import React from "react";

import Link from "next/link";
import Image from "next/image";
import { useRouter } from "next/router";

import useSWR, { mutate } from "swr";

// services
import cyclesService from "services/cycles.service";
// hooks
import useToast from "hooks/use-toast";
// ui
import { LinearProgressIndicator, Tooltip } from "components/ui";
import { AssigneesList } from "components/ui/avatar";
import { SingleProgressStats } from "components/core";
// components
import ProgressChart from "components/core/sidebar/progress-chart";
import { ActiveCycleProgressStats } from "components/cycles";

// icons
import { CalendarDaysIcon } from "@heroicons/react/20/solid";
import { getPriorityIcon } from "components/icons/priority-icon";
import {
  TargetIcon,
  ContrastIcon,
  PersonRunningIcon,
  ArrowRightIcon,
  TriangleExclamationIcon,
  AlarmClockIcon,
  LayerDiagonalIcon,
  CompletedStateIcon,
} from "components/icons";
import { StarIcon } from "@heroicons/react/24/outline";
// helpers
import {
  getDateRangeStatus,
  renderShortDateWithYearFormat,
  findHowManyDaysLeft,
} from "helpers/date-time.helper";
import { truncateText } from "helpers/string.helper";
// types
import {
  CompletedCyclesResponse,
  CurrentAndUpcomingCyclesResponse,
  DraftCyclesResponse,
  ICycle,
  IIssue,
} from "types";
// fetch-keys
import {
  CYCLE_COMPLETE_LIST,
  CYCLE_CURRENT_AND_UPCOMING_LIST,
  CYCLE_DRAFT_LIST,
  CYCLE_ISSUES,
} from "constants/fetch-keys";

type TSingleStatProps = {
  cycle: ICycle;
  isCompleted?: boolean;
};

const stateGroups = [
  {
    key: "backlog_issues",
    title: "Backlog",
    color: "#dee2e6",
  },
  {
    key: "unstarted_issues",
    title: "Unstarted",
    color: "#26b5ce",
  },
  {
    key: "started_issues",
    title: "Started",
    color: "#f7ae59",
  },
  {
    key: "cancelled_issues",
    title: "Cancelled",
    color: "#d687ff",
  },
  {
    key: "completed_issues",
    title: "Completed",
    color: "#09a953",
  },
];

export const ActiveCycleDetails: React.FC<TSingleStatProps> = ({ cycle, isCompleted = false }) => {
  const router = useRouter();
  const { workspaceSlug, projectId } = router.query;

  const { setToastAlert } = useToast();

  const endDate = new Date(cycle.end_date ?? "");
  const startDate = new Date(cycle.start_date ?? "");

  const groupedIssues: any = {
    backlog: cycle.backlog_issues,
    unstarted: cycle.unstarted_issues,
    started: cycle.started_issues,
    completed: cycle.completed_issues,
    cancelled: cycle.cancelled_issues,
  };

  const cycleStatus = getDateRangeStatus(cycle.start_date, cycle.end_date);

  const handleAddToFavorites = () => {
    if (!workspaceSlug || !projectId || !cycle) return;

    switch (cycleStatus) {
      case "current":
      case "upcoming":
        mutate<CurrentAndUpcomingCyclesResponse>(
          CYCLE_CURRENT_AND_UPCOMING_LIST(projectId as string),
          (prevData) => ({
            current_cycle: (prevData?.current_cycle ?? []).map((c) => ({
              ...c,
              is_favorite: c.id === cycle.id ? true : c.is_favorite,
            })),
            upcoming_cycle: (prevData?.upcoming_cycle ?? []).map((c) => ({
              ...c,
              is_favorite: c.id === cycle.id ? true : c.is_favorite,
            })),
          }),
          false
        );
        break;
      case "completed":
        mutate<CompletedCyclesResponse>(
          CYCLE_COMPLETE_LIST(projectId as string),
          (prevData) => ({
            completed_cycles: (prevData?.completed_cycles ?? []).map((c) => ({
              ...c,
              is_favorite: c.id === cycle.id ? true : c.is_favorite,
            })),
          }),
          false
        );
        break;
      case "draft":
        mutate<DraftCyclesResponse>(
          CYCLE_DRAFT_LIST(projectId as string),
          (prevData) => ({
            draft_cycles: (prevData?.draft_cycles ?? []).map((c) => ({
              ...c,
              is_favorite: c.id === cycle.id ? true : c.is_favorite,
            })),
          }),
          false
        );
        break;
    }

