#!/usr/bin/env npx tsx
/**
 * tokyo-livehouse-events の events.db から全出演者を取得し、
 * whois-band に自動登録するスクリプト。
 *
 * Usage:
 *   npx tsx scripts/import-livehouse-events.ts
 *
 * Optional env vars:
 *   DB_PATH          whois.db のパス (default: /app/whois-band/data/whois.db)
 *   EVENTS_DB_PATH   events.db のパス (default: /app/tokyo-livehouse-events/data/events.db)
 *   DRY_RUN=1        登録せず結果だけ表示
 */

import Database from "better-sqlite3";
import { randomUUID } from "crypto";
import path from "path";
import { fileURLToPath } from "url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));

const WHOIS_DB_PATH = process.env.DB_PATH ?? "/app/whois-band/data/whois.db";
const EVENTS_DB_PATH = process.env.EVENTS_DB_PATH ?? "/app/tokyo-livehouse-events/data/events.db";
const DRY_RUN = process.env.DRY_RUN === "1";

// ── Artist name parser ────────────────────────────────────────────────────────

const NOISE_WORDS = new Set([
  "tour", "presents", "present", "and", "feat", "feat.", "with", "guest",
  "vs", "vs.", "×", "starring",
]);

const NOISE_PATTERNS = [
  /\d{1,2}:\d{2}/,           // time HH:MM
  /^[\d\s\/\-\.]+$/,         // numbers/dates/slashes only
  /\.(com|net|jp|org)\b/i,   // domain names
  /^(OPEN|START|ADV|DOOR)/i, // ticket info
  /^(出演|単独公演|二日間|開催|開場|ゲスト)/,
];

function isNoise(name: string): boolean {
  const trimmed = name.trim();
  if (!trimmed || trimmed.length < 2 || trimmed.length > 60) return true;
  if (NOISE_WORDS.has(trimmed.toLowerCase())) return true;
  return NOISE_PATTERNS.some((re) => re.test(trimmed));
}

/**
 * Remove all balanced parenthetical content from a string.
 * e.g. "KENNY DOPE (MASTERS AT WORK)" → "KENNY DOPE"
 * e.g. "MyM (Miyuki・Yoshiko・Mahiru)" → "MyM"
 * Keeps the content if there's nothing else left (entire string is in parens).
 */
function stripParens(s: string): string {
  let result = s;
  // Strip standard round parens and their Japanese variants
  result = result.replace(/[\(（][^）)）]*[\)）]/g, "");
  // Strip any leftover unmatched parens
  result = result.replace(/[\(（（）)）]/g, "");
  const stripped = result.trim();
  // Fall back to original if nothing remains
  return stripped.length >= 2 ? stripped : s.trim();
}

/**
 * Find indices of top-level "/" separators (not inside parens).
 */
function findTopLevelSlashes(s: string): number[] {
  const positions: number[] = [];
  let depth = 0;
  for (let i = 0; i < s.length; i++) {
    const ch = s[i];
    if (ch === "(" || ch === "（") depth++;
    else if (ch === ")" || ch === "）") depth = Math.max(0, depth - 1);
    else if (ch === "/" && depth === 0) positions.push(i);
  }
  return positions;
}

function splitOnTopLevelSlash(s: string): string[] {
  const slashes = findTopLevelSlashes(s);
  if (slashes.length === 0) return [s];

  const parts: string[] = [];
  let last = 0;

  // Handle "//" (double slash) as a single separator
  const merged: number[] = [];
  for (let i = 0; i < slashes.length; i++) {
    if (i > 0 && slashes[i] === slashes[i - 1] + 1) continue; // skip second of "//"
    merged.push(slashes[i]);
    // If next slash is consecutive, advance last by 2 after processing
  }

  for (const pos of merged) {
    const part = s.slice(last, pos).trim();
    if (part) parts.push(part);
    // Skip consecutive slash (for "//")
    last = (s[pos + 1] === "/") ? pos + 2 : pos + 1;
  }
  const tail = s.slice(last).trim();
  if (tail) parts.push(tail);
  return parts;
}

function extractNames(raw: string): string[] {
  let s = raw;

  // 1. Replace venue markers like =O-EAST= =AZUMAYA= with "/" so they act as separators
  s = s.replace(/=([^=]+)=\s*/g, " / ");

  // 2. Strip bracket blocks [members] <detail> 【...】 ［...］
  s = s.replace(/[\[【＜<［][^\]】＞>］]*[\]】＞>］]/g, "");

  // 3. Strip "ARTIST Presents EVENT" → keep only ARTIST
  //    (match " presents " followed by text until "/" or end)
  s = s.replace(/\s+[Pp]resents\s+"?[^/"、/]+/g, "");
  s = s.replace(/\s+[Pp]resent\s+"?[^/"、/]+/g, "");

  // 4. Split on top-level "/" (not inside parens), then on 「、」
  const slashParts = splitOnTopLevelSlash(s);

  const allParts: string[] = [];
  for (const part of slashParts) {
    // Further split on 「、」 (Japanese comma) — this is always a top-level separator
    const jpParts = part.split(/[、]/).map((p) => p.trim()).filter(Boolean);
    allParts.push(...jpParts);
  }

  // 5. Clean each part
  return allParts
    .map((name) => {
      // Remove trailing parenthetical content (label names, member lists, roles)
      let cleaned = stripParens(name);
      // Remove leading/trailing punctuation noise
      cleaned = cleaned
        .replace(/^[「」『』【】〈〉《》\[\]"'・\s]+/, "")
        .replace(/[「」『』【】〈〉《》\[\]"'・\s]+$/, "")
        .trim();
      return cleaned;
    })
    .filter((name) => !isNoise(name));
}

