-- ===========================================================================
--  artalk-cf  ——  D1 / SQLite schema
--  执行：npx wrangler d1 execute artalk-cf --remote --file=./schema.sql
--  设计与 Artalk v2 的 gorm 模型对应，但时间统一存 unix 毫秒（INTEGER），
--  输出时再按 Asia/Shanghai 格式化成 "YYYY-MM-DD HH:mm:ss"。
-- ===========================================================================

CREATE TABLE IF NOT EXISTS sites (
  id          INTEGER PRIMARY KEY AUTOINCREMENT,
  name        TEXT    NOT NULL UNIQUE,
  urls        TEXT    NOT NULL DEFAULT '',   -- 逗号分隔
  created_at  INTEGER NOT NULL,
  updated_at  INTEGER NOT NULL
);

CREATE TABLE IF NOT EXISTS pages (
  id             INTEGER PRIMARY KEY AUTOINCREMENT,
  key            TEXT    NOT NULL,            -- Artalk 的 page_key，如 /20210911.html
  site_name      TEXT    NOT NULL,
  title          TEXT    NOT NULL DEFAULT '',
  admin_only     INTEGER NOT NULL DEFAULT 0,
  pv             INTEGER NOT NULL DEFAULT 0,
  vote_up        INTEGER NOT NULL DEFAULT 0,
  vote_down      INTEGER NOT NULL DEFAULT 0,
  accessible_url TEXT    NOT NULL DEFAULT '',
  created_at     INTEGER NOT NULL,
  updated_at     INTEGER NOT NULL
);
CREATE UNIQUE INDEX IF NOT EXISTS idx_pages_key_site ON pages (key, site_name);
CREATE INDEX IF NOT EXISTS idx_pages_site ON pages (site_name);

CREATE TABLE IF NOT EXISTS users (
  id             INTEGER PRIMARY KEY AUTOINCREMENT,
  name           TEXT    NOT NULL,
  email          TEXT    NOT NULL,
  link           TEXT    NOT NULL DEFAULT '',
  password       TEXT    NOT NULL DEFAULT '',  -- 空 = 无密码；支持 (pbkdf2) / (md5) / 明文(兼容)
  badge_name     TEXT    NOT NULL DEFAULT '',
  badge_color    TEXT    NOT NULL DEFAULT '',
  title_name     TEXT    NOT NULL DEFAULT '',  -- 头衔徽章（金色，优先级仅次于系统徽章）
  last_ip        TEXT    NOT NULL DEFAULT '',
  last_ua        TEXT    NOT NULL DEFAULT '',
  is_admin       INTEGER NOT NULL DEFAULT 0,
  receive_email  INTEGER NOT NULL DEFAULT 1,
  is_in_conf     INTEGER NOT NULL DEFAULT 0,
  token_valid_from INTEGER NOT NULL DEFAULT 0, -- 早于此刻签发的 token 失效（改密码后踢下线）
  created_at     INTEGER NOT NULL,
  updated_at     INTEGER NOT NULL
);
CREATE UNIQUE INDEX IF NOT EXISTS idx_users_name_email ON users (name, email);
CREATE INDEX IF NOT EXISTS idx_users_email ON users (email);

