-- W3-3 포스팅 보드. 멱등. db/apply-local-ddl.sh 로 실행 DB 비파괴 적용.
-- posts / post_categories / unity_feed_sources / unity_feed_items. 추가만, 파괴 없음.

-- 1) post_categories (운영자 CRUD 카테고리 — D1/G2)
CREATE SEQUENCE IF NOT EXISTS "post_categories_id_seq";
CREATE TABLE IF NOT EXISTS "post_categories" (
    "id"          bigint DEFAULT nextval('post_categories_id_seq'::regclass) NOT NULL,
    "name"        character varying(80) NOT NULL,
    "slug"        character varying(80) NOT NULL,
    "sort_order"  integer DEFAULT 0 NOT NULL,
    "is_active"   boolean DEFAULT true NOT NULL,
    "created_at"  timestamp with time zone DEFAULT now() NOT NULL,
    "updated_at"  timestamp with time zone DEFAULT now() NOT NULL,
    PRIMARY KEY ("id")
);
ALTER SEQUENCE "post_categories_id_seq" OWNED BY "post_categories"."id";
CREATE UNIQUE INDEX IF NOT EXISTS "ux_post_categories_slug"
    ON "post_categories" ("slug");

-- 2) posts (D1) — body_markdown 원본 + body_sanitized_html 캐시(D4), og_* 캐시(D5)
CREATE SEQUENCE IF NOT EXISTS "posts_id_seq";
CREATE TABLE IF NOT EXISTS "posts" (
    "id"                  bigint DEFAULT nextval('posts_id_seq'::regclass) NOT NULL,
    "category_id"         bigint NOT NULL,
    "author_user_id"      bigint NOT NULL,
    "title"               character varying(200) NOT NULL,
    "body_markdown"       text NOT NULL,
    "body_sanitized_html" text NOT NULL,
    "link_url"            character varying(2048),
    "og_title"            character varying(300),
    "og_description"      character varying(600),
    "og_image_url"        character varying(2048),
    "og_site_name"        character varying(200),
    "og_fetched_at"       timestamp with time zone,
    "status"              character varying(20) DEFAULT 'PUBLISHED' NOT NULL,
    "created_at"          timestamp with time zone DEFAULT now() NOT NULL,
    "updated_at"          timestamp with time zone DEFAULT now() NOT NULL,
    "deleted_at"          timestamp with time zone,
    "is_delete"           boolean DEFAULT false NOT NULL,
    PRIMARY KEY ("id")
);
ALTER SEQUENCE "posts_id_seq" OWNED BY "posts"."id";
DO $$
BEGIN
    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'posts_category_id_fkey') THEN
        ALTER TABLE "posts"
            ADD CONSTRAINT "posts_category_id_fkey"
            FOREIGN KEY ("category_id") REFERENCES "post_categories" ("id");
    END IF;
    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'posts_author_user_id_fkey') THEN
        ALTER TABLE "posts"
            ADD CONSTRAINT "posts_author_user_id_fkey"
            FOREIGN KEY ("author_user_id") REFERENCES "users" ("id");
    END IF;
    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'posts_status_check') THEN
        ALTER TABLE "posts"
            ADD CONSTRAINT "posts_status_check"
            CHECK ("status" IN ('DRAFT', 'PUBLISHED'));
    END IF;
END
$$;
CREATE INDEX IF NOT EXISTS "idx_posts_published_keyset"
    ON "posts" ("status", "is_delete", "created_at" DESC, "id" DESC);
CREATE INDEX IF NOT EXISTS "idx_posts_category_keyset"
    ON "posts" ("category_id", "created_at" DESC, "id" DESC)
    WHERE "is_delete" = false AND "status" = 'PUBLISHED';

-- 3) unity_feed_sources (외부 피드 감시 소스 — D6/G5)
CREATE SEQUENCE IF NOT EXISTS "unity_feed_sources_id_seq";
CREATE TABLE IF NOT EXISTS "unity_feed_sources" (
    "id"             bigint DEFAULT nextval('unity_feed_sources_id_seq'::regclass) NOT NULL,
    "name"           character varying(120) NOT NULL,
    "feed_url"       character varying(2048) NOT NULL,
    "is_active"      boolean DEFAULT true NOT NULL,
    "last_polled_at" timestamp with time zone,
    "last_seen_guid" character varying(512),
    "last_error"     character varying(500),
    "created_at"     timestamp with time zone DEFAULT now() NOT NULL,
    PRIMARY KEY ("id")
);
ALTER SEQUENCE "unity_feed_sources_id_seq" OWNED BY "unity_feed_sources"."id";
CREATE UNIQUE INDEX IF NOT EXISTS "ux_unity_feed_sources_url"
    ON "unity_feed_sources" ("feed_url");

-- 4) unity_feed_items (감지된 새 글 — 운영자 알림 표면 + dedupe 영속화)
CREATE SEQUENCE IF NOT EXISTS "unity_feed_items_id_seq";
CREATE TABLE IF NOT EXISTS "unity_feed_items" (
    "id"             bigint DEFAULT nextval('unity_feed_items_id_seq'::regclass) NOT NULL,
    "source_id"      bigint NOT NULL,
    "guid"           character varying(512) NOT NULL,
    "title"          character varying(500) NOT NULL,
    "link_url"       character varying(2048) NOT NULL,
    "published_at"   timestamp with time zone,
    "is_acknowledged" boolean DEFAULT false NOT NULL,
    "detected_at"    timestamp with time zone DEFAULT now() NOT NULL,
    PRIMARY KEY ("id")
);
ALTER SEQUENCE "unity_feed_items_id_seq" OWNED BY "unity_feed_items"."id";
DO $$
BEGIN
    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'unity_feed_items_source_id_fkey') THEN
        ALTER TABLE "unity_feed_items"
            ADD CONSTRAINT "unity_feed_items_source_id_fkey"
            FOREIGN KEY ("source_id") REFERENCES "unity_feed_sources" ("id");
    END IF;
END
$$;
CREATE UNIQUE INDEX IF NOT EXISTS "ux_unity_feed_items_source_guid"
    ON "unity_feed_items" ("source_id", "guid");
CREATE INDEX IF NOT EXISTS "idx_unity_feed_items_unack"
    ON "unity_feed_items" ("is_acknowledged", "detected_at" DESC)
    WHERE "is_acknowledged" = false;