CREATE TABLE dumps (
  id          TEXT    PRIMARY KEY,
  kind        TEXT    NOT NULL,
  title       TEXT    NOT NULL,
  comment     TEXT,
  user_id     TEXT    NOT NULL,
  created_at  TEXT    NOT NULL,
  url         TEXT,
  rich_content TEXT,
  file_name   TEXT,
  file_mime   TEXT,
  file_size   INTEGER,
  vote_count  INTEGER NOT NULL DEFAULT 0,
  is_private  INTEGER NOT NULL DEFAULT 0,
  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

CREATE TABLE users (
  id            TEXT PRIMARY KEY,
  username      TEXT NOT NULL UNIQUE,
  password_hash TEXT NOT NULL,
  is_admin      INTEGER NOT NULL DEFAULT 0,
  created_at    TEXT NOT NULL,
  avatar_mime   TEXT
);

CREATE TABLE votes (
  dump_id    TEXT NOT NULL,
  user_id    TEXT NOT NULL,
  created_at TEXT NOT NULL,
  PRIMARY KEY (dump_id, user_id),
  FOREIGN KEY (dump_id)  REFERENCES dumps(id) ON DELETE CASCADE,
  FOREIGN KEY (user_id)  REFERENCES users(id) ON DELETE CASCADE
);

-- v2: playlists
CREATE TABLE playlists (
  id          TEXT    PRIMARY KEY,
  user_id     TEXT    NOT NULL,
  title       TEXT    NOT NULL,
  description TEXT,
  is_public   INTEGER NOT NULL DEFAULT 1,
  created_at  TEXT    NOT NULL,
  image_mime  TEXT,
  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

CREATE TABLE playlist_dumps (
  playlist_id TEXT    NOT NULL,
  dump_id     TEXT    NOT NULL,
  position    INTEGER NOT NULL,
  added_at    TEXT    NOT NULL,
  PRIMARY KEY (playlist_id, dump_id),
  FOREIGN KEY (playlist_id) REFERENCES playlists(id) ON DELETE CASCADE,
  FOREIGN KEY (dump_id)     REFERENCES dumps(id)     ON DELETE CASCADE
);

-- v3: comments
CREATE TABLE comments (
  id         TEXT    PRIMARY KEY,
  dump_id    TEXT    NOT NULL,
  user_id    TEXT    NOT NULL,
  parent_id  TEXT,
  body       TEXT    NOT NULL,
  created_at TEXT    NOT NULL,
  deleted    INTEGER NOT NULL DEFAULT 0,
  FOREIGN KEY (dump_id)   REFERENCES dumps(id)    ON DELETE CASCADE,
  FOREIGN KEY (user_id)   REFERENCES users(id)    ON DELETE CASCADE,
  FOREIGN KEY (parent_id) REFERENCES comments(id) ON DELETE CASCADE
);

CREATE INDEX idx_dumps_user           ON dumps(user_id);
CREATE INDEX idx_votes_user           ON votes(user_id);
CREATE INDEX idx_playlists_user       ON playlists(user_id);
CREATE INDEX idx_playlist_dumps_order ON playlist_dumps(playlist_id, position);
CREATE INDEX idx_playlist_dumps_dump  ON playlist_dumps(dump_id);
CREATE INDEX idx_comments_dump        ON comments(dump_id, created_at);