package platform

import (
	"net/http"

	"git.apinb.com/heqiapp/platforms/backend/api/internal/logic/common"
	"github.com/gin-gonic/gin"
)

// ResourceMode describes the operations a platform-admin resource supports.
type ResourceMode string

const (
	Writable   ResourceMode = "writable"
	ReadOnly   ResourceMode = "readonly"
	AppendOnly ResourceMode = "append_only"
	Editable   ResourceMode = "editable"
	Managed    ResourceMode = "managed"
)

// ResourceContract is the expected cross-layer representation of one resource.
type ResourceContract struct {
	Domain   string
	Name     string
	Path     string
	PageKind string
	Mode     ResourceMode
}

// ResourceDefinition describes a route resource and the fields it may change.
type ResourceDefinition struct {
	Domain       string
	Name         string
	Model        func() any
	Mode         ResourceMode
	CreateFields []string
	UpdateFields []string
}

// Allows reports whether a resource mode supports an HTTP method.
func (d ResourceDefinition) Allows(method string) bool {
	switch d.Mode {
	case ReadOnly:
		return method == http.MethodGet
	case AppendOnly:
		return method == http.MethodGet || method == http.MethodPost
	case Editable:
		return method == http.MethodGet || method == http.MethodPost || method == http.MethodPut || method == http.MethodPatch
	case Managed:
		return method == http.MethodGet || method == http.MethodPost || method == http.MethodPut
	case Writable:
		return method == http.MethodGet || method == http.MethodPost || method == http.MethodPut || method == http.MethodPatch || method == http.MethodDelete
	default:
		return false
	}
}

func archiveValues() gin.H {
	return gin.H{"status": common.StatusArchived}
}

func filterFields(values map[string]any, allowedFields []string) gin.H {
	allowed := make(map[string]struct{}, len(allowedFields))
	for _, field := range allowedFields {
		allowed[field] = struct{}{}
	}

	filtered := make(gin.H, len(allowed))
	for field, value := range values {
		if _, ok := allowed[field]; ok {
			filtered[field] = value
		}
	}
	return filtered
}

// ExpectedResources returns the complete platform-admin resource catalogue.
func ExpectedResources() []ResourceContract {
	return []ResourceContract{
		resourceContract("gas", "gas_basic", Writable, "list"), resourceContract("gas", "gas_account", Writable, "list"),
		resourceContract("delivery", "delivery_basic", Writable, "list"), resourceContract("delivery", "delivery_account", Writable, "list"),
		resourceContract("staff", "staff_account", Writable, "list"), resourceContract("staff", "staff_credential", Writable, "list"),
		resourceContract("user", "user_account", Writable, "list"), resourceContract("user", "user_address", Writable, "list"), resourceContract("user", "user_service_relation", Writable, "list"),
		resourceContract("product", "product_type", Editable, "list"), resourceContract("product", "product_warehouse", Editable, "list"), resourceContract("product", "product_info", Editable, "list"), resourceContract("product", "product_repair", Editable, "list"), resourceContract("product", "product_owner", ReadOnly, "list"),
		resourceContract("ec", "ec_category", Writable, "list"), resourceContract("ec", "ec_product", Writable, "list"), resourceContract("ec", "ec_product_attribute", Writable, "list"), resourceContract("ec", "ec_product_image", Writable, "list"), resourceContract("ec", "ec_cart", ReadOnly, "list"), resourceContract("ec", "ec_order", ReadOnly, "list"), resourceContract("ec", "ec_order_item", ReadOnly, "list"), resourceContract("ec", "ec_review", ReadOnly, "list"),
		resourceContract("gasorder", "gasorder_contract", Managed, "list"), resourceContract("gasorder", "gasorder_contract_product", AppendOnly, "list"), resourceContract("gasorder", "gasorder_contract_revision", ReadOnly, "list"),
		resourceContract("gasorder", "gasorder_basic", AppendOnly, "list"), resourceContract("gasorder", "gasorder_item", ReadOnly, "list"), resourceContract("gasorder", "gasorder_assign", ReadOnly, "list"), resourceContract("gasorder", "gasorder_status", ReadOnly, "list"),
		resourceContract("gasorder", "gasorder_track", ReadOnly, "list"), resourceContract("gasorder", "gasorder_track_point", ReadOnly, "list"), resourceContract("gasorder", "gasorder_confirm", ReadOnly, "list"), resourceContract("gasorder", "gasorder_payment", ReadOnly, "list"),
		resourceContract("finance", "fin_payment", ReadOnly, "list"), resourceContract("finance", "fin_settlement", Writable, "list"), resourceContract("finance", "fin_reconciliation", ReadOnly, "list"),
		resourceContract("content", "cms_content", Writable, "list"), resourceContract("customer_service", "cs_ticket", Writable, "list"),
		resourceContract("platform", "platform_account", Writable, "list"), resourceContract("platform", "platform_role", Writable, "list"), resourceContract("platform", "platform_menu", ReadOnly, "tree"),
		resourceContract("wallet", "wallet_basic", ReadOnly, "list"), resourceContract("wallet", "wallet_bank", ReadOnly, "list"), resourceContract("wallet", "wallet_payment", ReadOnly, "list"), resourceContract("wallet", "wallet_record", ReadOnly, "list"), resourceContract("wallet", "wallet_refund", ReadOnly, "list"), resourceContract("wallet", "wallet_apply_cash", ReadOnly, "list"),
	}
}

func resourceContract(domain, name string, mode ResourceMode, pageKind string) ResourceContract {
	return ResourceContract{Domain: domain, Name: name, Path: resourcePath(domain, name), Mode: mode, PageKind: pageKind}
}

func resourcePath(domain, name string) string {
	return "/" + name
}