#!/bin/bash
set -e

query() {
    page=$1
    offset=$((page * 100))

    # shellcheck disable=SC2016
    curl -sSLf 'https://leetcode.com/graphql/' \
        --compressed \
        -H 'content-type: application/json' \
        --data-raw '{
            "query": "\n    query problemsetQuestionListV2($filters: QuestionFilterInput, $limit: Int, $searchKeyword: String, $skip: Int, $sortBy: QuestionSortByInput, $categorySlug: String) {\n  problemsetQuestionListV2(\n    filters: $filters\n    limit: $limit\n    searchKeyword: $searchKeyword\n    skip: $skip\n    sortBy: $sortBy\n    categorySlug: $categorySlug\n  ) {\n    questions {\n      id\n      titleSlug\n      title\n      translatedTitle\n      questionFrontendId\n      paidOnly\n      difficulty\n      topicTags {\n        name\n        slug\n        nameTranslated\n      }\n      status\n      isInMyFavorites\n      frequency\n      acRate\n      contestPoint\n    }\n    totalLength\n    finishedLength\n    hasMore\n  }\n}\n    ",
            "variables": {
                "skip": '"$offset"',
                "limit": 100,
                "categorySlug": "all-code-essentials",
                "filters": {"filterCombineType":"ALL","statusFilter":{"questionStatuses":[],"operator":"IS"},"difficultyFilter":{"difficulties":[],"operator":"IS"},"languageFilter":{"languageSlugs":[],"operator":"IS"},"topicFilter":{"topicSlugs":[],"operator":"IS"},"acceptanceFilter":{},"frequencyFilter":{},"frontendIdFilter":{},"lastSubmittedFilter":{},"publishedFilter":{},"companyFilter":{"companySlugs":[],"operator":"IS"},"positionFilter":{"positionSlugs":[],"operator":"IS"},"positionLevelFilter":{"positionLevelSlugs":[],"operator":"IS"},"contestPointFilter":{"contestPoints":[],"operator":"IS"},"premiumFilter":{"premiumStatus":[],"operator":"IS"}},
                "searchKeyword": "",
                "sortBy": {"sortField":"CUSTOM","sortOrder":"ASCENDING"},
                "filtersV2": {"filterCombineType":"ALL","statusFilter":{"questionStatuses":[],"operator":"IS"},"difficultyFilter":{"difficulties":[],"operator":"IS"},"languageFilter":{"languageSlugs":[],"operator":"IS"},"topicFilter":{"topicSlugs":[],"operator":"IS"},"acceptanceFilter":{},"frequencyFilter":{},"frontendIdFilter":{},"lastSubmittedFilter":{},"publishedFilter":{},"companyFilter":{"companySlugs":[],"operator":"IS"},"positionFilter":{"positionSlugs":[],"operator":"IS"},"positionLevelFilter":{"positionLevelSlugs":[],"operator":"IS"},"contestPointFilter":{"contestPoints":[],"operator":"IS"},"premiumFilter":{"premiumStatus":[],"operator":"IS"}}
            },
            "operationName": "problemsetQuestionListV2"
        }' | jq -c '.data.problemsetQuestionListV2.questions[] | { id, title, titleSlug, difficulty, paidOnly, tags: [ .topicTags[] | .slug ] }'
}

page=0
while true; do
    echo -ne "  Querying page $((page + 1)) ...\r" >&2
    content=$(query $page)
    lines=$(echo "$content" | wc -l)
    echo "$content"

    [ "$lines" -lt 100 ] && break
    page=$((page + 1))
done | jq -s -c 'sort_by(.id) | .[]'
echo >&2