#!/usr/bin/env node
import { readFile, writeFile } from 'node:fs/promises';
import { basename } from 'node:path';
import { fileURLToPath } from 'node:url';

const ALLOWED_TABLES = new Set([
  'puzzle_work_profile',
  'custom_world_profile',
  'match3d_work_profile',
  'square_hole_work_profile',
  'big_fish_work_profile',
  'visual_novel_work_profile',
]);

const WORK_TABLE_TYPES = {
  puzzle_work_profile: 'puzzle',
  custom_world_profile: 'customWorld',
  match3d_work_profile: 'match3d',
  square_hole_work_profile: 'squareHole',
  big_fish_work_profile: 'bigFish',
  visual_novel_work_profile: 'visualNovel',
};

const TABLE_OUTPUT_ORDER = [
  'puzzle_work_profile',
  'custom_world_profile',
  'match3d_work_profile',
  'square_hole_work_profile',
  'big_fish_work_profile',
  'visual_novel_work_profile',
];

const WORK_TYPES = ['puzzle', 'customWorld', 'match3d', 'squareHole', 'bigFish', 'visualNovel'];
const SHORT_TEXT_LIMIT = 120;
const LONG_TEXT_LIMIT = 500;
const SENSITIVE_PATTERN = /(token|secret|password|passwd|phone|wallet|credential|authorization|auth[_-]?key|api[_-]?key)/giu;

class StableMapper {
  constructor(prefix) {
    this.prefix = prefix;
    this.values = new Map();
  }

  map(value) {
    if (value === undefined || value === null || value === '') return value;
    const key = String(value);
    if (!this.values.has(key)) {
      this.values.set(
        key,
        `${this.prefix}-${String(this.values.size + 1).padStart(3, '0')}`,
      );
    }
    return this.values.get(key);
  }
}

function createContext() {
  return {
    user: new StableMapper('user'),
    session: new StableMapper('session'),
    author: new StableMapper('author'),
    authorCode: new StableMapper('author-code'),
    publicWorkCode: new StableMapper('public-work-code'),
    coverAsset: new StableMapper('asset'),
    work: new StableMapper('work'),
    profile: new StableMapper('profile'),
  };
}

function createWorkTypeBuckets() {
  return Object.fromEntries(WORK_TYPES.map((type) => [type, []]));
}

function unwrapSpacetimeOption(value) {
  if (
    value &&
    typeof value === 'object' &&
    !Array.isArray(value) &&
    Object.keys(value).length === 1
  ) {
    if (Object.prototype.hasOwnProperty.call(value, 'some')) return value.some;
    if (Object.prototype.hasOwnProperty.call(value, 'none')) return undefined;
  }
  return value;
}

function truncateText(value, limit) {
  if (value === undefined || value === null) return value;
  const text = String(value).replace(/\s+/g, ' ').trim();
  if (text.length <= limit) return text;
  return `${text.slice(0, limit)}…`;
}

function redactSensitiveText(value) {
  if (value === undefined || value === null) return value;
  return String(value).replace(SENSITIVE_PATTERN, '[redacted]');
}

function sanitizeCoverImageSrc(value) {
  const unwrapped = unwrapSpacetimeOption(value);
  if (unwrapped === undefined || unwrapped === null || unwrapped === '') return unwrapped;
  const text = String(unwrapped);
  if (text.startsWith('data:image/')) return '[redacted-data-image]';
  let withoutQuery = text.split('?')[0].split('#')[0];
  if (withoutQuery.length > 180) withoutQuery = `${withoutQuery.slice(0, 180)}…`;
  return withoutQuery;
}

function sanitizeLargeJson(value) {
  const unwrapped = unwrapSpacetimeOption(value);
  if (unwrapped === undefined || unwrapped === null) return unwrapped;
  if (typeof unwrapped === 'string') {
    return truncateText(redactSensitiveText(unwrapped), LONG_TEXT_LIMIT);
  }
  try {
    return truncateText(redactSensitiveText(JSON.stringify(unwrapped)), LONG_TEXT_LIMIT);
  } catch {
    return truncateText(redactSensitiveText(String(unwrapped)), LONG_TEXT_LIMIT);
  }
}

function firstDefined(row, keys) {
  for (const key of keys) {
    if (row[key] !== undefined && row[key] !== null) return row[key];
  }
  return undefined;
}

