PRAGMA foreign_keys = ON;

---------------- Tables ---------------------
CREATE TABLE household(
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	name TEXT UNIQUE NOT NULL,
	currency TEXT NOT NULL,
	password_hash TEXT NOT NULL,
	password_salt TEXT NOT NULL
);

CREATE TABLE account(
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	name TEXT NOT NULL,
	household_id INTEGER NOT NULL,

	FOREIGN KEY(household_id) REFERENCES household(id),
	CONSTRAINT account_uk1 UNIQUE (household_id, name)
);

CREATE TABLE category_group(
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	name TEXT NOT NULL,
	expense INTEGER NOT NULL,
	exclude INTEGER NOT NULL,
	household_id INTEGER NOT NULL,
	system INTEGER NOT NULL DEFAULT 0,

	FOREIGN KEY(household_id) REFERENCES household(id),
	CONSTRAINT category_group_uk1 UNIQUE (household_id, name)
);

CREATE TABLE category(
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	category_group_id INTEGER NOT NULL,
	name TEXT NOT NULL,

	FOREIGN KEY(category_group_id) REFERENCES category_group(id),
	CONSTRAINT category_uk1 UNIQUE (category_group_id, name)
);

CREATE TABLE rule(
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	category_id INTEGER NOT NULL,
	account_id INTEGER,
	regex TEXT NOT NULL,
	sort_order INTEGER,
	household_id INTEGER NOT NULL,

	FOREIGN KEY(category_id) REFERENCES category(id),
	FOREIGN KEY(account_id) REFERENCES account(id),
	FOREIGN KEY(household_id) REFERENCES household(id)
);

CREATE TABLE record(
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	category_id INTEGER NOT NULL,
	account_id INTEGER NOT NULL,
	year INTEGER NOT NULL,
	month INTEGER NOT NULL,
	day INTEGER NOT NULL,
	transaction_id TEXT,
	label TEXT,
	comment TEXT,
	amount INTEGER NOT NULL,
	expense INTEGER NOT NULL,

	FOREIGN KEY(category_id) REFERENCES category(id),
	FOREIGN KEY(account_id) REFERENCES account(id)
);

---------------- Views ---------------------
CREATE VIEW account_ext AS
SELECT a.id,
       a.household_id,
       a.name,
      (SELECT count(*)
       FROM record r
       WHERE r.account_id = a.id) AS record_count
FROM account a
ORDER BY a.name;

CREATE VIEW category_ext AS
SELECT c.id,
       c.name,
       c.category_group_id,
       g.name AS category_group_name,
       g.expense,
       g.exclude,
       g.household_id,
	   g.system,
      (SELECT count(*) FROM record r WHERE r.category_id = c.id) AS record_count,
      (SELECT count(*) FROM rule r WHERE r.category_id = c.id) AS rule_count
FROM category c,
     category_group g
WHERE c.category_group_id = g.id
ORDER BY g.name, c.name;

CREATE VIEW category_group_rownum AS
SELECT id,
      (SELECT count(*) FROM category_group g2 WHERE g2.id < g1.id) AS rownum
FROM category_group g1
ORDER BY g1.id ASC;

CREATE VIEW category_rownum AS
SELECT id,
      (SELECT count(*) FROM category AS c2 WHERE c2.id < c1.id) AS rownum,
       category_group_id,
      (SELECT count(*)
       FROM category AS c2
       WHERE c2.id < c1.id
       AND c2.category_group_id = c1.category_group_id) AS group_rownum
FROM category c1
ORDER BY c1.id ASC;

CREATE VIEW rule_sort AS
SELECT r.*,
       ifnull(r.sort_order, g.rownum * (SELECT ((max(group_rownum) / 100) + 1) * 100 FROM category_rownum) + c.group_rownum) AS sort_order_auto
FROM rule r,
     category_rownum c,
     category_group_rownum g
WHERE r.category_id = c.id
AND c.category_group_id = g.id
ORDER BY sort_order_auto ASC, r.regex ASC;

