-- Sweepstakes/Lottery system
-- Tables: sweepstakes, sweepstake_prizes, sweepstake_entries, sweepstake_winners

-- Main sweepstakes table
CREATE TABLE IF NOT EXISTS sweepstakes (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,

    title VARCHAR(255) NOT NULL,
    description TEXT,
    image_url VARCHAR(500),
    rules_url VARCHAR(500),

    start_at TIMESTAMPTZ NOT NULL,
    end_at   TIMESTAMPTZ NOT NULL,
    status   VARCHAR(16) NOT NULL DEFAULT 'draft', -- draft|scheduled|active|locked|finalized|archived
    picker_style VARCHAR(16) NOT NULL DEFAULT 'wheel', -- wheel|cycler

    total_prizes INTEGER NOT NULL DEFAULT 1,
    prize_summary TEXT,

    winners_selected_at TIMESTAMPTZ,
    visibility_until TIMESTAMPTZ, -- set to end_at + 3 days at finalize
    draw_seed VARCHAR(64),
    max_entries_per_user INTEGER NOT NULL DEFAULT 1
);

CREATE INDEX IF NOT EXISTS idx_sweepstakes_status ON sweepstakes(status);
CREATE INDEX IF NOT EXISTS idx_sweepstakes_start ON sweepstakes(start_at);
CREATE INDEX IF NOT EXISTS idx_sweepstakes_end ON sweepstakes(end_at);

-- Prizes (per sweepstake)
CREATE TABLE IF NOT EXISTS sweepstake_prizes (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,

    sweepstake_id BIGINT NOT NULL REFERENCES sweepstakes(id) ON DELETE CASCADE,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    image_url VARCHAR(500),
    value VARCHAR(255),
    quantity INTEGER NOT NULL DEFAULT 1,
    display_order INTEGER NOT NULL DEFAULT 0
);
CREATE INDEX IF NOT EXISTS idx_prizes_sweepstake ON sweepstake_prizes(sweepstake_id);

-- Entries (unique per user per sweepstake)
CREATE TABLE IF NOT EXISTS sweepstake_entries (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,

    sweepstake_id BIGINT NOT NULL REFERENCES sweepstakes(id) ON DELETE CASCADE,
    user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    status VARCHAR(16) NOT NULL DEFAULT 'valid', -- valid|invalid|withdrawn
    ip_hash VARCHAR(64),
    visual_played_at TIMESTAMPTZ,
    view_count INTEGER NOT NULL DEFAULT 0,
    UNIQUE (sweepstake_id, user_id)
);
CREATE INDEX IF NOT EXISTS idx_entries_sweepstake ON sweepstake_entries(sweepstake_id);
CREATE INDEX IF NOT EXISTS idx_entries_user ON sweepstake_entries(user_id);

-- Winners (one per prize unit, unique winner per sweepstake)
CREATE TABLE IF NOT EXISTS sweepstake_winners (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,

    sweepstake_id BIGINT NOT NULL REFERENCES sweepstakes(id) ON DELETE CASCADE,
    entry_id BIGINT NOT NULL REFERENCES sweepstake_entries(id) ON DELETE CASCADE,
    user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    prize_id BIGINT REFERENCES sweepstake_prizes(id) ON DELETE SET NULL,
    prize_name VARCHAR(255), -- denormalized for safety
    announced_at TIMESTAMPTZ,
    notified_user_at TIMESTAMPTZ,
    notified_admin_at TIMESTAMPTZ,
    claim_status VARCHAR(16) NOT NULL DEFAULT 'pending', -- pending|claimed|delivered
    claim_note TEXT,
    UNIQUE (sweepstake_id, user_id)
);
CREATE INDEX IF NOT EXISTS idx_winners_sweepstake ON sweepstake_winners(sweepstake_id);
CREATE INDEX IF NOT EXISTS idx_winners_user ON sweepstake_winners(user_id);