import { and, eq, isNull, sql } from "drizzle-orm";
import { Hono } from "hono";
import { z } from "zod";
import db from "../../drizzle";
import { assessments } from "../../drizzle/schema/assessments";
import { respondents } from "../../drizzle/schema/respondents";
import { users } from "../../drizzle/schema/users";
import { aspects } from "../../drizzle/schema/aspects"; // Import schema aspek
import { subAspects } from "../../drizzle/schema/subAspects"; // Import schema subAspek
import { questions } from "../../drizzle/schema/questions"; // Import schema question
import { options } from "../../drizzle/schema/options";
import { answers } from "../../drizzle/schema/answers";
import { answerRevisions } from "../../drizzle/schema/answerRevisions";
import HonoEnv from "../../types/HonoEnv";
import authInfo from "../../middlewares/authInfo";
import checkPermission from "../../middlewares/checkPermission";
import requestValidator from "../../utils/requestValidator";
import { notFound } from "../../errors/DashboardError";

const assessmentRoute = new Hono<HonoEnv>()
  .use(authInfo)

  // Get All List of Assessment Results
  .get(
    "/",
    checkPermission("assessmentResult.readAll"),
    requestValidator(
      "query",
      z.object({
        page: z.coerce.number().int().min(0).default(0),
        limit: z.coerce.number().int().min(1).max(1000).default(40),
      })
    ),
    async (c) => {
      const { page, limit } = c.req.valid("query");

      const result = await db
        .select({
          id: assessments.id,
          respondentName: users.name, // Mengambil `name` langsung dari tabel `users`
          companyName: respondents.companyName,
          statusAssessments: assessments.status,
          statusVerification: sql<string>`
            CASE
              WHEN ${assessments.validatedAt} IS NOT NULL THEN 'sudah diverifikasi'
              ELSE 'belum diverifikasi'
            END`
          .as("statusVerification"),
          assessmentsResult: sql<number>`
            (SELECT ROUND(AVG(${options.score}), 2)
              FROM ${answers}
              JOIN ${options} ON ${options.id} = ${answers.optionId}
              JOIN ${questions} ON ${questions.id} = ${options.questionId}
              JOIN ${subAspects} ON ${subAspects.id} = ${questions.subAspectId}
              JOIN ${aspects} ON ${aspects.id} = ${subAspects.aspectId}
              WHERE ${answers.assessmentId} = ${assessments.id})`
          .as("assessmentsResult"),
        })
        .from(assessments)
        .leftJoin(respondents, eq(assessments.respondentId, respondents.id))
        .leftJoin(users, eq(respondents.userId, users.id))  // Menghubungkan `respondents` dengan `users` melalui `userId`
        .offset(page * limit)
        .limit(limit);

      const totalItems = await db
        .select({
          count: sql<number>`COUNT(*)`,
        })
        .from(assessments);

      return c.json({
        data: result,
        _metadata: {
          currentPage: page,
          totalPages: Math.ceil(totalItems[0].count / limit),
          totalItems: totalItems[0].count,
          perPage: limit,
        },
      });
    }
  )

  // Get Assessment Result by ID
  .get(
    "/:id",
    checkPermission("assessmentResult.read"),
    async (c) => {
      const assessmentId = c.req.param("id");

      const result = await db
        .select({
          respondentName: users.name,           // Nama Responden
          position: respondents.position,       // Jabatan
          workExperience: respondents.workExperience, // Pengalaman Kerja
          email: users.email,                   // Email
          companyName: respondents.companyName, // Instansi/Perusahaan
          address: respondents.address,         // Alamat
          phoneNumber: respondents.phoneNumber, // Nomor Telepon
          username: users.username,             // Username
          assessmentDate: assessments.createdAt, // Tanggal Asesmen
          statusAssessment: assessments.status, // Status Asesmen
          assessmentsResult: sql<number>`
            (SELECT ROUND(AVG(${options.score}), 2)
              FROM ${answers}
              JOIN ${options} ON ${options.id} = ${answers.optionId}
              JOIN ${questions} ON ${questions.id} = ${options.questionId}
              JOIN ${subAspects} ON ${subAspects.id} = ${questions.subAspectId}
              JOIN ${aspects} ON ${aspects.id} = ${subAspects.aspectId}
              WHERE ${answers.assessmentId} = ${assessments.id})`
          .as("assessmentsResult"),
        })
        .from(assessments)
        .leftJoin(respondents, eq(assessments.respondentId, respondents.id))
        .leftJoin(users, eq(respondents.userId, users.id))
        .where(eq(assessments.id, assessmentId));

