// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package model

import (
	"net/http"
	"slices"
	"unicode/utf8"
)

const (
	ContentFlaggingGroupName   = "content_flagging"
	ContentFlaggingPostType    = PostCustomTypePrefix + "spillage_report"
	ContentFlaggingBotUsername = "content-review"

	commentMaxRunes = 1000

	AsContentReviewerParam = "as_content_reviewer"
)

const (
	ContentFlaggingStatusPending  = "Pending"
	ContentFlaggingStatusAssigned = "Assigned"
	ContentFlaggingStatusRemoved  = "Removed"
	ContentFlaggingStatusRetained = "Retained"
)

type FlagContentRequest struct {
	Reason  string `json:"reason"`
	Comment string `json:"comment,omitempty"`
}

func (f *FlagContentRequest) IsValid(commentRequired bool, validReasons []string) *AppError {
	if f.Reason == "" {
		return NewAppError("FlagContentRequest.IsValid", "api.content_flagging.error.reason_required", nil, "", http.StatusBadRequest)
	}

	if !slices.Contains(validReasons, f.Reason) {
		return NewAppError("FlagContentRequest.IsValid", "api.content_flagging.error.reason_invalid", nil, "", http.StatusBadRequest)
	}

	if commentRequired && f.Comment == "" {
		return NewAppError("FlagContentRequest.IsValid", "api.content_flagging.error.comment_required", nil, "", http.StatusBadRequest)
	}

	if utf8.RuneCountInString(f.Comment) > commentMaxRunes {
		return NewAppError("FlagContentRequest.IsValid", "api.content_flagging.error.comment_too_long", map[string]any{"MaxLength": commentMaxRunes}, "", http.StatusBadRequest)
	}

	return nil
}

type FlagContentActionRequest struct {
	Comment string `json:"comment,omitempty"`
}

func (f *FlagContentActionRequest) IsValid(commentRequired bool) *AppError {
	if commentRequired && f.Comment == "" {
		return NewAppError("FlagContentActionRequest.IsValid", "api.content_flagging.error.comment_required", nil, "", http.StatusBadRequest)
	}

	if utf8.RuneCountInString(f.Comment) > commentMaxRunes {
		return NewAppError("FlagContentActionRequest.IsValid", "api.content_flagging.error.comment_too_long", map[string]any{"MaxLength": commentMaxRunes}, "", http.StatusBadRequest)
	}

	return nil
}