-- Create enum for skill levels
CREATE TYPE skill_level_enum AS ENUM ('never', 'not-autonomous', 'autonomous', 'expert');

-- Users table
CREATE TABLE users (
    id SERIAL PRIMARY KEY,
    first_name VARCHAR(100) NOT NULL,
    last_name VARCHAR(100) NOT NULL,
    team_id VARCHAR(50) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- User evaluations table
CREATE TABLE user_evaluations (
    id SERIAL PRIMARY KEY,
    user_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
    last_updated TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(user_id)
);

-- Category evaluations table
CREATE TABLE category_evaluations (
    id SERIAL PRIMARY KEY,
    user_evaluation_id INTEGER REFERENCES user_evaluations(id) ON DELETE CASCADE,
    category VARCHAR(100) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(user_evaluation_id, category)
);

-- Selected skills table (skills the user wants to evaluate)
CREATE TABLE selected_skills (
    id SERIAL PRIMARY KEY,
    category_evaluation_id INTEGER REFERENCES category_evaluations(id) ON DELETE CASCADE,
    skill_id VARCHAR(100) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(category_evaluation_id, skill_id)
);

-- Skill evaluations table
CREATE TABLE skill_evaluations (
    id SERIAL PRIMARY KEY,
    category_evaluation_id INTEGER REFERENCES category_evaluations(id) ON DELETE CASCADE,
    skill_id VARCHAR(100) NOT NULL,
    level skill_level_enum NOT NULL,
    can_mentor BOOLEAN DEFAULT FALSE,
    wants_to_learn BOOLEAN DEFAULT FALSE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(category_evaluation_id, skill_id)
);

-- Indexes for performance
CREATE INDEX idx_users_team_id ON users(team_id);
CREATE INDEX idx_user_evaluations_user_id ON user_evaluations(user_id);
CREATE INDEX idx_category_evaluations_user_evaluation_id ON category_evaluations(user_evaluation_id);
CREATE INDEX idx_selected_skills_category_evaluation_id ON selected_skills(category_evaluation_id);
CREATE INDEX idx_skill_evaluations_category_evaluation_id ON skill_evaluations(category_evaluation_id);
CREATE INDEX idx_skill_evaluations_skill_id ON skill_evaluations(skill_id);

-- Update trigger for users table
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ language 'plpgsql';

CREATE TRIGGER update_users_updated_at BEFORE UPDATE ON users
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

CREATE TRIGGER update_skill_evaluations_updated_at BEFORE UPDATE ON skill_evaluations
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();