CREATE DATABASE IF NOT EXISTS pbbfa24aal_habittracker
    CHARACTER SET utf8mb4
    COLLATE utf8mb4_unicode_ci;

USE pbbfa24aal_habittracker;

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(190) NOT NULL UNIQUE,
    password_hash VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE categories (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(80) NOT NULL,
    color VARCHAR(20) NOT NULL DEFAULT '#176b5b'
);

CREATE TABLE habits (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    category_id INT NULL,
    title VARCHAR(120) NOT NULL,
    description TEXT NULL,
    target_per_week TINYINT UNSIGNED NOT NULL DEFAULT 3,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE SET NULL
);

CREATE TABLE habit_logs (
    id INT AUTO_INCREMENT PRIMARY KEY,
    habit_id INT NOT NULL,
    completed_on DATE NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE KEY unique_habit_day (habit_id, completed_on),
    FOREIGN KEY (habit_id) REFERENCES habits(id) ON DELETE CASCADE
);

CREATE TABLE reminders (
    id INT AUTO_INCREMENT PRIMARY KEY,
    habit_id INT NOT NULL,
    reminder_time TIME NOT NULL,
    weekday TINYINT UNSIGNED NULL,
    is_active TINYINT(1) NOT NULL DEFAULT 1,
    FOREIGN KEY (habit_id) REFERENCES habits(id) ON DELETE CASCADE
);

INSERT INTO categories (name, color) VALUES
    ('Gesundheit', '#176b5b'),
    ('Lernen', '#365c9a'),
    ('Sport', '#b95c20'),
    ('Alltag', '#6b4ba3');