-- TODO:
-- title table triggers
-- maybe jsonb constraints
-- actions (delete)
BEGIN;

CREATE TYPE usertitle_status_t AS ENUM ('finished', 'planned', 'dropped', 'in-progress');
CREATE TYPE storage_type_t AS ENUM ('local', 's3');
CREATE TYPE title_status_t AS ENUM ('finished', 'ongoing', 'planned');
CREATE TYPE release_season_t AS ENUM ('winter', 'spring', 'summer', 'fall');

CREATE TABLE usertitles (
    usertitle_id    serial              PRIMARY KEY,
    user_id         int                 NOT NULL REFERENCES users,
    title_id        int                 NOT NULL REFERENCES titles,
    status          usertitle_status_t  NOT NULL,
    rate            int                 CHECK (rate > 0 AND rate <= 10),
    review_id       int                 REFERENCES reviews
);

CREATE TABLE users (
    user_id         serial              PRIMARY KEY,
    avatar_id       int                 REFERENCES images (image_id),
    nickname        varchar(16)         NOT NULL CHECK (nickname ~ '^[a-zA-Z0-9_-]+$'),
    disp_name       varchar(32),
    user_desc       varchar(512),
    creation_date   timestamp           NOT NULL
);

CREATE TABLE images (
    image_id        serial              PRIMARY KEY,
    storage_type    storage_type_t      NOT NULL,
    image_path      varchar(256)        UNIQUE NOT NULL
);

CREATE TABLE reviews (
    review_id       serial              PRIMARY KEY,
    user_id         int                 NOT NULL REFERENCES users,
    title_id        int                 NOT NULL REFERENCES titles,
    image_ids       int[],
    review_text     text                NOT NULL,
    creation_date   timestamp           NOT NULL
);

CREATE TABLE tags (
    tag_id          serial              PRIMARY KEY,
    tag_names       jsonb               NOT NULL            --mb constraints
);

CREATE TABLE titles (
    title_id        serial              PRIMARY KEY,
    title_names     jsonb               NOT NULL,
    studio_id       int                 NOT NULL REFERENCES studios,
    poster_id       int                 REFERENCES images (image_id),
    signal_ids      int[]               NOT NULL,
    title_status    title_status_t      NOT NULL,                          
    rating          float               CHECK (rating > 0 AND rating <= 10),    --by trigger
    rating_count    int                 CHECK (rating_count >= 0),              --by trigger
    release_year    int                 CHECK (release_year >= 1900),
    release_season  release_season_t,
    season          int                 CHECK (season >= 0),
    episodes_aired  int                 CHECK (episodes_aired >= 0),
    episodes_all    int                 CHECK (episodes_all >= 0),
    episodes_len    jsonb,
    CHECK ((episodes_aired IS NULL AND episodes_all IS NULL)
        OR (episodes_aired IS NOT NULL AND episodes_all IS NOT NULL 
        AND episodes_aired <= episodes_all))
);

CREATE TABLE title_tags (
                                        PRIMARY KEY (title_id, tag_id),
    title_id        int                 NOT NULL REFERENCES titles,
    tag_id          int                 NOT NULL REFERENCES tags
);

CREATE TABLE studios (
    studio_id       serial              PRIMARY KEY,
    studio_name     varchar(64)         UNIQUE,
    illust_id       int                 REFERENCES images (image_id),
    studio_desc     text
);

CREATE TABLE signals (
    signal_id       serial              PRIMARY KEY,
    raw_data        jsonb               NOT NULL,
    provider_id     int                 NOT NULL REFERENCES providers,
    dirty           bool                NOT NULL
);

CREATE TABLE providers (
    provider_id     serial              PRIMARY KEY,
    provider_name   varchar(64)           NOT NULL
);

COMMIT;