"use client";

import { PHASES, type CaseStatus } from "@/lib/api/case-status";
import { statusLabel } from "@/lib/api/case-status";
import { StatusChanger } from "@/components/cases/status-changer";
import { StatusGuide } from "@/components/cases/status-guide";
import { AgentStatusWidget } from "@/components/cases/agent-status-widget";
import { expectedOutcomes } from "@/lib/schemas/case";
import { formatDate } from "@/lib/format-date";
import type { CaseDetail } from "@/lib/api/cases";

/*
 * StatusHero — the single, prominent home for case status (mockup 18b, INV-IA1).
 * Renders the horizontal pipeline stepper, the current-stage chip, the manual
 * status changer, and a meta strip. This is the ONLY surface in the app that
 * owns the status changer / pipeline timeline (status was removed from the
 * compose editor and the other case tabs). Reuses the shared StatusChanger,
 * StatusGuide and AgentStatusWidget so no parallel status path is created (G2).
 */

const EXPECTED_OUTCOME_LABELS: Record<string, string> = Object.fromEntries(
  expectedOutcomes.map((o) => [o.value, o.label]),
);

function phaseIndexOf(status?: CaseStatus): number {
  if (!status) return -1;
  return PHASES.findIndex((p) => p.statuses.includes(status));
}

/** Horizontal RTL stepper over the 5 lifecycle phases (mockup 18b .stepper). */
function HorizontalStepper({ status }: { status?: CaseStatus }) {
  const currentIdx = phaseIndexOf(status);
  return (
    <ol className="flex items-start gap-0">
      {PHASES.map((phase, i) => {
        const state =
          currentIdx === -1 ? "pending"
          : i < currentIdx ? "done"
          : i === currentIdx ? "now"
          : "pending";

        const isLast = i === PHASES.length - 1;

        const knobTone =
          state === "done"
            ? "bg-success [box-shadow:0_0_0_1px_var(--color-success)]"
            : state === "now"
              ? "bg-gold [box-shadow:0_0_0_2px_var(--color-gold-wash),0_0_0_3px_var(--color-gold)]"
              : "bg-rule [box-shadow:0_0_0_1px_var(--color-rule)]";

        const labelTone =
          state === "done"
            ? "text-ink-soft"
            : state === "now"
              ? "text-navy font-bold"
              : "text-ink-muted";

        // connector runs toward the next (earlier-completed) phase; in RTL the
        // line sits to the start side. Coloured when this phase is done.
        const segTone = state === "done" ? "bg-success" : "bg-rule";

        return (
          <li
            key={phase.key}
            className="relative flex-1 pt-7 text-center"
          >
            {!isLast && (
              <span
                className={`absolute top-[9px] h-0.5 w-full ${segTone}`}
                style={{ insetInlineStart: "50%" }}
                aria-hidden
              />
            )}
            <span
              className={`absolute top-[3px] h-4 w-4 -translate-x-1/2 rounded-full border-[3px] border-surface ${knobTone}`}
              style={{ insetInlineStart: "50%", transform: "translateX(50%)" }}
              aria-hidden
            />
            <span className={`block text-[0.78rem] ${labelTone}`}>
              {phase.label}
              <span className="block text-[0.68rem] text-ink-muted mt-0.5 tabular-nums">
                {state === "now" ? "כעת" : state === "done" ? "✓" : "—"}
              </span>
            </span>
          </li>
        );
      })}
    </ol>
  );
}

export function StatusHero({
  caseNumber,
  data,
}: {
  caseNumber: string;
  data?: CaseDetail;
}) {
  const status = data?.status;
  const expectedOutcomeLabel = data?.expected_outcome
    ? EXPECTED_OUTCOME_LABELS[data.expected_outcome] ?? data.expected_outcome
    : null;

  return (
    <div className="rounded-xl border border-rule bg-surface shadow-sm px-6 py-5">
      {/* hero top — title + current stage chip + manual changer */}
      <div className="flex items-start justify-between flex-wrap gap-4 mb-4">
        <div className="flex items-center gap-3">
          <h2 className="text-navy text-base font-bold">סטטוס התיק</h2>
          {status && (
            <span className="rounded-full bg-warn-bg text-warn text-[0.8rem] font-bold px-3.5 py-1">
              כעת: {statusLabel(status)}
            </span>
          )}
        </div>
        {/* manual status changer — the SINGLE manual-status surface (INV-IA1) */}
        <StatusChanger caseNumber={caseNumber} currentStatus={status} inline />
      </div>

      {/* horizontal pipeline */}
      <HorizontalStepper status={status} />

      {/* meta strip below the stepper (mockup 18b .hero-meta) */}
      <div className="flex flex-wrap gap-x-8 gap-y-3 mt-5 pt-4 border-t border-rule-soft">
        <div className="flex flex-col">
          <span className="text-[0.72rem] text-ink-muted">תוצאה צפויה</span>
          <span className="text-sm font-semibold mt-0.5">
            {expectedOutcomeLabel ? (
              <span className="inline-block rounded-full bg-warn-bg text-warn text-[0.78rem] font-semibold px-2.5 py-0.5">
                {expectedOutcomeLabel}
              </span>
            ) : (
              <span className="text-ink-soft">לא נקבע</span>
            )}
          </span>
        </div>
        <div className="flex flex-col">
          <span className="text-[0.72rem] text-ink-muted">תאריך דיון</span>
          <span className="text-sm font-semibold text-ink-soft mt-0.5 tabular-nums">
            {formatDate(data?.hearing_date)}
          </span>
        </div>
        <div className="flex flex-col">
          <span className="text-[0.72rem] text-ink-muted">עודכן לאחרונה</span>
          <span className="text-sm font-semibold text-ink-soft mt-0.5 tabular-nums">
            {formatDate(data?.updated_at)}
          </span>
        </div>
      </div>

      {/* agents activity + status-map progressive disclosure (INV-IA6) */}
      <div className="mt-4 pt-4 border-t border-rule-soft space-y-3">
        <AgentStatusWidget caseNumber={caseNumber} />
        <StatusGuide />
      </div>
    </div>
  );
}