"use client";

import { useMemo } from "react";
import Link from "next/link";
import { useQuery } from "@tanstack/react-query";

import { AppShell } from "@/components/app-shell";
import { Card } from "@/components/ui/card";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";
import { fetchScriptsCatalog } from "@/lib/api/scripts";

/*
 * /scripts — catalog of everything under scripts/, rendered as the
 * approved IA-redesign table (name mono · role · status chip · run/source
 * ghost button).
 *
 * The single source of truth is still `scripts/SCRIPTS.md` (CLAUDE.md mandates
 * updating it on every script change), served verbatim by
 * GET /api/scripts/catalog. We parse its markdown tables into structured rows
 * for display — editing remains git/Gitea only, so the per-row "מקור" button
 * deep-links to the file in Gitea rather than inventing a run-from-UI mutation.
 */

type ScriptStatus = "active" | "once" | "archive" | "deleted";

type ScriptRow = {
  name: string;
  role: string;
  status: ScriptStatus;
};

const STATUS_LABEL: Record<ScriptStatus, string> = {
  active: "פעיל",
  once: "חד-פעמי",
  archive: "ארכיון",
  deleted: "נמחק",
};

const STATUS_TONE: Record<ScriptStatus, { wrap: string; dot: string }> = {
  active: { wrap: "bg-success-bg text-success", dot: "bg-success" },
  once: { wrap: "bg-info-bg text-info", dot: "bg-info" },
  archive: { wrap: "bg-rule-soft text-ink-muted", dot: "bg-ink-muted" },
  deleted: { wrap: "bg-danger-bg text-danger", dot: "bg-danger" },
};

// "חד-פעמי" / "one-shot" markers inside the Scheduled column of an active row.
const ONCE_RE = /חד-?פעמי|one-?shot|בוצע/;

/**
 * Parse SCRIPTS.md markdown tables into typed rows. The file has three
 * sections with different shapes; we read the first two columns of each
 * (name + role) and derive status from the section + scheduling note.
 */
function parseScripts(md: string): ScriptRow[] {
  const lines = md.split("\n");
  const rows: ScriptRow[] = [];
  let section: ScriptStatus = "active";

  for (const raw of lines) {
    const line = raw.trim();
    if (line.startsWith("## ")) {
      if (line.includes(".archive") || line.includes("הושלמו")) section = "archive";
      else if (line.includes("נמחק")) section = "deleted";
      else section = "active";
      continue;
    }
    if (!line.startsWith("|")) continue;
    // skip header + separator rows
    const cells = line
      .split("|")
      .slice(1, -1)
      .map((c) => c.trim());
    if (cells.length < 2) continue;
    if (/^-+$/.test(cells[0].replace(/[-:]/g, "-"))) continue; // separator
    if (cells[0] === "Script") continue; // header
    if (!cells[0]) continue;

    const name = cells[0].replace(/`/g, "");
    if (!name) continue;

    let status: ScriptStatus = section;
    if (section === "active") {
      const scheduled = cells[3] ?? "";
      status = ONCE_RE.test(scheduled) ? "once" : "active";
    }
    // role: active = Purpose (col 2), archive = Original Purpose (col 1),
    // deleted = Reason (col 1).
    const role =
      section === "active" ? cells[2] ?? cells[1] ?? "" : cells[1] ?? "";

    rows.push({ name, role: stripMd(role), status });
  }
  return rows;
}

// Strip bold/inline-code markdown so the role reads as plain text in a cell.
function stripMd(s: string): string {
  return s.replace(/\*\*/g, "").replace(/`/g, "");
}

function StatusChip({ status }: { status: ScriptStatus }) {
  const tone = STATUS_TONE[status];
  return (
    <span
      className={`inline-flex items-center gap-1.5 rounded-full px-2.5 py-[3px] text-[0.75rem] font-semibold ${tone.wrap}`}
    >
      <span className={`h-1.5 w-1.5 rounded-full ${tone.dot}`} aria-hidden />
      {STATUS_LABEL[status]}
    </span>
  );
}

export default function ScriptsPage() {
  const { data, isLoading, isError, error } = useQuery({
    queryKey: ["scripts-catalog"],
    queryFn: ({ signal }) => fetchScriptsCatalog(signal),
  });

  const rows = useMemo(
    () => (data?.content ? parseScripts(data.content) : []),
    [data],
  );

