-- DeepRes initial schema
CREATE EXTENSION IF NOT EXISTS pgcrypto;

CREATE TABLE IF NOT EXISTS users (
    tg_id       BIGINT PRIMARY KEY,
    username    TEXT DEFAULT '',
    name        TEXT DEFAULT '',
    stars_balance INT DEFAULT 0,
    created_at  TIMESTAMPTZ DEFAULT now()
);

CREATE TABLE IF NOT EXISTS researches (
    id          UUID DEFAULT gen_random_uuid() PRIMARY KEY,
    tg_id       BIGINT REFERENCES users(tg_id) ON DELETE CASCADE,
    query       TEXT NOT NULL,
    mode        TEXT NOT NULL CHECK (mode IN ('fast', 'deep')),
    status      TEXT DEFAULT 'pending' CHECK (status IN ('pending', 'processing', 'done', 'failed')),
    stars_cost  INT DEFAULT 0,
    summary     TEXT,
    report_path TEXT,
    sources     JSONB,
    error_message TEXT,
    created_at  TIMESTAMPTZ DEFAULT now(),
    completed_at TIMESTAMPTZ
);

CREATE TABLE IF NOT EXISTS transactions (
    id          UUID DEFAULT gen_random_uuid() PRIMARY KEY,
    tg_id       BIGINT REFERENCES users(tg_id) ON DELETE CASCADE,
    amount      INT NOT NULL,
    type        TEXT NOT NULL CHECK (type IN ('purchase', 'research', 'bonus', 'refund')),
    description TEXT DEFAULT '',
    telegram_charge_id TEXT,
    created_at  TIMESTAMPTZ DEFAULT now()
);

CREATE INDEX IF NOT EXISTS idx_researches_tg_id ON researches(tg_id);
CREATE INDEX IF NOT EXISTS idx_researches_created_at ON researches(created_at);
CREATE INDEX IF NOT EXISTS idx_transactions_tg_id ON transactions(tg_id);