-- Initial database schema for Pawctioneer Bot
-- Supports all listing types: basic_auction, multi_slot_auction, fixed_price_listing, blind_auction

-- Enable foreign key constraints
PRAGMA foreign_keys = ON;

-- Core user tracking
CREATE TABLE users (
    id INTEGER PRIMARY KEY,
    telegram_id INTEGER UNIQUE NOT NULL,
    username TEXT,
    first_name TEXT,
    last_name TEXT,
    is_banned INTEGER DEFAULT 0,
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP
) STRICT;

CREATE INDEX idx_users_telegram_id ON users(telegram_id);
CREATE INDEX idx_users_username ON users(username);

-- Main listing table (handles all listing types)
CREATE TABLE listings (
    id INTEGER PRIMARY KEY,
    seller_id INTEGER NOT NULL,
    listing_type TEXT NOT NULL, -- 'basic_auction', 'multi_slot_auction', 'fixed_price_listing', 'blind_auction'
    title TEXT NOT NULL,
    description TEXT,
    currency_type TEXT NOT NULL, -- 'usd'

    -- Pricing (stored as INTEGER cents for USD)
    starting_bid INTEGER,
    buy_now_price INTEGER,
    min_increment INTEGER DEFAULT 100, -- 1.00 USD = 100 cents

    -- Multi-slot/fixed price
    slots_available INTEGER DEFAULT 1,

    -- Timing
    is_active INTEGER DEFAULT 1,
    starts_at TEXT DEFAULT CURRENT_TIMESTAMP,
    ends_at TEXT NOT NULL,
    anti_snipe_minutes INTEGER DEFAULT 5,

    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (seller_id) REFERENCES users(id)
) STRICT;

CREATE INDEX idx_listings_seller_id ON listings(seller_id);
CREATE INDEX idx_listings_type ON listings(listing_type);
CREATE INDEX idx_listings_ends_at ON listings(ends_at);

-- Proxy bid strategies (NOT actual bids, but bidding strategies)
CREATE TABLE proxy_bids (
    id INTEGER PRIMARY KEY,
    listing_id INTEGER NOT NULL,
    buyer_id INTEGER NOT NULL,
    max_amount INTEGER NOT NULL, -- stored as cents
    is_active INTEGER DEFAULT 1,

    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,

    FOREIGN KEY (listing_id) REFERENCES listings(id),
    FOREIGN KEY (buyer_id) REFERENCES users(id),
    UNIQUE(listing_id, buyer_id) -- One active proxy per user per listing
) STRICT;

CREATE INDEX idx_proxy_bids_listing_buyer ON proxy_bids(listing_id, buyer_id);

-- Actual bids that happened (events)
CREATE TABLE bids (
    id INTEGER PRIMARY KEY,
    listing_id INTEGER NOT NULL,
    buyer_id INTEGER NOT NULL,
    bid_amount INTEGER NOT NULL, -- stored as cents

    -- For blind listings
    description TEXT,

    -- Status
    is_cancelled INTEGER DEFAULT 0,
    slot_number INTEGER, -- For multi-slot listings

    -- NULL = manual bid, NOT NULL = generated from proxy
    proxy_bid_id INTEGER,

    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (listing_id) REFERENCES listings(id),
    FOREIGN KEY (buyer_id) REFERENCES users(id),
    FOREIGN KEY (proxy_bid_id) REFERENCES proxy_bids(id)
) STRICT;

CREATE INDEX idx_bids_listing_id ON bids(listing_id);
CREATE INDEX idx_bids_buyer_id ON bids(buyer_id);
CREATE INDEX idx_bids_amount ON bids(bid_amount);

-- Media attachments
CREATE TABLE listing_medias (
    id INTEGER PRIMARY KEY,
    listing_id INTEGER NOT NULL,
    telegram_file_id TEXT NOT NULL,
    media_type TEXT NOT NULL, -- 'photo', 'video'
    position INTEGER DEFAULT 0,
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (listing_id) REFERENCES listings(id)
) STRICT;

CREATE INDEX idx_listing_medias_listing_id ON listing_medias(listing_id);

-- User preferences
CREATE TABLE user_settings (
    user_id INTEGER PRIMARY KEY,
    language_code TEXT DEFAULT 'en',
    notify_outbid INTEGER DEFAULT 1,
    notify_won INTEGER DEFAULT 1,
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id)
) STRICT;

-- Message about a listing that were forwarded from the bot to a channel or user
CREATE TABLE forwarded_listings (
    id INTEGER PRIMARY KEY,
    listing_id INTEGER NOT NULL,
    telegram_message_id INTEGER NOT NULL,
    telegram_chat_id INTEGER NOT NULL,
    forwarding_user_id INTEGER NOT NULL,
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,

    FOREIGN KEY (listing_id) REFERENCES listings(id),
    FOREIGN KEY (forwarding_user_id) REFERENCES users(id)
) STRICT;

CREATE INDEX idx_forwarded_listings_listing_id ON forwarded_listings(listing_id);
CREATE INDEX idx_forwarded_listings_forwarding_user_id ON forwarded_listings(forwarding_user_id);