      if (!result.length) {
        throw notFound({
          message: "Assessment not found",
        });
      }

      return c.json(result[0]);
    }
  )

  // Get all Questions and Options that relate to Sub Aspects and Aspects based on Assessment ID
  .get(
    "getAllQuestion/:id",
    checkPermission("assessmentResult.readAllQuestions"),
    async (c) => {
      const assessmentId = c.req.param("id");

      if (!assessmentId) {
        throw notFound({
          message: "Assessment ID is missing",
        });
      }
  
      // Total count of options related to the assessment
      const totalCountQuery = sql<number>`
        SELECT count(*)
        FROM ${options}
        LEFT JOIN ${questions} ON ${options.questionId} = ${questions.id}
        LEFT JOIN ${subAspects} ON ${questions.subAspectId} = ${subAspects.id}
        LEFT JOIN ${aspects} ON ${subAspects.aspectId} = ${aspects.id}
        LEFT JOIN ${answers} ON ${options.id} = ${answers.optionId}
        WHERE ${questions.deletedAt} IS NULL
        AND ${answers.assessmentId} = ${assessmentId}
      `;
  
      // Query to get detailed information about options
      const result = await db
        .select({
          optionId: options.id,
          aspectsId: aspects.id,
          aspectsName: aspects.name,
          subAspectId: subAspects.id,
          subAspectName: subAspects.name,
          questionId: questions.id,
          questionText: questions.question,
          answerId: answers.id,
          answerText: options.text,
          answerScore: options.score,
        })
        .from(options)
        .leftJoin(questions, eq(options.questionId, questions.id))
        .leftJoin(subAspects, eq(questions.subAspectId, subAspects.id))
        .leftJoin(aspects, eq(subAspects.aspectId, aspects.id))
        .leftJoin(answers, eq(options.id, answers.optionId))
        .where(sql`${questions.deletedAt} IS NULL AND ${answers.assessmentId} = ${assessmentId}`);
  
      // Execute the total count query
      const totalCountResult = await db.execute(totalCountQuery);

      if (result.length === 0) {
        throw notFound({
          message: "Data does not exist",
        });
      }
  
      return c.json({
        data: result,
        totalCount: totalCountResult[0]?.count || 0
      });
    }
  )
  
  // POST Endpoint for creating a new answer revision
  .post(
    "/answer-revisions",
    checkPermission("assessmentResult.create"),
    requestValidator(
      "json",
      z.object({
        answerId: z.string(),
        newOptionId: z.string(),
        revisedBy: z.string(),
        newValidationInformation: z.string(),
      })
    ),
    async (c) => {
      const { answerId, newOptionId, revisedBy, newValidationInformation } = c.req.valid("json");

      // Check if the answer exists
      const existingAnswer = await db
        .select()
        .from(answers)
        .where(eq(answers.id, answerId));
      
      if (!existingAnswer.length) {
        throw notFound({
          message: "Answer not found",
        });
      }

      // Insert new revision
      const [newRevision] = await db
        .insert(answerRevisions)
        .values({
          answerId,
          newOptionId,
          revisedBy,
          newValidationInformation
        })
        .returning();

      return c.json(
        {
          message: "Answer revision created successfully",
          data: newRevision
        },
        201
      );
    }
  );

export default assessmentRoute;