-- Delete tables if they exist
DROP TABLE IF EXISTS product CASCADE;
DROP TABLE IF EXISTS image CASCADE;
DROP TABLE IF EXISTS color CASCADE;
DROP TABLE IF EXISTS store CASCADE;
DROP TABLE IF EXISTS personal CASCADE;
DROP TABLE IF EXISTS permissions CASCADE;
DROP TABLE IF EXISTS boss CASCADE;
DROP TABLE IF EXISTS employees CASCADE;
DROP TABLE IF EXISTS client CASCADE;
DROP TABLE IF EXISTS delivery_address CASCADE;
DROP TABLE IF EXISTS order CASCADE;
DROP TABLE IF EXISTS report CASCADE;
DROP TABLE IF EXISTS monthly_profit CASCADE;
DROP TABLE IF EXISTS request CASCADE;
DROP TABLE IF EXISTS makes_request CASCADE;
DROP TABLE IF EXISTS answers CASCADE;
DROP TABLE IF EXISTS for_store CASCADE;
DROP TABLE IF EXISTS review CASCADE;
DROP TABLE IF EXISTS change CASCADE;
DROP TABLE IF EXISTS makes_change CASCADE;
--  DROP TABLE IF EXISTS made_on CASCADE;
DROP TABLE IF EXISTS works_in_store CASCADE;
DROP TABLE IF EXISTS worked CASCADE;
DROP TABLE IF EXISTS sells CASCADE;
DROP TABLE IF EXISTS includes CASCADE;
DROP TABLE IF EXISTS approves CASCADE;
DROP TABLE IF EXISTS exchanges_data CASCADE;


-- Table 1
-- Create PRODUCT table
CREATE TABLE product (
    code SERIAL PRIMARY KEY,                      -- In format 3 digits for store, 5 digits for product (Total 8 digits). Ex. 00100155, 01500020,...
    price NUMERIC NOT NULL CHECK (price >= 0),
    availability INTEGER NOT NULL,
    weight NUMERIC NOT NULL CHECK (weight > 0),
    width_x_length_x_depth VARCHAR(20) NOT NULL, 
    aprox_production_time INTEGER NOT NULL,
    description VARCHAR(1000) NOT NULL
);

-- Table 2
-- Create IMAGE table
CREATE TABLE image(
    product_code VARCHAR PRIMARY KEY REFERENCES product(code)
        ON DELETE CASCADE,
    image VARCHAR NOT NULL DEFAULT 'Image NOT found!'
);

-- Table 3
-- Create COLOR table
CREATE TABLE color (
    product_code VARCHAR PRIMARY NULL REFERENCES product(code) 
        ON DELETE CASCADE,
    color VARCHAR(50)
);

-- Table 4
-- Create STORE table
CREATE TABLE store (
    store_ID SERIAL PRIMARY KEY,             -- In the format of 3 digits. Example : 001, 101, 567, 996,...
    name VARCHAR(50) UNIQUE NOT NULL,
    date_of_founding DATE NOT NULL,
    physical_address VARCHAR(100) NOT NULL,   -- ADDRESS FORMAT : st.(st-name) num.(unit-num), (city) (post-code), (country)?????
    store_email VARCHAR(20) UNIQUE NOT NULL,
    rating NUMERIC NOT NULL DEFAULT 0 CHECK (rating>=0.0) 
);

-- Table 5
-- Create PERSONAL table
CREATE TABLE personal (
    ssn VARCHAR(13) PRIMARY KEY,                                     -- Format 13 digits :   0101001451001, 1209995423736,...
    first_name VARCHAR(20) NOT NULL,
    last_name VARCHAR(20) NOT NULL,
    email VARCHAR(50) UNIQUE NOT NULL,
    password VARCHAR NOT NULL
);

-- Table 6
-- Create PERMISSIONS table
CREATE TABLE permissions (
    personal_SSN VARCHAR(13) PRIMARY KEY REFERENCES personal(ssn)
        ON DELETE CASCADE,
    type VARCHAR(100) UNIQUE NOT NULL,
    authorisation VARCHAR(50) NOT NULL
);

-- Table 7
-- Create BOSS table
CREATE TABLE boss (
    boss_SSN VARCHAR(13) PRIMARY KEY REFERENCES personal(ssn)
        ON DELETE CASCADE
);

