-- TimeTracker Database Initialization Script
-- This script runs when the PostgreSQL container starts for the first time

-- Create extensions if they don't exist
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

-- Create the database schema
CREATE TABLE IF NOT EXISTS users (
    id SERIAL PRIMARY KEY,
    username VARCHAR(50) UNIQUE NOT NULL,
    email VARCHAR(100) UNIQUE,
    password_hash VARCHAR(255) NOT NULL,
    is_active BOOLEAN DEFAULT true,
    is_admin BOOLEAN DEFAULT false,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS projects (
    id SERIAL PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    description TEXT,
    color VARCHAR(7) DEFAULT '#007bff',
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS tasks (
    id SERIAL PRIMARY KEY,
    name VARCHAR(200) NOT NULL,
    description TEXT,
    project_id INTEGER REFERENCES projects(id) ON DELETE CASCADE,
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS time_entries (
    id SERIAL PRIMARY KEY,
    user_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
    task_id INTEGER REFERENCES tasks(id) ON DELETE CASCADE,
    start_time TIMESTAMP NOT NULL,
    end_time TIMESTAMP,
    duration_minutes INTEGER,
    description TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS settings (
    id SERIAL PRIMARY KEY,
    key VARCHAR(100) UNIQUE NOT NULL,
    value TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Create indexes for better performance
CREATE INDEX IF NOT EXISTS idx_time_entries_user_id ON time_entries(user_id);
CREATE INDEX IF NOT EXISTS idx_time_entries_task_id ON time_entries(task_id);
CREATE INDEX IF NOT EXISTS idx_time_entries_start_time ON time_entries(start_time);
CREATE INDEX IF NOT EXISTS idx_tasks_project_id ON tasks(project_id);

-- Insert default admin user (password: admin)
INSERT INTO users (username, email, password_hash, is_admin) 
VALUES ('admin', 'admin@timetracker.local', '$2b$12$LQv3c1yqBWVHxkd0LHAkCOYz6TtxMQJqhN8/LewdBPj/RK.s5uO.G', true)
ON CONFLICT (username) DO NOTHING;

-- Insert default project
INSERT INTO projects (name, description, color) 
VALUES ('General', 'Default project for general tasks', '#007bff')
ON CONFLICT DO NOTHING;

-- Insert default task
INSERT INTO tasks (name, description, project_id) 
VALUES ('General Task', 'Default task for time tracking', 1)
ON CONFLICT DO NOTHING;

-- Insert default settings
INSERT INTO settings (key, value) VALUES
('currency', 'EUR'),
('timezone', 'Europe/Brussels'),
('rounding_minutes', '1'),
('single_active_timer', 'true'),
('allow_self_register', 'true'),
('idle_timeout_minutes', '30')
ON CONFLICT (key) DO NOTHING;

-- Create function to update updated_at timestamp
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ language 'plpgsql';

-- Create triggers to automatically update updated_at
CREATE TRIGGER update_users_updated_at BEFORE UPDATE ON users FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_projects_updated_at BEFORE UPDATE ON projects FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_tasks_updated_at BEFORE UPDATE ON tasks FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_time_entries_updated_at BEFORE UPDATE ON time_entries FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER update_settings_updated_at BEFORE UPDATE ON settings FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Grant permissions
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO timetracker;
GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public TO timetracker;
GRANT ALL PRIVILEGES ON ALL FUNCTIONS IN SCHEMA public TO timetracker;