CREATE TABLE IF NOT EXISTS vehicle_hydrogen_energy_parameter (
    vin VARCHAR(64) NOT NULL,
    battery_capacity_kwh DECIMAL(12,3) NOT NULL,
    hydrogen_energy_kwh_per_kg DECIMAL(12,3) NOT NULL DEFAULT 16.000,
    confirmed_by VARCHAR(96) NOT NULL DEFAULT '',
    source_note VARCHAR(255) NOT NULL DEFAULT '',
    effective_from DATE NOT NULL,
    effective_to DATE NULL,
    active TINYINT(1) NOT NULL DEFAULT 1,
    created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
    PRIMARY KEY (vin, effective_from),
    INDEX idx_hydrogen_energy_parameter_active (active, effective_from, effective_to, vin),
    CONSTRAINT chk_hydrogen_energy_parameter_capacity CHECK (battery_capacity_kwh > 0 AND battery_capacity_kwh <= 500),
    CONSTRAINT chk_hydrogen_energy_parameter_conversion CHECK (hydrogen_energy_kwh_per_kg > 0 AND hydrogen_energy_kwh_per_kg <= 50),
    CONSTRAINT chk_hydrogen_energy_parameter_dates CHECK (effective_to IS NULL OR effective_to >= effective_from)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

ALTER TABLE vehicle_open_daily_energy
    ADD COLUMN raw_consumption_kg DECIMAL(18,3) NULL AFTER consumption_kg,
    ADD COLUMN battery_soc_delta_pct DECIMAL(10,3) NULL AFTER raw_consumption_kg,
    ADD COLUMN battery_discharge_kwh DECIMAL(18,3) NULL AFTER battery_soc_delta_pct,
    ADD COLUMN battery_equivalent_kg DECIMAL(18,3) NULL AFTER battery_discharge_kwh,
    ADD COLUMN soc_balanced_consumption_kg DECIMAL(18,3) NULL AFTER battery_equivalent_kg,
    ADD COLUMN mixed_mileage_km DECIMAL(18,3) NOT NULL DEFAULT 0 AFTER soc_balanced_consumption_kg,
    ADD COLUMN pure_electric_mileage_km DECIMAL(18,3) NOT NULL DEFAULT 0 AFTER mixed_mileage_km,
    ADD COLUMN consumption_kg_per_100km DECIMAL(18,3) NULL AFTER pure_electric_mileage_km,
    ADD COLUMN soc_balanced_kg_per_100km DECIMAL(18,3) NULL AFTER consumption_kg_per_100km,
    ADD COLUMN charge_count INT UNSIGNED NOT NULL DEFAULT 0 AFTER refuel_count,
    ADD COLUMN valid_segment_count INT UNSIGNED NOT NULL DEFAULT 0 AFTER charge_count,
    ADD COLUMN invalid_segment_count INT UNSIGNED NOT NULL DEFAULT 0 AFTER valid_segment_count,
    ADD COLUMN algorithm_version VARCHAR(64) NOT NULL DEFAULT 'PRESSURE_NIST_SEGMENT_MEDIAN_5' AFTER invalid_segment_count,
    ADD COLUMN parameter_json JSON NULL AFTER algorithm_version,
    ADD COLUMN evidence_json JSON NULL AFTER parameter_json;