// Package miot provides MIoT core client for Xiaomi Home devices.
// This file is a direct port of py-miot/const.py constants system.
package miot

import (
	"fmt"
	"strings"
)

// ============================================================================
// String constants (aligned with Python miot/const.py)
// ============================================================================

const (
	DOMAIN                      = "xiaomi_home"
	DEFAULT_NAME                = "Xiaomi Home"
	DEFAULT_NICK_NAME           = "Xiaomi"
	OAUTH2_CLIENT_ID            = "2882303761520251711"
	OAUTH2_AUTH_URL             = "https://account.xiaomi.com/oauth2/authorize"
	DEFAULT_OAUTH2_API_HOST     = "ha.api.io.mi.com"
	DEFAULT_CLOUD_BROKER_HOST   = "ha.mqtt.io.mi.com"
	DEFAULT_CLOUD_SERVER        = "cn"
	DEFAULT_CTRL_MODE           = "auto"
	DEFAULT_INTEGRATION_LANGUAGE = "en"
	OAUTH_REDIRECT_URL          = "http://homeassistant.local:8123"
)

// ============================================================================
// Numeric constants (aligned with Python miot/const.py)
// ============================================================================

const (
	MIHOME_HTTP_API_TIMEOUT     = 30
	MIHOME_MQTT_KEEPALIVE       = 60
	// seconds, 3 days
	MIHOME_CERT_EXPIRE_MARGIN   = 3600 * 24 * 3
	// seconds, 1 hour — token 过期前刷新（比 Python 60s 更保守）
	MIHOME_REFRESH_THRESHOLD = 3600 * 6
	NETWORK_REFRESH_INTERVAL    = 30
	// seconds, 14 days
	SPEC_STD_LIB_EFFECTIVE_TIME = 3600 * 24 * 14
	// seconds, 14 days
	MANUFACTURER_EFFECTIVE_TIME = 3600 * 24 * 14
)

// ============================================================================
// Variables — slices, maps, and configurable values (aligned with Python miot/const.py)
// ============================================================================

var (
	// SUPPORTED_PLATFORMS lists Home Assistant platforms supported by MIoT integration.
	SUPPORTED_PLATFORMS = []string{
		"binary_sensor",
		"button",
		"climate",
		"cover",
		"device_tracker",
		"event",
		"fan",
		"humidifier",
		"light",
		"media_player",
		"notify",
		"number",
		"select",
		"sensor",
		"switch",
		"text",
		"vacuum",
		"water_heater",
	}

	// UNSUPPORTED_MODELS lists device models explicitly not supported.
	UNSUPPORTED_MODELS = []string{
		"chuangmi.ir.v2",
		"era.airp.cwb03",
		"hmpace.motion.v6nfc",
		"k0918.toothbrush.t700",
	}

	// CLOUD_SERVERS maps cloud server region codes to human-readable names.
	CLOUD_SERVERS = map[string]string{
		"cn": "中国大陆",
		"de": "Europe",
		"i2": "India",
		"ru": "Russia",
		"sg": "Singapore",
		"us": "United States",
	}

	// SUPPORT_CENTRAL_GATEWAY_CTRL lists regions that support central gateway control.
	SUPPORT_CENTRAL_GATEWAY_CTRL = []string{"cn"}

	// INTEGRATION_LANGUAGES maps language codes to human-readable names.
	INTEGRATION_LANGUAGES = map[string]string{
		"de":      "Deutsch",
		"en":      "English",
		"es":      "Español",
		"fr":      "Français",
		"it":      "Italiano",
		"ja":      "日本語",
		"nl":      "Nederlands",
		"pt":      "Português",
		"pt-BR":   "Português (Brasil)",
		"ru":      "Русский",
		"tr":      "Türkçe",
		"zh-Hans": "简体中文",
		"zh-Hant": "繁體中文",
	}
)

// Cover dead zone width — configurable at runtime.
var (
	DEFAULT_COVER_DEAD_ZONE_WIDTH = 0
	MIN_COVER_DEAD_ZONE_WIDTH     = 0
	MAX_COVER_DEAD_ZONE_WIDTH     = 5
)

// ============================================================================
// CA Certificate constants (aligned with Python miot/const.py)
// ============================================================================

// MIHOME_CA_CERT_STR is the MIoT CA certificate in PEM format.
// Contains: Mijia Root CA + MIOT Central Gateway CA.
const MIHOME_CA_CERT_STR = `-----BEGIN CERTIFICATE-----
MIIBazCCAQ+gAwIBAgIEA/UKYDAMBggqhkjOPQQDAgUAMCIxEzARBgNVBAoTCk1p
amlhIFJvb3QxCzAJBgNVBAYTAkNOMCAXDTE2MTEyMzAxMzk0NVoYDzIwNjYxMTEx
MDEzOTQ1WjAiMRMwEQYDVQQKEwpNaWppYSBSb290MQswCQYDVQQGEwJDTjBZMBMG
ByqGSM49AgEGCCqGSM49AwEHA0IABL71iwLa4//4VBqgRI+6xE23xpovqPCxtv96
2VHbZij61/Ag6jmi7oZ/3Xg/3C+whglcwoUEE6KALGJ9vccV9PmjLzAtMAwGA1Ud
EwQFMAMBAf8wHQYDVR0OBBYEFJa3onw5sblmM6n40QmyAGDI5sURMAwGCCqGSM49
BAMCBQADSAAwRQIgchciK9h6tZmfrP8Ka6KziQ4Lv3hKfrHtAZXMHPda4IYCIQCG
az93ggFcbrG9u2wixjx1HKW4DUA5NXZG0wWQTpJTbQ==
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`

