-- Seed a FOOD-focused category skeleton.
-- Structure = GS1 GPC backbone (segment/family/class) mapped to a self-built
-- Chinese tree. ltree labels are english slugs (ltree forbids spaces/CJK);
-- Chinese names live in name_zh. gpc_brick_code on leaves is a representative
-- starter value to be replaced by a full official GPC import later.

-- Root segment: Food/Beverage/Tobacco (GPC segment 50000000)
INSERT INTO category (name_zh, name_en, parent_id, path, gpc_brick_code, level)
VALUES ('食品饮料', 'Food/Beverage', NULL, 'food', '50000000', 0);

-- Families (level 1)
INSERT INTO category (name_zh, name_en, parent_id, path, gpc_brick_code, level)
SELECT v.name_zh, v.name_en, c.id, v.path::ltree, v.code, 1
FROM (VALUES
    ('饮料',     'Beverages',        'food.beverages',  '50130000'),
    ('乳制品蛋类','Dairy/Eggs',       'food.dairy',      '50180000'),
    ('烘焙',     'Bakery',           'food.bakery',     '50100000'),
    ('零食',     'Snacks',           'food.snacks',     '50190000'),
    ('粮油',     'Staples/Oils',     'food.staple',     '50160000'),
    ('调味品',   'Condiments',       'food.condiments', '50170000')
) AS v(name_zh, name_en, path, code)
JOIN category c ON c.path = 'food';

-- Classes / leaves (level 2) with representative GPC brick codes
INSERT INTO category (name_zh, name_en, parent_id, path, gpc_brick_code, level)
SELECT v.name_zh, v.name_en, c.id, v.path::ltree, v.code, 2
FROM (VALUES
    ('包装饮用水', 'Bottled water',   'food.beverages.water',      '10000224', 'food.beverages'),
    ('碳酸饮料',   'Carbonated',      'food.beverages.carbonated', '10000225', 'food.beverages'),
    ('果汁',       'Juice',           'food.beverages.juice',      '10000226', 'food.beverages'),
    ('牛奶',       'Milk',            'food.dairy.milk',           '10000158', 'food.dairy'),
    ('酸奶',       'Yogurt',          'food.dairy.yogurt',         '10000159', 'food.dairy'),
    ('奶酪',       'Cheese',          'food.dairy.cheese',         '10000160', 'food.dairy'),
    ('面包',       'Bread',           'food.bakery.bread',         '10000040', 'food.bakery'),
    ('饼干',       'Biscuits',        'food.bakery.biscuits',      '10000041', 'food.bakery'),
    ('薯片膨化',   'Chips/Snacks',    'food.snacks.chips',         '10000310', 'food.snacks'),
    ('巧克力',     'Chocolate',       'food.snacks.chocolate',     '10000311', 'food.snacks'),
    ('大米',       'Rice',            'food.staple.rice',          '10000500', 'food.staple'),
    ('面条',       'Noodles',         'food.staple.noodles',       '10000501', 'food.staple'),
    ('食用油',     'Cooking oil',     'food.staple.cooking_oil',   '10000502', 'food.staple'),
    ('酱油',       'Soy sauce',       'food.condiments.soy_sauce', '10000600', 'food.condiments'),
    ('食盐',       'Table salt',      'food.condiments.salt',      '10000601', 'food.condiments')
) AS v(name_zh, name_en, path, code, parent_path)
JOIN category c ON c.path = v.parent_path::ltree;

-- Parameter templates: leaf food categories use per_100g/ml nutrition basis.
INSERT INTO category_schema (category_id, required_attributes, recommended_attributes, nutriment_basis)
SELECT id,
       ARRAY['net_content'],
       ARRAY['energy','proteins','fat','carbohydrates','sugars','salt'],
       CASE WHEN path <@ 'food.beverages' THEN 'per_100ml' ELSE 'per_100g' END
FROM category
WHERE level = 2;