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

-- DROP TABLE users;

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),
    created_at timestamp DEFAULT (current_timestamp),
    CONSTRAINT fk_user FOREIGN KEY(user_id)
        REFERENCES users(id),
    CONSTRAINT fk_resource FOREIGN KEY(resource_id)
        REFERENCES resource(id)
);

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

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,
    staking_source_id int not null,
    resource_id int not null,
    init_supply int not null,
    CONSTRAINT fk_resource FOREIGN KEY(resource_id)
        REFERENCES resource(id),
    CONSTRAINT fk_ssource FOREIGN KEY(staking_source_id)
        REFERENCES staking_source(id)
);

CREATE TABLE staking_event(
    id integer primary key autoincrement,
    well_id int not null,
    source_id 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)
);

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

CREATE TABLE claim_event(
    id integer primary key autoincrement,
    staking_source_id int not null,
    claim_type text CHECK ( claim_type IN ('BASE','BONUS') ),
    created_at timestamp DEFAULT (current_timestamp),
    CONSTRAINT fk_ures FOREIGN KEY(staking_source_id)
        REFERENCES staking_source(id)
);