CREATE TABLE IF NOT EXISTS comments (
  id            INTEGER PRIMARY KEY AUTOINCREMENT,
  content       TEXT    NOT NULL,
  page_key      TEXT    NOT NULL,
  site_name     TEXT    NOT NULL,
  user_id       INTEGER NOT NULL,
  rid           INTEGER NOT NULL DEFAULT 0,   -- 直接父节点 id（0 = 顶层）
  root_id       INTEGER NOT NULL DEFAULT 0,   -- 顶层祖先 id（顶层为 0）
  is_collapsed  INTEGER NOT NULL DEFAULT 0,
  is_pending    INTEGER NOT NULL DEFAULT 0,
  is_pinned     INTEGER NOT NULL DEFAULT 0,
  is_verified   INTEGER NOT NULL DEFAULT 0,
  vote_up       INTEGER NOT NULL DEFAULT 0,
  vote_down     INTEGER NOT NULL DEFAULT 0,
  ua            TEXT    NOT NULL DEFAULT '',
  ip            TEXT    NOT NULL DEFAULT '',
  ip_region     TEXT    NOT NULL DEFAULT '',
  created_at    INTEGER NOT NULL,
  updated_at    INTEGER NOT NULL,
  deleted_at    INTEGER NOT NULL DEFAULT 0   -- 软删除，0 = 未删除
);
CREATE INDEX IF NOT EXISTS idx_comments_page ON comments (page_key, site_name, deleted_at);
CREATE INDEX IF NOT EXISTS idx_comments_root ON comments (root_id, deleted_at);
CREATE INDEX IF NOT EXISTS idx_comments_user ON comments (user_id, deleted_at);
CREATE INDEX IF NOT EXISTS idx_comments_created ON comments (created_at);
-- 列表/计数覆盖索引：原来列表要 ORDER BY is_pinned DESC, created_at DESC，
-- 没有匹配索引 → SQLite 每次全表扫 ~1000 行（实测列表 940 行/次、计数 1500-2000 行/次，
-- 是 D1 免费额度被打爆的主因）。带上这些列后只读命中行。
CREATE INDEX IF NOT EXISTS idx_comments_page_list
  ON comments (site_name, page_key, deleted_at, is_pending, is_pinned DESC, created_at DESC, id DESC);
-- 子评论拉取（root_id IN (...)）专用：让 SQLite 按 root_id seek，而不是扫整页
CREATE INDEX IF NOT EXISTS idx_comments_children
  ON comments (root_id, deleted_at, is_pending, created_at, id);
CREATE INDEX IF NOT EXISTS idx_comments_site_list
  ON comments (site_name, deleted_at, is_pending, created_at DESC, id DESC);

CREATE TABLE IF NOT EXISTS votes (
  id          INTEGER PRIMARY KEY AUTOINCREMENT,
  target_id   INTEGER NOT NULL,
  user_id     INTEGER NOT NULL,
  type        TEXT    NOT NULL,              -- 'comment' | 'page'
  created_at  INTEGER NOT NULL,
  updated_at  INTEGER NOT NULL
);
CREATE UNIQUE INDEX IF NOT EXISTS idx_votes_unique ON votes (target_id, user_id, type);

CREATE TABLE IF NOT EXISTS notifies (
  id          INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id     INTEGER NOT NULL,
  comment_id  INTEGER NOT NULL,
  is_read     INTEGER NOT NULL DEFAULT 0,
  is_emailed  INTEGER NOT NULL DEFAULT 0,
  created_at  INTEGER NOT NULL,
  updated_at  INTEGER NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_notifies_user ON notifies (user_id, is_read);

-- 键值配置：frontend_conf / admin_users / moderator / captcha / ip_region / ...
CREATE TABLE IF NOT EXISTS settings (
  key         TEXT PRIMARY KEY,
  value       TEXT NOT NULL,
  updated_at  INTEGER NOT NULL
);

-- 简单限流：按 IP + 动作统计，60 秒窗口
CREATE TABLE IF NOT EXISTS rate_limits (
  bucket      TEXT PRIMARY KEY,   -- 如 "comment:1.2.3.4"
  count       INTEGER NOT NULL DEFAULT 0,
  expires_at  INTEGER NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_rate_expires ON rate_limits (expires_at);

-- 验证码通过状态（按 IP 记，跨域请求带不上 cookie，所以放服务端）
CREATE TABLE IF NOT EXISTS captcha_passes (
  ip          TEXT PRIMARY KEY,
  expires_at  INTEGER NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_captcha_expires ON captcha_passes (expires_at);

-- 验证码题目：answer 只存哈希，防止有人直接读库
CREATE TABLE IF NOT EXISTS captcha_challenges (
  id          TEXT PRIMARY KEY,
  answer_hash TEXT NOT NULL,
  ip          TEXT NOT NULL,
  expires_at  INTEGER NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_captcha_ch_expires ON captcha_challenges (expires_at);