-- 相册元数据扩展字段
ALTER TABLE albums ADD COLUMN person_name_original TEXT;
ALTER TABLE albums ADD COLUMN person_name_cleaned TEXT;
ALTER TABLE albums ADD COLUMN tags TEXT;  -- JSON: [tag, ...]
ALTER TABLE albums ADD COLUMN all_words TEXT;  -- JSON: [[word, pos], ...]
ALTER TABLE albums ADD COLUMN raw_title TEXT;
ALTER TABLE albums ADD COLUMN processed_at TEXT;

-- 标签索引表（倒排索引）
CREATE TABLE IF NOT EXISTS album_tags (
    album_id TEXT NOT NULL,
    tag TEXT NOT NULL,
    PRIMARY KEY (album_id, tag),
    FOREIGN KEY (album_id) REFERENCES albums(id) ON DELETE CASCADE
);
CREATE INDEX IF NOT EXISTS idx_album_tags_tag ON album_tags(tag);

-- 人物表
CREATE TABLE IF NOT EXISTS persons (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL UNIQUE,
    display_name TEXT,
    total_albums INTEGER DEFAULT 0,
    total_images INTEGER DEFAULT 0,
    original_names TEXT,  -- JSON: [raw_name, ...]
    created_at TEXT DEFAULT (datetime('now', 'localtime')),
    updated_at TEXT DEFAULT (datetime('now', 'localtime'))
);
CREATE INDEX IF NOT EXISTS idx_persons_name ON persons(name);

-- 别名表
CREATE TABLE IF NOT EXISTS person_aliases (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    person_id INTEGER NOT NULL,
    alias_type TEXT NOT NULL,  -- prefix / english / nickname / chinese
    alias_name TEXT NOT NULL,
    created_at TEXT DEFAULT (datetime('now', 'localtime')),
    FOREIGN KEY (person_id) REFERENCES persons(id) ON DELETE CASCADE
);
CREATE INDEX IF NOT EXISTS idx_aliases_name ON person_aliases(alias_name);
CREATE INDEX IF NOT EXISTS idx_aliases_person ON person_aliases(person_id);

-- 人物-相册关联表
CREATE TABLE IF NOT EXISTS person_albums (
    person_id INTEGER NOT NULL,
    album_id TEXT NOT NULL,
    PRIMARY KEY (person_id, album_id),
    FOREIGN KEY (person_id) REFERENCES persons(id),
    FOREIGN KEY (album_id) REFERENCES albums(id)
);

CREATE INDEX IF NOT EXISTS idx_albums_cleaned ON albums(person_name_cleaned);