CREATE VIEW rule_ext AS
SELECT r.id,
       r.regex,
       r.category_id,
       r.sort_order,
       r.sort_order_auto,
       r.household_id,
       c.name AS category_name,
       c.category_group_id,
       g.name AS category_group_name,
       g.expense,
       (SELECT count(*)
        FROM record_ext re
        WHERE re.label LIKE r.regex
        AND re.expense = g.expense
        AND re.system = 1
		AND (r.account_id IS null OR re.account_id = r.account_id)
        AND re.household_id = r.household_id
       ) AS matches_default_category,
       (SELECT count(*)
        FROM record_ext re
        WHERE re.label LIKE r.regex
        AND re.expense = g.expense
        AND re.category_id = r.category_id
		AND (r.account_id IS null OR re.account_id = r.account_id)
        AND re.household_id = r.household_id
       ) AS matches_current_category,
       (SELECT count(*)
        FROM record_ext re
        WHERE re.label LIKE r.regex
        AND re.expense = g.expense
        AND re.system = 0
        AND re.category_id != r.category_id
		AND (r.account_id IS null OR re.account_id = r.account_id)
        AND re.household_id = r.household_id
       ) AS matches_other_category
FROM rule_sort r,
     category c,
     category_group g
WHERE r.category_id = c.id
AND c.category_group_id = g.id;

CREATE VIEW record_ext AS
SELECT r.*,
       datetime(year || '-' || (month/10) || (month%10) || '-' || (day/10) || (day%10) ) AS date,
       year || '-' || (month/10) || (month%10) AS period,
       a.name AS account_name,
       a.household_id,
       c.name AS category_name,
       c.category_group_id,
       g.name AS category_group_name,
       g.exclude,
	   g.system
FROM record r,
     account a,
     category_group g,
     category c
WHERE r.account_id = a.id
AND r.category_id = c.id
AND c.category_group_id = g.id
ORDER BY r.year DESC, r.month DESC, r.day DESC, r.label ASC;

CREATE VIEW record_valid AS
SELECT r.*
FROM record_ext r
WHERE r.exclude = 0;

CREATE VIEW record_default_category AS
SELECT r.label,
       count(*) AS occurences,
       min(r.amount) AS amount_min,
       max(r.amount) AS amount_max,
       avg(r.amount) AS amount_avg,
       sum(r.amount) AS amount_sum,
       r.expense,
       r.household_id
FROM record_ext r
WHERE r.system = 1
GROUP BY r.label, r.expense, r.household_id
ORDER BY occurences DESC;

CREATE VIEW stat_month_totals AS
SELECT year,
       month,
       expense,
       account_name,
       sum(amount) AS amount,
       household_id
FROM record_valid
GROUP BY year, month, expense, account_id, household_id
ORDER BY year, month, expense, account_name;

CREATE VIEW stat_month_plus AS
SELECT year,
       month,
       sum( ((expense - 1) * -amount) + (expense * -amount) ) AS amount,
       household_id
FROM record_valid
GROUP BY year, month, household_id
ORDER BY year, month;

CREATE VIEW stat_month_sum1 AS
SELECT household_id,
       year,
       expense,
       sum(amount) AS amount
FROM record_valid
GROUP BY household_id, year, expense
ORDER BY amount;

CREATE VIEW stat_month_sum2 AS
SELECT household_id,
       year,
       expense,
       category_group_id,
       category_group_name,
       sum(amount) AS amount
FROM record_valid
GROUP BY household_id, year, expense, category_group_id
ORDER BY amount;

CREATE VIEW stat_month_sum3 AS
SELECT household_id,
       year,
       expense,
       category_group_id,
       category_group_name,
       category_id,
       category_name,
       sum(amount) AS amount
FROM record_valid
GROUP BY household_id, year, expense, category_group_id, category_id
ORDER BY amount;

CREATE VIEW stat_category_details AS
SELECT year,
       month,
       category_group_id,
       category_group_name,
       category_id,
       category_name,
       sum(amount) AS amount,
       household_id
FROM record_valid
GROUP BY year, month, category_id
ORDER BY year, month;