function sanitizeShortField(row, sanitized, key) {
  if (row[key] !== undefined) {
    sanitized[key] = truncateText(unwrapSpacetimeOption(row[key]), SHORT_TEXT_LIMIT);
  }
}

function sanitizeWorkRow(row, ctx) {
  const sanitized = {};
  const profileId = unwrapSpacetimeOption(firstDefined(row, ['profile_id', 'profileId']));
  const workId = unwrapSpacetimeOption(firstDefined(row, ['work_id', 'workId']));

  if (profileId !== undefined) sanitized.profile_id = ctx.profile.map(profileId);
  if (workId !== undefined) sanitized.work_id = ctx.work.map(workId);
  if (row.owner_user_id !== undefined) {
    sanitized.owner_user_id = ctx.user.map(unwrapSpacetimeOption(row.owner_user_id));
  }
  if (row.user_id !== undefined) sanitized.user_id = ctx.user.map(unwrapSpacetimeOption(row.user_id));

  if (row.author_display_name !== undefined) {
    sanitized.author_display_name = ctx.author.map(unwrapSpacetimeOption(row.author_display_name));
  }
  if (row.public_work_code !== undefined) {
    sanitized.public_work_code = ctx.publicWorkCode.map(unwrapSpacetimeOption(row.public_work_code));
  }
  if (row.author_public_user_code !== undefined) {
    sanitized.author_public_user_code = ctx.authorCode.map(
      unwrapSpacetimeOption(row.author_public_user_code),
    );
  }
  if (row.cover_asset_id !== undefined) {
    sanitized.cover_asset_id = ctx.coverAsset.map(unwrapSpacetimeOption(row.cover_asset_id));
  }
  if (row.cover_image_src !== undefined) sanitized.cover_image_src = sanitizeCoverImageSrc(row.cover_image_src);

  for (const key of [
    'title',
    'work_title',
    'level_name',
    'world_name',
    'summary',
    'summary_text',
    'description',
    'work_description',
    'subtitle',
  ]) {
    sanitizeShortField(row, sanitized, key);
  }

  for (const key of ['levels_json', 'profile_payload_json', 'anchor_pack_json', 'theme_tags_json']) {
    if (row[key] !== undefined) sanitized[key] = sanitizeLargeJson(row[key]);
  }

  const passthroughKeys = [
    'publication_status',
    'publicationStatus',
    'play_count',
    'playCount',
    'like_count',
    'likeCount',
    'remix_count',
    'remixCount',
    'updated_at',
    'created_at',
    'published_at',
    'visibility',
    'status',
    'category',
    'tags',
  ];
  for (const key of passthroughKeys) {
    if (row[key] !== undefined) sanitized[key] = unwrapSpacetimeOption(row[key]);
  }

  return sanitized;
}

function normalizeWork(tableName, row) {
  const type = WORK_TABLE_TYPES[tableName];
  return {
    type,
    workId: row.work_id,
    profileId: row.profile_id,
    ownerUserId: row.owner_user_id,
    publicWorkCode: row.public_work_code,
    title: row.title ?? row.work_title ?? row.level_name ?? row.world_name,
    subtitle: row.subtitle ?? row.summary_text ?? row.summary ?? row.work_description ?? row.description,
    publicationStatus: row.publicationStatus ?? row.publication_status ?? row.status,
    playCount: row.playCount ?? row.play_count ?? 0,
    likeCount: row.likeCount ?? row.like_count ?? 0,
    remixCount: row.remixCount ?? row.remix_count ?? 0,
    coverImageSrc: row.cover_image_src,
    updatedAt: row.updated_at,
  };
}

function toRowsByTable(input) {
  const tables = Array.isArray(input?.tables) ? input.tables : [];
  const result = new Map();
  for (const table of tables) {
    if (!ALLOWED_TABLES.has(table?.name)) continue;
    result.set(table.name, Array.isArray(table.rows) ? table.rows : []);
  }
  return result;
}

export function extractWorksListData(input, options = {}) {
  const ctx = createContext();
  const rowsByTable = toRowsByTable(input);
  const outputTables = {};
  const counts = {};
  const profileIds = createWorkTypeBuckets();
  const workIds = createWorkTypeBuckets();
  const normalizedWorks = [];

