-- V88: 수입수수료 + 수지차 (income_commission_ledger + margin_summary)
--      보험사가 GA에 지급한 수입 측 원장. 수지차 = 수입 합계 - 지급 합계(settle_master 기준).
--
-- settle_master 지급 합계 집계 컬럼 (확인 완료):
--   settle_master.agent_id  : 설계사 FK (BIGINT)
--   settle_master.settle_month : 정산월 CHAR(6)
--   settle_master.net_amount   : 설계사 실지급액 (세후) NUMERIC
--   settle_master.gross_amount : 설계사 총지급액 (세전) NUMERIC
--   payout_total 산출 시 net_amount 합산 권장 (tax_amount 차감 후 기준)

-- ============================================================
-- 1. income_commission_ledger — 수입수수료 원장
--    보험사 → GA 수입 수수료. 계약 단위로 발생.
-- ============================================================

CREATE TABLE income_commission_ledger (
    income_id        BIGSERIAL      PRIMARY KEY,
    contract_id      BIGINT         NOT NULL REFERENCES contract(contract_id),
    carrier_id       BIGINT         NOT NULL REFERENCES insurance_company(company_id),
    settle_month     CHAR(6)        NOT NULL,
    premium_amount   NUMERIC(15,2)  NOT NULL,
    company_rate     NUMERIC(7,4)   NOT NULL,
    income_amount    NUMERIC(15,2)  NOT NULL,
    commission_type  VARCHAR(20)    NOT NULL,
    status           VARCHAR(20)    NOT NULL DEFAULT 'CALCULATED',
    created_at       TIMESTAMP      NOT NULL DEFAULT NOW(),
    updated_at       TIMESTAMP,
    CHECK (commission_type IN ('RECRUIT','MAINTAIN','RENEWAL','REINSTATE','COLLECTION')),
    CHECK (status IN ('CALCULATED','CONFIRMED','CANCELLED')),
    CHECK (company_rate >= 0 AND company_rate <= 1),
    CHECK (premium_amount >= 0),
    CHECK (income_amount >= 0)
);

COMMENT ON TABLE  income_commission_ledger                  IS '수입수수료 원장 — 보험사가 GA에 지급한 수입 수수료 (계약 단위)';
COMMENT ON COLUMN income_commission_ledger.income_id        IS '수입수수료 원장 PK';
COMMENT ON COLUMN income_commission_ledger.contract_id      IS '대상 계약 FK';
COMMENT ON COLUMN income_commission_ledger.carrier_id       IS '보험사 FK (insurance_company.company_id)';
COMMENT ON COLUMN income_commission_ledger.settle_month     IS '정산 귀속월 (YYYYMM)';
COMMENT ON COLUMN income_commission_ledger.premium_amount   IS '보험료';
COMMENT ON COLUMN income_commission_ledger.company_rate     IS '보험사 수수료율 (소수, 예: 0.12 = 12%)';
COMMENT ON COLUMN income_commission_ledger.income_amount    IS '수입수수료 = premium_amount × company_rate';
COMMENT ON COLUMN income_commission_ledger.commission_type  IS '수수료 유형 (RECRUIT/MAINTAIN/RENEWAL/REINSTATE/COLLECTION)';
COMMENT ON COLUMN income_commission_ledger.status           IS '상태 (CALCULATED/CONFIRMED/CANCELLED)';

CREATE INDEX idx_icl_carrier_month ON income_commission_ledger(carrier_id, settle_month);
CREATE INDEX idx_icl_contract      ON income_commission_ledger(contract_id);
CREATE INDEX idx_icl_status_month  ON income_commission_ledger(status, settle_month);

-- ============================================================
-- 2. margin_summary — 수지차 집계
--    수지차 recalc 배치 액션으로 채움.
--    agent_id NULL = 전체(GA 총 수지차).
--    payout_total: settle_master.net_amount SUM (설계사별 세후 실지급액 기준)
-- ============================================================

CREATE TABLE margin_summary (
    margin_id      BIGSERIAL      PRIMARY KEY,
    settle_month   CHAR(6)        NOT NULL,
    agent_id       BIGINT         REFERENCES agent(agent_id),
    income_total   NUMERIC(15,2)  NOT NULL DEFAULT 0,
    payout_total   NUMERIC(15,2)  NOT NULL DEFAULT 0,
    margin_amount  NUMERIC(15,2)  NOT NULL DEFAULT 0,
    margin_rate    NUMERIC(7,4),
    created_at     TIMESTAMP      NOT NULL DEFAULT NOW(),
    UNIQUE (settle_month, agent_id),
    CHECK (income_total >= 0),
    CHECK (payout_total >= 0)
);

COMMENT ON TABLE  margin_summary               IS '수지차 집계 — settle_month + agent_id 단위 수입/지급 대비 수지차';
COMMENT ON COLUMN margin_summary.margin_id     IS '수지차 집계 PK';
COMMENT ON COLUMN margin_summary.settle_month  IS '정산월 (YYYYMM)';
COMMENT ON COLUMN margin_summary.agent_id      IS '설계사 FK (NULL = GA 전체 합산)';
COMMENT ON COLUMN margin_summary.income_total  IS '수입 합계 (income_commission_ledger SUM)';
COMMENT ON COLUMN margin_summary.payout_total  IS '지급 합계 (settle_master.net_amount SUM — 설계사 세후 실지급액)';
COMMENT ON COLUMN margin_summary.margin_amount IS '수지차 = income_total - payout_total';
COMMENT ON COLUMN margin_summary.margin_rate   IS '수지차율 = margin_amount / income_total (income_total > 0 일 때)';

CREATE INDEX idx_ms_month       ON margin_summary(settle_month);
CREATE INDEX idx_ms_agent_month ON margin_summary(agent_id, settle_month);