    cyclesService
      .addCycleToFavorites(workspaceSlug as string, projectId as string, {
        cycle: cycle.id,
      })
      .catch(() => {
        setToastAlert({
          type: "error",
          title: "Error!",
          message: "Couldn't add the cycle to favorites. Please try again.",
        });
      });
  };

  const handleRemoveFromFavorites = () => {
    if (!workspaceSlug || !projectId || !cycle) return;

    switch (cycleStatus) {
      case "current":
      case "upcoming":
        mutate<CurrentAndUpcomingCyclesResponse>(
          CYCLE_CURRENT_AND_UPCOMING_LIST(projectId as string),
          (prevData) => ({
            current_cycle: (prevData?.current_cycle ?? []).map((c) => ({
              ...c,
              is_favorite: c.id === cycle.id ? false : c.is_favorite,
            })),
            upcoming_cycle: (prevData?.upcoming_cycle ?? []).map((c) => ({
              ...c,
              is_favorite: c.id === cycle.id ? false : c.is_favorite,
            })),
          }),
          false
        );
        break;
      case "completed":
        mutate<CompletedCyclesResponse>(
          CYCLE_COMPLETE_LIST(projectId as string),
          (prevData) => ({
            completed_cycles: (prevData?.completed_cycles ?? []).map((c) => ({
              ...c,
              is_favorite: c.id === cycle.id ? false : c.is_favorite,
            })),
          }),
          false
        );
        break;
      case "draft":
        mutate<DraftCyclesResponse>(
          CYCLE_DRAFT_LIST(projectId as string),
          (prevData) => ({
            draft_cycles: (prevData?.draft_cycles ?? []).map((c) => ({
              ...c,
              is_favorite: c.id === cycle.id ? false : c.is_favorite,
            })),
          }),
          false
        );
        break;
    }

    cyclesService
      .removeCycleFromFavorites(workspaceSlug as string, projectId as string, cycle.id)
      .catch(() => {
        setToastAlert({
          type: "error",
          title: "Error!",
          message: "Couldn't remove the cycle from favorites. Please try again.",
        });
      });
  };

  const { data: issues } = useSWR<IIssue[]>(
    workspaceSlug && projectId && cycle.id ? CYCLE_ISSUES(cycle.id as string) : null,
    workspaceSlug && projectId && cycle.id
      ? () =>
          cyclesService.getCycleIssues(
            workspaceSlug as string,
            projectId as string,
            cycle.id as string
          )
      : null
  );

  const progressIndicatorData = stateGroups.map((group, index) => ({
    id: index,
    name: group.title,
    value:
      cycle.total_issues > 0
        ? ((cycle[group.key as keyof ICycle] as number) / cycle.total_issues) * 100
        : 0,
    color: group.color,
  }));

