-- =====================================================================
-- vacation_db 초기화 스크립트 (PostgreSQL) — 휴가 관리 모듈
-- =====================================================================
-- 멱등(idempotent): 여러 번 실행해도 안전. 기존 데이터를 삭제하지 않는다.
--
-- ⚠️ 실행 전 사용자 승인 + 백업 확인 필수. DROP/TRUNCATE 없음.
--
-- 실행 방법 (운영 PostgreSQL 컨테이너명: postgres-db):
--
--   1) DB / 역할 / 스키마 생성 (superuser 로 1회)
--      read -s -p "vacation_app password: " APP_PWD; echo
--      docker exec -i postgres-db psql -U postgres \
--          -v app_password="$APP_PWD" \
--          < scripts/sql/vacation_db_init.sql
--
--   2) main-app .env 에 연결 정보 등록
--      VACATION_DB_URL=postgresql://vacation_app:<APP_PWD>@postgres-db:5432/vacation_db
--
--   3) main-app 재기동
--      cd /opt/www/main && docker compose up -d --build
--
-- 주의:
--   - 기존 DB 가 있으면 DROP 하지 않는다(CREATE DATABASE 는 미존재 시에만).
--   - 비밀번호는 절대 Git 에 커밋하지 않는다. psql -v 로만 전달.
-- =====================================================================

\set ON_ERROR_STOP on

-- DB 가 없을 때만 생성
SELECT 'CREATE DATABASE vacation_db ENCODING ''UTF8'' TEMPLATE template0'
WHERE NOT EXISTS (SELECT 1 FROM pg_database WHERE datname = 'vacation_db')
\gexec

-- 앱 전용 로그인 역할 (expense_app / cupang_app 패턴과 동일)
SELECT 'CREATE ROLE vacation_app LOGIN PASSWORD ' || quote_literal(:'app_password')
WHERE NOT EXISTS (SELECT 1 FROM pg_roles WHERE rolname = 'vacation_app')
\gexec

-- 항상 최신 비밀번호로 동기화
SELECT 'ALTER ROLE vacation_app WITH LOGIN PASSWORD ' || quote_literal(:'app_password')
\gexec

GRANT CONNECT ON DATABASE vacation_db TO vacation_app;

-- vacation_db 컨텍스트로 전환
\connect vacation_db

-- ── updated_at 자동 갱신 트리거 함수 (멱등: CREATE OR REPLACE) ──
CREATE OR REPLACE FUNCTION vacation_set_updated_at() RETURNS trigger AS $$
BEGIN
  NEW.updated_at := now();
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

-- ════════════════════════════════════════════════════════════
-- 1) 휴가 신청 (헤더)
-- ════════════════════════════════════════════════════════════
CREATE TABLE IF NOT EXISTS vacation_requests (
    id             TEXT         PRIMARY KEY,
    owner          TEXT         NOT NULL,
    owner_name     TEXT         NOT NULL DEFAULT '',
    vacation_type  TEXT         NOT NULL,
    start_date     DATE         NOT NULL,
    end_date       DATE         NOT NULL,
    start_half     TEXT         NOT NULL DEFAULT 'full',
    end_half       TEXT         NOT NULL DEFAULT 'full',
    days           NUMERIC(5,2) NOT NULL DEFAULT 0,
    reason         TEXT         NOT NULL DEFAULT '',
    status         TEXT         NOT NULL DEFAULT '작성중',
    approver_email TEXT,
    decided_at     TIMESTAMPTZ,
    reject_reason  TEXT         NOT NULL DEFAULT '',
    created_at     TIMESTAMPTZ  NOT NULL DEFAULT now(),
    updated_at     TIMESTAMPTZ  NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS idx_vacation_req_owner_start ON vacation_requests (owner, start_date DESC);
CREATE INDEX IF NOT EXISTS idx_vacation_req_status      ON vacation_requests (status);
CREATE INDEX IF NOT EXISTS idx_vacation_req_range       ON vacation_requests (start_date, end_date);

DROP TRIGGER IF EXISTS trg_vacation_requests_updated ON vacation_requests;
CREATE TRIGGER trg_vacation_requests_updated
  BEFORE UPDATE ON vacation_requests
  FOR EACH ROW EXECUTE FUNCTION vacation_set_updated_at();

