-- Initial database schema

-- Services table
CREATE TABLE IF NOT EXISTS services (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    url VARCHAR(500) NOT NULL,
    logo_url VARCHAR(500),
    policy_url VARCHAR(500),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Policy versions table
CREATE TABLE IF NOT EXISTS policy_versions (
    id SERIAL PRIMARY KEY,
    service_id INTEGER REFERENCES services(id) ON DELETE CASCADE,
    content TEXT NOT NULL,
    content_hash VARCHAR(64) NOT NULL,
    fetched_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Analyses table
CREATE TABLE IF NOT EXISTS analyses (
    id SERIAL PRIMARY KEY,
    service_id INTEGER REFERENCES services(id) ON DELETE CASCADE,
    policy_version_id INTEGER REFERENCES policy_versions(id) ON DELETE CASCADE,
    overall_score VARCHAR(1) NOT NULL CHECK (overall_score IN ('A', 'B', 'C', 'D', 'E')),
    findings JSONB NOT NULL,
    raw_analysis TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Admin sessions table
CREATE TABLE IF NOT EXISTS admin_sessions (
    id SERIAL PRIMARY KEY,
    session_token VARCHAR(255) UNIQUE NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    expires_at TIMESTAMP NOT NULL
);

-- Indexes for performance
CREATE INDEX IF NOT EXISTS idx_services_name ON services(name);
CREATE INDEX IF NOT EXISTS idx_analyses_service_id ON analyses(service_id);
CREATE INDEX IF NOT EXISTS idx_analyses_score ON analyses(overall_score);
CREATE INDEX IF NOT EXISTS idx_policy_versions_service_id ON policy_versions(service_id);
CREATE INDEX IF NOT EXISTS idx_admin_sessions_token ON admin_sessions(session_token);
CREATE INDEX IF NOT EXISTS idx_admin_sessions_expires ON admin_sessions(expires_at);