-- Telegram Helper Bot Database Schema
-- Compatible with Docker container deployment

-- IMPORTANT: Enable foreign key support after each database connection
-- PRAGMA foreign_keys = ON;

-- Note: sqlite_sequence table is automatically created by SQLite for AUTOINCREMENT fields
-- No need to create it manually

-- Users who have listened to audio messages
CREATE TABLE IF NOT EXISTS user_audio_listens (
    file_name TEXT NOT NULL,
    user_id INTEGER NOT NULL,
    PRIMARY KEY (file_name, user_id),
    FOREIGN KEY (user_id) REFERENCES our_users(user_id) ON DELETE CASCADE
);

-- Reference table for audio messages
CREATE TABLE IF NOT EXISTS audio_message_reference (
    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
    file_name TEXT NOT NULL UNIQUE,
    author_id INTEGER NOT NULL,
    date_added INTEGER NOT NULL,
    FOREIGN KEY (author_id) REFERENCES our_users(user_id) ON DELETE CASCADE
);

-- Bot administrators
CREATE TABLE IF NOT EXISTS admins (
    user_id INTEGER NOT NULL PRIMARY KEY,
    role TEXT,
    FOREIGN KEY (user_id) REFERENCES our_users(user_id) ON DELETE CASCADE
);

-- User blacklist for banned users
CREATE TABLE IF NOT EXISTS blacklist (
    user_id INTEGER NOT NULL PRIMARY KEY,
    message_for_user TEXT,
    date_to_unban INTEGER,
    created_at INTEGER DEFAULT (strftime('%s', 'now')),
    FOREIGN KEY (user_id) REFERENCES our_users(user_id) ON DELETE CASCADE
);

-- User message history
CREATE TABLE IF NOT EXISTS user_messages (
    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
    message_text TEXT,
    user_id INTEGER,
    telegram_message_id INTEGER NOT NULL,
    date INTEGER NOT NULL,
    FOREIGN KEY (user_id) REFERENCES our_users(user_id) ON DELETE CASCADE
);

-- Suggested posts from Telegram
CREATE TABLE IF NOT EXISTS post_from_telegram_suggest (
    message_id INTEGER NOT NULL PRIMARY KEY,
    text TEXT,
    helper_text_message_id INTEGER,
    author_id INTEGER,
    created_at INTEGER NOT NULL,
    status TEXT NOT NULL DEFAULT 'suggest',
    is_anonymous INTEGER,
    FOREIGN KEY (author_id) REFERENCES our_users(user_id) ON DELETE CASCADE
);

-- Links between posts and content
CREATE TABLE IF NOT EXISTS message_link_to_content (
    post_id INTEGER NOT NULL,
    message_id INTEGER NOT NULL,
    PRIMARY KEY (post_id, message_id),
    FOREIGN KEY (post_id) REFERENCES post_from_telegram_suggest(message_id) ON DELETE CASCADE
);

-- Content associated with Telegram posts
CREATE TABLE IF NOT EXISTS content_post_from_telegram (
    message_id INTEGER NOT NULL,
    content_name TEXT NOT NULL,
    content_type TEXT,
    PRIMARY KEY (message_id, content_name),
    FOREIGN KEY (message_id) REFERENCES post_from_telegram_suggest(message_id) ON DELETE CASCADE
);

-- Bot users information (user_id is now PRIMARY KEY)
CREATE TABLE IF NOT EXISTS our_users (
    user_id INTEGER NOT NULL PRIMARY KEY,
    first_name TEXT,
    full_name TEXT,
    username TEXT,
    is_bot BOOLEAN DEFAULT 0,
    language_code TEXT,
    has_stickers BOOLEAN DEFAULT 0 NOT NULL,
    emoji TEXT,
    date_added INTEGER NOT NULL,
    date_changed INTEGER NOT NULL,
    voice_bot_welcome_received BOOLEAN DEFAULT 0
);

-- Audio moderation tracking
CREATE TABLE IF NOT EXISTS audio_moderate (
    user_id INTEGER NOT NULL,
    message_id INTEGER,
    PRIMARY KEY (user_id, message_id),
    FOREIGN KEY (user_id) REFERENCES our_users(user_id) ON DELETE CASCADE
);

-- Create indexes for better performance
-- Optimized index for user_audio_listens - only user_id for "show all audio listened by user X"
CREATE INDEX IF NOT EXISTS idx_user_audio_listens_user_id ON user_audio_listens(user_id);
CREATE INDEX IF NOT EXISTS idx_audio_message_reference_author_id ON audio_message_reference(author_id);
CREATE INDEX IF NOT EXISTS idx_user_messages_user_id ON user_messages(user_id);
CREATE INDEX IF NOT EXISTS idx_post_from_telegram_suggest_author_id ON post_from_telegram_suggest(author_id);
CREATE INDEX IF NOT EXISTS idx_blacklist_date_to_unban ON blacklist(date_to_unban);
CREATE INDEX IF NOT EXISTS idx_user_messages_date ON user_messages(date);
CREATE INDEX IF NOT EXISTS idx_audio_message_reference_date ON audio_message_reference(date_added);
CREATE INDEX IF NOT EXISTS idx_post_from_telegram_suggest_date ON post_from_telegram_suggest(created_at);
CREATE INDEX IF NOT EXISTS idx_our_users_date_changed ON our_users(date_changed);