package model

import (
	"database/sql/driver"
	"encoding/json"
	"fmt"
	"time"

	"gorm.io/datatypes"
	"gorm.io/gorm"
)

// ===========================
// Integration Hook types
// ===========================
// NOTE: HookType and HookStatus are declared in enums.go; additional HookType
// constants for integration hooks (webhook/slack/shopify/linear/notion) are
// also in enums.go.

// IntegrationHook represents a third-party integration hook configuration.
// Reference: Chatwoot Integrations::Hook — webhook/app integration bindings
// Each hook belongs to an account and optionally to an inbox (for channel-specific integrations).
// Hooks store provider-specific settings in the `settings` JSONB field.
type IntegrationHook struct {
	ID          uint           `gorm:"primaryKey;autoIncrement" json:"id"`
	AccountID   uint           `gorm:"not null;index" json:"account_id"`
	InboxID     *uint          `gorm:"index" json:"inbox_id,omitempty"`         // nil = account-level hook
	HookType    HookType       `gorm:"size:50;not null;index" json:"hook_type"` // webhook/slack/shopify/linear/notion
	Status      HookStatus     `gorm:"size:20;default:'active'" json:"status"`   // active/inactive
	URL         string         `gorm:"size:1024" json:"url"`                     // webhook callback URL
	AccessToken string         `gorm:"size:256;uniqueIndex" json:"access_token,omitempty"` // API token for the hook
	Settings    datatypes.JSON `gorm:"type:jsonb" json:"settings"`              // provider-specific config (Slack channel_id, Shopify shop_domain, etc.)
	CreatedAt   time.Time      `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt   time.Time      `gorm:"autoUpdateTime" json:"updated_at"`
	DeletedAt   gorm.DeletedAt `gorm:"index" json:"deleted_at,omitempty"`
}

// IntegrationApp represents an available integration app definition.
// Reference: Chatwoot Integrations::App — catalog of supported integrations
type IntegrationApp struct {
	ID          uint           `gorm:"primaryKey;autoIncrement" json:"id"`
	Name        string         `gorm:"size:255;not null" json:"name"`
	Description string         `gorm:"size:512" json:"description"`
	HookType    HookType       `gorm:"size:50;not null;uniqueIndex" json:"hook_type"`
	Icon        string         `gorm:"size:512" json:"icon"`          // icon URL or CSS class
	ActionURL   string         `gorm:"size:1024" json:"action_url"`   // frontend action URL for the integration setup page
	Enabled     bool           `gorm:"default:true" json:"enabled"`   // whether the integration is available for installation
	CreatedAt   time.Time      `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt   time.Time      `gorm:"autoUpdateTime" json:"updated_at"`
}

// SlackSettings holds Slack integration-specific configuration.
// Reference: Chatwoot Integrations::SlackController settings
type SlackSettings struct {
	ChannelID   string `json:"channel_id"`
	ChannelName string `json:"channel_name"`
	SlackToken  string `json:"slack_token,omitempty"`
}

// ShopifySettings holds Shopify integration-specific configuration.
// Reference: Chatwoot Integrations::ShopifyController settings
type ShopifySettings struct {
	ShopDomain string `json:"shop_domain"`
	AccessToken string `json:"access_token,omitempty"`
}

// LinearSettings holds Linear integration-specific configuration.
// Reference: Chatwoot Integrations::LinearController settings
type LinearSettings struct {
	TeamID      string `json:"team_id"`
	TeamName    string `json:"team_name"`
	AccessToken string `json:"access_token,omitempty"`
	ProjectID   string `json:"project_id,omitempty"`
}

// NotionSettings holds Notion integration-specific configuration.
type NotionSettings struct {
	DatabaseID  string `json:"database_id,omitempty"`
	AccessToken string `json:"access_token,omitempty"`
}

// HookSettingsMap is a JSON type for IntegrationHook.Settings that implements driver.Valuer/sql.Scanner.
type HookSettingsMap map[string]interface{}

func (h HookSettingsMap) Value() (driver.Value, error) {
	if h == nil {
		return json.Marshal(map[string]interface{}{})
	}
	return json.Marshal(h)
}

func (h *HookSettingsMap) Scan(value interface{}) error {
	if value == nil {
		*h = HookSettingsMap{}
		return nil
	}
	bytes, ok := value.([]byte)
	if !ok {
		return fmt.Errorf("failed to unmarshal HookSettingsMap: %v", value)
	}
	return json.Unmarshal(bytes, h)
}