#!/usr/bin/env node

/**
 * Brainy CLI
 * A command-line interface for interacting with the Brainy vector database
 */

import { BrainyData, NounType, VerbType, FileSystemStorage } from './index.js'
import { fileURLToPath } from 'url'
import { dirname, join } from 'path'
import fs from 'fs'
import { Command } from 'commander'
import omelette from 'omelette'

// Get the directory of the current module
const __filename = fileURLToPath(import.meta.url)
const __dirname = dirname(__filename)

// Import package.json for version info
const packageJson = {
  name: '@soulcraft/brainy',
  version: '0.6.0',
  description: 'A vector database using HNSW indexing with Origin Private File System storage'
}

// Helper function to parse JSON safely
function parseJSON(str: string): any {
  try {
    return JSON.parse(str)
  } catch (e) {
    console.error('Error parsing JSON:', (e as Error).message)
    return {}
  }
}

// Helper function to resolve noun type
function resolveNounType(type: string | number | undefined): NounType {
  if (!type) return NounType.Thing

  // If it's a string, try to match it to a NounType
  if (typeof type === 'string') {
    const nounTypeKey = Object.keys(NounType).find(
      key => key.toLowerCase() === type.toLowerCase()
    )
    return nounTypeKey ? NounType[nounTypeKey as keyof typeof NounType] : NounType.Thing
  }

  // Convert number to string type for safety
  return Object.values(NounType)[type as number] || NounType.Thing
}

// Helper function to resolve verb type
function resolveVerbType(type: string | number | undefined): VerbType {
  if (!type) return VerbType.RelatedTo

  // If it's a string, try to match it to a VerbType
  if (typeof type === 'string') {
    const verbTypeKey = Object.keys(VerbType).find(
      key => key.toLowerCase() === type.toLowerCase()
    )
    return verbTypeKey ? VerbType[verbTypeKey as keyof typeof VerbType] : VerbType.RelatedTo
  }

  // Convert number to string type for safety
  return Object.values(VerbType)[type as number] || VerbType.RelatedTo
}

// Create a new Command instance
const program = new Command()

// Configure the program
program
  .name(packageJson.name)
  .description(packageJson.description)
  .version(packageJson.version)

// Create data directory if it doesn't exist
const dataDir = join(__dirname, '..', 'data')
if (!fs.existsSync(dataDir)) {
  fs.mkdirSync(dataDir, { recursive: true })
}

// Create a database instance with file system storage
const createDb = () => {
  return new BrainyData({
    storageAdapter: new FileSystemStorage(dataDir)
  })
}

// Define commands
program
  .command('init')
  .description('Initialize a new database')
  .action(async () => {
    try {
      const db = createDb()
      await db.init()
      console.log('Database initialized successfully')
    } catch (error) {
      console.error('Error:', (error as Error).message)
      process.exit(1)
    }
  })

program
  .command('add')
  .description('Add a new noun with the given text and optional metadata')
  .argument('<text>', 'Text to add as a noun')
  .argument('[metadata]', 'Optional metadata as JSON string')
  .action(async (text, metadataStr) => {
    try {
      const db = createDb()
      await db.init()

      const metadata = metadataStr ? parseJSON(metadataStr) : {}

      // Process metadata to handle noun type
      if (metadata.noun) {
        metadata.noun = resolveNounType(metadata.noun)
      }

      const id = await db.add(text, metadata)
      console.log(`Added noun with ID: ${id}`)
    } catch (error) {
      console.error('Error:', (error as Error).message)
      process.exit(1)
    }
  })

program
  .command('search')
  .description('Search for nouns similar to the query')
  .argument('<query>', 'Search query text')
  .option('-l, --limit <number>', 'Maximum number of results to return', '5')
  .action(async (query, options) => {
    try {
      const db = createDb()
      await db.init()

      const limit = parseInt(options.limit, 10)
      const results = await db.searchText(query, limit)

      console.log(`Search results for "${query}":`)
      results.forEach((result, index) => {
        console.log(`${index + 1}. ID: ${result.id}`)
        console.log(`   Score: ${result.score.toFixed(4)}`)
        console.log(`   Metadata: ${JSON.stringify(result.metadata)}`)
        console.log(`   Vector: [${result.vector.slice(0, 3).map(v => v.toFixed(2)).join(', ')}...]`)
        console.log()
      })
    } catch (error) {
      console.error('Error:', (error as Error).message)
      process.exit(1)
    }
  })

program
  .command('get')
  .description('Get a noun by ID')
  .argument('<id>', 'ID of the noun to get')
  .action(async (id) => {
    try {
      const db = createDb()
      await db.init()

      const noun = await db.get(id)
      if (noun) {
        console.log(`Noun ID: ${noun.id}`)
        console.log(`Metadata: ${JSON.stringify(noun.metadata)}`)
        console.log(`Vector: [${noun.vector.slice(0, 5).map(v => v.toFixed(2)).join(', ')}...]`)
      } else {
        console.log(`No noun found with ID: ${id}`)
      }
    } catch (error) {
      console.error('Error:', (error as Error).message)
      process.exit(1)
    }
  })

