var ReportWeeklyApi = (function () {
    "use strict"

    let selectedYearWeek = {
        "year": null,
        "week": null
    }

    // Time
    // Time API ->
    // 1. 일정 진행도 (차트)
    // 2. 일정 준수율
    // 3. 지연된 일정의 수
    var time_data = {
        "start_date" : null,
        "end_date" : null,
        "current_date" : null,
        "week_number" : 1, // 주차
    }

    // Scope
    // 1. 금주 완료 증감
    // 2. 신규 추가 건수
    // 3. 요구사항 현황 (차트)
    var scope_data = {
        "total" : 0,    // 총합
        "folder" : 0,   // 폴더타입
        "not-open" : 0, // 열림 제외(진행중, 해결됨, 닫힘)
        "resolved-and-closed" : 0, // 해결됨+닫힘
        "open" : 0,        // 열림
        "in-progress" : 0, // 진행중
        "resolved" : 0,    // 해결됨
        "closed" : 0       // 닫힘
    }

    // Resource
    // 1. 총 가동인원
    // 2. 금주 작업 인원
    // 3. Top3 기여자
    // 인당 처리량 -> 금주
    var resource = {
        "total_resource": 0,
        "active_resource": 0, // 금주 작업 인원
        "total_avg": 0,
        "top3_resource": "" // 동점 포함?
    }

    // ========== 공통 함수 ==========

    function splitYearWeek(selectedWeek) {
        if (selectedWeek) {
            let [year, week] = selectedWeek.split("-W");
            selectedYearWeek.year = year;
            selectedYearWeek.week = week;
        }
    }

    function formatDate(date) {
        if (!(date instanceof Date)) {
            date = new Date(date);
        }
        const year = date.getFullYear();
        const month = (date.getMonth() + 1).toString().padStart(2, "0");
        const day = date.getDate().toString().padStart(2, "0");

        return `${year}-${month}-${day}`;
    }

    function buildRequestDTO(pdServiceId, pdServiceName,pdServiceVersionLinks, startDate, endDate) {
        return {
            "pdServiceId": pdServiceId,
            "pdServiceName": pdServiceName,
            "pdServiceVersions": pdServiceVersionLinks.split(',').map(Number),
            "reportYear": selectedYearWeek.year,
            "reportWeek": selectedYearWeek.week,
            "weekStartDate": formatDate(startDate),
            "weekEndDate": formatDate(endDate)
        };
    }

    function fetchWeeklyData(endpoint, requestDTO) {
        return $.ajax({
            url: `/auth-user/api/arms/report/weekly/${endpoint}`,
            type: "POST",
            data: JSON.stringify(requestDTO),
            contentType: "application/json;charset=UTF-8",
            dataType: "json",
            progress: true
        });
    }

    // ========== 개별 API 호출 ==========

    var fetchTimeData = function (requestDTO) {
        return fetchWeeklyData("time", requestDTO);
    }

    var fetchScopeData = function (requestDTO) {
        return fetchWeeklyData("scope", requestDTO);
    }

    var fetchResourceData = function (requestDTO) {
        return fetchWeeklyData("resource", requestDTO);
    }

		// 이전 Blob URL을 저장 (메모리 누수 방지용)
		var previousBlobUrl = null;

		var fetchPDF = function (pdServiceId, pdServiceName, pdServiceVersionLinks, selectedWeek, startDate, endDate, displayMode) {
			splitYearWeek(selectedWeek);
			let dto = buildRequestDTOPDF(pdServiceId, pdServiceName, pdServiceVersionLinks, startDate, endDate, displayMode);

			// byte[] 다운로드를 위해 blob 타입으로 요청
			return $.ajax({
				url: `/auth-user/api/arms/report/weekly/export/pdf`,
				type: "POST",
				data: JSON.stringify(dto),
				contentType: "application/json;charset=UTF-8",
				xhrFields: {
					responseType: 'blob'  // binary 데이터 수신
				},
				success: function(blob, status, xhr) {
					// 이전 Blob URL 해제 (메모리 누수 방지)
					if (previousBlobUrl) {
						URL.revokeObjectURL(previousBlobUrl);
					}

					// Blob URL 생성
					var blobUrl = URL.createObjectURL(blob);
					previousBlobUrl = blobUrl;

					// PDF.js viewer에 Blob URL 전달
					var viewerBaseUrl = "../reference/jquery-plugins/pdfjs-3.11.174-dist/web/viewer.html";
					var viewerUrl = viewerBaseUrl + "?file=" + encodeURIComponent(blobUrl) + "#zoom=page-width";

					// iframe src 업데이트
					$("#pdf-viewer-iframe").attr("src", viewerUrl);

