-- Tasteby: Oracle ADB (23ai) Schema
-- Run against Oracle ADB before starting the backend.

-- 1. channels
CREATE TABLE channels (
    id            VARCHAR2(36)  DEFAULT SYS_GUID()   NOT NULL,
    channel_id    VARCHAR2(50)                        NOT NULL,
    channel_name  VARCHAR2(200)                       NOT NULL,
    channel_url   VARCHAR2(500),
    is_active     NUMBER(1)     DEFAULT 1             NOT NULL,
    created_at    TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    CONSTRAINT pk_channels PRIMARY KEY (id),
    CONSTRAINT uq_channels_cid UNIQUE (channel_id)
);

-- 2. videos
CREATE TABLE videos (
    id              VARCHAR2(36)  DEFAULT SYS_GUID()   NOT NULL,
    channel_id      VARCHAR2(36)                        NOT NULL,
    video_id        VARCHAR2(20)                        NOT NULL,
    title           VARCHAR2(500)                       NOT NULL,
    url             VARCHAR2(500)                       NOT NULL,
    published_at    TIMESTAMP,
    transcript_text CLOB,
    status          VARCHAR2(20)  DEFAULT 'pending'     NOT NULL,
    processed_at    TIMESTAMP,
    created_at      TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    CONSTRAINT pk_videos PRIMARY KEY (id),
    CONSTRAINT uq_videos_vid UNIQUE (video_id),
    CONSTRAINT fk_videos_channel FOREIGN KEY (channel_id) REFERENCES channels(id),
    CONSTRAINT ck_videos_status CHECK (status IN ('pending','processing','done','error'))
);

-- 3. restaurants
CREATE TABLE restaurants (
    id              VARCHAR2(36)  DEFAULT SYS_GUID()   NOT NULL,
    name            VARCHAR2(200)                       NOT NULL,
    address         VARCHAR2(500),
    region          VARCHAR2(100),
    latitude        NUMBER(10,7),
    longitude       NUMBER(10,7),
    cuisine_type    VARCHAR2(100),
    price_range     VARCHAR2(50),
    phone           VARCHAR2(50),
    website         VARCHAR2(500),
    google_place_id VARCHAR2(200),
    created_at      TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    updated_at      TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    CONSTRAINT pk_restaurants PRIMARY KEY (id)
);

-- 4. video_restaurants (N:M)
CREATE TABLE video_restaurants (
    id              VARCHAR2(36)  DEFAULT SYS_GUID()   NOT NULL,
    video_id        VARCHAR2(36)                        NOT NULL,
    restaurant_id   VARCHAR2(36)                        NOT NULL,
    foods_mentioned CLOB,
    evaluation      CLOB,
    guests          CLOB,
    air_date        DATE,
    citation_text   CLOB,
    created_at      TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    CONSTRAINT pk_video_restaurants PRIMARY KEY (id),
    CONSTRAINT fk_vr_video FOREIGN KEY (video_id) REFERENCES videos(id),
    CONSTRAINT fk_vr_restaurant FOREIGN KEY (restaurant_id) REFERENCES restaurants(id),
    CONSTRAINT uq_vr_video_rest UNIQUE (video_id, restaurant_id)
);

-- JSON check constraints for CLOB JSON columns
-- (Oracle 23ai supports IS JSON on CLOB)
ALTER TABLE video_restaurants ADD CONSTRAINT ck_vr_foods CHECK (foods_mentioned IS JSON);
ALTER TABLE video_restaurants ADD CONSTRAINT ck_vr_eval  CHECK (evaluation IS JSON);
ALTER TABLE video_restaurants ADD CONSTRAINT ck_vr_guests CHECK (guests IS JSON);

-- 5. tasteby_users (NOT "users" — that table belongs to another project)
CREATE TABLE tasteby_users (
    id            VARCHAR2(36)  DEFAULT SYS_GUID()   NOT NULL,
    provider      VARCHAR2(20)                        NOT NULL,
    provider_id   VARCHAR2(200)                       NOT NULL,
    email         VARCHAR2(200),
    nickname      VARCHAR2(100),
    avatar_url    VARCHAR2(500),
    created_at    TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    last_login_at TIMESTAMP,
    CONSTRAINT pk_tasteby_users PRIMARY KEY (id),
    CONSTRAINT uq_tasteby_users_provider UNIQUE (provider, provider_id),
    CONSTRAINT ck_tasteby_users_provider CHECK (provider IN ('google','apple'))
);

-- 6. user_reviews
CREATE TABLE user_reviews (
    id              VARCHAR2(36)  DEFAULT SYS_GUID()   NOT NULL,
    user_id         VARCHAR2(36)                        NOT NULL,
    restaurant_id   VARCHAR2(36)                        NOT NULL,
    rating          NUMBER(2,1)                         NOT NULL,
    review_text     CLOB,
    visited_at      DATE,
    created_at      TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    updated_at      TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    CONSTRAINT pk_user_reviews PRIMARY KEY (id),
    CONSTRAINT fk_ur_user FOREIGN KEY (user_id) REFERENCES tasteby_users(id),
    CONSTRAINT fk_ur_restaurant FOREIGN KEY (restaurant_id) REFERENCES restaurants(id),
    CONSTRAINT ck_ur_rating CHECK (rating BETWEEN 0.5 AND 5.0)
);

-- 7. restaurant_vectors (semantic search)
CREATE TABLE restaurant_vectors (
    id              VARCHAR2(36)  DEFAULT SYS_GUID()   NOT NULL,
    restaurant_id   VARCHAR2(36)                        NOT NULL,
    chunk_text      CLOB                                NOT NULL,
    embedding       VECTOR(1536, FLOAT32),
    created_at      TIMESTAMP     DEFAULT SYSTIMESTAMP  NOT NULL,
    CONSTRAINT pk_restaurant_vectors PRIMARY KEY (id),
    CONSTRAINT fk_rv_restaurant FOREIGN KEY (restaurant_id) REFERENCES restaurants(id)
);

CREATE VECTOR INDEX idx_rv_embedding
    ON restaurant_vectors (embedding)
    ORGANIZATION NEIGHBOR PARTITIONS
    WITH DISTANCE COSINE;

-- Useful indexes
CREATE INDEX idx_videos_status ON videos(status);
CREATE INDEX idx_videos_channel ON videos(channel_id);
CREATE INDEX idx_vr_restaurant ON video_restaurants(restaurant_id);
CREATE INDEX idx_ur_restaurant ON user_reviews(restaurant_id);
CREATE INDEX idx_ur_user ON user_reviews(user_id);