import { useValidatedParams, z, zh } from 'h3-zod';
import prisma from '~~/lib/prisma';

export default defineEventHandler(async (event) => {
  const { huntId } = await useValidatedParams(
    event,
    z.object({
      huntId: zh.numAsString
    })
  );

  const user = await getUserSession(event);
  const userId = user.user?.id || 0;

  // TODO: use one request for this logic
  const exists = await prisma.hunt.findUnique({
    where: {
      id: huntId,
      deletedAt: null
    },
    select: { id: true }
  });

  if (!exists) {
    throw createError({ status: 404, statusText: 'Not found!' });
  }

  const _hunt = await prisma.hunt.findUnique({
    where: {
      id: huntId,
      deletedAt: null,
      OR: [
        {
          revealAnswers: true,
          revealQuests: true
        },
        {
          creatorId: userId
        },
        {
          members: {
            some: {
              memberId: userId
            }
          }
        }
      ]
    },
    select: {
      id: true,
      name_de: true,
      name_en: true,
      start: true,
      end: true,

      _count: {
        select: {
          teams: true,
          members: true,
          quests: true
        }
      },

      teams: {
        select: {
          _count: {
            select: {
              members: true,
              answers: {
                where: {
                  review: {
                    score: { gt: 0 }
                  }
                }
              }
            }
          },
          id: true,
          name: true,
          description: true,
          answers: {
            select: {
              review: {
                select: {
                  score: true
                }
              }
            },
            where: {
              review: {
                score: { not: null }
              }
            }
          }
        }
      },

      quests: {
        select: {
          id: true,
          title_de: true,
          title_en: true,
          description_de: true,
          description_en: true,
          textSolution: true,
          points: true,
          extraPoints: true,

          answers: {
            select: {
              id: true,
              text: true,
              review: {
                select: {
                  score: true
                }
              },

              picture: {
                select: {
                  url: true,
                  createdAt: true,
                  creator: {
                    select: {
                      id: true,
                      name: true
                    }
                  }
                }
              },
              team: {
                select: {
                  id: true,
                  name: true
                }
              }
            },
            where: {
              review: {
                showcase: true
              },
              picture: { private: false }
            },
            orderBy: [
              {
                review: {
                  rankingValue: { sort: 'asc', nulls: 'last' }
                }
              },
              {
                review: {
                  score: { sort: 'asc', nulls: 'last' }
                }
              },
              { createdAt: 'asc' }
            ]
          }
        },
        where: {
          OR: [
            {
              answers: {
                some: {
                  review: {
                    showcase: true
                  }
                }
              }
            }
            // TODO: showcase solutions to quests
            // {
            //   textSolution: { not: null }
            // }
          ]
        }
      }
    }
  });

  if (!_hunt) {
    throw createError({
      status: 403,
      statusText: 'Answers are not revealed yet!'
    });
  }

  const { teams, ...hunt } = _hunt;

  const userCount = teams.reduce(
    (sum, team) => sum + team._count.members + 1,
    0
  );

  const leaderboard = teams
    .map(({ name, id, description, answers, _count }) => ({
      name,
      id,
      description,
      answers: _count.answers,
      score: answers.reduce((sum, a) => sum + (a.review?.score || 0), 0)
    }))
    .toSorted((a, b) => b.score - a.score);

  const totalScore = leaderboard.reduce((sum, team) => sum + team.score, 0);

  const pictureCount = await prisma.file.count({
    where: {
      answer: {
        quest: {
          huntId
        }
      }
    }
  });

  return {
    userCount,
    pictureCount,
    totalScore,
    leaderboard,
    ...hunt,
    quests: hunt.quests.filter((q) => q.answers.length > 0)
  };
});