import type { ToolConfig } from './index'
import { useThemeStore } from '../../../stores/theme'

export function createThemeHandlers(): ToolConfig[] {
  return [
    {
      name: 'get_design_tokens',
      description: 'Obtiene los design tokens del tema activo',
      category: 'theme',
      schema: {
        type: 'object',
        properties: {
          category: {
            type: 'string',
            enum: ['all', 'colors', 'text', 'accent', 'semantic', 'spacing', 'typography', 'effects'],
            description: 'Categoria de tokens'
          }
        }
      },
      handler: async (args: { category?: string }) => {
        const themeStore = useThemeStore()
        const theme = themeStore.activeTheme

        if (!theme) {
          return 'No hay tema activo'
        }

        const category = args.category || 'all'
        const variables = theme.variables

        if (category !== 'all' && variables[category as keyof typeof variables]) {
          const categoryVars = variables[category as keyof typeof variables]
          const tokenList = Object.entries(categoryVars)
            .map(([name, value]) => `--${name}: ${value}`)
            .join('\n')
          return `Design Tokens - ${category.toUpperCase()}:\n\n${tokenList}`
        }

        const allTokens = Object.entries(variables)
          .map(([cat, vars]) => {
            const tokenList = Object.entries(vars as Record<string, string>)
              .map(([name, value]) => `  --${name}: ${value}`)
              .join('\n')
            return `[${cat.toUpperCase()}]\n${tokenList}`
          })
          .join('\n\n')

        return `Design Tokens del tema "${theme.name}":\n\n${allTokens}`
      }
    },
    {
      name: 'get_active_theme',
      description: 'Obtiene info del tema activo',
      category: 'theme',
      schema: { type: 'object', properties: {} },
      handler: () => {
        const themeStore = useThemeStore()
        const theme = themeStore.activeTheme

        if (!theme) return 'No hay tema activo'

        return `Tema activo: "${theme.name}"\n` +
          `ID: ${theme.id}\n` +
          `Sistema: ${theme.is_system ? 'Si' : 'No'}\n` +
          `Default: ${theme.is_default ? 'Si' : 'No'}`
      }
    },
    {
      name: 'set_theme_variable',
      description: 'Modifica una variable CSS del tema',
      category: 'theme',
      schema: {
        type: 'object',
        properties: {
          name: { type: 'string', description: 'Nombre de la variable sin --' },
          value: { type: 'string', description: 'Nuevo valor' }
        },
        required: ['name', 'value']
      },
      handler: (args: { name: string; value: string }) => {
        const themeStore = useThemeStore()
        const root = document.documentElement
        const varName = args.name.startsWith('--') ? args.name : `--${args.name}`
        const keyName = args.name.startsWith('--') ? args.name.slice(2) : args.name

        const currentValue = getComputedStyle(root).getPropertyValue(varName).trim()
        root.style.setProperty(varName, args.value)

        if (themeStore.activeTheme) {
          const variables = themeStore.activeTheme.variables
          for (const category of Object.keys(variables) as (keyof typeof variables)[]) {
            if (keyName in variables[category]) {
              themeStore.updateVariable(category, keyName, args.value)
              break
            }
          }
        }

        return `Variable ${varName} cambiada:\n  Anterior: ${currentValue || '(no definida)'}\n  Nuevo: ${args.value}`
      }
    },
    {
      name: 'save_theme',
      description: 'Guarda el tema actual',
      category: 'theme',
      schema: {
        type: 'object',
        properties: {
          name: { type: 'string', description: 'Nombre del tema' },
          description: { type: 'string', description: 'Descripcion' },
          setAsDefault: { type: 'boolean', description: 'Establecer como default' }
        },
        required: ['name']
      },
      handler: async (args: { name: string; description?: string; setAsDefault?: boolean }) => {
        const themeStore = useThemeStore()
        const variablesToSave = themeStore.previewTheme || themeStore.activeTheme?.variables

        if (!variablesToSave) {
          return 'Error: No hay variables para guardar'
        }

        const result = await themeStore.saveTheme({
          name: args.name,
          description: args.description || `Tema creado el ${new Date().toLocaleString()}`,
          variables: variablesToSave,
          metadata: { author: 'Claude', version: '1.0', base: themeStore.activeTheme?.id || null }
        })

        if (args.setAsDefault && result.id) {
          await themeStore.setDefaultTheme(result.id)
          return `Tema "${args.name}" guardado y establecido como default. ID: ${result.id}`
        }

        return `Tema "${args.name}" guardado. ID: ${result.id}`
      }
    },
    {
      name: 'list_themes',
      description: 'Lista todos los temas disponibles',
      category: 'theme',
      schema: { type: 'object', properties: {} },
      handler: async () => {
        const themeStore = useThemeStore()
        await themeStore.fetchThemes()

        const themes = themeStore.themes
        if (themes.length === 0) return 'No hay temas disponibles'

        const systemThemes = themes.filter(t => t.is_system)
        const userThemes = themes.filter(t => !t.is_system)

        let result = `Temas disponibles (${themes.length}):\n\n`

        if (systemThemes.length > 0) {
          result += `[SISTEMA]\n`
          result += systemThemes.map(t => `  - ${t.name}${t.is_default ? ' [DEFAULT]' : ''}`).join('\n')
          result += '\n\n'
        }

        if (userThemes.length > 0) {
          result += `[PERSONALIZADOS]\n`
          result += userThemes.map(t => `  - ${t.name}${t.is_default ? ' [DEFAULT]' : ''}`).join('\n')
        }

        return result
      }
    },
    {
      name: 'switch_theme',
      description: 'Cambia al tema especificado',
      category: 'theme',
      schema: {
        type: 'object',
        properties: {
          theme: { type: 'string', description: 'Nombre o ID del tema' }
        },
        required: ['theme']
      },
      handler: async (args: { theme: string }) => {
        const themeStore = useThemeStore()
        await themeStore.fetchThemes()

        const theme = themeStore.themes.find(t =>
          t.id === args.theme || t.name.toLowerCase() === args.theme.toLowerCase()
        )

        if (!theme) {
          return `Tema "${args.theme}" no encontrado`
        }

        themeStore.selectTheme(theme)
        return `Tema cambiado a "${theme.name}"`
      }
    },
    {
      name: 'reset_theme',
      description: 'Descarta cambios no guardados',
      category: 'theme',
      schema: { type: 'object', properties: {} },
      handler: () => {
        const themeStore = useThemeStore()
        if (!themeStore.previewTheme) {
          return 'No hay cambios pendientes'
        }
        themeStore.resetPreview()
        return 'Cambios descartados'
      }
    }
  ]
}