-- Consolidated Bookmann Database Schema
-- This file contains the complete current schema for the Bookmann ebook management system

-- Create users table
CREATE TABLE users (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    email VARCHAR(255) UNIQUE NOT NULL,
    username VARCHAR(255) UNIQUE NOT NULL,
    password_hash VARCHAR(255) NOT NULL,
    first_name VARCHAR(255),
    last_name VARCHAR(255),
    role VARCHAR(20) NOT NULL DEFAULT 'user' CHECK (role IN ('admin', 'user')),
    theme VARCHAR(50) DEFAULT 'tokyo-night',
    scan_frequency_minutes INTEGER DEFAULT 60,
    auto_scan_enabled BOOLEAN DEFAULT true,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Create ebooks table
CREATE TABLE ebooks (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    title VARCHAR(255) NOT NULL,
    author VARCHAR(255),
    isbn VARCHAR(13),
    description TEXT,
    file_path VARCHAR(500) NOT NULL,
    file_size BIGINT,
    mime_type VARCHAR(100),
    cover_image_path VARCHAR(500),
    series VARCHAR(255),
    series_number INTEGER,
    tags TEXT,
    asin VARCHAR(20),
    date_published DATE,
    publisher VARCHAR(255),
    contributors TEXT,
    added_by_admin_id UUID REFERENCES users(id) ON DELETE SET NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Create reading_progress table
CREATE TABLE reading_progress (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    ebook_id UUID NOT NULL REFERENCES ebooks(id) ON DELETE CASCADE,
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    current_page INTEGER DEFAULT 0,
    total_pages INTEGER,
    last_read_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(ebook_id, user_id)
);

-- Create ebook_ratings table
CREATE TABLE ebook_ratings (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    ebook_id UUID NOT NULL REFERENCES ebooks(id) ON DELETE CASCADE,
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    rating INTEGER NOT NULL CHECK (rating >= 1 AND rating <= 10), -- 10-point scale for half-star precision
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(ebook_id, user_id)
);

-- Create user_ebook_folders table for multiple folders per user
CREATE TABLE user_ebook_folders (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    folder_path VARCHAR(500) NOT NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(user_id, folder_path),
    CONSTRAINT admin_only_folder CHECK (EXISTS (
        SELECT 1 FROM users WHERE id = user_id AND role = 'admin'
    ))
);

-- Create indexes for better query performance
CREATE INDEX idx_users_email ON users(email);
CREATE INDEX idx_users_username ON users(username);
CREATE INDEX idx_ebooks_title ON ebooks(title);
CREATE INDEX idx_ebooks_author ON ebooks(author);
CREATE INDEX idx_ebooks_added_by_admin_id ON ebooks(added_by_admin_id);
CREATE INDEX idx_reading_progress_ebook_id ON reading_progress(ebook_id);
CREATE INDEX idx_reading_progress_user_id ON reading_progress(user_id);
CREATE INDEX idx_ebook_ratings_ebook_id ON ebook_ratings(ebook_id);
CREATE INDEX idx_ebook_ratings_user_id ON ebook_ratings(user_id);
CREATE INDEX idx_user_ebook_folders_user_id ON user_ebook_folders(user_id);

-- Add comment explaining the rating system
COMMENT ON COLUMN ebook_ratings.rating IS 'Rating scale 1-10 (odd numbers = half-stars: 1,3,5,7,9 = 0.5,1.5,2.5,3.5,4.5 stars)';

-- Role System Notes:
-- - All users default to 'user' role
-- - Admin users can: add/edit/delete folders, scan ebooks, modify ebook metadata, delete ebooks
-- - Regular users can: view all ebooks, rate ebooks, track reading progress, manage their profile
-- - To create first admin: UPDATE users SET role = 'admin' WHERE email = 'your-admin-email';
-- - Only admins can manage folders and ebook metadata