CREATE TABLE delivery_part_bucket (
    year     INTEGER NOT NULL,
    did      INTEGER NOT NULL,
    dpnr     INTEGER NOT NULL,
    bktnr    INTEGER NOT NULL,

    discr    TEXT    NOT NULL,
    value    INTEGER NOT NULL,

    CONSTRAINT pk_delivery_part_bucket PRIMARY KEY (year, did, dpnr, bktnr),
    CONSTRAINT fk_delivery_part_bucket_delivery_part FOREIGN KEY (year, did, dpnr) REFERENCES delivery_part (year, did, dpnr)
        ON UPDATE CASCADE
        ON DELETE CASCADE
) STRICT;

CREATE TABLE payment_variant (
    year          INTEGER NOT NULL,
    avnr          INTEGER NOT NULL,

    name          TEXT    NOT NULL,
    date          TEXT    NOT NULL CHECK (date          REGEXP '^[1-9][0-9]{3}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])$') DEFAULT CURRENT_DATE,
    transfer_date TEXT             CHECK (transfer_date REGEXP '^[1-9][0-9]{3}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])$'),
    test_variant  INTEGER NOT NULL CHECK (test_variant IN (TRUE, FALSE)),
    calc_time     INTEGER,

    comment       TEXT DEFAULT NULL,
    data          TEXT    NOT NULL,
    ctime         INTEGER NOT NULL DEFAULT (UNIXEPOCH()),
    mtime         INTEGER NOT NULL DEFAULT (UNIXEPOCH()),

    CONSTRAINT pk_payment PRIMARY KEY (year, avnr)
) STRICT;

-- all values in the table are stored with season-precision!
CREATE TABLE payment_delivery_part (
    year       INTEGER NOT NULL,
    did        INTEGER NOT NULL,
    dpnr       INTEGER NOT NULL,
    avnr       INTEGER NOT NULL,

    net_amount INTEGER NOT NULL,
    mod_abs    INTEGER NOT NULL DEFAULT 0,
    mod_rel    REAL    NOT NULL DEFAULT 0,
    amount     INTEGER NOT NULL GENERATED ALWAYS AS (ROUND(net_amount * (1 + mod_rel) + mod_abs)) STORED,

    CONSTRAINT pk_payment_delivery_part PRIMARY KEY (year, did, dpnr, avnr),
    CONSTRAINT fk_payment_delivery_part_delivery_part FOREIGN KEY (year, did, dpnr) REFERENCES delivery_part (year, did, dpnr)
        ON UPDATE CASCADE
        ON DELETE CASCADE,
    CONSTRAINT fk_payment_delivery_part_payment_variant FOREIGN KEY (year, avnr) REFERENCES payment_variant (year, avnr)
        ON UPDATE CASCADE
        ON DELETE CASCADE
) STRICT;

CREATE TRIGGER t_payment_delivery_part_i
    AFTER INSERT ON payment_delivery_part FOR EACH ROW
BEGIN
    INSERT INTO payment_member (year, avnr, mgnr, net_amount)
    SELECT year, NEW.avnr, mgnr, NEW.amount FROM delivery WHERE (year, did) = (NEW.year, NEW.did)
    ON CONFLICT DO UPDATE SET net_amount = net_amount + excluded.net_amount;
END;

CREATE TRIGGER t_payment_delivery_part_u
    AFTER UPDATE ON payment_delivery_part FOR EACH ROW
BEGIN
    UPDATE payment_member
    SET net_amount = net_amount - OLD.amount
    WHERE (year, avnr, mgnr) IN (SELECT year, OLD.avnr, mgnr FROM delivery WHERE (year, did) = (OLD.year, OLD.did));
    INSERT INTO payment_member (year, avnr, mgnr, net_amount)
    SELECT year, NEW.avnr, mgnr, NEW.amount FROM delivery WHERE (year, did) = (NEW.year, NEW.did)
    ON CONFLICT DO UPDATE SET net_amount = net_amount + excluded.net_amount;
END;

CREATE TRIGGER t_payment_delivery_part_d
    AFTER DELETE ON payment_delivery_part FOR EACH ROW
BEGIN
    UPDATE payment_member
    SET net_amount = net_amount - OLD.amount
    WHERE (year, avnr, mgnr) IN (SELECT year, OLD.avnr, mgnr FROM delivery WHERE (year, did) = (OLD.year, OLD.did));
END;

