package v1

import (
	"encoding/json"
	"os"
	"strings"

	"github.com/gochat/gochat/internal/model"
	"gorm.io/gorm"
)

func inboxListResponse(inboxes []model.Inbox, db *gorm.DB, isAdmin bool) map[string]any {
	payload := make([]any, 0, len(inboxes))
	for i := range inboxes {
		payload = append(payload, serializeInbox(&inboxes[i], db, isAdmin))
	}
	return map[string]any{"payload": payload}
}

func serializeInbox(inbox *model.Inbox, db *gorm.DB, isAdmin bool) map[string]any {
	config := parseInboxChannelConfig(inbox.ChannelConfig)
	payload := map[string]any{
		"id":                            inbox.ID,
		"avatar_url":                    inbox.AvatarURL,
		"channel_id":                    inbox.ChannelID,
		"name":                          inbox.Name,
		"channel_type":                  chatwootChannelType(inbox.ChannelType),
		"greeting_enabled":              inbox.GreetingEnabled,
		"greeting_message":              inbox.GreetingMessage,
		"working_hours_enabled":         inbox.WorkingHoursEnabled,
		"enable_email_collect":          inbox.EnableEmailCollect,
		"csat_survey_enabled":           inbox.CsatSurveyEnabled,
		"csat_config":                   jsonStringObject(inbox.CsatConfig),
		"enable_auto_assignment":        inbox.EnableAutoAssignment,
		"auto_assignment_config":        configValue(config, "auto_assignment_config"),
		"out_of_office_message":         inbox.OutOfOfficeMessage,
		"working_hours":                 serializeInboxWorkingHours(inbox, config),
		"timezone":                      inbox.Timezone,
		"callback_webhook_url":          callbackWebhookURL(inbox, config),
		"allow_messages_after_resolved": inbox.AllowMessagesAfterResolved,
		"lock_to_single_conversation":   inbox.LockToSingleConversation,
		"sender_name_type":              chatwootSenderNameType(inbox.SenderNameType),
		"business_name":                 inbox.BusinessName,
		"allowed_domains":               configValue(config, "allowed_domains"),
		"widget_color":                  configValue(config, "widget_color"),
		"website_url":                   configValue(config, "website_url"),
		"hmac_mandatory":                configValue(config, "hmac_mandatory"),
		"welcome_title":                 configValue(config, "welcome_title"),
		"welcome_tagline":               configValue(config, "welcome_tagline"),
		"web_widget_script":             configValue(config, "web_widget_script"),
		"website_token":                 configValue(config, "website_token"),
		"selected_feature_flags":        configValue(config, "selected_feature_flags"),
		"reply_time":                    configValue(config, "reply_time"),
		"provider":                      configValue(config, "provider"),
	}

