-- Users and Roles
-- This migration creates user-related tables with clean separation

-- =============================================
-- 1. ROLES TABLE
-- =============================================

CREATE TABLE IF NOT EXISTS public.roles (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    name TEXT NOT NULL UNIQUE,
    description TEXT,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- =============================================
-- 2. USER PROFILES TABLE
-- =============================================

CREATE TABLE IF NOT EXISTS public.user_profiles (
    id UUID PRIMARY KEY REFERENCES auth.users(id) ON DELETE CASCADE,
    email TEXT NOT NULL UNIQUE,
    first_name TEXT,
    last_name TEXT,
    status TEXT NOT NULL DEFAULT 'active' CHECK (status IN ('active', 'inactive', 'suspended')),
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- =============================================
-- 3. USER ROLES JUNCTION TABLE
-- =============================================

CREATE TABLE IF NOT EXISTS public.user_roles (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id UUID NOT NULL REFERENCES public.user_profiles(id) ON DELETE CASCADE,
    role_id UUID NOT NULL REFERENCES public.roles(id) ON DELETE CASCADE,
    assigned_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    assigned_by UUID REFERENCES public.user_profiles(id),
    UNIQUE(user_id, role_id)
);

-- =============================================
-- 4. INDEXES FOR PERFORMANCE
-- =============================================

CREATE INDEX IF NOT EXISTS idx_user_profiles_email ON public.user_profiles(email);
CREATE INDEX IF NOT EXISTS idx_user_roles_user_id ON public.user_roles(user_id);
CREATE INDEX IF NOT EXISTS idx_user_roles_role_id ON public.user_roles(role_id);

-- =============================================
-- 5. TRIGGERS
-- =============================================

-- Create trigger for updated_at on user_profiles
CREATE TRIGGER set_updated_at_user_profiles
    BEFORE UPDATE ON public.user_profiles
    FOR EACH ROW
    EXECUTE FUNCTION public.handle_updated_at();

-- Create trigger for updated_at on roles
CREATE TRIGGER set_updated_at_roles
    BEFORE UPDATE ON public.roles
    FOR EACH ROW
    EXECUTE FUNCTION public.handle_updated_at();

-- =============================================
-- 6. GRANT PERMISSIONS
-- =============================================

GRANT ALL ON public.roles TO authenticated;
GRANT ALL ON public.user_profiles TO authenticated;
GRANT ALL ON public.user_roles TO authenticated;

-- =============================================
-- 7. ENABLE ROW LEVEL SECURITY
-- =============================================

ALTER TABLE public.roles ENABLE ROW LEVEL SECURITY;
ALTER TABLE public.user_profiles ENABLE ROW LEVEL SECURITY;
ALTER TABLE public.user_roles ENABLE ROW LEVEL SECURITY;

-- =============================================
-- 8. CREATE RLS POLICIES
-- =============================================

-- Create RLS policies for roles (read-only for all authenticated users)
CREATE POLICY "Roles are viewable by authenticated users" ON public.roles
    FOR SELECT USING (auth.role() = 'authenticated');

-- Create RLS policies for user_profiles
CREATE POLICY "User profiles are viewable by authenticated users" ON public.user_profiles
    FOR SELECT USING (auth.role() = 'authenticated');

CREATE POLICY "User profiles are insertable by authenticated users" ON public.user_profiles
    FOR INSERT WITH CHECK (auth.role() = 'authenticated');

CREATE POLICY "User profiles are updatable by authenticated users" ON public.user_profiles
    FOR UPDATE USING (auth.role() = 'authenticated');

CREATE POLICY "User profiles are deletable by authenticated users" ON public.user_profiles
    FOR DELETE USING (auth.role() = 'authenticated');

-- Create RLS policies for user_roles
CREATE POLICY "User roles are viewable by authenticated users" ON public.user_roles
    FOR SELECT USING (auth.role() = 'authenticated');

CREATE POLICY "User roles are insertable by authenticated users" ON public.user_roles
    FOR INSERT WITH CHECK (auth.role() = 'authenticated');

CREATE POLICY "User roles are updatable by authenticated users" ON public.user_roles
    FOR UPDATE USING (auth.role() = 'authenticated');

CREATE POLICY "User roles are deletable by authenticated users" ON public.user_roles
    FOR DELETE USING (auth.role() = 'authenticated');