-- ==========================================================
-- Mak Chat - Reactions, Reply, Pin, Star Schema
-- ஏற்கனவே இருக்கும் Database-லேயே இதை Import செய்யவும்
-- ==========================================================

ALTER TABLE messages
    ADD COLUMN reply_to_id INT NULL AFTER conversation_id,
    ADD COLUMN is_pinned TINYINT(1) NOT NULL DEFAULT 0 AFTER is_deleted,
    ADD COLUMN is_starred TINYINT(1) NOT NULL DEFAULT 0 AFTER is_pinned;

-- Message Reactions (எந்த Message-க்கு யார் என்ன Emoji கொடுத்தாங்க)
CREATE TABLE IF NOT EXISTS message_reactions (
    id INT AUTO_INCREMENT PRIMARY KEY,
    message_id INT NOT NULL,
    user_id INT NOT NULL,
    emoji VARCHAR(10) NOT NULL,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    UNIQUE KEY unique_reaction (message_id, user_id),
    FOREIGN KEY (message_id) REFERENCES messages(id) ON DELETE CASCADE,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;