  return (
    <div className="grid-row-2 grid rounded-[10px] shadow divide-y bg-brand-base border border-brand-base">
      <div className="grid grid-cols-1 divide-y border-brand-base lg:divide-y-0 lg:divide-x lg:grid-cols-3">
        <div className="flex flex-col text-xs">
          <a className="w-full">
            <div className="flex h-full flex-col gap-5 rounded-b-[10px] p-4">
              <div className="flex items-center justify-between gap-1">
                <span className="flex items-center gap-1">
                  <ContrastIcon
                    className="h-5 w-5"
                    color={`${
                      cycleStatus === "current"
                        ? "#09A953"
                        : cycleStatus === "upcoming"
                        ? "#F7AE59"
                        : cycleStatus === "completed"
                        ? "#3F76FF"
                        : cycleStatus === "draft"
                        ? "#858E96"
                        : ""
                    }`}
                  />
                  <Tooltip tooltipContent={cycle.name} position="top-left">
                    <h3 className="break-all text-lg font-semibold">
                      {truncateText(cycle.name, 70)}
                    </h3>
                  </Tooltip>
                </span>
                <span className="flex items-center gap-1 capitalize">
                  <span
                    className={`rounded-full px-1.5 py-0.5
                    ${
                      cycleStatus === "current"
                        ? "bg-green-600/5 text-green-600"
                        : cycleStatus === "upcoming"
                        ? "bg-orange-300/5 text-orange-300"
                        : cycleStatus === "completed"
                        ? "bg-blue-500/5 text-blue-500"
                        : cycleStatus === "draft"
                        ? "bg-neutral-400/5 text-neutral-400"
                        : ""
                    }`}
                  >
                    {cycleStatus === "current" ? (
                      <span className="flex gap-1">
                        <PersonRunningIcon className="h-4 w-4" />
                        {findHowManyDaysLeft(cycle.end_date ?? new Date())} Days Left
                      </span>
                    ) : cycleStatus === "upcoming" ? (
                      <span className="flex gap-1">
                        <AlarmClockIcon className="h-4 w-4" />
                        {findHowManyDaysLeft(cycle.start_date ?? new Date())} Days Left
                      </span>
                    ) : cycleStatus === "completed" ? (
                      <span className="flex gap-1">
                        {cycle.total_issues - cycle.completed_issues > 0 && (
                          <Tooltip
                            tooltipContent={`${
                              cycle.total_issues - cycle.completed_issues
                            } more pending ${
                              cycle.total_issues - cycle.completed_issues === 1 ? "issue" : "issues"
                            }`}
                          >
                            <span>
                              <TriangleExclamationIcon className="h-3.5 w-3.5 fill-current" />
                            </span>
                          </Tooltip>
                        )}{" "}
                        Completed
                      </span>
                    ) : (
                      cycleStatus
                    )}
                  </span>
                  {cycle.is_favorite ? (
                    <button
                      onClick={(e) => {
                        e.preventDefault();
                        handleRemoveFromFavorites();
                      }}
                    >
                      <StarIcon className="h-4 w-4 text-orange-400" fill="#f6ad55" />
                    </button>
                  ) : (
                    <button
                      onClick={(e) => {
                        e.preventDefault();
                        handleAddToFavorites();
                      }}
                    >
                      <StarIcon className="h-4 w-4 " color="#858E96" />
                    </button>
                  )}
                </span>
              </div>

              <div className="flex items-center justify-start gap-5 text-brand-secondary">
                <div className="flex items-start gap-1">
                  <CalendarDaysIcon className="h-4 w-4" />
                  <span>{renderShortDateWithYearFormat(startDate)}</span>
                </div>
                <ArrowRightIcon className="h-4 w-4 text-brand-secondary" />
                <div className="flex items-start gap-1">
                  <TargetIcon className="h-4 w-4" />
                  <span>{renderShortDateWithYearFormat(endDate)}</span>
                </div>
              </div>

              <div className="flex items-center gap-4">
                <div className="flex items-center gap-2.5 text-brand-secondary">
                  {cycle.owned_by.avatar && cycle.owned_by.avatar !== "" ? (
                    <Image
                      src={cycle.owned_by.avatar}
                      height={16}
                      width={16}
                      className="rounded-full"
                      alt={cycle.owned_by.first_name}
                    />
                  ) : (
                    <span className="bg-brand-secondary flex h-5 w-5 items-center justify-center rounded-full bg-brand-base  capitalize">
                      {cycle.owned_by.first_name.charAt(0)}
                    </span>
                  )}
                  <span className="text-brand-secondary">{cycle.owned_by.first_name}</span>
                </div>

