CREATE TABLE ai_point_usage_logs (
    id                       BIGSERIAL PRIMARY KEY,
    tenant_id                BIGINT NOT NULL REFERENCES tenants(id),
    operator_id              BIGINT REFERENCES users(id),
    quota_reservation_id     BIGINT REFERENCES quota_reservations(id),
    usage_type               VARCHAR(64) NOT NULL,
    resource_type            VARCHAR(64),
    resource_id              BIGINT,
    resource_uid             VARCHAR(128),
    request_chars            INT NOT NULL DEFAULT 0,
    base_chars               INT NOT NULL DEFAULT 1000,
    points                   INT NOT NULL,
    status                   VARCHAR(20) NOT NULL DEFAULT 'pending',
    model                    VARCHAR(128),
    metadata_json            JSONB NOT NULL DEFAULT '{}'::jsonb,
    error_message            TEXT,
    completed_at             TIMESTAMPTZ,
    created_at               TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at               TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT chk_ai_point_usage_status
        CHECK (status IN ('pending', 'completed', 'refunded', 'failed'))
);

CREATE INDEX idx_ai_point_usage_tenant_created
    ON ai_point_usage_logs(tenant_id, created_at DESC);

CREATE INDEX idx_ai_point_usage_tenant_operator_created
    ON ai_point_usage_logs(tenant_id, operator_id, created_at DESC);

CREATE INDEX idx_ai_point_usage_reservation
    ON ai_point_usage_logs(quota_reservation_id);

CREATE INDEX idx_ai_point_usage_resource
    ON ai_point_usage_logs(tenant_id, resource_type, resource_id, resource_uid);

CREATE INDEX idx_quota_reservations_tenant_type_created_status
    ON quota_reservations(tenant_id, quota_type, created_at, status);