Unverified providers** show text
 * content only with a subtle top accent bar for visibility in mixed lists.
 *
 * Composes: Card (interactive, padding="none"), Badge, Typography.
 *
 * Usage:
 * ```tsx
 * <ProviderCard
 *   name="H.Parsons Funeral Directors"
 *   location="Wollongong"
 *   verified
 *   imageUrl="/images/parsons-hero.jpg"
 *   logoUrl="/images/parsons-logo.png"
 *   rating={4.8}
 *   reviewCount={127}
 *   capabilityLabel="Online Arrangement"
 *   capabilityColor="success"
 *   startingPrice={900}
 *   onClick={() => navigate(`/providers/parsons`)}
 * />
 * ```
 */
export const ProviderCard = React.forwardRef<HTMLDivElement, ProviderCardProps>(
  (
    {
      name,
      location,
      verified = false,
      imageUrl,
      logoUrl,
      rating,
      reviewCount,
      capabilityLabel,
      capabilityColor = 'default',
      capabilityDescription,
      selected = false,
      startingPrice,
      onClick,
      sx,
      ...rest
    },
    ref,
  ) => {
    const showImage = verified && imageUrl;
    const showLogo = verified && logoUrl;

    return (
      <Card
        ref={ref}
        interactive
        selected={selected}
        padding="none"
        onClick={onClick}
        {...rest}
        sx={[
          {
            overflow: 'hidden',
            // Override Card's default hover bg fill — shadow lift is enough
            // for listing cards. The grey bg fill blends into the shadow.
            '&:hover': {
              backgroundColor: 'background.paper',
            },
            // Unverified cards: subtle top accent so they don't get lost
            // in a mixed list. Verified cards have the hero image as anchor.
            ...(!showImage && {
              borderTop: '3px solid var(--fa-color-border-default)',
            }),
          },
          ...(Array.isArray(sx) ? sx : [sx]),
        ]}
      >
        {/* ── Image area (verified only) ── */}
        {showImage && (
          <Box
            role="img"
            aria-label={`Photo of ${name}`}
            sx={{
              position: 'relative',
              height: IMAGE_HEIGHT,
              backgroundImage: `url(${imageUrl})`,
              backgroundSize: 'cover',
              backgroundPosition: 'center',
              backgroundColor: 'var(--fa-color-brand-50)', // warm fallback if image fails
            }}
          >
            {/* Verified badge */}
            <Box sx={{ position: 'absolute', top: 12, right: 12 }}>
              <Badge variant="filled" color="brand" size="medium" icon={<VerifiedOutlinedIcon />}>
                Verified
              </Badge>
            </Box>

            {/* Logo — fully inside image area, bottom-left */}
            {showLogo && (
              <Box
                component="img"
                src={logoUrl}
                alt={`${name} logo`}
                sx={{
                  position: 'absolute',
                  bottom: 12,
                  left: CONTENT_PADDING,
                  width: LOGO_SIZE,
                  height: LOGO_SIZE,
                  borderRadius: LOGO_BORDER_RADIUS,
                  objectFit: 'cover',
                  backgroundColor: 'background.paper',
                  boxShadow: 'var(--fa-shadow-sm)',
                  border: '2px solid var(--fa-color-white)',
                }}
              />
            )}
          </Box>
        )}

        {/* ── Content area ── */}
        <Box
          sx={{
            display: 'flex',
            flexDirection: 'column',
            gap: CONTENT_GAP,
            p: CONTENT_PADDING,
          }}
        >
          {/* Provider name — full width, no logo competition */}
          <Typography variant="h5" maxLines={2}>
            {name}
          </Typography>

          {/* Price — "Packages from $X" with subtle size differentiation */}
          {startingPrice != null && (
            <Box sx={{ display: 'flex', alignItems: 'baseline', gap: 0.5 }}>
              <Typography variant="body2" color="text.secondary">
                Packages from
              </Typography>
              <Typography
                variant="h6"
                component="span"
                color="primary"
                sx={{ fontWeight: 500, letterSpacing: '-0.01em' }}
              >
                ${startingPrice.toLocaleString('en-AU')}
              </Typography>
            </Box>
          )}

          {/* Meta row: location + reviews */}
          <Box
            sx={{
              display: 'flex',
              alignItems: 'center',
              gap: 2,
              flexWrap: 'wrap',
            }}
          >
            {/* Location */}
            <Box sx={{ display: 'flex', alignItems: 'center', gap: 0.5 }}>
              <LocationOnOutlinedIcon sx={{ fontSize: 14, color: 'text.secondary' }} />
              <Typography variant="caption" color="text.secondary">
                {location}
              </Typography>
            </Box>

            {/* Reviews */}
            {rating != null && (
              <Box
                sx={{ display: 'flex', alignItems: 'center', gap: 0.5 }}
                aria-label={`Rated ${rating} out of 5${reviewCount != null ? `, ${reviewCount} reviews` : ''}`}
              >
                <StarRoundedIcon sx={{ fontSize: 14, color: 'warning.main' }} aria-hidden />
                <Typography variant="caption" color="text.secondary">
                  {rating}
                  {reviewCount != null && ` (${reviewCount.toLocaleString('en-AU')})`}
                </Typography>
              </Box>
            )}
          </Box>

          {/* Capability badge — trailing info icon signals hover-for-definition */}
          {capabilityLabel && (
            <Box>
              {capabilityDescription ? (
                <Tooltip title={capabilityDescription} arrow placement="top" enterTouchDelay={0}>
                  <Badge color={capabilityColor} size="medium" sx={{ cursor: 'help' }}>
                    {capabilityLabel}
                    <InfoOutlinedIcon />
                  </Badge>
                </Tooltip>
              ) : (
                <Badge color={capabilityColor} size="medium">
                  {capabilityLabel}
                  <InfoOutlinedIcon />
                </Badge>
              )}
            </Box>
          )}
        </Box>
      </Card>
    );
  },
);

ProviderCard.displayName = 'ProviderCard';
export default ProviderCard;