-- all values in the table are stored with season-precision!
CREATE TABLE payment_delivery_part_bucket (
    year   INTEGER NOT NULL,
    did    INTEGER NOT NULL,
    dpnr   INTEGER NOT NULL,
    bktnr  INTEGER NOT NULL,
    avnr   INTEGER NOT NULL,

    price  INTEGER NOT NULL,
    amount INTEGER NOT NULL,

    CONSTRAINT pk_payment_delivery_part_bucket PRIMARY KEY (year, did, dpnr, bktnr, avnr),
    CONSTRAINT fk_payment_delivery_part_bucket_delivery_part_bucket FOREIGN KEY (year, did, dpnr, bktnr) REFERENCES delivery_part_bucket (year, did, dpnr, bktnr)
        ON UPDATE CASCADE
        ON DELETE CASCADE,
    CONSTRAINT fk_payment_delivery_part_bucket_payment_variant FOREIGN KEY (year, avnr) REFERENCES payment_variant (year, avnr)
        ON UPDATE CASCADE
        ON DELETE CASCADE
) STRICT;

CREATE TRIGGER t_payment_delivery_part_bucket_i
    AFTER INSERT ON payment_delivery_part_bucket FOR EACH ROW
BEGIN
    INSERT INTO payment_delivery_part (year, did, dpnr, avnr, net_amount)
    VALUES (NEW.year, NEW.did, NEW.dpnr, NEW.avnr, NEW.amount)
    ON CONFLICT DO UPDATE SET net_amount = net_amount + NEW.amount;
END;

CREATE TRIGGER t_payment_delivery_part_bucket_u
    AFTER UPDATE ON payment_delivery_part_bucket FOR EACH ROW
BEGIN
    UPDATE payment_delivery_part
    SET net_amount = net_amount - OLD.amount
    WHERE (year, did, dpnr, avnr) = (OLD.year, OLD.did, OLD.dpnr, OLD.avnr);
    UPDATE payment_delivery_part
    SET net_amount = net_amount + NEW.amount
    WHERE (year, did, dpnr, avnr) = (NEW.year, NEW.did, NEW.dpnr, NEW.avnr);
END;

CREATE TRIGGER t_payment_delivery_part_bucket_d
    AFTER DELETE ON payment_delivery_part_bucket FOR EACH ROW
BEGIN
    UPDATE payment_delivery_part
    SET net_amount = net_amount - OLD.amount
    WHERE (year, did, dpnr, avnr) = (OLD.year, OLD.did, OLD.dpnr, OLD.avnr);
END;

-- all values in the table are stored with season-precision!
CREATE TABLE payment_member (
    year       INTEGER NOT NULL,
    avnr       INTEGER NOT NULL,
    mgnr       INTEGER NOT NULL,

    net_amount INTEGER NOT NULL,
    mod_abs    INTEGER NOT NULL DEFAULT 0,
    mod_rel    REAL    NOT NULL DEFAULT 0,
    amount     INTEGER NOT NULL GENERATED ALWAYS AS (ROUND(net_amount * (1 + mod_rel) + mod_abs)) STORED,

    CONSTRAINT pk_payment_member PRIMARY KEY (year, avnr, mgnr),
    CONSTRAINT fk_payment_member_payment_variant FOREIGN KEY (year, avnr) REFERENCES payment_variant (year, avnr)
        ON UPDATE CASCADE
        ON DELETE CASCADE,
    CONSTRAINT fk_payment_member_member FOREIGN KEY (mgnr) REFERENCES member (mgnr)
        ON UPDATE CASCADE
        ON DELETE CASCADE
) STRICT;

-- all values in the table are stored with precision 2!
CREATE TABLE credit (
    year            INTEGER NOT NULL,
    tgnr            INTEGER NOT NULL,

    mgnr            INTEGER NOT NULL,
    avnr            INTEGER NOT NULL,

    net_amount      INTEGER NOT NULL,
    prev_net_amount INTEGER,
    vat             REAL    NOT NULL,
    vat_amount      INTEGER NOT NULL GENERATED ALWAYS AS (ROUND((net_amount - COALESCE(prev_net_amount, 0)) * vat)) STORED,
    gross_amount    INTEGER NOT NULL GENERATED ALWAYS AS (net_amount - COALESCE(prev_net_amount, 0) + vat_amount) STORED,
    modifiers       INTEGER,
    prev_modifiers  INTEGER,
    amount          INTEGER NOT NULL GENERATED ALWAYS AS (gross_amount + COALESCE(modifiers, 0) - COALESCE(prev_modifiers, 0)) STORED,

    ctime           INTEGER NOT NULL DEFAULT (UNIXEPOCH()),
    mtime           INTEGER NOT NULL DEFAULT (UNIXEPOCH()),

    CONSTRAINT pk_credit PRIMARY KEY (year, tgnr),
    CONSTRAINT sk_credit_payment_member UNIQUE (year, avnr, mgnr),
    CONSTRAINT fk_credit_member FOREIGN KEY (mgnr) REFERENCES member (mgnr)
        ON UPDATE CASCADE
        ON DELETE RESTRICT,
    CONSTRAINT fk_credit_payment_member FOREIGN KEY (year, avnr, mgnr) REFERENCES payment_member (year, avnr, mgnr)
        ON UPDATE CASCADE
        ON DELETE RESTRICT
) STRICT;