package user

import (
	"net/url"

	"gno.land/p/jeronimoalbi/pager"
	"gno.land/p/nt/ufmt"
	"gno.land/r/akkadia/admin"
)

// Render handles RESTful routing and returns Markdown responses
func Render(iUrl string) string {
	u, err := url.Parse(iUrl)
	if err != nil {
		return "404\n"
	}

	query := u.Query()

	switch u.Path {
	case "":
		return renderHome()
	case "users":
		return renderUsersList(iUrl)
	case "user":
		addr := address(query.Get("address"))
		return renderUser(iUrl, addr)
	default:
		return renderError("Not found")
	}
}

// renderHome renders the home page
func renderHome() string {
	output := `# AKKADIA User

## Introduction

User realm manages user profiles for AKKADIA.

- **properties**: Admin-managed user attributes
- **metadatas**: User-managed personal data

## Stats

`
	output += ufmt.Sprintf("* **Total Users**: %d\n", GetTotalUserSize())
	output += `
## Quick Links

* [Browse Users](/r/akkadia/user:users)

## User Lookup

<gno-form path="user">
  <gno-input name="address" placeholder="Enter the address" />
</gno-form>
`
	return output
}

// renderUsersList renders a list of all users with pagination
func renderUsersList(iUrl string) string {
	output := "# Users\n\n"
	output += "[← Home](/r/akkadia/user:)\n\n"

	if properties.Size() == 0 {
		output += "*No users registered yet.*\n"
		return output
	}

	pages, err := pager.New(iUrl, properties.Size(), pager.WithPageSize(20))
	if err != nil {
		return renderError("Invalid page")
	}

	// Get current page number for back links
	currentPage := (pages.Offset() / pages.PageSize()) + 1

	properties.IterateByOffset(pages.Offset(), pages.PageSize(), func(key string, _ interface{}) bool {
		output += ufmt.Sprintf("* [%s](/r/akkadia/user:user?address=%s&page=%d)\n", key, key, currentPage)
		return false
	})

	if pages.HasPages() {
		output += "\n" + pager.Picker(pages)
	}

	return output
}

// renderUser renders a single user detail
func renderUser(iUrl string, addr address) string {
	if !addr.IsValid() {
		return renderError("Invalid address")
	}

	u, _ := url.Parse(iUrl)
	page := u.Query().Get("page")

	addrStr := addr.String()
	props, propsFound := properties.Get(addrStr)
	metas, metasFound := metadatas.Get(addrStr)

	if !propsFound && !metasFound {
		return renderError("User not found")
	}

	output := "# User Detail\n\n"
	if page != "" {
		output += ufmt.Sprintf("[← Back to List](/r/akkadia/user:users?page=%s)\n\n", page)
	} else {
		output += "[← Home](/r/akkadia/user:)\n\n"
	}
	output += ufmt.Sprintf("* **Address**: %s [[View on Explorer](%s/m/explorer/player?address=%s)]\n\n", addrStr, admin.GetExplorerURL(), addrStr)

	if propsFound {
		output += "## Properties\n\n"
		for k, v := range props.(map[string]string) {
			if k == "address" {
				continue
			}
			output += ufmt.Sprintf("* **%s**: %s\n", k, v)
		}
		output += "\n"
	}

	if metasFound {
		output += "## Metadata\n\n"
		for k, v := range metas.(map[string]string) {
			if k == "address" {
				continue
			}
			output += ufmt.Sprintf("* **%s**: %s\n", k, v)
		}
	}

	return output
}

// renderError renders an error page
func renderError(message string) string {
	output := "# Error\n\n"
	output += ufmt.Sprintf("> %s\n\n", message)
	output += "[← Back to Home](/r/akkadia/user:)\n"
	return output
}