CREATE TABLE material_types (
    id BIGINT NOT NULL AUTO_INCREMENT,
    organization_id BIGINT NOT NULL,
    code VARCHAR(50) NOT NULL,
    name VARCHAR(100) NOT NULL,
    status VARCHAR(20) NOT NULL DEFAULT 'active',
    PRIMARY KEY (id),
    UNIQUE KEY uk_material_types_org_code (organization_id, code),
    CONSTRAINT fk_material_types_org FOREIGN KEY (organization_id) REFERENCES organizations(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE material_categories (
    id BIGINT NOT NULL AUTO_INCREMENT,
    organization_id BIGINT NOT NULL,
    code VARCHAR(50) NOT NULL,
    name VARCHAR(100) NOT NULL,
    parent_id BIGINT NULL,
    status VARCHAR(20) NOT NULL DEFAULT 'active',
    PRIMARY KEY (id),
    UNIQUE KEY uk_material_categories_org_code (organization_id, code),
    CONSTRAINT fk_material_categories_org FOREIGN KEY (organization_id) REFERENCES organizations(id) ON DELETE RESTRICT,
    CONSTRAINT fk_material_categories_parent FOREIGN KEY (parent_id) REFERENCES material_categories(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE units (
    id BIGINT NOT NULL AUTO_INCREMENT,
    organization_id BIGINT NOT NULL,
    code VARCHAR(50) NOT NULL,
    name VARCHAR(100) NOT NULL,
    precision_scale TINYINT NOT NULL DEFAULT 0,
    status VARCHAR(20) NOT NULL DEFAULT 'active',
    PRIMARY KEY (id),
    UNIQUE KEY uk_units_org_code (organization_id, code),
    CONSTRAINT fk_units_org FOREIGN KEY (organization_id) REFERENCES organizations(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE code_rules (
    id BIGINT NOT NULL AUTO_INCREMENT,
    organization_id BIGINT NOT NULL,
    category_id BIGINT NOT NULL,
    prefix VARCHAR(30) NOT NULL,
    sequence_length TINYINT NOT NULL,
    next_sequence BIGINT NOT NULL DEFAULT 1,
    status VARCHAR(20) NOT NULL DEFAULT 'active',
    PRIMARY KEY (id),
    UNIQUE KEY uk_code_rules_org_category (organization_id, category_id),
    CONSTRAINT fk_code_rules_org FOREIGN KEY (organization_id) REFERENCES organizations(id) ON DELETE RESTRICT,
    CONSTRAINT fk_code_rules_category FOREIGN KEY (category_id) REFERENCES material_categories(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE material_unit_conversions (
    id BIGINT NOT NULL AUTO_INCREMENT,
    organization_id BIGINT NOT NULL,
    material_id BIGINT NOT NULL,
    from_unit_id BIGINT NOT NULL,
    to_unit_id BIGINT NOT NULL,
    conversion_rate DECIMAL(20,6) NOT NULL,
    effective_from DATE NOT NULL,
    effective_to DATE NULL,
    PRIMARY KEY (id),
    KEY idx_material_unit_conversions_material (organization_id, material_id),
    CONSTRAINT fk_material_unit_conversions_org FOREIGN KEY (organization_id) REFERENCES organizations(id) ON DELETE RESTRICT,
    CONSTRAINT fk_material_unit_conversions_material FOREIGN KEY (material_id) REFERENCES materials(id) ON DELETE RESTRICT,
    CONSTRAINT fk_material_unit_conversions_from_unit FOREIGN KEY (from_unit_id) REFERENCES units(id) ON DELETE RESTRICT,
    CONSTRAINT fk_material_unit_conversions_to_unit FOREIGN KEY (to_unit_id) REFERENCES units(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

ALTER TABLE materials
    ADD COLUMN organization_id BIGINT NOT NULL DEFAULT 1 AFTER id,
    ADD COLUMN material_type_id BIGINT NULL AFTER category,
    ADD COLUMN category_id BIGINT NULL AFTER material_type_id,
    ADD COLUMN base_unit_id BIGINT NULL AFTER unit,
    ADD COLUMN status VARCHAR(20) NOT NULL DEFAULT 'active' AFTER base_unit_id,
    ADD COLUMN version INT NOT NULL DEFAULT 1 AFTER status,
    ADD COLUMN manufacturer_model VARCHAR(200) NULL AFTER spec,
    ADD CONSTRAINT fk_materials_org FOREIGN KEY (organization_id) REFERENCES organizations(id) ON DELETE RESTRICT,
    ADD CONSTRAINT fk_materials_type FOREIGN KEY (material_type_id) REFERENCES material_types(id) ON DELETE RESTRICT,
    ADD CONSTRAINT fk_materials_category FOREIGN KEY (category_id) REFERENCES material_categories(id) ON DELETE RESTRICT,
    ADD CONSTRAINT fk_materials_base_unit FOREIGN KEY (base_unit_id) REFERENCES units(id) ON DELETE RESTRICT;

ALTER TABLE materials DROP INDEX material_code;
ALTER TABLE materials ADD UNIQUE KEY uk_materials_org_code (organization_id, material_code);

INSERT INTO material_types (organization_id, code, name) VALUES
(1, 'raw_material', '原材料'),
(1, 'semi_finished', '半成品'),
(1, 'finished_good', '成品'),
(1, 'consumable', '耗材'),
(1, 'service', '服务');

INSERT INTO material_categories (organization_id, code, name)
SELECT 1, category_code, category_name FROM materials_category;

INSERT INTO units (organization_id, code, name)
SELECT 1, unit, unit FROM materials WHERE unit IS NOT NULL AND unit <> '' GROUP BY unit;

UPDATE materials m
LEFT JOIN material_categories c ON c.organization_id = m.organization_id AND c.code = m.category
LEFT JOIN units u ON u.organization_id = m.organization_id AND u.code = m.unit
SET m.category_id = c.id, m.base_unit_id = u.id;