  const lastModified =
    data?.last_modified != null
      ? new Date(data.last_modified * 1000).toLocaleDateString("he-IL", {
          year: "numeric",
          month: "long",
          day: "numeric",
        })
      : null;

  const giteaBase = data?.gitea_url ?? null;

  return (
    <AppShell>
      <section className="space-y-6">
        <header>
          <nav className="text-[0.78rem] text-ink-muted mb-1">
            <Link href="/" className="hover:text-gold-deep">בית</Link>
            <span aria-hidden> · </span>
            <span className="text-navy">סקריפטים</span>
          </nav>
          <h1 className="text-navy mb-0">סקריפטים</h1>
          <p className="text-sm text-ink-muted mt-1 max-w-2xl">
            סקריפטי-תחזוקה ותפעול. מקור-האמת הוא{" "}
            <code className="rounded bg-rule-soft px-1 py-0.5 font-mono text-[0.78rem]">
              scripts/SCRIPTS.md
            </code>{" "}
            — עריכה דרך git, לא מכאן.
          </p>
        </header>

        <div className="h-[2px] bg-gradient-to-l from-transparent via-gold to-transparent" />

        {isLoading ? (
          <Card className="bg-surface border-rule px-6 py-5 text-sm text-ink-muted">
            טוען קטלוג…
          </Card>
        ) : isError ? (
          <Card className="bg-danger-bg border-danger/40 px-6 py-5 text-sm text-danger">
            שגיאה בטעינת הקטלוג: {(error as Error)?.message ?? "לא ידוע"}
          </Card>
        ) : (
          <Card className="bg-surface border-rule shadow-sm overflow-hidden p-0">
            <Table>
              <TableHeader>
                <TableRow className="bg-parchment hover:bg-parchment border-rule">
                  <TableHead className="text-start text-[0.75rem] font-semibold text-ink-muted px-5 py-3.5">
                    שם הסקריפט
                  </TableHead>
                  <TableHead className="text-start text-[0.75rem] font-semibold text-ink-muted px-5 py-3.5">
                    תפקיד
                  </TableHead>
                  <TableHead className="text-start text-[0.75rem] font-semibold text-ink-muted px-5 py-3.5">
                    סטטוס
                  </TableHead>
                  <TableHead className="text-end text-[0.75rem] font-semibold text-ink-muted px-5 py-3.5">
                    פעולה
                  </TableHead>
                </TableRow>
              </TableHeader>
              <TableBody>
                {rows.map((s) => {
                  const disabled = s.status === "archive" || s.status === "deleted";
                  const href = giteaBase
                    ? `${giteaBase.replace(/\/$/, "")}/${s.name}`
                    : null;
                  return (
                    <TableRow
                      key={s.name}
                      className="border-rule-soft hover:bg-gold-wash align-middle"
                    >
                      <TableCell className="px-5 py-3.5">
                        <code
                          className="font-mono text-[0.81rem] font-semibold text-navy"
                          dir="ltr"
                        >
                          {s.name}
                        </code>
                      </TableCell>
                      <TableCell className="px-5 py-3.5 text-ink-soft text-[0.84rem] leading-snug max-w-xl whitespace-normal">
                        <span className="line-clamp-2">{s.role}</span>
                      </TableCell>
                      <TableCell className="px-5 py-3.5">
                        <StatusChip status={s.status} />
                      </TableCell>
                      <TableCell className="px-5 py-3.5 text-end">
                        {disabled || !href ? (
                          <button
                            type="button"
                            disabled
                            className="rounded-lg border border-rule-soft px-4 py-1.5 text-[0.81rem] font-semibold text-ink-muted cursor-default"
                          >
                            מקור
                          </button>
                        ) : (
                          <a
                            href={href}
                            target="_blank"
                            rel="noreferrer"
                            className="inline-block rounded-lg border border-rule px-4 py-1.5 text-[0.81rem] font-semibold text-gold-deep hover:bg-gold-wash hover:border-gold transition-colors"
                          >
                            מקור
                          </a>
                        )}
                      </TableCell>
                    </TableRow>
                  );
                })}
              </TableBody>
            </Table>
            {lastModified ? (
              <p className="px-5 py-3 border-t border-rule text-xs text-ink-muted">
                עודכן לאחרונה: {lastModified}
              </p>
            ) : null}
          </Card>
        )}
      </section>
    </AppShell>
  );
}