package openplatform

import (
	"testing"
	"time"
)

func TestBuildHydrogenDailyStatsSumsDropsAndIgnoresRefuelAndNoise(t *testing.T) {
	base := time.Date(2026, 7, 1, 0, 0, 0, 0, time.UTC)
	stats := BuildHydrogenDailyStats([]HydrogenObservation{
		{VIN: "LTEST32960VIN0001", ObservedAt: base.Add(3 * time.Hour), MassKg: 10.00},
		{VIN: "LTEST32960VIN0001", ObservedAt: base, MassKg: 10.50},
		{VIN: "LTEST32960VIN0001", ObservedAt: base.Add(time.Hour), MassKg: 10.30},
		{VIN: "LTEST32960VIN0001", ObservedAt: base.Add(2 * time.Hour), MassKg: 11.90},
		{VIN: "LTEST32960VIN0001", ObservedAt: base.Add(4 * time.Hour), MassKg: 9.98},
	}, "2026-07-01", 0.05, 5)
	if len(stats) != 1 {
		t.Fatalf("stats = %#v", stats)
	}
	stat := stats[0]
	if stat.ConsumptionKg != 2.1 || stat.RefuelCount != 1 || stat.SampleCount != 5 || stat.QualityStatus != "OK" {
		t.Fatalf("stat = %#v", stat)
	}
}

func TestBuildHydrogenDailyStatsMarksLargeDropSuspect(t *testing.T) {
	base := time.Now()
	stats := BuildHydrogenDailyStats([]HydrogenObservation{
		{VIN: "LTEST32960VIN0001", ObservedAt: base, MassKg: 20},
		{VIN: "LTEST32960VIN0001", ObservedAt: base.Add(time.Minute), MassKg: 1},
	}, "2026-07-01", 0.05, 5)
	if len(stats) != 1 || stats[0].QualityStatus != "SUSPECT" || stats[0].ConsumptionKg != 0 {
		t.Fatalf("stats = %#v", stats)
	}
}

func TestBuildHydrogenDailyStatsDoesNotMixSources(t *testing.T) {
	base := time.Now()
	stats := BuildHydrogenDailyStats([]HydrogenObservation{
		{VIN: "LTEST32960VIN0001", Source: "source-a", ObservedAt: base, MassKg: 10},
		{VIN: "LTEST32960VIN0001", Source: "source-a", ObservedAt: base.Add(2 * time.Minute), MassKg: 9.8},
		{VIN: "LTEST32960VIN0001", Source: "source-a", ObservedAt: base.Add(4 * time.Minute), MassKg: 9.6},
		{VIN: "LTEST32960VIN0001", Source: "source-b", ObservedAt: base.Add(time.Minute), MassKg: 20},
		{VIN: "LTEST32960VIN0001", Source: "source-b", ObservedAt: base.Add(3 * time.Minute), MassKg: 19.9},
	}, "2026-07-01", 0.05, 5)
	if len(stats) != 1 {
		t.Fatalf("stats = %#v", stats)
	}
	if stats[0].Source != "source-a" || stats[0].ConsumptionKg != 0.4 || stats[0].SampleCount != 3 {
		t.Fatalf("stat = %#v", stats[0])
	}
}

func TestExtractHydrogenMassSupportsCanonicalStringAndNumber(t *testing.T) {
	for _, encoded := range []string{
		`{"gb32960.gd_fc_vehicle_info.hydrogen_mass_kg":"12.3"}`,
		`{"gb32960.gd_fc_vehicle_info.hydrogen_mass_kg":12.3}`,
	} {
		value, ok := ExtractHydrogenMass(encoded)
		if !ok || value != 12.3 {
			t.Fatalf("value=%v ok=%v for %s", value, ok, encoded)
		}
	}
}

func TestPressureHydrogenMassMatchesGuangdongVehicle(t *testing.T) {
	mass, ok := PressureHydrogenMassKg(16.4, 34, 380)
	if !ok || mass < 4.47 || mass > 4.49 {
		t.Fatalf("mass=%.3f ok=%v", mass, ok)
	}
	pressure, temperature, ok := ExtractHydrogenPressureTemperature(`{
  "gb32960.fuel_cell.max_hydrogen_pressure_mpa":"16.4",
  "gb32960.fuel_cell.max_hydrogen_temperature_c":34,
  "gb32960.gd_fc_vehicle_info.hydrogen_mass_kg":99.9
}`)
	if !ok || pressure != 16.4 || temperature != 34 {
		t.Fatalf("pressure=%v temperature=%v ok=%v", pressure, temperature, ok)
	}
}