CREATE SCHEMA IF NOT EXISTS ops;

CREATE TABLE ops.operator_accounts (
    id              BIGSERIAL PRIMARY KEY,
    username        VARCHAR(64)  NOT NULL,
    email           VARCHAR(255),
    password_hash   VARCHAR(255) NOT NULL,
    display_name    VARCHAR(100) NOT NULL,
    role            VARCHAR(32)  NOT NULL DEFAULT 'admin',
    status          VARCHAR(20)  NOT NULL DEFAULT 'active',
    last_login_at   TIMESTAMPTZ,
    created_by      BIGINT,
    created_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
    updated_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
    deleted_at      TIMESTAMPTZ
);

CREATE UNIQUE INDEX uk_ops_operator_username
    ON ops.operator_accounts(username)
    WHERE deleted_at IS NULL;

CREATE UNIQUE INDEX uk_ops_operator_email
    ON ops.operator_accounts(email)
    WHERE email IS NOT NULL AND deleted_at IS NULL;

CREATE TABLE ops.audit_logs (
    id              BIGSERIAL PRIMARY KEY,
    operator_id     BIGINT,
    operator_name   VARCHAR(100),
    action          VARCHAR(64)  NOT NULL,
    target_type     VARCHAR(64),
    target_id       VARCHAR(128),
    metadata        JSONB,
    ip              VARCHAR(64),
    user_agent      TEXT,
    request_id      VARCHAR(64),
    created_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_ops_audit_created_at
    ON ops.audit_logs(created_at DESC);

CREATE INDEX idx_ops_audit_operator
    ON ops.audit_logs(operator_id, created_at DESC)
    WHERE operator_id IS NOT NULL;

CREATE INDEX idx_ops_audit_action
    ON ops.audit_logs(action, created_at DESC);