CREATE TABLE materials (
	id INTEGER NOT NULL,
	code VARCHAR(80) NOT NULL,
	spec VARCHAR(300),
	unit VARCHAR(20),
	price FLOAT,
	active BOOLEAN,
	PRIMARY KEY (id)
)

;

CREATE TABLE suppliers (
	id INTEGER NOT NULL,
	code VARCHAR(50),
	name VARCHAR(200) NOT NULL,
	contact VARCHAR(50),
	phone VARCHAR(50),
	tax_no VARCHAR(80),
	bank_name VARCHAR(120),
	bank_account VARCHAR(80),
	payment_terms VARCHAR(120),
	active BOOLEAN,
	PRIMARY KEY (id)
)

;

CREATE TABLE users (
	id INTEGER NOT NULL,
	username VARCHAR(50) NOT NULL,
	password_hash VARCHAR(200) NOT NULL,
	name VARCHAR(50) NOT NULL,
	role VARCHAR(20) NOT NULL,
	active BOOLEAN,
	created_at DATETIME,
	PRIMARY KEY (id),
	UNIQUE (username)
)

;

CREATE TABLE orders (
	id INTEGER NOT NULL,
	order_no VARCHAR(50) NOT NULL,
	doc_type VARCHAR(20) NOT NULL,
	supplier_name VARCHAR(200),
	supplier_contact VARCHAR(50),
	supplier_phone VARCHAR(50),
	supplier_tax_no VARCHAR(80),
	supplier_bank_name VARCHAR(120),
	supplier_bank_account VARCHAR(80),
	payment_terms VARCHAR(120),
	our_company VARCHAR(200),
	our_contact VARCHAR(50),
	our_phone VARCHAR(50),
	our_tax_no VARCHAR(80),
	tax_rate VARCHAR(30),
	order_date VARCHAR(20),
	delivery_place VARCHAR(300),
	note TEXT,
	total_amount FLOAT,
	status VARCHAR(20),
	created_by INTEGER,
	created_by_name VARCHAR(50),
	created_at DATETIME,
	submitted_at DATETIME,
	reviewed_by VARCHAR(50),
	reviewed_at DATETIME,
	approved_by VARCHAR(50),
	approved_at DATETIME,
	reject_reason TEXT,
	PRIMARY KEY (id),
	FOREIGN KEY(created_by) REFERENCES users (id)
)

;

CREATE TABLE approval_logs (
	id INTEGER NOT NULL,
	order_id INTEGER,
	action VARCHAR(50),
	user_name VARCHAR(50),
	comment TEXT,
	created_at DATETIME,
	PRIMARY KEY (id),
	FOREIGN KEY(order_id) REFERENCES orders (id)
)

;

CREATE TABLE order_items (
	id INTEGER NOT NULL,
	order_id INTEGER,
	seq INTEGER,
	material_code VARCHAR(80),
	material_spec VARCHAR(300),
	unit VARCHAR(20),
	qty FLOAT,
	price FLOAT,
	amount FLOAT,
	delivery_date VARCHAR(30),
	remark VARCHAR(200),
	PRIMARY KEY (id),
	FOREIGN KEY(order_id) REFERENCES orders (id)
)

;