	switch chatwootChannelType(inbox.ChannelType) {
	case "Channel::WebWidget":
		if isAdmin {
			payload["hmac_token"] = configValue(config, "hmac_token")
		}
		payload["pre_chat_form_enabled"] = configValue(config, "pre_chat_form_enabled")
		payload["pre_chat_form_options"] = configValue(config, "pre_chat_form_options")
		payload["continuity_via_email"] = configValue(config, "continuity_via_email")
	case "Channel::Api":
		if isAdmin {
			payload["hmac_token"] = configValue(config, "hmac_token")
			payload["secret"] = inbox.Secret
		}
		payload["webhook_url"] = inbox.WebhookURL
		payload["inbox_identifier"] = firstConfigValue(config, "inbox_identifier", "identifier")
		payload["additional_attributes"] = configValue(config, "additional_attributes")
	case "Channel::Telegram":
		payload["bot_name"] = configValue(config, "bot_name")
	case "Channel::FacebookPage":
		payload["page_id"] = configValue(config, "page_id")
		payload["reauthorization_required"] = configValue(config, "reauthorization_required")
	case "Channel::Instagram":
		payload["instagram_id"] = configValue(config, "instagram_id")
		payload["reauthorization_required"] = configValue(config, "reauthorization_required")
	case "Channel::TwitterProfile":
		payload["tweets_enabled"] = configBoolDefault(config, "tweets_enabled", true)
	case "Channel::Tiktok":
		payload["reauthorization_required"] = configValue(config, "reauthorization_required")
	case "Channel::TwilioSms":
		payload["messaging_service_sid"] = configValue(config, "messaging_service_sid")
		payload["phone_number"] = configValue(config, "phone_number")
		payload["medium"] = configValue(config, "medium")
		payload["content_templates"] = configValue(config, "content_templates")
		if isAdmin {
			payload["auth_token"] = configValue(config, "auth_token")
			payload["account_sid"] = configValue(config, "account_sid")
			payload["api_key_sid"] = configValue(config, "api_key_sid")
		}
		payload["voice_enabled"] = configValue(config, "voice_enabled")
		voiceConfigured := configStringPresent(config, "twiml_app_sid")
		payload["voice_configured"] = voiceConfigured
		payload["has_api_key_secret"] = configStringPresent(config, "api_key_secret")
		if voiceConfigured {
			payload["voice_call_webhook_url"] = configValue(config, "voice_call_webhook_url")
			payload["voice_status_webhook_url"] = configValue(config, "voice_status_webhook_url")
		}
	case "Channel::Email":
		payload["email"] = configValue(config, "email")
		forwardingEnabled := strings.TrimSpace(os.Getenv("MAILER_INBOUND_EMAIL_DOMAIN")) != ""
		payload["forwarding_enabled"] = forwardingEnabled
		if forwardingEnabled {
			payload["forward_to_email"] = configValue(config, "forward_to_email")
		}
		if isAdmin {
			payload["imap_login"] = configValue(config, "imap_login")
			payload["imap_password"] = configValue(config, "imap_password")
			payload["imap_address"] = configValue(config, "imap_address")
			payload["imap_port"] = configValue(config, "imap_port")
			payload["imap_enabled"] = configValue(config, "imap_enabled")
			payload["imap_enable_ssl"] = configValue(config, "imap_enable_ssl")
			payload["imap_authentication"] = configValue(config, "imap_authentication")
			payload["smtp_login"] = configValue(config, "smtp_login")
			payload["smtp_password"] = configValue(config, "smtp_password")
			payload["smtp_address"] = configValue(config, "smtp_address")
			payload["smtp_port"] = configValue(config, "smtp_port")
			payload["smtp_enabled"] = configValue(config, "smtp_enabled")
			payload["smtp_domain"] = configValue(config, "smtp_domain")
			payload["smtp_enable_ssl_tls"] = configValue(config, "smtp_enable_ssl_tls")
			payload["smtp_enable_starttls_auto"] = configValue(config, "smtp_enable_starttls_auto")
			payload["smtp_openssl_verify_mode"] = configValue(config, "smtp_openssl_verify_mode")
			payload["smtp_authentication"] = configValue(config, "smtp_authentication")
			if emailOauthProvider(config) {
				payload["reauthorization_required"] = configObjectEmpty(config, "provider_config") || configBoolDefault(config, "reauthorization_required", false)
			}
		}
	case "Channel::Whatsapp":
		payload["phone_number"] = configValue(config, "phone_number")
		payload["message_templates"] = configValue(config, "message_templates")
		if isAdmin {
			payload["provider_config"] = configValue(config, "provider_config")
		}
		payload["reauthorization_required"] = configValue(config, "reauthorization_required")
		payload["voice_enabled"] = configValue(config, "voice_enabled")
	case "Channel::Line":
		payload["line_channel_id"] = configValue(config, "line_channel_id")
		payload["line_channel_secret"] = configValue(config, "line_channel_secret")
		payload["line_channel_token"] = configValue(config, "line_channel_token")
	case "Channel::Sms":
		payload["phone_number"] = configValue(config, "phone_number")
		payload["provider_config"] = configValue(config, "provider_config")
	}

	if db != nil && inbox.PortalID != nil && *inbox.PortalID != 0 {
		var portal model.Portal
		if err := db.Where("id = ?", *inbox.PortalID).First(&portal).Error; err == nil {
			payload["help_center"] = map[string]any{
				"name": portal.Name,
				"slug": portal.Slug,
			}
		}
	}

	return payload
}

func serializeInboxWorkingHours(inbox *model.Inbox, config map[string]any) any {
	if len(inbox.WorkingHours) == 0 {
		return configArray(config, "working_hours")
	}
	payload := make([]any, 0, len(inbox.WorkingHours))
	for _, wh := range inbox.WorkingHours {
		payload = append(payload, map[string]any{
			"day_of_week":    wh.DayOfWeek,
			"closed_all_day": wh.ClosedAllDay,
			"open_hour":      wh.OpenHour,
			"open_minutes":   wh.OpenMinutes,
			"close_hour":     wh.CloseHour,
			"close_minutes":  wh.CloseMinutes,
			"open_all_day":   wh.OpenAllDay,
		})
	}
	return payload
}

