/**
 * Math teaching resource tools
 */

import { Tool } from '@modelcontextprotocol/sdk/types.js';
import { mcpServer } from '../../server.js';
import { database, MathResource } from '../../storage/database.js';
import { randomUUID } from 'crypto';

export function registerMathTools(): void {
  // Search math resources
  mcpServer.registerTool(
    {
      name: 'math_resource_search',
      description: 'Search for math teaching resources (worksheets, problems, tools)',
      inputSchema: {
        type: 'object',
        properties: {
          query: {
            type: 'string',
            description: 'Search query',
          },
          grade: {
            type: 'string',
            description: 'Grade level (e.g., "1st", "2nd", "elementary", "middle", "high")',
          },
        },
        required: ['query'],
      },
    },
    async (args) => {
      const query = args.query as string;
      const grade = args.grade as string | undefined;

      const resources = database.searchMathResources(query, grade);

      if (resources.length === 0) {
        return {
          content: [
            {
              type: 'text',
              text: `No math resources found matching "${query}"${grade ? ` for grade ${grade}` : ''}.\n\nYou can save resources using math_resource_save tool.`,
            },
          ],
        };
      }

      const results = resources
        .map(
          (r) =>
            `Title: ${r.title}\nGrade: ${r.grade || 'N/A'}\nDifficulty: ${r.difficulty || 'N/A'}\nTags: ${r.tags.join(', ')}\n\nContent:\n${r.content}\n---`
        )
        .join('\n\n');

      return {
        content: [
          {
            type: 'text',
            text: `Found ${resources.length} math resource(s):\n\n${results}`,
          },
        ],
      };
    }
  );

  // Generate math problems
  mcpServer.registerTool(
    {
      name: 'math_problem_generate',
      description: 'Generate math problems by grade and difficulty',
      inputSchema: {
        type: 'object',
        properties: {
          grade: {
            type: 'string',
            description: 'Grade level (e.g., "1st", "2nd", "elementary", "middle", "high")',
          },
          difficulty: {
            type: 'string',
            description: 'Difficulty level (easy, medium, hard)',
            default: 'medium',
          },
          topic: {
            type: 'string',
            description: 'Math topic (e.g., "addition", "multiplication", "algebra", "geometry")',
          },
          count: {
            type: 'number',
            description: 'Number of problems to generate',
            default: 5,
          },
        },
        required: ['grade'],
      },
    },
    async (args) => {
      const grade = args.grade as string;
      const difficulty = (args.difficulty as string) || 'medium';
      const topic = args.topic as string | undefined;
      const count = (args.count as number) || 5;

      // Generate problems based on grade and difficulty
      const problems: string[] = [];

      if (grade.includes('1st') || grade.includes('2nd') || grade === 'elementary') {
        // Elementary level
        for (let i = 0; i < count; i++) {
          if (topic === 'addition' || !topic) {
            const a = Math.floor(Math.random() * 20) + 1;
            const b = Math.floor(Math.random() * 20) + 1;
            problems.push(`${a} + ${b} = ?`);
          } else if (topic === 'subtraction') {
            const a = Math.floor(Math.random() * 20) + 10;
            const b = Math.floor(Math.random() * a) + 1;
            problems.push(`${a} - ${b} = ?`);
          } else if (topic === 'multiplication') {
            const a = Math.floor(Math.random() * 10) + 1;
            const b = Math.floor(Math.random() * 10) + 1;
            problems.push(`${a} × ${b} = ?`);
          }
        }
      } else if (grade.includes('middle') || grade.includes('6th') || grade.includes('7th') || grade.includes('8th')) {
        // Middle school level
        for (let i = 0; i < count; i++) {
          if (topic === 'algebra' || !topic) {
            const a = Math.floor(Math.random() * 10) + 1;
            const b = Math.floor(Math.random() * 20) - 10;
            const c = Math.floor(Math.random() * 20) - 10;
            problems.push(`Solve for x: ${a}x + ${b} = ${c}`);
          } else if (topic === 'fractions') {
            const num1 = Math.floor(Math.random() * 10) + 1;
            const den1 = Math.floor(Math.random() * 10) + 1;
            const num2 = Math.floor(Math.random() * 10) + 1;
            const den2 = Math.floor(Math.random() * 10) + 1;
            problems.push(`Add: ${num1}/${den1} + ${num2}/${den2} = ?`);
          } else if (topic === 'geometry') {
            const side = Math.floor(Math.random() * 10) + 1;
            problems.push(`Find the area of a square with side length ${side}`);
          }
        }
      } else {
        // High school level
        for (let i = 0; i < count; i++) {
          if (topic === 'algebra' || !topic) {
            const a = Math.floor(Math.random() * 5) + 1;
            const b = Math.floor(Math.random() * 10) - 5;
            const c = Math.floor(Math.random() * 10) - 5;
            problems.push(`Solve: ${a}x² + ${b}x + ${c} = 0`);
          } else if (topic === 'geometry') {
            const r = Math.floor(Math.random() * 10) + 1;
            problems.push(`Find the area of a circle with radius ${r} (use π = 3.14)`);
          } else if (topic === 'trigonometry') {
            const angle = [30, 45, 60][Math.floor(Math.random() * 3)];
            problems.push(`Find sin(${angle}°)`);
          }
        }
      }

      const problemsText = problems.map((p, i) => `${i + 1}. ${p}`).join('\n');

      return {
        content: [
          {
            type: 'text',
            text: `Generated ${count} math problem(s) for ${grade} grade (${difficulty} difficulty)${topic ? ` - Topic: ${topic}` : ''}:\n\n${problemsText}`,
          },
        ],
      };
    }
  );

  // Save math resource
  mcpServer.registerTool(
    {
      name: 'math_resource_save',
      description: 'Save a math teaching resource',
      inputSchema: {
        type: 'object',
        properties: {
          title: {
            type: 'string',
            description: 'Title of the resource',
          },
          content: {
            type: 'string',
            description: 'Content of the resource (worksheet, problem set, etc.)',
          },
          grade: {
            type: 'string',
            description: 'Grade level',
          },
          difficulty: {
            type: 'string',
            description: 'Difficulty level',
          },
          tags: {
            type: 'array',
            items: { type: 'string' },
            description: 'Tags for categorization',
          },
          id: {
            type: 'string',
            description: 'Optional ID for updating existing resource',
          },
        },
        required: ['title', 'content'],
      },
    },
    async (args) => {
      const now = new Date().toISOString();
      const resource: MathResource = {
        id: (args.id as string) || randomUUID(),
        title: args.title as string,
        content: args.content as string,
        grade: args.grade as string | undefined,
        difficulty: args.difficulty as string | undefined,
        tags: (args.tags as string[]) || [],
        createdAt: now,
      };

      database.saveMathResource(resource);

      return {
        content: [
          {
            type: 'text',
            text: `Math resource "${resource.title}" saved successfully with ID: ${resource.id}`,
          },
        ],
      };
    }
  );
}