import type { FastifyInstance } from "fastify";
import { SuggestionService } from "../../services/suggestion.service";
import { AuditService } from "../../services/audit.service";
import { AchievementService } from "../../services/achievement.service";
import { AuditAction, AuditCategory, AchievementCategory } from "@library/shared-types";
import type {
  SuggestionStatus,
  SuggestionEntity,
  CreateSuggestionDto,
  DeclineSuggestionDto,
  AcceptWithEditsDto,
} from "@library/shared-types";
import { adminGuard } from "../../middleware/admin-guard";
import { bannedGuard } from "../../middleware/banned-guard";

export default async function (app: FastifyInstance): Promise<void> {
  // Get all suggestions (admin only)
  app.get<{
    Querystring: { status?: SuggestionStatus; entityType?: SuggestionEntity };
  }>(
    "/",
    {
      preHandler: [app.authenticate, adminGuard],
    },
    async (request, reply) => {
      const { status, entityType } = request.query;

      const suggestions = await SuggestionService.getAllSuggestions({
        status,
        entityType,
      });

      reply.send(suggestions);
    }
  );

  // Get current user's suggestions
  app.get(
    "/my",
    {
      preHandler: [app.authenticate],
    },
    async (request, reply) => {
      const userId = request.user.id;
      const suggestions = await SuggestionService.getUserSuggestions(userId);
      reply.send(suggestions);
    }
  );

  // Get a single suggestion by ID
  app.get<{ Params: { id: string } }>(
    "/:id",
    {
      preHandler: [app.authenticate],
    },
    async (request, reply) => {
      const { id } = request.params;
      const suggestion = await SuggestionService.getSuggestionById(id);

      if (!suggestion) {
        return reply.notFound("Suggestion not found");
      }

      // Non-admins can only view their own suggestions
      if (!request.user.isAdmin && suggestion.userId !== request.user.id) {
        return reply.forbidden("You can only view your own suggestions");
      }

      reply.send(suggestion);
    }
  );

  // Create a new suggestion (any authenticated non-banned user)
  app.post<{ Body: CreateSuggestionDto }>(
    "/",
    {
      preHandler: [app.authenticate, bannedGuard, app.csrfProtection],
    },
    async (request, reply) => {
      const userId = request.user.id;

      try {
        const suggestion = await SuggestionService.createSuggestion(
          userId,
          request.body
        );

        await AuditService.logFromRequest(request, {
          action: AuditAction.entryCreate,
          category: AuditCategory.content,
          resourceType: "Suggestion",
          resourceId: suggestion.id,
          details: `Created ${suggestion.entityType} suggestion: ${suggestion.title}`,
          success: true,
        });

        // Check for suggestion achievements
        const achievementService = new AchievementService();
        await achievementService.checkAchievements(
          userId,
          AchievementCategory.Suggestion,
          request
        );

        reply.send(suggestion);
      } catch (error) {
        return reply.badRequest(
          error instanceof Error ? error.message : "Failed to create suggestion"
        );
      }
    }
  );

  // Accept a suggestion (admin only)
  app.put<{ Params: { id: string } }>(
    "/:id/accept",
    {
      preHandler: [app.authenticate, adminGuard, app.csrfProtection],
    },
    async (request, reply) => {
      const { id } = request.params;

      try {
        const suggestion = await SuggestionService.acceptSuggestion(id);

        await AuditService.logFromRequest(request, {
          action: AuditAction.entryUpdate,
          category: AuditCategory.admin,
          resourceType: "Suggestion",
          resourceId: suggestion.id,
          details: `Accepted ${suggestion.entityType} suggestion: ${suggestion.title}`,
          success: true,
        });

        // Check for suggestion achievements for the user who made the suggestion
        const achievementService = new AchievementService();
        await achievementService.checkAchievements(
          suggestion.userId,
          AchievementCategory.Suggestion,
          request
        );

        reply.send(suggestion);
      } catch (error) {
        return reply.badRequest(
          error instanceof Error ? error.message : "Failed to accept suggestion"
        );
      }
    }
  );

  // Accept a suggestion with edits (admin only)
  app.put<{ Params: { id: string }; Body: AcceptWithEditsDto }>(
    "/:id/accept-with-edits",
    {
      preHandler: [app.authenticate, adminGuard, app.csrfProtection],
    },
    async (request, reply) => {
      const { id } = request.params;
      const editedData = request.body;

      try {
        const suggestion = await SuggestionService.acceptSuggestionWithEdits(id, editedData);

        await AuditService.logFromRequest(request, {
          action: AuditAction.entryUpdate,
          category: AuditCategory.admin,
          resourceType: "Suggestion",
          resourceId: suggestion.id,
          details: `Accepted ${suggestion.entityType} suggestion with edits: ${suggestion.title}`,
          success: true,
        });

        // Check for suggestion achievements for the user who made the suggestion
        const achievementService = new AchievementService();
        await achievementService.checkAchievements(
          suggestion.userId,
          AchievementCategory.Suggestion,
          request
        );

        reply.send(suggestion);
      } catch (error) {
        return reply.badRequest(
          error instanceof Error ? error.message : "Failed to accept suggestion with edits"
        );
      }
    }
  );

  // Decline a suggestion (admin only)
  app.put<{ Params: { id: string }; Body: DeclineSuggestionDto }>(
    "/:id/decline",
    {
      preHandler: [app.authenticate, adminGuard, app.csrfProtection],
    },
    async (request, reply) => {
      const { id } = request.params;
      const { reason } = request.body;

      try {
        const suggestion = await SuggestionService.declineSuggestion(id, reason);

        await AuditService.logFromRequest(request, {
          action: AuditAction.entryUpdate,
          category: AuditCategory.admin,
          resourceType: "Suggestion",
          resourceId: suggestion.id,
          details: `Declined ${suggestion.entityType} suggestion: ${suggestion.title}${reason ? ` (Reason: ${reason})` : ""}`,
          success: true,
        });

        reply.send(suggestion);
      } catch (error) {
        return reply.badRequest(
          error instanceof Error ? error.message : "Failed to decline suggestion"
        );
      }
    }
  );

  // Delete a suggestion (owner or admin only, only if unreviewed)
  app.delete<{ Params: { id: string } }>(
    "/:id",
    {
      preHandler: [app.authenticate, app.csrfProtection],
    },
    async (request, reply) => {
      const { id } = request.params;
      const userId = request.user.id;
      const isAdmin = request.user.isAdmin;

      try {
        const suggestion = await SuggestionService.deleteSuggestion(id, userId, isAdmin);

        await AuditService.logFromRequest(request, {
          action: AuditAction.entryDelete,
          category: isAdmin ? AuditCategory.admin : AuditCategory.content,
          resourceType: "Suggestion",
          resourceId: suggestion.id,
          details: `Deleted ${suggestion.entityType} suggestion: ${suggestion.title}`,
          success: true,
        });

        reply.send({ success: true });
      } catch (error) {
        return reply.badRequest(
          error instanceof Error ? error.message : "Failed to delete suggestion"
        );
      }
    }
  );
}
