package handlers

import (
	"config-lsp/common"
	"fmt"
	"unicode/utf8"

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

func ClearDiagnostics(context *glsp.Context, uri protocol.DocumentUri) {
	context.Notify(
		"textDocument/publishDiagnostics",
		protocol.PublishDiagnosticsParams{
			URI:         uri,
			Diagnostics: []protocol.Diagnostic{},
		},
	)
}

func SendDiagnosticsFromParserErrors(context *glsp.Context, uri protocol.DocumentUri, parserErrors []common.ParserError) {
	diagnosticErrors := make([]protocol.Diagnostic, 0)

	for _, parserError := range parserErrors {
		switch parserError.(type) {
		case common.OptionAlreadyExistsError:
			{
				err := parserError.(common.OptionAlreadyExistsError)
				existingOption, _ := Parser.GetOption(err.Option)

				diagnosticErrors = append(diagnosticErrors, protocol.Diagnostic{
					Range: protocol.Range{
						Start: protocol.Position{
							Line:      err.FoundOnLine,
							Character: 0,
						},
						End: protocol.Position{
							Line:      err.FoundOnLine,
							Character: uint32(utf8.RuneCountInString(err.Option)),
						},
					},
					Message: fmt.Sprintf("Option '%s' has already been declared on line %v", err.Option, existingOption.Position.Line+1),
				})
			}
		}
	}

	context.Notify(
		"textDocument/publishDiagnostics",
		protocol.PublishDiagnosticsParams{
			URI:         uri,
			Diagnostics: diagnosticErrors,
		},
	)
}

func SendDiagnosticsFromAnalyzerErrors(context *glsp.Context, uri protocol.DocumentUri, errors []common.ValueError) {
	diagnosticErrors := make([]protocol.Diagnostic, 0)

	for _, err := range errors {
		diagnosticErrors = append(diagnosticErrors, protocol.Diagnostic{
			Range: protocol.Range{
				Start: protocol.Position{
					Line:      uint32(err.Line),
					Character: uint32(err.Start),
				},
				End: protocol.Position{
					Line:      uint32(err.Line),
					Character: uint32(err.End),
				},
			},
			Message: err.Error.Error(),
		})
	}

	context.Notify(
		"textDocument/publishDiagnostics",
		protocol.PublishDiagnosticsParams{
			URI:         uri,
			Diagnostics: diagnosticErrors,
		},
	)
}