from collections import defaultdict
from pathlib import Path
from cognos11.c11_api import c11_api
import config
import json
import logging
import os
from datetime import datetime
from dataclasses import dataclass


@dataclass
class ReportRequest:
    report_id: str
    params: dict
    filename: str
    report_format: str


class c11_export:
    api: c11_api
    cfg: config.Config = None

    def __init__(self, cfg=None, api=None):
        self.cfg = cfg
        if cfg is None:
            self.cfg = config.Config()
        self.api = api
        if api is None:
            # if self.cfg.cognos11.
            self.api = c11_api(cfg).login()

        now = datetime.now().strftime("%Y%m%d_%H%M%S")
        prot_file = f"{self.cfg.cognos11.logs_dir}/c11_export_{now}.log"
        os.makedirs(self.cfg.cognos11.logs_dir, exist_ok=True)
        logging.basicConfig(
            filename=prot_file,
            filemode="w",
            encoding="utf-8",
            level=logging.INFO,
            force=True,
        )

    @staticmethod
    def get_folder(folder, format="PDF"):
        if folder == "":
            folder = "Team Content" if format == "XML" else "Team Content/ReportOutput"
        elif not folder.startswith("Team Content"):
            folder = "Team Content/ReportOutput/" + folder
        return folder

    def export_folder(self, folder="", overwrite=False) -> None:
        folder = self.get_folder(folder, "XML")
        reports = self.api.get_reports_in_folder(folder, True)
        for r in reports:
            if self.is_obsolete_or_ignored(r):
                continue
            self.export_unstubbed(r["id"], overwrite)

    @staticmethod
    def is_obsolete_or_ignored(report):
        if report["type"] != "report":
            return True
        path: str = report["path"]
        if "_/" in path or path.endswith("_"):
            return True
        for prefix in ["Team Content/Templates", "Team Content/Beispiele", "Team Content/Kalender"]:
            if path.startswith(prefix):
                return True
        name: str = report["name"]
        if name.endswith("_") or "Kopie" in name:
            return True
        return False

    def export_unstubbed(self, report_id, overwrite=False):
        report = self.api.get_report(report_id)
        if "error" in report:
            return

        params = self.get_params(report, {})
        request = ReportRequest(report["id"], params, report["filename"], report["format"])
        # test if execution of report is possible
        self.request_and_save_file(request, save=False)

        filename = f"{self.cfg.cognos11.specs_dir}/{report['path']}/{report['name']}.xml"
        modified = datetime.fromisoformat(report["modified"]).timestamp()
        if not overwrite and Path(filename).exists() and Path(filename).stat().st_mtime > modified:
            return

        unstubbed_report = self.api.request_unstubbed(report_id)
        if unstubbed_report:
            print(f"{report['path']}/{report['name']}")
            os.makedirs(os.path.dirname(filename), exist_ok=True)
            with open(filename, "w") as f:
                f.write(unstubbed_report)

    def get_folder_pdf_request_plan(self, folder=""):
        folder = self.get_folder(folder, "PDF")
        reports = self.api.get_reports_in_folder(folder, True)
        return [self.export_pdf(r["id"]) for r in reports]

    def export_pdf(self, report_id, folder=None):
        report = self.api.get_report(report_id)
        if report["type"] == "shortcut":
            report_link = report
            report = self.api.get_report(report["target_id"]).copy()
            for k in ("name", "description", "path", "type", "filename"):
                report[k] = report_link[k]
            json.dump(report, open("dump.json", "w"), indent=2)
        if "meta" not in report:
            logging.warning(report["name"] + " is not accessible!")
            return []

        if len(report["params"]) == 0:
            filename = report["filename"]
            params = self.get_params(report, {})
            return [ReportRequest(report["id"], params, filename, report["format"])]
        result = []
        if len(report["params"]) == 1:
            filename = report["filename"].format("_Summe")
            params = self.get_params(report, {})
            result.append(ReportRequest(report["id"], params, filename, report["format"]))

            key1 = report["params"][0]
            for k1, v1 in report["meta"]["optional"][key1].items():
                filename = report["filename"].format(v1)
                params = self.get_params(report, {key1: {k1: v1}})
                result.append(ReportRequest(report["id"], params, filename, report["format"]))
            return result
        if len(report["params"]) == 2:
            filename = report["filename"].format("_Summe", "").replace("_.", ".")
            params = self.get_params(report, {})
            result.append(ReportRequest(report["id"], params, filename, report["format"]))

            key1, key2 = report["params"]
            for k1, v1 in report["meta"]["optional"][key1].items():
                filename = report["filename"].format(v1, "_Summe")
                params = self.get_params(report, {key1: {k1: v1}})
                result.append(ReportRequest(report["id"], params, filename, report["format"]))

                for k2, v2 in report["meta"]["optional"][key2].items():
                    filename = report["filename"].format(v1, v2)
                    params = self.get_params(report, {key1: {k1: v1}, key2: {k2: v2}})
                    result.append(ReportRequest(report["id"], params, filename, report["format"]))
            return result

