-- =============================================================================
-- MICHANGARRITO - 17 STORAGE (MCH-029: Infraestructura SaaS)
-- =============================================================================
-- Sistema de almacenamiento de archivos multi-tenant
-- Integra con: S3, Cloudflare R2, o almacenamiento local
-- =============================================================================

-- Buckets de almacenamiento
CREATE TABLE IF NOT EXISTS storage.buckets (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

    name VARCHAR(100) NOT NULL UNIQUE,
    description TEXT,

    -- Configuracion
    public BOOLEAN DEFAULT false,
    file_size_limit INTEGER,  -- bytes, null = sin limite
    allowed_mime_types TEXT[],

    -- Metadata
    created_at TIMESTAMPTZ DEFAULT NOW(),
    updated_at TIMESTAMPTZ DEFAULT NOW()
);

CREATE TRIGGER update_storage_buckets_updated_at
    BEFORE UPDATE ON storage.buckets
    FOR EACH ROW EXECUTE FUNCTION update_updated_at();

COMMENT ON TABLE storage.buckets IS 'Buckets de almacenamiento (contenedores)';
COMMENT ON COLUMN storage.buckets.file_size_limit IS 'Limite de tamaño por archivo en bytes';
COMMENT ON COLUMN storage.buckets.allowed_mime_types IS 'Array de MIME types permitidos';

-- Archivos almacenados
CREATE TABLE IF NOT EXISTS storage.files (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    tenant_id UUID NOT NULL REFERENCES public.tenants(id) ON DELETE CASCADE,
    bucket_id UUID NOT NULL REFERENCES storage.buckets(id) ON DELETE CASCADE,

    -- Identificacion
    name VARCHAR(255) NOT NULL,
    path VARCHAR(500) NOT NULL,

    -- Propiedades del archivo
    mime_type VARCHAR(100),
    size INTEGER NOT NULL,
    checksum VARCHAR(64),  -- SHA-256

    -- Metadata adicional
    metadata JSONB DEFAULT '{}',

    -- Control de acceso
    is_public BOOLEAN DEFAULT false,

    -- Referencias
    uploaded_by UUID REFERENCES auth.users(id) ON DELETE SET NULL,

    -- Timestamps
    created_at TIMESTAMPTZ DEFAULT NOW(),
    updated_at TIMESTAMPTZ DEFAULT NOW(),

    -- Constraints
    UNIQUE(bucket_id, path)
);

CREATE INDEX idx_storage_files_tenant ON storage.files(tenant_id);
CREATE INDEX idx_storage_files_bucket ON storage.files(bucket_id);
CREATE INDEX idx_storage_files_path ON storage.files(path);
CREATE INDEX idx_storage_files_mime ON storage.files(mime_type);

CREATE TRIGGER update_storage_files_updated_at
    BEFORE UPDATE ON storage.files
    FOR EACH ROW EXECUTE FUNCTION update_updated_at();

COMMENT ON TABLE storage.files IS 'Archivos almacenados por tenant';
COMMENT ON COLUMN storage.files.path IS 'Ruta completa del archivo: tenant_id/bucket/filename';
COMMENT ON COLUMN storage.files.metadata IS 'Metadata adicional: {width, height, duration, etc.}';

-- URLs firmadas (para acceso temporal)
CREATE TABLE IF NOT EXISTS storage.signed_urls (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    file_id UUID NOT NULL REFERENCES storage.files(id) ON DELETE CASCADE,

    -- Token y expiracion
    token VARCHAR(255) NOT NULL UNIQUE,
    expires_at TIMESTAMPTZ NOT NULL,

    -- Restricciones
    max_downloads INTEGER,
    downloads_count INTEGER DEFAULT 0,

    -- Metadata
    created_at TIMESTAMPTZ DEFAULT NOW(),
    created_by UUID REFERENCES auth.users(id) ON DELETE SET NULL
);

CREATE INDEX idx_storage_signed_urls_token ON storage.signed_urls(token);
CREATE INDEX idx_storage_signed_urls_expires ON storage.signed_urls(expires_at);

COMMENT ON TABLE storage.signed_urls IS 'URLs firmadas para acceso temporal a archivos privados';

-- =============================================================================
-- SEEDS: Buckets por defecto
-- =============================================================================

INSERT INTO storage.buckets (name, description, public, file_size_limit, allowed_mime_types) VALUES
    ('products', 'Imagenes de productos', true, 5242880, ARRAY['image/jpeg', 'image/png', 'image/webp']),
    ('avatars', 'Fotos de perfil de usuarios', true, 1048576, ARRAY['image/jpeg', 'image/png']),
    ('documents', 'Documentos privados', false, 10485760, ARRAY['application/pdf', 'image/jpeg', 'image/png']),
    ('exports', 'Archivos de exportacion (reportes)', false, 52428800, ARRAY['application/pdf', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'text/csv']),
    ('backups', 'Backups de datos', false, NULL, NULL)
ON CONFLICT (name) DO NOTHING;