package lsp

import (
	"config-lsp/common"
	aliases "config-lsp/handlers/aliases/lsp"
	fstab "config-lsp/handlers/fstab/lsp"
	hosts "config-lsp/handlers/hosts/lsp"
	sshconfig "config-lsp/handlers/ssh_config/lsp"
	sshdconfig "config-lsp/handlers/sshd_config/lsp"
	wireguard "config-lsp/handlers/wireguard/lsp"
	"config-lsp/root-handler/shared"

	"github.com/tliron/glsp"
	protocol "github.com/tliron/glsp/protocol_3_16"
)

func TextDocumentDidChange(context *glsp.Context, params *protocol.DidChangeTextDocumentParams) error {
	language := shared.Handler.GetLanguageForDocument(params.TextDocument.URI)

	content := params.ContentChanges[0].(protocol.TextDocumentContentChangeEventWhole).Text

	if _, found := shared.OpenedFiles[params.TextDocument.URI]; !found {
		// The file couldn't be initialized when opening it,
		// so we will try it again here

		newLanguage, err := initFile(
			context,
			content,
			params.TextDocument.URI,
			"",
		)

		if err != nil {
			if common.ServerOptions.NoUndetectableErrors {
				return nil
			} else {
				return err
			}
		}

		if *newLanguage != *language {
			language = newLanguage

			params := &protocol.DidOpenTextDocumentParams{
				TextDocument: protocol.TextDocumentItem{
					URI:        params.TextDocument.URI,
					Text:       content,
					Version:    params.TextDocument.Version,
					LanguageID: string(*language),
				},
			}

			return TextDocumentDidOpen(context, params)
		}
	}

	switch *language {
	case shared.LanguageFstab:
		return fstab.TextDocumentDidChange(context, params)
	case shared.LanguageSSHDConfig:
		return sshdconfig.TextDocumentDidChange(context, params)
	case shared.LanguageSSHConfig:
		return sshconfig.TextDocumentDidChange(context, params)
	case shared.LanguageWireguard:
		return wireguard.TextDocumentDidChange(context, params)
	case shared.LanguageHosts:
		return hosts.TextDocumentDidChange(context, params)
	case shared.LanguageAliases:
		return aliases.TextDocumentDidChange(context, params)
	}

	panic("root-handler/TextDocumentDidChange: unexpected language" + *language)
}