                {cycle.assignees.length > 0 && (
                  <div className="flex items-center gap-1 text-brand-secondary">
                    <AssigneesList users={cycle.assignees} length={4} />
                  </div>
                )}
              </div>

              <div className="flex items-center gap-4 text-brand-secondary">
                <div className="flex gap-2">
                  <LayerDiagonalIcon className="h-4 w-4 flex-shrink-0" />
                  {cycle.total_issues} issues
                </div>
                <div className="flex gap-2">
                  <CompletedStateIcon width={16} height={16} color="#438AF3" />
                  {cycle.completed_issues} issues
                </div>
              </div>

              <Link href={`/${workspaceSlug}/projects/${projectId}/cycles/${cycle.id}`}>
                <a className="bg-brand-accent text-white px-4 rounded-md py-2 text-center text-sm font-medium w-full hover:bg-brand-accent/90">
                  View Cycle
                </a>
              </Link>
            </div>
          </a>
        </div>
        <div className="grid col-span-2 grid-cols-1 divide-y border-brand-base md:divide-y-0 md:divide-x md:grid-cols-2">
          <div className="flex h-full flex-col border-brand-base">
            <div className="flex h-full w-full flex-col text-brand-secondary p-4">
              <div className="flex w-full items-center gap-2 py-1">
                <span>Progress</span>
                <LinearProgressIndicator data={progressIndicatorData} />
              </div>
              <div className="flex flex-col mt-2 gap-1 items-center">
                {Object.keys(groupedIssues).map((group, index) => (
                  <SingleProgressStats
                    key={index}
                    title={
                      <div className="flex items-center gap-2">
                        <span
                          className="block h-3 w-3 rounded-full "
                          style={{
                            backgroundColor: stateGroups[index].color,
                          }}
                        />
                        <span className="text-xs capitalize">{group}</span>
                      </div>
                    }
                    completed={groupedIssues[group]}
                    total={cycle.total_issues}
                  />
                ))}
              </div>
            </div>
          </div>
          <div className="border-brand-base p-4">
            <ActiveCycleProgressStats issues={issues ?? []} />
          </div>
        </div>
      </div>
      <div className="grid grid-cols-1 divide-y border-brand-base lg:divide-y-0 lg:divide-x lg:grid-cols-2">
        <div className="flex flex-col justify-between p-4">
          <div>
            <div className="text-brand-primary mb-2">High Priority Issues</div>

            <div className="mb-2 flex max-h-[240px] min-h-[240px] flex-col gap-2.5 overflow-y-scroll rounded-md">
              {issues
                ?.filter((issue) => issue.priority === "urgent" || issue.priority === "high")
                .map((issue) => (
                  <div
                    key={issue.id}
                    className="flex flex-wrap rounded-md items-center justify-between gap-2 border border-brand-base bg-brand-surface-1 px-3 py-1.5"
                  >
                    <div className="flex flex-col gap-1">
                      <div>
                        <Tooltip
                          tooltipHeading="Issue ID"
                          tooltipContent={`${issue.project_detail?.identifier}-${issue.sequence_id}`}
                        >
                          <span className="flex-shrink-0 text-xs text-brand-secondary">
                            {issue.project_detail?.identifier}-{issue.sequence_id}
                          </span>
                        </Tooltip>
                      </div>
                      <Tooltip
                        position="top-left"
                        tooltipHeading="Title"
                        tooltipContent={issue.name}
                      >
                        <span className="text-[0.825rem] text-brand-base">
                          {truncateText(issue.name, 30)}
                        </span>
                      </Tooltip>
                    </div>

