DELETE FROM model_pricing_rules
WHERE resource_type = 'image_edit'
   OR rule_key = 'image_edit';

DELETE FROM model_pricing_rules old_rule
USING model_pricing_rules image_rule
WHERE old_rule.rule_set_id IS NOT DISTINCT FROM image_rule.rule_set_id
  AND old_rule.rule_key = 'image_generation'
  AND image_rule.rule_key = 'image';

UPDATE model_pricing_rules
SET rule_key = 'image',
    display_name = '图像',
    resource_type = 'image',
    unit = 'image',
    base_price = 10,
    base_weight = '{"meter":"count"}'::jsonb,
    dynamic_weight = '{"resolutionFactors":{"1K":1,"2K":1.5,"3K":1.75,"4K":2,"8K":4},"qualityFactors":{"low":0.5,"medium":1,"high":1.5}}'::jsonb,
    calculator_type = 'unit_weight',
    dimension_schema = '{"dimensions":["count","resolution","quality"],"defaults":{"count":1,"quality":"medium","resolution":"1K"}}'::jsonb,
    formula_config = '{"formula":"count * base_price * resolution_factor * quality_factor"}'::jsonb,
    priority = 30,
    metadata = metadata || '{"migration":"0008_pricing_image_single_rule"}'::jsonb,
    updated_at = now()
WHERE resource_type = 'image'
  AND rule_key IN ('image_generation', 'image');