import {
  Box,
  Breadcrumb,
  BreadcrumbItem,
  BreadcrumbLink,
  Container,
} from '@chakra-ui/react';
import { GlobalHeader } from '../../components/global-header';
import { OpensourceBanner } from '../../components/opensource-banner';
import { UpdatesBanner } from '../../components/updates-banner';
import { Footer } from '../../components/footer';
import { getAllRoadmaps, getRoadmapById, RoadmapType } from '../../lib/roadmap';
import MdRenderer from '../../components/md-renderer';
import Helmet from '../../components/helmet';
import React from 'react';
import { ChevronRightIcon } from '@chakra-ui/icons';

type RoadmapProps = {
  roadmap: RoadmapType;
  group: string;
};

// @todo error handling
function TextualRoadmap(props: RoadmapProps) {
  const { roadmap, group } = props;
  if (!roadmap.contentPathsFilePath) {
    return null;
  }

  // Remove trailing slashes
  const contentsPathsFilePath = roadmap.contentPathsFilePath.replace(/^\//, '');
  const contentPathMapping = require(`../../content/${contentsPathsFilePath}`);

  const contentFilePath = contentPathMapping[group] || '';
  const normalizedContentFilePath = contentFilePath.replace(/^\//, '');

  const GroupContent =
    require(`../../content/${normalizedContentFilePath}`).default;
  const groupParts = group.split(':');

  return (
    <Container maxW={'container.md'} position="relative">
      <Box d="block" m="60px 0 20px">
        <Breadcrumb
          fontWeight="medium"
          fontSize="sm"
          separator={<ChevronRightIcon color="gray.500" />}
        >
          <BreadcrumbItem>
            <BreadcrumbLink color="blue.500" href={`/${roadmap.id}`}>
              {roadmap.featuredTitle}
            </BreadcrumbLink>
          </BreadcrumbItem>

          {groupParts.map((groupPart: string, counter: number) => (
            <BreadcrumbItem key={groupPart} isCurrentPage={counter === groupParts.length - 1}>
              <BreadcrumbLink
                color="blue.500"
                href={`/${roadmap.id}/${groupParts
                  .slice(0, counter + 1)
                  .join(':')}`}
              >
                {groupPart.split('-').join(' ')}
              </BreadcrumbLink>
            </BreadcrumbItem>
          ))}
        </Breadcrumb>
      </Box>
      <MdRenderer>
        <GroupContent />
      </MdRenderer>
    </Container>
  );
}

export default function Roadmap(props: RoadmapProps) {
  const { roadmap, group } = props;

  return (
    <Box bg="white" minH="100vh">
      <GlobalHeader />
      <Helmet
        title={roadmap?.seo?.title || roadmap.title}
        description={roadmap?.seo?.description || roadmap.description}
        keywords={roadmap?.seo.keywords || []}
      />
      <Box mb="60px">
        <TextualRoadmap roadmap={roadmap} group={group} />
      </Box>

      <OpensourceBanner />
      <UpdatesBanner />
      <Footer />
    </Box>
  );
}

type StaticPathItem = {
  params: {
    roadmap: string;
    group: string;
  };
};

export async function getStaticPaths() {
  const roadmaps = getAllRoadmaps();

  // Return all the groups from here
  const paramsList: StaticPathItem[] = roadmaps.flatMap((roadmap) => {
    if (roadmap.contentPathsFilePath) {
      const normalizedPath = roadmap.contentPathsFilePath.replace(/^\/+?/, '');
      const contentPaths = require(`../../content/${normalizedPath}`);
      const groupNames = Object.keys(contentPaths);

      // For each of the group names, return the param list
      return groupNames.map((groupName: string) => ({
        params: {
          roadmap: roadmap.id,
          group: groupName,
        },
      }));
    }

    return {
      params: {
        roadmap: roadmap.id,
        group: roadmap.id,
      },
    };
  });

  return {
    paths: paramsList,
    fallback: false,
  };
}

type ContextType = {
  params: {
    roadmap: string;
    group: string;
  };
};

export async function getStaticProps(context: ContextType) {
  const roadmapId: string = context?.params?.roadmap;
  const groupId: string = context?.params?.group;

  return {
    props: {
      roadmap: getRoadmapById(roadmapId),
      group: groupId,
    },
  };
}