import { Box } from "@mui/material";
import { Text } from "@/components/ui/text";
import {
  buildAddressQuery,
  hasCompleteAddress,
  mapsEmbedUrl,
  type AddressParts,
} from "@/lib/address/vendor-address";

type AddressMapPreviewProps = {
  /** Structured parts, as held by a form or a detail view. */
  address?: Partial<AddressParts>;
  /**
   * An already-composed address line, for callers that hold saved data rather
   * than live input — the Work Order vendor dialog gets one string from the
   * vendor dropdown payload. Ignored when `address` is given.
   */
  query?: string;
  height?: number;
  /**
   * Render a compact accessible placeholder while the structured address is
   * incomplete, instead of nothing. Meant for Add/Edit forms, where the empty
   * state tells the dispatcher which parts the preview is still waiting on.
   */
  placeholderWhenIncomplete?: boolean;
};

const INCOMPLETE_PLACEHOLDER_MESSAGE =
  "Map preview appears once Street, City, and State are all filled.";

/**
 * Small inline map for a structured address.
 *
 * Uses Google's keyless `output=embed` form deliberately: SH-271 asks for a
 * preview with no API key, so there is no Maps JavaScript API, no Places
 * request and no billing account behind this.
 *
 * Structured input renders nothing until Street, City and State are all
 * present — a preview of a half-typed address points somewhere misleading,
 * which is worse than no map. Add/Edit forms opt into a compact placeholder
 * for that incomplete state; a pre-composed saved line is map-only and renders
 * only when non-empty.
 */
export function AddressMapPreview({
  address,
  query: rawQuery,
  height = 160,
  placeholderWhenIncomplete = false,
}: AddressMapPreviewProps) {
  // Structured input is held to the completeness rule; a pre-composed line is
  // saved data and only has to be non-empty.
  const query = address ? buildAddressQuery(address) : (rawQuery ?? "").trim();
  const complete = address ? hasCompleteAddress(address) : Boolean(query);

  if (!complete) {
    if (!(address != null && placeholderWhenIncomplete)) return null;
    return (
      <Box
        role="status"
        sx={{
          borderRadius: 1,
          border: "1px dashed",
          borderColor: "divider",
          minHeight: 56,
          display: "flex",
          alignItems: "center",
          justifyContent: "center",
          px: 1.5,
          py: 1,
        }}
      >
        <Text variant="caption" tone="muted" sx={{ textAlign: "center" }}>
          {INCOMPLETE_PLACEHOLDER_MESSAGE}
        </Text>
      </Box>
    );
  }

  return (
    <Box
      sx={{
        borderRadius: 1,
        overflow: "hidden",
        border: 1,
        borderColor: "divider",
        lineHeight: 0,
      }}
    >
      <Box
        component="iframe"
        title={`Map of ${query}`}
        src={mapsEmbedUrl({ street: query })}
        loading="lazy"
        referrerPolicy="no-referrer-when-downgrade"
        sx={{ display: "block", width: "100%", height, border: 0 }}
      />
    </Box>
  );
}