CREATE TABLE durations (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    title VARCHAR(100) NOT NULL
);

CREATE TABLE plans (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(100),
    max_contacts BIGINT NOT NULL,
    daily_emails INT NOT NULL,
    ai_generation BOOLEAN NOT NULL,
    account_limit INT NOT NULL,
    price DECIMAL(10, 2) NOT NULL,
    discounted_price DECIMAL(10, 2) NOT NULL,
    duration_id UUID NOT NULL REFERENCES durations(id) ON DELETE CASCADE,
    savings SMALLINT,
    public BOOLEAN NOT NULL DEFAULT false,

    -- Stripe integration
    stripe_price_id VARCHAR(255),
    stripe_product_id VARCHAR(255),

    -- Organization limits
    max_campaigns INT,
    max_active_campaigns INT,
    max_team_members INT,
    max_email_accounts INT,

    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    CONSTRAINT valid_savings CHECK (savings BETWEEN 0 AND 100)
);

CREATE INDEX idx_plans_stripe_price ON plans(stripe_price_id);

CREATE TABLE offers (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    title VARCHAR(255) NOT NULL,
    description TEXT NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE offer_options (
    offer_id UUID NOT NULL REFERENCES offers(id) ON DELETE CASCADE,
    plan_id UUID NOT NULL REFERENCES plans(id) ON DELETE CASCADE,
    title VARCHAR(255) NOT NULL,

    PRIMARY KEY (offer_id, plan_id)
);

CREATE TABLE secret_plans (
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    plan_id UUID NOT NULL REFERENCES plans(id) ON DELETE CASCADE,

    PRIMARY KEY (user_id, plan_id)
);

-- Subscription status enum
CREATE TYPE subscription_status AS ENUM (
    'trialing',
    'active',
    'past_due',
    'canceled',
    'unpaid',
    'incomplete',
    'incomplete_expired',
    'paused'
);

CREATE TABLE subscriptions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    plan_id UUID NOT NULL REFERENCES plans(id) ON DELETE RESTRICT,

    -- Stripe identifiers
    stripe_customer_id VARCHAR(255) NOT NULL,
    stripe_subscription_id VARCHAR(255) UNIQUE,
    stripe_price_id VARCHAR(255),

    -- Subscription state
    status subscription_status NOT NULL DEFAULT 'incomplete',

    -- Billing period
    current_period_start TIMESTAMPTZ,
    current_period_end TIMESTAMPTZ,
    cancel_at_period_end BOOLEAN NOT NULL DEFAULT FALSE,
    canceled_at TIMESTAMPTZ,

    -- Trial info
    trial_start TIMESTAMPTZ,
    trial_end TIMESTAMPTZ,

    -- Enterprise flag - when true, uses user_rate_limits for custom limits
    is_enterprise BOOLEAN NOT NULL DEFAULT FALSE,

    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    CONSTRAINT unique_org_subscription UNIQUE (organization_id)
);

CREATE INDEX idx_subscriptions_stripe_customer ON subscriptions(stripe_customer_id);
CREATE INDEX idx_subscriptions_stripe_subscription ON subscriptions(stripe_subscription_id);
CREATE INDEX idx_subscriptions_status ON subscriptions(status);
CREATE INDEX idx_subscriptions_period_end ON subscriptions(current_period_end);
CREATE INDEX idx_subscriptions_org ON subscriptions(organization_id);

-- Stripe webhook events log for idempotency
CREATE TABLE stripe_webhook_events (
    id VARCHAR(255) PRIMARY KEY,
    event_type VARCHAR(100) NOT NULL,
    processed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    payload JSONB
);

CREATE INDEX idx_stripe_events_type ON stripe_webhook_events(event_type);
CREATE INDEX idx_stripe_events_processed ON stripe_webhook_events(processed_at);