import {
  AgentMode,
  ALL_AGENT_MODES,
  DEFAULT_AGENT_MODE,
  AGENT_MODE_CONFIGS,
  getAgentModeLabel,
  modeRequiresPreview,
  getSystemPromptForMode,
  filterToolsForMode,
} from '../src/agent-modes';
import { OllamaTool } from '../src/types';

describe('Agent Modes', () => {
  const allTools: OllamaTool[] = [
    {
      type: 'function',
      function: {
        name: 'read_vault_file',
        description: 'Read',
        parameters: { type: 'object', properties: {} },
      },
    },
    {
      type: 'function',
      function: {
        name: 'search_vault_files',
        description: 'Search',
        parameters: { type: 'object', properties: {} },
      },
    },
    {
      type: 'function',
      function: {
        name: 'create_note',
        description: 'Create',
        parameters: { type: 'object', properties: {} },
      },
    },
    {
      type: 'function',
      function: {
        name: 'update_frontmatter',
        description: 'Update frontmatter',
        parameters: { type: 'object', properties: {} },
      },
    },
    {
      type: 'function',
      function: {
        name: 'delete_note',
        description: 'Delete',
        parameters: { type: 'object', properties: {} },
      },
    },
  ];

  describe('constants', () => {
    it('should define all expected modes', () => {
      expect(ALL_AGENT_MODES).toEqual(['ask', 'edit', 'organize', 'research', 'workflow']);
    });

    it('should have default mode ask', () => {
      expect(DEFAULT_AGENT_MODE).toBe('ask');
    });
  });

  describe('getAgentModeLabel', () => {
    it('should return labels for known modes', () => {
      expect(getAgentModeLabel('ask')).toBe('Ask');
      expect(getAgentModeLabel('edit')).toBe('Edit');
      expect(getAgentModeLabel('organize')).toBe('Organize');
      expect(getAgentModeLabel('research')).toBe('Research');
      expect(getAgentModeLabel('workflow')).toBe('Workflow');
    });

    it('should fallback to raw mode name for unknown modes', () => {
      expect(getAgentModeLabel('unknown' as AgentMode)).toBe('unknown');
    });
  });

  describe('modeRequiresPreview', () => {
    it('should require preview for edit and organize', () => {
      expect(modeRequiresPreview('edit')).toBe(true);
      expect(modeRequiresPreview('organize')).toBe(true);
    });

    it('should not require preview for ask, research, workflow', () => {
      expect(modeRequiresPreview('ask')).toBe(false);
      expect(modeRequiresPreview('research')).toBe(false);
      expect(modeRequiresPreview('workflow')).toBe(false);
    });
  });

  describe('getSystemPromptForMode', () => {
    it('should return a non-empty prompt for each mode', () => {
      for (const mode of ALL_AGENT_MODES) {
        const prompt = getSystemPromptForMode(mode);
        expect(typeof prompt).toBe('string');
        expect(prompt.length).toBeGreaterThan(0);
      }
    });

    it('should fallback to ask prompt for unknown mode', () => {
      const askPrompt = getSystemPromptForMode('ask');
      const fallback = getSystemPromptForMode('unknown' as AgentMode);
      expect(fallback).toBe(askPrompt);
    });
  });

  describe('filterToolsForMode', () => {
    it('ask mode should only allow read/search tools', () => {
      const filtered = filterToolsForMode(allTools, 'ask');
      const names = filtered.map((t) => t.function.name);
      expect(names).toContain('read_vault_file');
      expect(names).toContain('search_vault_files');
      expect(names).not.toContain('create_note');
      expect(names).not.toContain('delete_note');
    });

    it('edit mode should allow all tools', () => {
      const filtered = filterToolsForMode(allTools, 'edit');
      const names = filtered.map((t) => t.function.name);
      expect(names).toContain('read_vault_file');
      expect(names).toContain('create_note');
      expect(names).toContain('delete_note');
    });

    it('organize mode should allow organize tools but not delete', () => {
      const filtered = filterToolsForMode(allTools, 'organize');
      const names = filtered.map((t) => t.function.name);
      expect(names).toContain('read_vault_file');
      expect(names).toContain('search_vault_files');
      expect(names).toContain('update_frontmatter');
      expect(names).not.toContain('delete_note');
      expect(names).not.toContain('create_note');
    });

    it('research mode should only allow read/search tools', () => {
      const filtered = filterToolsForMode(allTools, 'research');
      const names = filtered.map((t) => t.function.name);
      expect(names).toContain('read_vault_file');
      expect(names).toContain('search_vault_files');
      expect(names).not.toContain('create_note');
    });

    it('workflow mode should return no tools', () => {
      const filtered = filterToolsForMode(allTools, 'workflow');
      expect(filtered).toHaveLength(0);
    });

    it('unknown mode should return all tools', () => {
      const filtered = filterToolsForMode(allTools, 'unknown' as AgentMode);
      expect(filtered).toEqual(allTools);
    });
  });

  describe('AGENT_MODE_CONFIGS', () => {
    it('should have a config for every mode', () => {
      for (const mode of ALL_AGENT_MODES) {
        expect(AGENT_MODE_CONFIGS[mode]).toBeDefined();
        expect(AGENT_MODE_CONFIGS[mode].label).toBeDefined();
        expect(AGENT_MODE_CONFIGS[mode].description).toBeDefined();
        expect(AGENT_MODE_CONFIGS[mode].systemPrompt).toBeDefined();
      }
    });
  });
});