PRAGMA foreign_keys = ON;

CREATE TABLE users (
    id integer primary key autoincrement,
    name varchar(32) not null
);

CREATE TABLE resource(
    id integer primary key autoincrement,
    name varchar(32) not null unique
);

CREATE TABLE staking_source(
    id integer primary key autoincrement,
    user_id int not null,
    address varchar(128) not null,
    created_at timestamp DEFAULT (current_timestamp),
    CONSTRAINT fk_user FOREIGN KEY(user_id)
        REFERENCES users(id)
);

CREATE TABLE resource_well(
    id integer primary key autoincrement,
    source_id int not null,
    resource_id int not null,
    supply int not null,
    CONSTRAINT fk_rid FOREIGN KEY(resource_id)
        REFERENCES resource(id),
    CONSTRAINT fk_sid FOREIGN KEY(source_id)
        REFERENCES staking_source(id)
        ON DELETE CASCADE
);

CREATE TABLE staking_event(
    id integer primary key autoincrement,
    well_id int not null,
    source_id int not null,
    inventory_item_id int not null,
    duration_in_mins int not null,
    created_at timestamp DEFAULT (current_timestamp),
    CONSTRAINT fk_sid FOREIGN KEY(source_id)
        REFERENCES staking_source(id)
    CONSTRAINT fk_wid FOREIGN KEY(well_id)
        REFERENCES resource_well(id)
    CONSTRAINT fk_iiid FOREIGN KEY(inventory_item_id)
        REFERENCES inventory_item(id)
);

CREATE TABLE claim_event(
    id integer primary key autoincrement,
    claim_amount int not null,
    staking_event_id int not null,
    created_at timestamp DEFAULT (current_timestamp),
    CONSTRAINT fk_se_id FOREIGN KEY(staking_event_id)
        REFERENCES staking_event(id)
);

CREATE TABLE upgrade_event(
    id integer primary key autoincrement,
    inventory_item_id int not null,
    created_at timestamp DEFAULT (current_timestamp),
    CONSTRAINT fk_iid FOREIGN KEY(inventory_item_id)
        REFERENCES inventory_item(id)
);

CREATE TABLE store_item(
    id integer primary key autoincrement,
    name varchar(128) not null,
    currency int not null,
    price int not null,
    target_resource int not null,
    claim_amount int not null,
    CONSTRAINT fk_rid FOREIGN KEY(currency)
        REFERENCES resource(id)
    CONSTRAINT fk_targetid FOREIGN KEY(target_resource)
        REFERENCES resource(id)
);

CREATE TABLE inventory_item(
    id integer primary key autoincrement,
    user_id int not null,
    store_item_id int not null,
    created_at timestamp DEFAULT (current_timestamp),
    CONSTRAINT fk_user FOREIGN KEY(user_id)
        REFERENCES users(id)
    CONSTRAINT fk_sitemid FOREIGN KEY(store_item_id)
        REFERENCES store_item(id)
);

CREATE TABLE bank_account(
    id integer primary key autoincrement,
    user_id int not null,
    resource_id int not null,
    balance int not null default 0 CHECK (balance >= 0),
    CONSTRAINT fk_user FOREIGN KEY(user_id)
        REFERENCES users(id),
    CONSTRAINT fk_resource FOREIGN KEY(resource_id)
        REFERENCES resource(id)
);