  for (const tableName of TABLE_OUTPUT_ORDER) {
    const sourceRows = rowsByTable.get(tableName);
    if (!sourceRows) continue;
    const sanitizedRows = sourceRows.map((row) => sanitizeWorkRow(row, ctx));
    outputTables[tableName] = sanitizedRows;
    counts[tableName] = sanitizedRows.length;

    const type = WORK_TABLE_TYPES[tableName];
    if (type) {
      for (const row of sanitizedRows) {
        if (row.profile_id) profileIds[type].push(row.profile_id);
        if (row.work_id) workIds[type].push(row.work_id);
        normalizedWorks.push(normalizeWork(tableName, row));
      }
    }
  }

  return {
    source: options.source ?? 'unknown',
    generatedAt: options.generatedAt ?? new Date().toISOString(),
    counts,
    tables: outputTables,
    profileIds,
    workIds,
    normalizedWorks,
  };
}

function createSampleOutput(output, maxRowsPerTable = 3) {
  const tables = {};
  const counts = {};
  const allowedWorkIds = new Set();
  const allowedProfileIds = new Set();

  for (const [tableName, rows] of Object.entries(output.tables)) {
    tables[tableName] = rows.slice(0, maxRowsPerTable);
    counts[tableName] = tables[tableName].length;
    const type = WORK_TABLE_TYPES[tableName];
    if (type) {
      for (const row of tables[tableName]) {
        if (row.work_id) allowedWorkIds.add(row.work_id);
        if (row.profile_id) allowedProfileIds.add(row.profile_id);
      }
    }
  }

  const profileIds = Object.fromEntries(
    Object.entries(output.profileIds).map(([type, ids]) => [
      type,
      ids.filter((id) => allowedProfileIds.has(id)).slice(0, maxRowsPerTable),
    ]),
  );
  const workIds = Object.fromEntries(
    Object.entries(output.workIds).map(([type, ids]) => [
      type,
      ids.filter((id) => allowedWorkIds.has(id)).slice(0, maxRowsPerTable),
    ]),
  );
  const normalizedWorks = output.normalizedWorks
    .filter((work) => allowedWorkIds.has(work.workId) || allowedProfileIds.has(work.profileId))
    .slice(0, maxRowsPerTable * 6);

  return {
    ...output,
    counts,
    tables,
    profileIds,
    workIds,
    normalizedWorks,
  };
}

function parseArgs(argv) {
  const args = {};
  for (let index = 0; index < argv.length; index += 1) {
    const arg = argv[index];
    if (arg === '--input' || arg === '--output' || arg === '--sample-output') {
      const value = argv[index + 1];
      if (!value || value.startsWith('--')) throw new Error(`${arg} requires a value`);
      args[arg.slice(2)] = value;
      index += 1;
    } else if (arg === '--help' || arg === '-h') {
      args.help = true;
    } else {
      throw new Error(`Unknown argument: ${arg}`);
    }
  }
  return args;
}

function usage() {
  return 'Usage: node scripts/loadtest/extract-works-list-data.mjs --input <migration.json> --output <works-list.local.json> [--sample-output <works-list.sample.json>]';
}

export async function runCli(argv = process.argv.slice(2)) {
  const args = parseArgs(argv);
  if (args.help) {
    console.log(usage());
    return;
  }
  if (!args.input) throw new Error('Missing required --input. ' + usage());
  if (!args.output) throw new Error('Missing required --output. ' + usage());

  const raw = await readFile(args.input, 'utf8');
  const migration = JSON.parse(raw);
  const output = extractWorksListData(migration, { source: basename(args.input) });
  await writeFile(args.output, `${JSON.stringify(output, null, 2)}\n`, 'utf8');

  if (args['sample-output']) {
    const sample = createSampleOutput(output);
    await writeFile(args['sample-output'], `${JSON.stringify(sample, null, 2)}\n`, 'utf8');
  }

  console.log(
    `works-list extracted: source=${output.source}, tables=${Object.keys(output.tables).length}, normalizedWorks=${output.normalizedWorks.length}`,
  );
  for (const [tableName, count] of Object.entries(output.counts)) {
    console.log(`  ${tableName}: ${count}`);
  }
}

const isDirectRun = process.argv[1] && fileURLToPath(import.meta.url) === process.argv[1];
if (isDirectRun) {
  runCli().catch((error) => {
    console.error(error instanceof Error ? error.message : String(error));
    process.exitCode = 1;
  });
}