program
  .command('delete')
  .description('Delete a noun by ID')
  .argument('<id>', 'ID of the noun to delete')
  .action(async (id) => {
    try {
      const db = createDb()
      await db.init()

      await db.delete(id)
      console.log(`Deleted noun with ID: ${id}`)
    } catch (error) {
      console.error('Error:', (error as Error).message)
      process.exit(1)
    }
  })

program
  .command('addVerb')
  .description('Add a relationship between nouns')
  .argument('<sourceId>', 'ID of the source noun')
  .argument('<targetId>', 'ID of the target noun')
  .argument('<verbType>', 'Type of relationship')
  .argument('[metadata]', 'Optional metadata as JSON string')
  .action(async (sourceId, targetId, verbTypeStr, metadataStr) => {
    try {
      const db = createDb()
      await db.init()

      const verbType = resolveVerbType(verbTypeStr)
      const verbMetadata = metadataStr ? parseJSON(metadataStr) : {}

      // Add verb type to metadata
      verbMetadata.verb = verbType

      const verbId = await db.addVerb(sourceId, targetId, undefined, {
        type: verbType,
        metadata: verbMetadata
      })
      console.log(`Added verb with ID: ${verbId}`)
    } catch (error) {
      console.error('Error:', (error as Error).message)
      process.exit(1)
    }
  })

program
  .command('getVerbs')
  .description('Get all relationships for a noun')
  .argument('<id>', 'ID of the noun to get relationships for')
  .action(async (id) => {
    try {
      const db = createDb()
      await db.init()

      const verbs = await db.getVerbsBySource(id)

      console.log(`Relationships for noun ${id}:`)
      if (verbs.length === 0) {
        console.log('No relationships found')
      } else {
        verbs.forEach((verb, index) => {
          console.log(`${index + 1}. ID: ${verb.id}`)
          console.log(`   Type: ${Object.keys(VerbType).find(key => VerbType[key as keyof typeof VerbType] === verb.metadata.verb) || verb.metadata.verb}`)
          console.log(`   Target: ${verb.targetId}`)
          console.log(`   Metadata: ${JSON.stringify(verb.metadata)}`)
          console.log()
        })
      }
    } catch (error) {
      console.error('Error:', (error as Error).message)
      process.exit(1)
    }
  })

program
  .command('status')
  .description('Show database status')
  .action(async () => {
    try {
      const db = createDb()
      await db.init()

      const status = await db.status()
      console.log('Database Status:')
      console.log(`Storage type: ${status.type}`)
      console.log(`Storage used: ${status.used} bytes`)
      console.log(`Storage quota: ${status.quota !== null ? `${status.quota} bytes` : 'unlimited'}`)

      // Display additional details if available
      if (status.details) {
        console.log('Additional details:')
        Object.entries(status.details).forEach(([key, value]) => {
          console.log(`  ${key}: ${JSON.stringify(value)}`)
        })
      }
    } catch (error) {
      console.error('Error:', (error as Error).message)
      process.exit(1)
    }
  })

// Add examples to help text
program.addHelpText('after', `
Examples:
  $ brainy init
  $ brainy add "Cats are independent pets" '{"noun":"Thing","category":"animal"}'
  $ brainy search "feline pets" --limit 5
  $ brainy addVerb id1 id2 RelatedTo '{"description":"Both are pets"}'
`)

// Setup autocomplete
const completion = omelette('brainy')

// Helper function to get all noun types
const getNounTypes = () => Object.keys(NounType)

// Helper function to get all verb types
const getVerbTypes = () => Object.keys(VerbType)

// Define autocomplete handlers
completion.tree({
  // First level commands - suggest all available commands
  _: () => [
    'add',
    'addVerb',
    'search',
    'get',
    'delete',
    'getVerbs',
    'status',
    'completion-setup',
    'init',
    'help'
  ],
  // Command-specific completions
  add: {
    // For the second argument of 'add' command (metadata)
    _: () => {
      // Generate templates for each noun type
      return getNounTypes().map(type => 
        `{"noun":"${type}","category":"example"}`
      )
    }
  },
  addVerb: {
    // First two arguments are IDs, third is verb type
    '<sourceId>': {
      '<targetId>': {
        _: () => {
          // Suggest all available verb types
          return getVerbTypes()
        }
      }
    }
  },
  // Add autocomplete for other commands
  search: {},
  get: {},
  delete: {},
  getVerbs: {},
  status: {},
  'completion-setup': {},
  init: {},
  help: {}
})

// Initialize autocomplete
completion.init()

// If this script is run with --completion-setup flag, set up the autocomplete
if (process.argv.includes('--completion-setup')) {
  completion.setupShellInitFile()
  console.log('Autocomplete setup complete. Please restart your shell.')
  process.exit(0)
}

// Add a command for setting up autocomplete
program
  .command('completion-setup')
  .description('Setup shell autocomplete for the Brainy CLI')
  .action(() => {
    completion.setupShellInitFile()
    console.log('Autocomplete setup complete. Please restart your shell.')
  })

// Parse command line arguments
program.parse()