-- Migration 062: BLS/food catalog, typed attributes, FDDB mapping, nutrition items, day marks
-- Additive only. Official BLS rows upsert by bls_code / attr_key — never delete+reinsert.

CREATE TABLE IF NOT EXISTS food_attributes (
    id              SERIAL PRIMARY KEY,
    attr_key        VARCHAR(64) NOT NULL,
    name_de         VARCHAR(255) NOT NULL,
    name_en         VARCHAR(255),
    unit            VARCHAR(40),
    category        VARCHAR(80),
    data_type       VARCHAR(20) NOT NULL DEFAULT 'num_per_100g'
                    CHECK (data_type IN ('num_per_100g', 'boolean', 'text', 'enum')),
    enum_values     JSONB,
    origin          VARCHAR(20) NOT NULL DEFAULT 'official_bls'
                    CHECK (origin IN ('official_bls', 'extension')),
    sort_order      INT NOT NULL DEFAULT 0,
    is_active       BOOLEAN NOT NULL DEFAULT true,
    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT uq_food_attributes_key UNIQUE (attr_key)
);

CREATE INDEX IF NOT EXISTS idx_food_attributes_origin ON food_attributes (origin);

CREATE TABLE IF NOT EXISTS food_catalog (
    id                  UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    bls_code            VARCHAR(16),
    external_key        VARCHAR(80),
    name_de             VARCHAR(500) NOT NULL,
    name_en             VARCHAR(500),
    food_group          VARCHAR(8),
    catalog_kind        VARCHAR(20) NOT NULL DEFAULT 'official_bls'
                        CHECK (catalog_kind IN ('official_bls', 'manual_admin', 'manual_user')),
    owner_profile_id    UUID REFERENCES profiles(id) ON DELETE CASCADE,
    bls_version         VARCHAR(16),
    source              VARCHAR(40) NOT NULL DEFAULT 'bls_4.0',
    is_active           BOOLEAN NOT NULL DEFAULT true,
    created_at          TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at          TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT uq_food_catalog_bls_code UNIQUE (bls_code),
    CONSTRAINT chk_food_catalog_bls_code CHECK (
        (catalog_kind = 'official_bls' AND bls_code IS NOT NULL)
        OR (catalog_kind <> 'official_bls' AND bls_code IS NULL)
    )
);

CREATE INDEX IF NOT EXISTS idx_food_catalog_name_de ON food_catalog (lower(name_de));
CREATE INDEX IF NOT EXISTS idx_food_catalog_kind ON food_catalog (catalog_kind);
CREATE INDEX IF NOT EXISTS idx_food_catalog_owner ON food_catalog (owner_profile_id)
    WHERE owner_profile_id IS NOT NULL;

CREATE TABLE IF NOT EXISTS food_attribute_values (
    id              BIGSERIAL PRIMARY KEY,
    food_id         UUID NOT NULL REFERENCES food_catalog(id) ON DELETE CASCADE,
    attribute_id    INT NOT NULL REFERENCES food_attributes(id) ON DELETE CASCADE,
    value_num       DOUBLE PRECISION,
    value_bool      BOOLEAN,
    value_text      TEXT,
    is_trace        BOOLEAN NOT NULL DEFAULT false,
    origin_code     VARCHAR(80),
    reference_text  TEXT,
    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT uq_food_attribute_value UNIQUE (food_id, attribute_id),
    CONSTRAINT chk_food_attr_one_value CHECK (
        (
            (value_num IS NOT NULL)::int
            + (value_bool IS NOT NULL)::int
            + (value_text IS NOT NULL)::int
        ) <= 1
    )
);

CREATE INDEX IF NOT EXISTS idx_fav_food ON food_attribute_values (food_id);
CREATE INDEX IF NOT EXISTS idx_fav_attr ON food_attribute_values (attribute_id);

CREATE TABLE IF NOT EXISTS food_name_mappings (
    id                      SERIAL PRIMARY KEY,
    source_system           VARCHAR(20) NOT NULL DEFAULT 'fddb',
    source_name_raw         VARCHAR(500) NOT NULL,
    source_name_normalized  VARCHAR(500) NOT NULL,
    food_id                 UUID NOT NULL REFERENCES food_catalog(id) ON DELETE CASCADE,
    profile_id              UUID REFERENCES profiles(id) ON DELETE CASCADE,
    source                  VARCHAR(20) NOT NULL DEFAULT 'manual'
                            CHECK (source IN ('manual', 'bulk', 'admin')),
    created_at              TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at              TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE UNIQUE INDEX IF NOT EXISTS uq_food_map_global
    ON food_name_mappings (source_system, source_name_normalized)
    WHERE profile_id IS NULL;
CREATE UNIQUE INDEX IF NOT EXISTS uq_food_map_user
    ON food_name_mappings (source_system, source_name_normalized, profile_id)
    WHERE profile_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_food_map_food ON food_name_mappings (food_id);