					// 다운로드 버튼 업데이트
					var contentDisposition = xhr.getResponseHeader('Content-Disposition');
					var filename = "WeeklyReport_" + selectedYearWeek.year + "W" + selectedYearWeek.week + ".pdf";

					if (contentDisposition) {
						var filenameMatch = contentDisposition.match(/filename\*?=(?:UTF-8'')?["']?([^"';\n]+)["']?/i);
						if (filenameMatch && filenameMatch[1]) {
							filename = decodeURIComponent(filenameMatch[1]);
						}
					}

					$("#btn-pdf-download")
						.attr("href", blobUrl)
						.attr("download", filename);

					console.log("[ ReportWeeklyApi :: fetchPDF ] :: PDF 로드 완료 => ", filename);
				},
				error: function(xhr, status, error) {
					console.error("[ ReportWeeklyApi :: fetchPDF ] :: 가져오기 실패 => ", error);
					jError("PDF 파일 가져오기에 실패했습니다.");
				}
			});
		}

	function buildRequestDTOPDF(pdServiceId, pdServiceName,pdServiceVersionLinks, startDate, endDate, displayMode) {
		return {
			"pdServiceId": pdServiceId,
			"pdServiceName": pdServiceName,
			"pdServiceVersions": pdServiceVersionLinks.split(',').map(Number),
			"reportYear": selectedYearWeek.year,
			"reportWeek": selectedYearWeek.week,
			"weekStartDate": formatDate(startDate),
			"weekEndDate": formatDate(endDate),
			"display": displayMode
		};
	}

    var fetchExportPPT = function (pdServiceId, pdServiceName, pdServiceVersionLinks, selectedWeek, startDate, endDate) {
        splitYearWeek(selectedWeek);
        let dto = buildRequestDTO(pdServiceId, pdServiceName, pdServiceVersionLinks, startDate, endDate);

        // byte[] 다운로드를 위해 blob 타입으로 요청
        return $.ajax({
            url: `/auth-user/api/arms/report/weekly/export`,
            type: "POST",
            data: JSON.stringify(dto),
            contentType: "application/json;charset=UTF-8",
            xhrFields: {
                responseType: 'blob'  // binary 데이터 수신
            },
            success: function(blob, status, xhr) {
                // Content-Disposition 헤더에서 파일명 추출
                var contentDisposition = xhr.getResponseHeader('Content-Disposition');
                var filename = "WeeklyReport.pptx";

                if (contentDisposition) {
                    var filenameMatch = contentDisposition.match(/filename\*?=(?:UTF-8'')?["']?([^"';\n]+)["']?/i);
                    if (filenameMatch && filenameMatch[1]) {
                        filename = decodeURIComponent(filenameMatch[1]);
                    }
                }

                // Blob URL 생성 및 다운로드
                var downloadUrl = URL.createObjectURL(blob);
                var a = document.createElement('a');
                a.href = downloadUrl;
                a.download = filename;
                document.body.appendChild(a);
                a.click();
                document.body.removeChild(a);
                URL.revokeObjectURL(downloadUrl);

                console.log("[ ReportWeeklyApi :: fetchExportPPT ] :: 다운로드 완료 => ", filename);
            },
            error: function(xhr, status, error) {
                console.error("[ ReportWeeklyApi :: fetchExportPPT ] :: 다운로드 실패 => ", error);
                jError("PPTX 다운로드에 실패했습니다.");
            }
        });
    }

    // ========== 통합 API 호출 ==========

    var fetchAllWeeklyData = function (pdServiceId, pdServiceName, pdServiceVersionLinks, selectedWeek, startDate, endDate) {
        splitYearWeek(selectedWeek);

        console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: pdServiceId => ", pdServiceId);
        console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: pdServiceName => ", pdServiceName);
        console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: pdServiceVersionLinks => ", pdServiceVersionLinks);
        console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: selectedWeek => ", selectedYearWeek.year + "-W" + selectedYearWeek.week);
        console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: startDate => ", startDate);
        console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: endDate => ", endDate);

        const requestDTO = buildRequestDTO(pdServiceId, pdServiceName, pdServiceVersionLinks, startDate, endDate);

        return Promise.all([
            fetchTimeData(requestDTO),
            fetchScopeData(requestDTO),
            fetchResourceData(requestDTO)
        ]).then(([timeResult, scopeResult, resourceResult]) => {
            console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: timeResult => ", timeResult);
            console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: scopeResult => ", scopeResult);
            console.log("[ ReportWeeklyApi :: fetchAllWeeklyData ] :: resourceResult => ", resourceResult);

            return {
                time: timeResult,
                scope: scopeResult,
                resource: resourceResult
            };
        });
    }

    return {
        fetchTimeData,
        fetchScopeData,
        fetchResourceData,
        fetchAllWeeklyData,
        buildRequestDTO,
        splitYearWeek,
        fetchExportPPT,
		fetchPDF
    };
})(); // 즉시 실행 함수