// MIHOME_CA_CERT_SHA256 is the SHA256 hash of the MIoT CA certificate.
const MIHOME_CA_CERT_SHA256 = "8b7bf306be3632e08b0ead308249e5f2b2520dc921ad143872d5fcc7c68d6759"

// ============================================================================
// CtrlMode — control mode enum (migrated from deleted constants.go)
// ============================================================================

// CtrlMode represents the control mode for devices.
type CtrlMode int

const (
	// CtrlModeCloud represents cloud control mode.
	CtrlModeCloud CtrlMode = iota
	// CtrlModeGateway represents gateway control mode.
	CtrlModeGateway
	// CtrlModeLAN represents LAN control mode.
	CtrlModeLAN
	// CtrlModeAuto represents auto control mode.
	CtrlModeAuto
)

// String returns the string representation of CtrlMode.
func (m CtrlMode) String() string {
	switch m {
	case CtrlModeAuto:
		return "auto"
	case CtrlModeCloud:
		return "cloud"
	case CtrlModeGateway:
		return "gateway"
	case CtrlModeLAN:
		return "lan"
	default:
		return "unknown"
	}
}

// ParseCtrlMode parses a string into a CtrlMode value.
// "cloud" → CtrlModeCloud, "gateway" → CtrlModeGateway, "lan" → CtrlModeLAN.
// Returns an error for unknown strings.
// Aligns with Python: CtrlMode.load(mode).
func ParseCtrlMode(s string) (CtrlMode, error) {
	switch strings.ToLower(s) {
	case "auto":
		return CtrlModeAuto, nil
	case "cloud":
		return CtrlModeCloud, nil
	case "gateway":
		return CtrlModeGateway, nil
	case "lan":
		return CtrlModeLAN, nil
	default:
		return 0, fmt.Errorf("unknown ctrl mode: %s", s)
	}
}

// ============================================================================
// Refresh / retry timings (migrated from deleted constants.go)
// ============================================================================

// RefreshPropsDelay is the delay before executing property refresh (200ms, aligns with Python).
const RefreshPropsDelay = 200

// RefreshPropsRetryMax is the maximum number of retries for property refresh (3, aligns with Python).
const RefreshPropsRetryMax = 3

// RefreshPropsRetryDelay is the delay between property refresh retries (3s, aligns with Python).
const RefreshPropsRetryDelay = 3 * 1000 // 3 seconds in milliseconds

// RefreshCloudDevicesDelay is the delay before refreshing cloud devices (6s, aligns with Python).
const RefreshCloudDevicesDelay = 6 * 1000 // 6 seconds in milliseconds

// RefreshCloudDevicesRetryDelay is the delay before retrying cloud device refresh (60s, aligns with Python).
const RefreshCloudDevicesRetryDelay = 60 * 1000 // 60 seconds in milliseconds

// TokenRefreshInterval is the interval for refreshing OAuth token (aligns with Python).
const TokenRefreshInterval = 3600 * 1000 // 1 hour in milliseconds

// CertRefreshInterval is the interval for refreshing certificate (aligns with Python).
const CertRefreshInterval = 24 * 3600 * 1000 // 24 hours in milliseconds

// RefreshAuthRetryDelay is the delay before retrying token refresh (3600s, aligns with Python).
const RefreshAuthRetryDelay = 3600

// RefreshCertRetryDelay is the delay before retrying cert refresh (300s, aligns with Python).
const RefreshCertRetryDelay = 300

// ============================================================================
// MQTT topics (migrated from deleted constants.go)
// ============================================================================

// TopicProp is the MQTT topic for property changes.
const TopicProp = "properties_changed"

// TopicEvent is the MQTT topic for event occurrences.
const TopicEvent = "event_occured"

// TopicState is the MQTT topic for device state changes.
const TopicState = "state"

// ============================================================================
// API paths / defaults (migrated from deleted constants.go)
// ============================================================================

// APIPathGetDevices is the API path for getting devices.
const APIPathGetDevices = "/v2/home/device/list"

// APIPathGetProps is the API path for getting properties.
const APIPathGetProps = "/v2/home/device/prop/get"

// APIPathSetProps is the API path for setting properties.
const APIPathSetProps = "/v2/home/device/prop/set"

// APIPathDoAction is the API path for executing actions.
const APIPathDoAction = "/v2/home/device/action"

// DefaultCloudServer is the default cloud server.
const DefaultCloudServer = "cn"

// DefaultOAUTH2APIHost is the default OAuth2 API host (aligned with Python).
const DefaultOAUTH2APIHost = "ha.api.io.mi.com"

// MHomeHTTPAPITimeout is the HTTP API timeout in seconds (aligned with Python).
const MHomeHTTPAPITimeout = 30

// DefaultMQTTBroker is the default MQTT broker address.
const DefaultMQTTBroker = "ssl://cn-ha.mqtt.io.mi.com:8883"

// DefaultMQTTKeepAlive is the default MQTT keep-alive interval in seconds.
const DefaultMQTTKeepAlive = 60

// DefaultMQTTQoS is the default MQTT QoS level.
const DefaultMQTTQoS = 1