    def get_params(self, report, optional_params):
        params = report["meta"]["required"].copy()
        params.update(optional_params)
        return params

    def filter_request_plan(self, req_plan: list[list[ReportRequest]], mail_csv: str):
        if not Path(mail_csv).exists() or not Path(mail_csv).is_file():
            return req_plan
        required_files = []
        required_full_export = []
        with open(Path(mail_csv), "r", encoding="latin-1") as rfh:
            for row in rfh.readlines():
                filename, mailto = row.split(";")
                if "@" in mailto:
                    required_files.append(str(Path(self.cfg.cognos11.reportoutput_dir + '/' + filename).resolve()))
                    if "_Schichten." in filename:
                        filename2 = filename.replace("__Summe_und_Schichten", "__Summe").replace("__nur_Schichten", "__Summe")
                        required_full_export.append(str(Path(self.cfg.cognos11.reportoutput_dir + '/' + filename2).resolve()))
        res = []
        for req_group in req_plan:
            if len(req_group) > 0 and str(Path(req_group[0].filename).resolve()) in required_full_export:
                res.append(req_group)
            else:
                res.append([req for req in req_group if str(Path(req.filename).resolve()) in required_files])
        return res

    def execute_request_plan(self, req_plan: list[list[ReportRequest]]):
        for req_group in req_plan:
            for report_req in req_group:
                print(Path(report_req.filename).relative_to(self.cfg.cognos11.reportoutput_dir))
                self.request_and_save_file(report_req)

    def request_and_save_file(self, report_request: ReportRequest, save=True):
        logging.debug(report_request.filename)
        logging.debug(report_request.params)
        status_code, content = self.api.request_file(
            report_request.report_id,
            report_request.params,
            report_request.report_format,
        )
        if status_code != 200:
            return

        if not save:
            return
        os.makedirs(os.path.dirname(report_request.filename), exist_ok=True)
        try:
            with open(report_request.filename, "wb") as f:
                f.write(content)
        except PermissionError:
            print("--> not accessible!")

    def get_merge_group(self, req_plan: list[list[ReportRequest]]):
        res = {}
        for req_group in req_plan:
            if len(req_group) <= 1:
                continue
            files = [r.filename for r in req_group if r.report_format == "PDF"]
            filename = files[0].replace("_Summe", "_Summe_und_Schichten")
            res[filename] = files

            files2 = [r for r in files if "_Summe" not in r]
            filename2 = filename.replace("_Summe_und_Schichten", "_nur_Schichten")
            res[filename2] = files2
        return res

    def export_errors(self):
        reports = self.api.get_reports_in_folder("Team Content", recursive=True, specs=True)
        errors = [r for r in reports if "error" in r and not self.is_obsolete_or_ignored(r)]
        filename = self.cfg.cognos11.logs_dir + "/c11_report_errors.json"
        json.dump(errors, open(filename, "w"), indent=2)

    def template(self, req_plan: list[list[ReportRequest]], merge_group: dict[str, list[str]]):
        mail_groups = defaultdict(list)
        for report in merge_group.keys():
            filename = str(Path(report).relative_to(self.cfg.cognos11.reportoutput_dir))
            folder = Path(filename).parent.name
            mail_groups[folder].append(filename)

        for req_group in req_plan:
            for report in req_group:
                filename = str(Path(report.filename).relative_to(self.cfg.cognos11.reportoutput_dir))
                folder = Path(filename).parent.name
                mail_groups[folder].append(filename)
        for group, file_list in mail_groups.items():
            with open(
                self.cfg.cognos11.config_dir + f"/{group}.template.csv",
                "w",
                encoding="latin-1",
            ) as fwh:
                fwh.write("Datei;Empfaenger\n")
                for filename in file_list:
                    fwh.write(filename + ";\n")
        return True

    def mail_template(self, folder: str):
        current_dir = Path(self.cfg.cognos11.reportoutput_dir + "\\" + folder)

        subfolders = set([f.name for f in current_dir.glob("*") if f.is_dir()]).difference([".", "..", "leer"])

        folder2 = folder + "\\" if folder != "" else ""

        export_files = [f"{folder2}{f.name};" for f in current_dir.glob("*.*") if f.suffix in [".pdf", ".xls"]]

        if len(export_files) > 0:
            folder2 = folder.replace("\\", "_") if folder != "" else "Versand"
            template_file = Path(self.cfg.cognos11.config_dir + "\\" + folder2 + ".template.csv")
            print(template_file)
            with template_file.open("w") as fwh:
                fwh.write("Report;Empfaenger\n")
                fwh.write("\n".join(export_files))

        for f in subfolders:
            subfolder = folder + "\\" + f if folder != "" else f
            self.mail_template(subfolder)


if __name__ == "__main__":
    api = c11_api()
    api.login()
    pdf = c11_export(None, api)
    # pdf.export_folder('Team Content/Verkauf/1. Gesamtverkauf', 'PDF')
    # pdf.export_folder('Team Content/Aftersales/1. Service')
    pdf.export_errors()