CREATE TABLE IF NOT EXISTS admins (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(64) NOT NULL UNIQUE,
    password VARCHAR(256) NOT NULL,
    name VARCHAR(64),
    email VARCHAR(128),
    phone VARCHAR(32),
    role VARCHAR(32) DEFAULT 'ADMIN',
    status VARCHAR(32) DEFAULT 'ACTIVE',
    last_login_time TIMESTAMP,
    last_login_ip VARCHAR(64),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS utterances (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    utterance_id VARCHAR(64) NOT NULL UNIQUE,
    corp_id VARCHAR(64) NOT NULL,
    title VARCHAR(128) NOT NULL,
    content TEXT NOT NULL,
    content_text TEXT,
    version INT DEFAULT 1,
    status VARCHAR(32) DEFAULT 'DRAFT',
    priority INT DEFAULT 5,
    stage_tags TEXT,
    intent_tags TEXT,
    profile_tags TEXT,
    course_type_tags TEXT,
    emotion_tags TEXT,
    topic_tags TEXT,
    used_count INT DEFAULT 0,
    selected_count INT DEFAULT 0,
    positive_feedback INT DEFAULT 0,
    negative_feedback INT DEFAULT 0,
    conversion_count INT DEFAULT 0,
    success_rate DECIMAL(5,4) DEFAULT 0.0000,
    avg_response_time_ms INT,
    has_vector TINYINT DEFAULT 0,
    vector_updated_at TIMESTAMP,
    trigger_keywords TEXT,
    variables TEXT,
    created_by VARCHAR(64),
    reviewed_by VARCHAR(64),
    source VARCHAR(32) DEFAULT 'MANUAL',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    deleted INT DEFAULT 0
);

CREATE TABLE IF NOT EXISTS knowledge_documents (
    id BIGINT AUTO_INCREMENT PRIMARY KEY,
    doc_id VARCHAR(64) NOT NULL UNIQUE,
    corp_id VARCHAR(64) NOT NULL,
    title VARCHAR(256) NOT NULL,
    content TEXT,
    content_text TEXT,
    doc_type VARCHAR(32),
    category VARCHAR(64),
    tags TEXT,
    status VARCHAR(32) DEFAULT 'ACTIVE',
    has_vector TINYINT DEFAULT 0,
    vector_updated_at TIMESTAMP,
    created_by VARCHAR(64),
    updated_by VARCHAR(64),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    deleted INT DEFAULT 0
);