-- Table 8
-- Create EMPLOYEES table
CREATE TABLE employees (
    employee_SSN VARCHAR(13) PRIMARY KEY REFERENCES personal(ssn)
        ON DELETE CASCADE,
    date_of_hire DATE NOT NULL
);

-- Table 9
-- Create CLIENT table
CREATE TABLE client (
    client_ID SERIAL PRIMARY KEY,                     -- Format, just an order of an integer, starting from 1000. EX : 1005, 1023,  1200, ...
    first_name VARCHAR(50) NOT NULL,
    last_name VARCHAR(50) NOT NULL,
    email VARCHAR(50) UNIQUE NOT NULL,
    password VARCHAR NOT NULL
);

-- Table 10
-- Create DELIVERY_ADDRESS table
CREATE TABLE delivery_address (
    client_ID INTEGER PRIMARY KEY REFERENCES client(client_ID)
        ON DELETE CASCADE,
    address VARCHAR(100) NOT NULL -- ADDRESS FORMAT : st.(st-name) num.(unit-num), (city) (post-code), (country)?????
);

-- Table 11
-- Create ORDER table
CREATE TABLE "order" (
    order_num SERIAL PRIMARY KEY,                   -- In the format: 3 digits for store ID, 2 digits for year when order is placed, 5 digits for the number of order for that store in that year
    client_ID INTEGER REFERENCES client(client_ID)
        ON DELETE CASCADE,
    quantity INTEGER NOT NULL,
    status VARCHAR(20) NOT NULL DEFAULT 'placed order',
    last_date_mod TIMESTAMP NOT NULL,
    payment_method VARCHAR (250) NOT NULL,
    discount NUMERIC DEFAULT 0.0
);

-- Table 12
-- Create REPORT table
CREATE TABLE report (
    date TIMESTAMP NOT NULL,
    store_ID VARCHAR(3) NOT NULL REFERENCES store(store_ID)
        ON DELETE CASCADE,
    overall_profit NUMERIC NOT NULL DEFAULT 0.0 CHECK(overall_profit>=0),
    sales_trend VARCHAR NOT NULL,
    marketing_growth VARCHAR NOT NULL,
    owner_signature VARCHAR(30) NOT NULL,
    PRIMARY KEY (date, store_ID)
);

-- Table 13
-- Create MONTHLY_PROFIT table
CREATE TABLE monthly_profit (
    report_date TIMESTAMP NOT NULL,
    store_ID VARCHAR(3) NOT NULL,
    month_and_year DATE NOT NULL,
    profit NUMERIC NOT NULL DEFAULT 0.0,
    PRIMARY KEY(report_date, store_ID),
    FOREIGN KEY (report_date, store_ID) REFERENCES report(date, store_ID) 
        ON DELETE CASCADE
);

-- Table 14
-- Create REQUEST table
CREATE TABLE request (
    request_num SERIAL PRIMARY KEY,                -- Format: 3 digits for store ID, 2 digits for month in which the request is placed, 2 digits for year, 3 digits for request number 
    date_and_time TIMESTAMP NOT NULL,
    problem VARCHAR(1000) NOT NULL,
    notes_of_communication VARCHAR(300),
    costumer_satisfaction NUMERIC NOT NULL 
);

-- Table 15
-- Create MAKES_REQUEST table
CREATE TABLE makes_request (
    client_ID INTEGER NOT NULL REFERENCES client(client_ID)
        ON DELETE CASCADE,
    order_num VARCHAR(10) UNIQUE NOT NULL REFERENCES "order"(order_num)
        ON DELETE CASCADE,
    PRIMARY KEY(client_ID, order_num)
);

-- Table 16
-- Create ANSWERS table
CREATE TABLE answers (
    request_num VARCHAR(10) REFERENCES request(request_num)
        ON DELETE CASCADE,
    personal_SSN VARCHAR(13) NOT NULL REFERENCES personal(ssn)
        ON DELETE CASCADE,
    PRIMARY KEY(request_num, personal_SSN)
);

-- Table 17
-- Create FOR_STORE table
CREATE TABLE for_store (
    request_num VARCHAR(10) REFERENCES request(request_num)
        ON DELETE CASCADE,
    store_ID VARCHAR(3) REFERENCES store(store_ID)
        ON DELETE CASCADE,
    PRIMARY KEY(request_num, store_ID)
);

