"use client";

import {
  PHASES,
  phaseIndexOf,
  phaseOf,
  type CaseStatus,
} 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 { SyncIndicator } from "@/components/cases/sync-indicator";
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from "@/components/ui/popover";
import { expectedOutcomes } from "@/lib/schemas/case";
import { formatDate } from "@/lib/format-date";
import { Settings2, Users } from "lucide-react";
import type { CaseDetail } from "@/lib/api/cases";

/*
 * StatusRail — the integrated case-status strip that lives inside the parchment
 * band (CaseHeader), so it is visible on EVERY tab (banner "A", X17 case-detail
 * redesign — supersedes the overview-only StatusHero). One thin row of chips
 * (current phase · expected outcome · meta · agents popover · manual changer)
 * over the 5-phase pipeline stepper. Reuses the shared StatusChanger / StatusGuide
 * / 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]),
);

/** Semantic colour per expected-outcome value (rejection/partial/full/none). */
const OUTCOME_TONE: Record<string, string> = {
  rejection: "bg-danger-bg text-danger",
  partial_acceptance: "bg-warn-bg text-warn",
  full_acceptance: "bg-success-bg text-success",
};

/** Horizontal RTL stepper over the 5 lifecycle phases (mockup A .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";

        const segTone = state === "done" ? "bg-success" : "bg-rule";

        return (
          <li key={phase.key} className="relative flex-1 pt-6 text-center">
            {!isLast && (
              <span
                className={`absolute top-[7px] h-0.5 w-full ${segTone}`}
                style={{ insetInlineStart: "50%" }}
                aria-hidden
              />
            )}
            <span
              className={`absolute top-[2px] h-3.5 w-3.5 rounded-full border-[2.5px] border-surface ${knobTone}`}
              style={{ insetInlineStart: "50%", transform: "translateX(50%)" }}
              aria-hidden
            />
            <span className={`block text-[0.74rem] ${labelTone}`}>
              {phase.label}
            </span>
          </li>
        );
      })}
    </ol>
  );
}

const PILL =
  "inline-flex items-center gap-1.5 rounded-full border border-rule bg-surface px-3 py-1 text-[0.72rem] font-semibold text-ink-soft hover:bg-parchment transition-colors";

export function StatusRail({
  caseNumber,
  data,
}: {
  caseNumber: string;
  data?: CaseDetail;
}) {
  const status = data?.status;
  const phaseKey = phaseOf(status);
  const phaseLabel = phaseKey
    ? PHASES.find((p) => p.key === phaseKey)?.label
    : null;
  const outcome = data?.expected_outcome ?? "";
  const outcomeLabel = outcome
    ? EXPECTED_OUTCOME_LABELS[outcome] ?? outcome
    : null;
  const outcomeTone = outcome
    ? OUTCOME_TONE[outcome] ?? "bg-warn-bg text-warn"
    : "bg-rule-soft text-ink-muted";

  return (
    <div className="mt-3 border-t border-rule-soft pt-3">
      {/* chip row */}
      <div className="flex items-center gap-x-3 gap-y-2 flex-wrap mb-3">
        <span className="text-navy text-[0.8rem] font-bold me-1">סטטוס</span>
        {phaseLabel && (
          <span className="rounded-full bg-warn-bg text-warn text-[0.78rem] font-bold px-3 py-1">
            כעת: {phaseLabel}
          </span>
        )}
        <span className="inline-flex items-center gap-1.5">
          <span className="text-[0.72rem] text-ink-muted">תוצאה צפויה:</span>
          <span
            className={`inline-block rounded-full text-[0.74rem] font-semibold px-2.5 py-0.5 ${outcomeTone}`}
          >
            {outcomeLabel ?? "טרם נקבעה"}
          </span>
        </span>

        <span className="flex-1" />

        <span className="flex items-center gap-3 text-[0.72rem] text-ink-muted">
          <span>
            דיון{" "}
            <b className="text-ink-soft font-semibold tabular-nums">
              {formatDate(data?.hearing_date)}
            </b>
          </span>
          <span>
            עודכן{" "}
            <b className="text-ink-soft font-semibold tabular-nums">
              {formatDate(data?.updated_at)}
            </b>
          </span>
          <span className="inline-flex items-center gap-1">
            סנכרון <SyncIndicator caseNumber={data?.case_number} />
          </span>
        </span>

        {/* agents popover */}
        <Popover>
          <PopoverTrigger asChild>
            <button type="button" className={PILL} title="סוכני התיק">
              <span className="h-1.5 w-1.5 rounded-full bg-success" />
              <Users className="w-3.5 h-3.5" />
              סוכנים
            </button>
          </PopoverTrigger>
          <PopoverContent align="end" className="w-80 p-3">
            <AgentStatusWidget caseNumber={caseNumber} />
          </PopoverContent>
        </Popover>

        {/* manual status changer + status guide popover */}
        <Popover>
          <PopoverTrigger asChild>
            <button type="button" className={PILL} title="שינוי סטטוס ידני">
              <Settings2 className="w-3.5 h-3.5" />
              שינוי
            </button>
          </PopoverTrigger>
          <PopoverContent align="end" className="w-72 p-3 space-y-3">
            <div className="text-[0.72rem] font-semibold text-ink-muted">
              שינוי סטטוס ידני
            </div>
            <StatusChanger caseNumber={caseNumber} currentStatus={status} inline />
            <StatusGuide />
          </PopoverContent>
        </Popover>
      </div>

      {/* pipeline */}
      <HorizontalStepper status={status} />
    </div>
  );
}