-- ════════════════════════════════════════════════════════════
-- 2) 공휴일 (달력 빨강 표시 + 휴가일수 계산 제외 기준)
-- ════════════════════════════════════════════════════════════
CREATE TABLE IF NOT EXISTS vacation_holidays (
    id           BIGSERIAL    PRIMARY KEY,
    holiday_date DATE         NOT NULL UNIQUE,
    name         TEXT         NOT NULL,
    kind         TEXT         NOT NULL DEFAULT 'public',
    is_red       BOOLEAN      NOT NULL DEFAULT TRUE,
    created_at   TIMESTAMPTZ  NOT NULL DEFAULT now(),
    updated_at   TIMESTAMPTZ  NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS idx_vacation_holidays_date ON vacation_holidays (holiday_date);

DROP TRIGGER IF EXISTS trg_vacation_holidays_updated ON vacation_holidays;
CREATE TRIGGER trg_vacation_holidays_updated
  BEFORE UPDATE ON vacation_holidays
  FOR EACH ROW EXECUTE FUNCTION vacation_set_updated_at();

-- ════════════════════════════════════════════════════════════
-- 3) 사용자별 연차 잔여 (연도 단위)
-- ════════════════════════════════════════════════════════════
CREATE TABLE IF NOT EXISTS vacation_balances (
    id          BIGSERIAL    PRIMARY KEY,
    user_email  TEXT         NOT NULL,
    year        INTEGER      NOT NULL,
    total_days  NUMERIC(5,2) NOT NULL DEFAULT 0,
    used_days   NUMERIC(5,2) NOT NULL DEFAULT 0,
    memo        TEXT         NOT NULL DEFAULT '',
    created_at  TIMESTAMPTZ  NOT NULL DEFAULT now(),
    updated_at  TIMESTAMPTZ  NOT NULL DEFAULT now(),
    UNIQUE (user_email, year)
);
CREATE INDEX IF NOT EXISTS idx_vacation_balances_user_year ON vacation_balances (user_email, year);

DROP TRIGGER IF EXISTS trg_vacation_balances_updated ON vacation_balances;
CREATE TRIGGER trg_vacation_balances_updated
  BEFORE UPDATE ON vacation_balances
  FOR EACH ROW EXECUTE FUNCTION vacation_set_updated_at();

-- ════════════════════════════════════════════════════════════
-- 4) 공휴일 seed — 2026년 대한민국 공휴일 (멱등: ON CONFLICT DO NOTHING)
--    연도별로 달라지므로 settings 화면에서 추가/수정/삭제 가능.
--    KASI(한국천문연구원) 발표 기준. 새 연도는 settings 또는 본 seed 추가.
-- ════════════════════════════════════════════════════════════
INSERT INTO vacation_holidays (holiday_date, name, kind) VALUES
  ('2026-01-01', '신정',          'public'),
  ('2026-02-16', '설날 연휴',     'lunar'),
  ('2026-02-17', '설날',          'lunar'),
  ('2026-02-18', '설날 연휴',     'lunar'),
  ('2026-03-01', '삼일절',        'public'),
  ('2026-03-02', '삼일절 대체',   'substitute'),
  ('2026-05-05', '어린이날',      'public'),
  ('2026-05-24', '부처님오신날',  'lunar'),
  ('2026-05-25', '부처님오신날 대체', 'substitute'),
  ('2026-06-06', '현충일',        'public'),
  ('2026-08-15', '광복절',        'public'),
  ('2026-08-17', '광복절 대체',   'substitute'),
  ('2026-09-24', '추석 연휴',     'lunar'),
  ('2026-09-25', '추석',          'lunar'),
  ('2026-09-26', '추석 연휴',     'lunar'),
  ('2026-09-28', '추석 대체',     'substitute'),
  ('2026-10-03', '개천절',        'public'),
  ('2026-10-05', '개천절 대체',   'substitute'),
  ('2026-10-09', '한글날',        'public'),
  ('2026-12-25', '성탄절',        'public')
ON CONFLICT (holiday_date) DO NOTHING;

-- ════════════════════════════════════════════════════════════
-- 5) 권한 (vacation_app: CRUD only)
-- ════════════════════════════════════════════════════════════
GRANT USAGE ON SCHEMA public TO vacation_app;
GRANT SELECT, INSERT, UPDATE, DELETE ON
  vacation_requests, vacation_holidays, vacation_balances
  TO vacation_app;
GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO vacation_app;
ALTER DEFAULT PRIVILEGES IN SCHEMA public
  GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO vacation_app;
ALTER DEFAULT PRIVILEGES IN SCHEMA public
  GRANT USAGE, SELECT ON SEQUENCES TO vacation_app;

SELECT 'vacation_db ready' AS status;