                    <div className="flex items-center gap-1.5">
                      <div
                        className={`grid h-6 w-6 place-items-center items-center rounded border shadow-sm ${
                          issue.priority === "urgent"
                            ? "border-red-500/20 bg-red-500/20 text-red-500"
                            : issue.priority === "high"
                            ? "border-orange-500/20 bg-orange-500/20 text-orange-500"
                            : issue.priority === "medium"
                            ? "border-yellow-500/20 bg-yellow-500/20 text-yellow-500"
                            : issue.priority === "low"
                            ? "border-green-500/20 bg-green-500/20 text-green-500"
                            : "border-brand-base"
                        }`}
                      >
                        {getPriorityIcon(issue.priority, "text-sm")}
                      </div>
                      {issue.label_details.length > 0 ? (
                        <div className="flex flex-wrap gap-1">
                          {issue.label_details.map((label) => (
                            <span
                              key={label.id}
                              className="group flex items-center gap-1 rounded-2xl border border-brand-base px-2 py-0.5 text-xs text-brand-secondary"
                            >
                              <span
                                className="h-1.5 w-1.5  rounded-full"
                                style={{
                                  backgroundColor:
                                    label?.color && label.color !== "" ? label.color : "#000",
                                }}
                              />
                              {label.name}
                            </span>
                          ))}
                        </div>
                      ) : (
                        ""
                      )}
                      <div className={`flex items-center gap-2 text-brand-secondary`}>
                        {issue.assignees &&
                        issue.assignees.length > 0 &&
                        Array.isArray(issue.assignees) ? (
                          <div className="-my-0.5 flex items-center justify-center gap-2">
                            <AssigneesList
                              userIds={issue.assignees}
                              length={3}
                              showLength={false}
                            />
                          </div>
                        ) : (
                          ""
                        )}
                      </div>
                    </div>
                  </div>
                ))}
            </div>
          </div>

          <div className="flex items-center justify-between gap-2">
            <div className="h-1 w-full rounded-full bg-brand-surface-2">
              <div
                className="h-1 rounded-full bg-green-600"
                style={{
                  width:
                    issues &&
                    `${
                      (issues?.filter(
                        (issue) =>
                          issue?.state_detail?.group === "completed" &&
                          (issue?.priority === "urgent" || issue?.priority === "high")
                      )?.length /
                        issues?.filter(
                          (issue) => issue?.priority === "urgent" || issue?.priority === "high"
                        )?.length) *
                        100 ?? 0
                    }%`,
                }}
              />
            </div>
            <div className="w-16 text-end text-xs text-brand-secondary">
              {
                issues?.filter(
                  (issue) =>
                    issue?.state_detail?.group === "completed" &&
                    (issue?.priority === "urgent" || issue?.priority === "high")
                )?.length
              }{" "}
              of{" "}
              {
                issues?.filter(
                  (issue) => issue?.priority === "urgent" || issue?.priority === "high"
                )?.length
              }
            </div>
          </div>
        </div>
        <div className="flex flex-col justify-between border-brand-base p-4">
          <div className="flex items-start justify-between gap-4 py-1.5 text-xs">
            <div className="flex items-center gap-3 text-brand-base">
              <div className="flex items-center justify-center gap-1">
                <span className="h-2.5 w-2.5 rounded-full bg-[#A9BBD0]" />
                <span>Ideal</span>
              </div>
              <div className="flex items-center justify-center gap-1">
                <span className="h-2.5 w-2.5 rounded-full bg-[#4C8FFF]" />
                <span>Current</span>
              </div>
            </div>
            <div className="flex items-center gap-1">
              <span>
                <LayerDiagonalIcon className="h-5 w-5 flex-shrink-0 text-brand-secondary" />
              </span>
              <span>
                Pending Issues -{" "}
                {cycle.total_issues - (cycle.completed_issues + cycle.cancelled_issues)}
              </span>
            </div>
          </div>
          <div className="relative h-64">
            <ProgressChart
              issues={issues ?? []}
              start={cycle?.start_date ?? ""}
              end={cycle?.end_date ?? ""}
              width={475}
              height={256}
            />
          </div>
        </div>
      </div>
    </div>
  );
};