-- =====================================================================
-- project_db 마이그레이션 002 — 첨부파일 + 알림센터
-- =====================================================================
-- 멱등(idempotent). DROP/TRUNCATE 없음.
--
-- 실행:
--   docker exec -i postgres-db psql -U postgres -d project_db \
--       < scripts/sql/project_db_002_attachments_notifications.sql
--
-- (task_comments 는 init 스크립트에 이미 있음 — 여기서 다루지 않음)
-- =====================================================================

\set ON_ERROR_STOP on
\connect project_db

-- ════════════════════════════════════════════════════════════
-- 업무 첨부파일 — 실제 파일은 DATA_DIR/project/<task_id>/ 에 저장.
-- 여기엔 메타데이터만(원본명/저장명/크기/타입/업로더).
-- ════════════════════════════════════════════════════════════
CREATE TABLE IF NOT EXISTS task_attachments (
    id            BIGSERIAL    PRIMARY KEY,
    task_id       BIGINT       NOT NULL REFERENCES tasks(id) ON DELETE CASCADE,
    filename      TEXT         NOT NULL,              -- 사용자에게 보일 원본 파일명
    stored_name   TEXT         NOT NULL,              -- 디스크 저장명(UUID.ext)
    content_type  TEXT         NOT NULL DEFAULT '',
    size_bytes    BIGINT       NOT NULL DEFAULT 0,
    uploaded_by   TEXT         NOT NULL DEFAULT '',
    created_at    TIMESTAMPTZ  NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS idx_task_attachments_task ON task_attachments (task_id, created_at);

-- ════════════════════════════════════════════════════════════
-- 알림센터 — 사용자별 인앱 알림(아사나 Inbox).
-- 업무 배정/완료/댓글/단계변경 시 관련자에게 1행씩 생성.
-- ════════════════════════════════════════════════════════════
CREATE TABLE IF NOT EXISTS project_notifications (
    id              BIGSERIAL    PRIMARY KEY,
    recipient_email TEXT         NOT NULL,
    actor_email     TEXT         NOT NULL DEFAULT '',
    project_id      BIGINT       REFERENCES projects(id) ON DELETE CASCADE,
    task_id         BIGINT       REFERENCES tasks(id) ON DELETE CASCADE,
    type            TEXT         NOT NULL,            -- assigned | completed | comment | stage_changed
    title           TEXT         NOT NULL DEFAULT '',
    body            TEXT         NOT NULL DEFAULT '',
    is_read         BOOLEAN      NOT NULL DEFAULT FALSE,
    created_at      TIMESTAMPTZ  NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS idx_project_notif_recipient
  ON project_notifications (recipient_email, is_read, created_at DESC);

-- ════════════════════════════════════════════════════════════
-- 권한 (project_app: CRUD only)
-- ════════════════════════════════════════════════════════════
GRANT SELECT, INSERT, UPDATE, DELETE ON task_attachments, project_notifications TO project_app;
GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO project_app;

SELECT 'project_db 002 ready' AS status;