-- Инициализация базы данных ERP MVP

-- Создание расширений
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

-- Создание таблиц

-- Организации
CREATE TABLE IF NOT EXISTS organizations (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    name VARCHAR(255) NOT NULL,
    type VARCHAR(100),
    settings JSONB DEFAULT '{}',
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Пользователи
CREATE TABLE IF NOT EXISTS users (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    email VARCHAR(255) UNIQUE NOT NULL,
    password_hash VARCHAR(255) NOT NULL,
    role VARCHAR(50) DEFAULT 'user',
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Места хранения
CREATE TABLE IF NOT EXISTS storage_locations (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    parent_id UUID REFERENCES storage_locations(id) ON DELETE CASCADE,
    name VARCHAR(255) NOT NULL,
    address VARCHAR(100) NOT NULL,
    type VARCHAR(50) NOT NULL,
    coordinates JSONB DEFAULT '{}',
    qr_code VARCHAR(255),
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Товары
CREATE TABLE IF NOT EXISTS items (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    category VARCHAR(100),
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Размещение товаров
CREATE TABLE IF NOT EXISTS item_placements (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    item_id UUID NOT NULL REFERENCES items(id) ON DELETE CASCADE,
    location_id UUID NOT NULL REFERENCES storage_locations(id) ON DELETE CASCADE,
    quantity INTEGER DEFAULT 1,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Операции
CREATE TABLE IF NOT EXISTS operations (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    operation_type VARCHAR(50) NOT NULL,
    item_id UUID REFERENCES items(id) ON DELETE SET NULL,
    from_location_id UUID REFERENCES storage_locations(id) ON DELETE SET NULL,
    to_location_id UUID REFERENCES storage_locations(id) ON DELETE SET NULL,
    quantity INTEGER,
    user_id UUID REFERENCES users(id) ON DELETE SET NULL,
    metadata JSONB DEFAULT '{}',
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Создание индексов для производительности
CREATE INDEX IF NOT EXISTS idx_users_organization_id ON users(organization_id);
CREATE INDEX IF NOT EXISTS idx_users_email ON users(email);
CREATE INDEX IF NOT EXISTS idx_storage_locations_organization_id ON storage_locations(organization_id);
CREATE INDEX IF NOT EXISTS idx_storage_locations_parent_id ON storage_locations(parent_id);
CREATE INDEX IF NOT EXISTS idx_storage_locations_type ON storage_locations(type);
CREATE INDEX IF NOT EXISTS idx_items_organization_id ON items(organization_id);
CREATE INDEX IF NOT EXISTS idx_items_category ON items(category);
CREATE INDEX IF NOT EXISTS idx_item_placements_organization_id ON item_placements(organization_id);
CREATE INDEX IF NOT EXISTS idx_item_placements_item_id ON item_placements(item_id);
CREATE INDEX IF NOT EXISTS idx_item_placements_location_id ON item_placements(location_id);
CREATE INDEX IF NOT EXISTS idx_operations_organization_id ON operations(organization_id);
CREATE INDEX IF NOT EXISTS idx_operations_created_at ON operations(created_at);

-- Создание триггеров для автоматического обновления updated_at
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = NOW();
    RETURN NEW;
END;
$$ language 'plpgsql';

CREATE TRIGGER update_organizations_updated_at BEFORE UPDATE ON organizations
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

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

CREATE TRIGGER update_storage_locations_updated_at BEFORE UPDATE ON storage_locations
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

CREATE TRIGGER update_items_updated_at BEFORE UPDATE ON items
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

CREATE TRIGGER update_item_placements_updated_at BEFORE UPDATE ON item_placements
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Создание тестовых данных (опционально)
INSERT INTO organizations (id, name, type) VALUES 
    ('550e8400-e29b-41d4-a716-446655440000', 'Тестовая мастерская', 'workshop')
ON CONFLICT (id) DO NOTHING;

INSERT INTO users (id, organization_id, email, password_hash, role) VALUES 
    ('550e8400-e29b-41d4-a716-446655440001', '550e8400-e29b-41d4-a716-446655440000', 'admin@test.com', '$2a$10$example', 'admin')
ON CONFLICT (id) DO NOTHING;