-- IP WhiteList schema

CREATE TABLE IF NOT EXISTS companies (
    id            SERIAL PRIMARY KEY,
    client_id     VARCHAR(64) UNIQUE NOT NULL,
    name          VARCHAR(255),
    custom_limit  INTEGER DEFAULT NULL CHECK (custom_limit IS NULL OR custom_limit >= 0),
    owner_email   TEXT DEFAULT NULL,
    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS whitelist_entries (
    id           SERIAL PRIMARY KEY,
    company_id   INTEGER NOT NULL REFERENCES companies(id) ON DELETE RESTRICT,
    value_cidr   VARCHAR(18) NOT NULL CHECK (value_cidr ~ '^(\d{1,3}\.){3}\d{1,3}/\d{1,2}$'),
    comment      VARCHAR(255),
    created_by   VARCHAR(255) NOT NULL,
    created_at   TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_by   VARCHAR(255),
    updated_at   TIMESTAMPTZ,
    deleted_by   VARCHAR(255),
    deleted_at   TIMESTAMPTZ
);

-- Уникальность активного CIDR в рамках компании (защита от гонок дублей)
CREATE UNIQUE INDEX IF NOT EXISTS uq_entries_active_cidr
    ON whitelist_entries(company_id, value_cidr) WHERE deleted_at IS NULL;

-- Составной для списка активных записей компании
CREATE INDEX IF NOT EXISTS idx_entries_active
    ON whitelist_entries(company_id, created_at DESC) WHERE deleted_at IS NULL;

CREATE TABLE IF NOT EXISTS audit_log (
    id           SERIAL PRIMARY KEY,
    user_email   VARCHAR(255) NOT NULL,
    company_id   INTEGER NOT NULL,
    action       VARCHAR(32) NOT NULL CHECK (action IN ('CREATE','UPDATE','DELETE')),
    old_value    TEXT,
    new_value    TEXT,
    entry_id     INTEGER,
    created_at   TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_audit_company_time ON audit_log(company_id, created_at DESC);