// ── DB helpers ────────────────────────────────────────────────────────────────

function toSlug(name: string): string {
  return name
    .trim()
    .toLowerCase()
    .replace(/\s+/g, "-")
    .replace(/[^\w぀-ヿ一-鿿＀-￯-]/g, "")
    .replace(/^-+|-+$/g, "");
}

interface Band { id: string; name: string; slug: string; }

function insertBand(db: Database.Database, name: string): string {
  const id = randomUUID();
  const baseSlug = toSlug(name) || id.slice(0, 8);

  for (let attempt = 0; attempt < 3; attempt++) {
    const slug = attempt === 0 ? baseSlug : `${baseSlug}-${id.slice(0, 6)}`;
    try {
      db.transaction(() => {
        db.prepare(
          "INSERT INTO bands (id, slug, name, area, description, status) VALUES (?, ?, ?, ?, ?, ?)"
        ).run(id, slug, name, null, null, "active");

        const band = db.prepare("SELECT * FROM bands WHERE id = ?").get(id);
        db.prepare(
          "INSERT INTO band_revisions (id, band_id, snapshot, message, ip_address) VALUES (?, ?, ?, ?, ?)"
        ).run(
          randomUUID(),
          id,
          JSON.stringify({ band, links: [], members: [] }),
          "tokyo-livehouse-events から自動インポート",
          "cli-import"
        );
      })();
      return id;
    } catch (e) {
      if (e instanceof Error && e.message.includes("UNIQUE constraint failed")) continue;
      throw e;
    }
  }
  throw new Error(`スラッグ競合で登録失敗: ${name}`);
}

// ── Main ──────────────────────────────────────────────────────────────────────

async function main() {
  console.log("=== tokyo-livehouse-events → whois-band インポーター ===");
  console.log(`events DB: ${EVENTS_DB_PATH}`);
  console.log(`whois DB:  ${WHOIS_DB_PATH}`);
  if (DRY_RUN) console.log("⚠️  DRY_RUN モード（登録しません）");
  console.log();

  // 1. events.db から全出演者文字列を取得
  const eventsDb = new Database(EVENTS_DB_PATH, { readonly: true });
  const artistRows = eventsDb
    .prepare("SELECT DISTINCT artist FROM events WHERE artist IS NOT NULL AND artist != ''")
    .all() as { artist: string }[];
  eventsDb.close();

  console.log(`出演者フィールド数: ${artistRows.length}`);

  // 2. 全名前を抽出・重複排除（スラッグで判定）
  const extracted = new Map<string, string>(); // slug → name (最初に出現したものを採用)
  for (const { artist } of artistRows) {
    for (const name of extractNames(artist)) {
      const slug = toSlug(name);
      if (slug && !extracted.has(slug)) {
        extracted.set(slug, name);
      }
    }
  }

  console.log(`抽出したユニーク名（スラッグ重複排除後）: ${extracted.size}`);

  // 3. whois.db を開いて既存バンドと照合
  const whoisDb = new Database(WHOIS_DB_PATH);
  whoisDb.pragma("journal_mode = WAL");
  whoisDb.pragma("foreign_keys = ON");

  const existingBands = whoisDb
    .prepare("SELECT id, name, slug FROM bands")
    .all() as Band[];
  const existingSlugs = new Set(existingBands.map((b) => b.slug));
  const existingNames = new Set(existingBands.map((b) => b.name.toLowerCase()));

  console.log(`既存バンド数: ${existingBands.length}\n`);

  const toRegister: string[] = [];
  const skipped: string[] = [];

  for (const [slug, name] of extracted) {
    if (existingSlugs.has(slug) || existingNames.has(name.toLowerCase())) {
      skipped.push(name);
    } else {
      toRegister.push(name);
    }
  }

  console.log(`新規登録対象: ${toRegister.length}件`);
  console.log(`既存スキップ: ${skipped.length}件\n`);

  if (DRY_RUN) {
    console.log("=== ドライランサマリ ===");
    console.log("登録予定バンド（先頭100件）:");
    toRegister.slice(0, 100).forEach((n) => console.log(`  + ${n}`));
    if (toRegister.length > 100) console.log(`  ... 他 ${toRegister.length - 100} 件`);
    return;
  }

  // 4. 登録
  let registered = 0;
  let errors = 0;

  for (const name of toRegister) {
    try {
      insertBand(whoisDb, name);
      registered++;
      if (registered % 100 === 0) {
        process.stdout.write(`  ... ${registered}件登録済\n`);
      }
    } catch (e) {
      console.error(`  ❌ "${name}": ${e instanceof Error ? e.message : e}`);
      errors++;
    }
  }

  whoisDb.close();

  console.log("\n=== 結果サマリ ===");
  console.log(`登録完了: ${registered}件`);
  console.log(`スキップ（既存）: ${skipped.length}件`);
  if (errors > 0) console.log(`エラー: ${errors}件`);

  const finalCount = whoisDb
    ? 0
    : (() => {
        const db2 = new Database(WHOIS_DB_PATH, { readonly: true });
        const c = (db2.prepare("SELECT COUNT(*) as c FROM bands").get() as { c: number }).c;
        db2.close();
        return c;
      })();

  const db2 = new Database(WHOIS_DB_PATH, { readonly: true });
  const finalTotal = (db2.prepare("SELECT COUNT(*) as c FROM bands").get() as { c: number }).c;
  db2.close();
  console.log(`DBのバンド総数: ${finalTotal}件`);
}

main().catch((e) => { console.error(e); process.exit(1); });