// Copyright 2023 The Gitea Authors. All rights reserved.
// Copyright 2025 The Forgejo Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package lintLocaleUsage

import (
	"fmt"
	"go/ast"
	"go/token"
	"strconv"
	"strings"
)

func (handler Handler) HandleGoTrBasicLit(fset *token.FileSet, argLit *ast.BasicLit, prefix string) {
	if argLit.Kind == token.STRING {
		// extract string content
		arg, err := strconv.Unquote(argLit.Value)
		if err != nil {
			return
		}
		// found interesting strings
		arg = prefix + arg
		if strings.HasSuffix(arg, ".") || strings.HasSuffix(arg, "_") {
			prep, trunc := PrepareMsgidPrefix(arg)
			if trunc {
				handler.OnWarning(fset, argLit.ValuePos, fmt.Sprintf("needed to truncate message id prefix: %s", arg))
			}
			handler.OnMsgidPrefix(fset, argLit.ValuePos, prep, trunc)
		} else {
			handler.OnMsgid(fset, argLit.ValuePos, arg, false)
		}
	}
}

func (handler Handler) HandleGoTrArgument(fset *token.FileSet, n ast.Expr, prefix string) {
	if argLit, ok := n.(*ast.BasicLit); ok {
		handler.HandleGoTrBasicLit(fset, argLit, prefix)
	} else if argBinExpr, ok := n.(*ast.BinaryExpr); ok {
		if argBinExpr.Op != token.ADD {
			// pass
		} else if argLit, ok := argBinExpr.X.(*ast.BasicLit); ok && argLit.Kind == token.STRING {
			// extract string content
			arg, err := strconv.Unquote(argLit.Value)
			if err != nil {
				return
			}
			// found interesting strings
			arg = prefix + arg
			prep, trunc := PrepareMsgidPrefix(arg)
			if trunc {
				handler.OnWarning(fset, argLit.ValuePos, fmt.Sprintf("needed to truncate message id prefix: %s", arg))
			}
			handler.OnMsgidPrefix(fset, argLit.ValuePos, prep, trunc)
		}
	}
}

func (handler Handler) HandleGoCommentGroup(fset *token.FileSet, cg *ast.CommentGroup, commentPrefix string) *string {
	if cg == nil {
		return nil
	}
	var matches []token.Pos
	matchInsPrefix := ""
	commentPrefix = "//" + commentPrefix
	for _, comment := range cg.List {
		ctxt := strings.TrimSpace(comment.Text)
		if ctxt == commentPrefix {
			matches = append(matches, comment.Slash)
		} else if after, found := strings.CutPrefix(ctxt, commentPrefix+"Suffix "); found {
			matches = append(matches, comment.Slash)
			matchInsPrefix = strings.TrimSpace(after)
		}
	}
	switch len(matches) {
	case 0:
		return nil
	case 1:
		return &matchInsPrefix
	default:
		handler.OnWarning(
			fset,
			matches[0],
			fmt.Sprintf("encountered multiple %s... directives, ignoring", strings.TrimSpace(commentPrefix)),
		)
		return &matchInsPrefix
	}
}