-- Table 18
-- Create REVIEW table
CREATE TABLE review (
    order_num VARCHAR(10) REFERENCES "order"(order_num)
        ON DELETE CASCADE,               -- Should the review be deleted when the order is deleted?
    comment VARCHAR(300),
    rating NUMERIC NOT NULL,
    last_mod_date TIMESTAMP NOT NULL
);

-- Table 19
-- Create CHANGE table
CREATE TABLE "change" (
    date_and_time TIMESTAMP NOT NULL,
    product_code VARCHAR(8) REFERENCES product(code)
        ON DELETE CASCADE,
    changes VARCHAR NOT NULL,
    PRIMARY KEY (date_and_time, product_code)
);

-- Table 20
-- Create MAKES_CHANGE table
CREATE TABLE makes_change (
    personal_SSN VARCHAR(13) REFERENCES personal(ssn)
        ON DELETE CASCADE,
    change_date_time TIMESTAMP,
    product_code VARCHAR(8),
    PRIMARY KEY(personal_SSN, change_date_time, product_code),
    FOREIGN KEY (change_date_time, product_code) REFERENCES "change"(date_and_time, product_code)
        ON DELETE CASCADE
);

-- Table 22
-- Create WORKS_IN_STORE table
CREATE TABLE works_in_store (
    personal_SSN VARCHAR(13) REFERENCES personal(ssn)
        ON DELETE CASCADE,
    store_ID VARCHAR(3) REFERENCES store(store_ID)
        ON DELETE CASCADE,
    PRIMARY KEY(personal_SSN, store_ID)
);

-- Table 23
-- Create WORKED table
CREATE TABLE worked (
    personal_SSN VARCHAR(13) REFERENCES personal(ssn)
        ON DELETE CASCADE,                   
    report_date TIMESTAMP,
    store_ID VARCHAR(3),     
    wage NUMERIC NOT NULL CHECK (wage>=62),
    pay_method VARCHAR(20) DEFAULT 'hourly',
    total_hours NUMERIC NOT NULL,
    week VARCHAR(24) NOT NULL,
    PRIMARY KEY (personal_SSN, report_date, store_ID),
    FOREIGN KEY (report_date, store_ID) REFERENCES report(date, store_ID)
        ON DELETE CASCADE
);

-- Table 24
-- Create SELLS table
CREATE TABLE sells (
    product_code VARCHAR(8) REFERENCES product(code)
        ON DELETE CASCADE,
    store_ID VARCHAR(3) REFERENCES store(store_ID)
        ON DELETE CASCADE,
    discount NUMERIC NOT NULL DEFAULT 0.0,
    PRIMARY KEY (product_code, store_ID)
);

-- Table 25
-- Create INCLUDES table
CREATE TABLE includes (
    order_num VARCHAR(10) REFERENCES "order"(order_num)
        ON DELETE CASCADE,
    product_code VARCHAR(8) REFERENCES product(code)
        ON DELETE CASCADE,
    PRIMARY KEY (order_num, product_code)
);

-- Table 26
-- Create APPROVES table
CREATE TABLE approves (
    boss_SSN VARCHAR(13) REFERENCES boss(boss_SSN)
        ON DELETE CASCADE,
    report_date TIMESTAMP,
    store_ID VARCHAR(3),
    owner_signature VARCHAR NOT NULL, 
    PRIMARY KEY (boss_SSN, report_date, store_ID),
    FOREIGN KEY (report_date, store_ID) REFERENCES report(date, store_ID)
        ON DELETE CASCADE
);

-- Table 27
CREATE TABLE exchanges_data (
    report_date TIMESTAMP NOT NULL,
    store_ID VARCHAR(3) NOT NULL REFERENCES store(store_ID) 
        ON DELETE CASCADE,
    monthly_profit NUMERIC NOT NULL DEFAULT 0.0,
    date TIMESTAMP NOT NULL,
    sales NUMERIC NOT NULL,                                          -- Total profit achieved in sells                   
    damages NUMERIC NOT NULL DEFAULT 0.0 CHECK (damages>=0),         -- Total loss in damages/refunds
    FOREIGN KEY (report_date, store_ID) REFERENCES report(date, store_ID) 
        ON DELETE CASCADE,
    PRIMARY KEY (report_date, store_ID)
);