CREATE TABLE IF NOT EXISTS nutrition_items (
    id                      UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    profile_id              UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,
    date                    DATE NOT NULL,
    logged_at               TIMESTAMPTZ,
    source_name_raw         VARCHAR(500) NOT NULL,
    source_name_normalized  VARCHAR(500) NOT NULL,
    source_system           VARCHAR(20) NOT NULL DEFAULT 'fddb',
    quantity_raw            VARCHAR(80),
    quantity_g              NUMERIC(10,3),
    fddb_kcal               NUMERIC(8,2),
    fddb_protein_g          NUMERIC(8,2),
    fddb_fat_g              NUMERIC(8,2),
    fddb_carbs_g            NUMERIC(8,2),
    food_id                 UUID REFERENCES food_catalog(id) ON DELETE SET NULL,
    mapping_id              INT REFERENCES food_name_mappings(id) ON DELETE SET NULL,
    value_origin            VARCHAR(20) NOT NULL DEFAULT 'fddb'
                            CHECK (value_origin IN ('fddb', 'bls', 'manual_catalog')),
    source                  VARCHAR(20) NOT NULL DEFAULT 'csv'
                            CHECK (source IN ('csv', 'manual')),
    created_at              TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at              TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_nutrition_items_profile_date
    ON nutrition_items (profile_id, date DESC);
CREATE INDEX IF NOT EXISTS idx_nutrition_items_unmapped
    ON nutrition_items (profile_id, source_name_normalized)
    WHERE food_id IS NULL;

CREATE TABLE IF NOT EXISTS nutrition_daily_nutrients (
    id                      BIGSERIAL PRIMARY KEY,
    profile_id              UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,
    date                    DATE NOT NULL,
    attribute_id            INT NOT NULL REFERENCES food_attributes(id) ON DELETE CASCADE,
    value                   DOUBLE PRECISION NOT NULL,
    contributing_item_count INT NOT NULL DEFAULT 0,
    created_at              TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at              TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT uq_nutrition_daily_nutrient UNIQUE (profile_id, date, attribute_id)
);

CREATE INDEX IF NOT EXISTS idx_ndn_profile_date
    ON nutrition_daily_nutrients (profile_id, date DESC);

CREATE TABLE IF NOT EXISTS nutrition_day_marks (
    id              SERIAL PRIMARY KEY,
    profile_id      UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,
    date            DATE NOT NULL,
    mark_type       VARCHAR(20) NOT NULL CHECK (mark_type IN ('fasting', 'incomplete')),
    note            TEXT,
    source          VARCHAR(20) NOT NULL DEFAULT 'manual',
    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT uq_nutrition_day_mark UNIQUE (profile_id, date)
);

ALTER TABLE nutrition_log ADD COLUMN IF NOT EXISTS macro_origin VARCHAR(20);
ALTER TABLE nutrition_log ADD COLUMN IF NOT EXISTS mapped_item_count INT;
ALTER TABLE nutrition_log ADD COLUMN IF NOT EXISTS unmapped_item_count INT;
ALTER TABLE nutrition_log ADD COLUMN IF NOT EXISTS has_items BOOLEAN DEFAULT false;
ALTER TABLE nutrition_log ADD COLUMN IF NOT EXISTS last_import_at TIMESTAMPTZ;
ALTER TABLE nutrition_log ADD COLUMN IF NOT EXISTS macros_confirmed_at TIMESTAMPTZ;

DELETE FROM nutrition_log a
USING nutrition_log b
WHERE a.profile_id = b.profile_id
  AND a.date = b.date
  AND (a.created < b.created OR (a.created = b.created AND a.id::text < b.id::text));

CREATE UNIQUE INDEX IF NOT EXISTS uq_nutrition_log_profile_date
    ON nutrition_log (profile_id, date);

ALTER TABLE profiles
    ADD COLUMN IF NOT EXISTS nutrition_import_conflict_policy VARCHAR(30) DEFAULT 'prompt';

DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM pg_constraint WHERE conname = 'chk_nutrition_import_policy'
    ) THEN
        ALTER TABLE profiles ADD CONSTRAINT chk_nutrition_import_policy
            CHECK (nutrition_import_conflict_policy IN (
                'prompt', 'overwrite_catalog', 'overwrite_fddb', 'keep_existing'
            ));
    END IF;
END $$;

UPDATE csv_field_mappings
SET field_mappings = COALESCE(field_mappings, '{}'::jsonb)
    || '{"bezeichnung": "food_name", "menge": "quantity_raw"}'::jsonb,
    updated_at = NOW()
WHERE is_system = true
  AND module = 'nutrition'
  AND (
      mapping_name ILIKE '%FDDB%'
      OR mapping_name ILIKE '%fddb%'
  );

COMMENT ON TABLE food_catalog IS 'BLS 4.0 official foods + manual catalog extensions';
COMMENT ON COLUMN food_catalog.bls_code IS 'Stable official BLS identity; upsert key';
COMMENT ON TABLE food_name_mappings IS 'Learned FDDB name -> food_catalog; user overrides global';
COMMENT ON TABLE nutrition_day_marks IS 'Explicit fasting/incomplete; import must not delete';

DO $$
BEGIN
    RAISE NOTICE 'Migration 062: BLS food catalog, mappings, nutrition items, day marks';
END $$;