func chatwootChannelType(channelType string) string {
	if strings.HasPrefix(channelType, "Channel::") {
		return channelType
	}
	aliases := map[string]string{
		"web_widget": "Channel::WebWidget",
		"facebook":   "Channel::FacebookPage",
		"instagram":  "Channel::Instagram",
		"twitter":    "Channel::TwitterProfile",
		"twilio_sms": "Channel::TwilioSms",
		"whatsapp":   "Channel::Whatsapp",
		"api":        "Channel::Api",
		"email":      "Channel::Email",
		"telegram":   "Channel::Telegram",
		"line":       "Channel::Line",
		"sms":        "Channel::Sms",
		"tiktok":     "Channel::Tiktok",
	}
	if mapped, ok := aliases[channelType]; ok {
		return mapped
	}
	return channelType
}

func chatwootSenderNameType(value string) string {
	switch strings.ToLower(strings.TrimSpace(value)) {
	case "", "friendly", "friendly_name":
		return "friendly"
	case "professional", "business_name":
		return "professional"
	default:
		return value
	}
}

func callbackWebhookURL(inbox *model.Inbox, config map[string]any) any {
	baseURL := strings.TrimRight(os.Getenv("FRONTEND_URL"), "/")
	switch chatwootChannelType(inbox.ChannelType) {
	case "Channel::TwilioSms":
		return baseURL + "/twilio/callback"
	case "Channel::Sms":
		phoneNumber := strings.TrimPrefix(inboxConfigString(config, "phone_number"), "+")
		return baseURL + "/webhooks/sms/" + phoneNumber
	case "Channel::Line":
		return baseURL + "/webhooks/line/" + inboxConfigString(config, "line_channel_id")
	case "Channel::Whatsapp":
		return baseURL + "/webhooks/whatsapp/" + inboxConfigString(config, "phone_number")
	default:
		return nil
	}
}

func parseInboxChannelConfig(raw string) map[string]any {
	if raw == "" {
		return map[string]any{}
	}
	var config map[string]any
	if err := json.Unmarshal([]byte(raw), &config); err != nil {
		return map[string]any{}
	}
	return config
}

func configValue(config map[string]any, key string) any {
	if value, ok := config[key]; ok {
		return value
	}
	return nil
}

func inboxConfigString(config map[string]any, key string) string {
	value, ok := config[key]
	if !ok || value == nil {
		return ""
	}
	if s, ok := value.(string); ok {
		return s
	}
	return ""
}

func firstConfigValue(config map[string]any, keys ...string) any {
	for _, key := range keys {
		if value, ok := config[key]; ok {
			return value
		}
	}
	return nil
}

func configBoolDefault(config map[string]any, key string, fallback bool) bool {
	value, ok := config[key]
	if !ok || value == nil {
		return fallback
	}
	if parsed, ok := value.(bool); ok {
		return parsed
	}
	return fallback
}

func configStringPresent(config map[string]any, key string) bool {
	value, ok := config[key]
	if !ok || value == nil {
		return false
	}
	if s, ok := value.(string); ok {
		return strings.TrimSpace(s) != ""
	}
	return true
}

func configObjectEmpty(config map[string]any, key string) bool {
	value, ok := config[key]
	if !ok || value == nil {
		return true
	}
	if object, ok := value.(map[string]any); ok {
		return len(object) == 0
	}
	return false
}

func emailOauthProvider(config map[string]any) bool {
	provider, _ := config["provider"].(string)
	switch strings.ToLower(strings.TrimSpace(provider)) {
	case "microsoft", "google", "legacy_google":
		return true
	default:
		return false
	}
}

func configArray(config map[string]any, key string) any {
	if value, ok := config[key]; ok {
		return value
	}
	return []any{}
}

func jsonStringObject(raw string) any {
	if raw == "" {
		return map[string]any{}
	}
	var value any
	if err := json.Unmarshal([]byte(raw), &value); err != nil {
		return map[string]any{}
	}
	return value
}