WITH material_lookup(material, score) AS (
    (VALUES
        ('metal', 0.15),
        ('wood', 1),
        ('resin', 0),
        ('fabric', 0.5),
        ('plastic', 0.25)
    )
),

origin_lookup(origin, score) AS (
    (VALUES
        ('usa', 1),
        ('imported', 0),
        ('mixed', 0.5)
    )
),

unnested_materials AS (
    SELECT
        primary_category,
        unnest(materials) unnested_material
    FROM {{ params.products_table }}
),

material_scores AS (
    SELECT
        primary_category,
        AVG(material_lookup.score) AS score
    FROM unnested_materials
    JOIN material_lookup
    ON unnested_materials.unnested_material = material_lookup.material
    GROUP BY primary_category
),

scores AS (
    SELECT
        tcin,
        material_scores.score AS material_score,
        weight * 0.75 AS weight_score,
        packaging * 0.6 AS packaging_score,
        origin_lookup.score AS origin_score
    FROM {{ params.products_table }} AS products
    LEFT JOIN material_scores USING (primary_category)
    LEFT JOIN origin_lookup USING (origin)
)

INSERT INTO {{ params.scored_table }}
SELECT
  tcin,
  material_score,
  weight_score,
  packaging_score,
  origin_score,
  material_score + weight_score + packaging_score + origin_score AS score
FROM scores;