import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import { apiFetch } from '@/lib/tauri'
import type { ProjectCanvas, CanvasComponent, ComponentUsage } from '../types/canvas'

// Uses relative URLs - works with Vite proxy in dev and Traefik in production
const API_URL = ''

export const useProjectCanvasStore = defineStore('projectCanvas', () => {
  // State
  const canvases = ref<ProjectCanvas[]>([])
  const activeCanvas = ref<ProjectCanvas | null>(null)
  const activeCanvasComponents = ref<CanvasComponent[]>([])
  const loading = ref(false)
  const saving = ref(false)
  const error = ref<string | null>(null)

  // State adicional
  const toolbarCanvases = ref<ProjectCanvas[]>([])
  const defaultCanvas = ref<ProjectCanvas | null>(null)

  // Getters
  const projectCanvases = computed(() =>
    canvases.value.filter(c => c.type === 'project')
  )

  const systemCanvases = computed(() =>
    canvases.value.filter(c => c.type === 'system')
  )

  const dynamicCanvas = computed(() =>
    canvases.value.find(c => c.type === 'dynamic')
  )

  const activeCanvasesList = computed(() =>
    canvases.value.filter(c => c.status !== 'archived')
  )

  const archivedCanvases = computed(() =>
    canvases.value.filter(c => c.status === 'archived')
  )

  const canvasCount = computed(() => canvases.value.length)

  const hasActiveCanvas = computed(() => activeCanvas.value !== null)

  const hasDefaultCanvas = computed(() => defaultCanvas.value !== null)

  // Actions
  async function fetchCanvases(includeArchived = false) {
    loading.value = true
    error.value = null
    try {
      const url = includeArchived ? `${API_URL}/api/canvas?include_archived=true` : `${API_URL}/api/canvas`
      const res = await apiFetch(url)
      if (!res.ok) throw new Error('Failed to fetch canvases')
      canvases.value = await res.json()
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'Unknown error'
      console.error('Error fetching canvases:', e)
    } finally {
      loading.value = false
    }
  }

  async function fetchToolbarCanvases() {
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/toolbar`)
      if (!res.ok) throw new Error('Failed to fetch toolbar canvases')
      toolbarCanvases.value = await res.json()
    } catch (e) {
      console.error('Error fetching toolbar canvases:', e)
      toolbarCanvases.value = []
    }
  }

  async function fetchDefaultCanvas(): Promise<ProjectCanvas | null> {
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/default`)
      if (!res.ok) throw new Error('Failed to fetch default canvas')
      const data = await res.json()
      if (data.hasDefault) {
        defaultCanvas.value = data.canvas
        return data.canvas
      }
      defaultCanvas.value = null
      return null
    } catch (e) {
      console.error('Error fetching default canvas:', e)
      defaultCanvas.value = null
      return null
    }
  }

  async function fetchCanvasById(id: string): Promise<ProjectCanvas | null> {
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/${id}`)
      if (!res.ok) {
        if (res.status === 404) return null
        throw new Error('Failed to fetch canvas')
      }
      return await res.json()
    } catch (e) {
      console.error('Error fetching canvas:', e)
      return null
    }
  }

  async function createCanvas(data: Partial<ProjectCanvas>): Promise<string | null> {
    saving.value = true
    error.value = null
    try {
      const res = await apiFetch(`${API_URL}/api/canvas`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(data)
      })
      if (!res.ok) throw new Error('Failed to create canvas')
      const result = await res.json()
      await fetchCanvases()
      return result.id
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'Unknown error'
      console.error('Error creating canvas:', e)
      return null
    } finally {
      saving.value = false
    }
  }

  async function updateCanvas(id: string, data: Partial<ProjectCanvas>): Promise<boolean> {
    saving.value = true
    error.value = null
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/${id}`, {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(data)
      })
      if (!res.ok) {
        const errorData = await res.json()
        throw new Error(errorData.error || 'Failed to update canvas')
      }
      await fetchCanvases()
      // Update active canvas if it's the one being updated
      if (activeCanvas.value?.id === id) {
        activeCanvas.value = await fetchCanvasById(id)
      }
      return true
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'Unknown error'
      console.error('Error updating canvas:', e)
      return false
    } finally {
      saving.value = false
    }
  }

  async function deleteCanvas(id: string): Promise<boolean> {
    error.value = null
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/${id}`, {
        method: 'DELETE'
      })
      if (!res.ok) {
        const errorData = await res.json()
        throw new Error(errorData.error || 'Failed to delete canvas')
      }
      await fetchCanvases()
      if (activeCanvas.value?.id === id) {
        clearActiveCanvas()
      }
      return true
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'Unknown error'
      console.error('Error deleting canvas:', e)
      return false
    }
  }

  async function restoreCanvas(id: string): Promise<boolean> {
    return updateCanvas(id, { status: 'active' } as any)
  }

  async function cloneCanvas(id: string, newName?: string): Promise<string | null> {
    saving.value = true
    error.value = null
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/${id}/clone`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ name: newName })
      })
      if (!res.ok) throw new Error('Failed to clone canvas')
      const result = await res.json()
      await fetchCanvases()
      return result.id
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'Unknown error'
      console.error('Error cloning canvas:', e)
      return null
    } finally {
      saving.value = false
    }
  }

  // Canvas Components
  async function fetchCanvasComponents(canvasId: string) {
    loading.value = true
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/${canvasId}/components`)
      if (!res.ok) throw new Error('Failed to fetch canvas components')
      activeCanvasComponents.value = await res.json()
    } catch (e) {
      console.error('Error fetching canvas components:', e)
      activeCanvasComponents.value = []
    } finally {
      loading.value = false
    }
  }

  async function addComponentToCanvas(
    canvasId: string,
    componentId: string,
    props?: Record<string, any>,
    position?: number
  ): Promise<boolean> {
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/${canvasId}/components`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ component_id: componentId, props, position })
      })
      if (!res.ok) throw new Error('Failed to add component to canvas')
      await fetchCanvasComponents(canvasId)
      return true
    } catch (e) {
      console.error('Error adding component to canvas:', e)
      return false
    }
  }

  async function removeComponentFromCanvas(canvasId: string, componentId: string): Promise<boolean> {
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/${canvasId}/components/${componentId}`, {
        method: 'DELETE'
      })
      if (!res.ok) throw new Error('Failed to remove component from canvas')
      await fetchCanvasComponents(canvasId)
      return true
    } catch (e) {
      console.error('Error removing component from canvas:', e)
      return false
    }
  }

  async function updateCanvasComponent(
    canvasId: string,
    componentId: string,
    data: { position?: number; props?: Record<string, any>; layout?: any; is_visible?: boolean }
  ): Promise<boolean> {
    try {
      const res = await apiFetch(`${API_URL}/api/canvas/${canvasId}/components/${componentId}`, {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(data)
      })
      if (!res.ok) throw new Error('Failed to update canvas component')
      await fetchCanvasComponents(canvasId)
      return true
    } catch (e) {
      console.error('Error updating canvas component:', e)
      return false
    }
  }

  // Component Usage
  async function getComponentUsage(componentId: string): Promise<ComponentUsage | null> {
    try {
      const res = await apiFetch(`${API_URL}/api/components/${componentId}/usage`)
      if (!res.ok) throw new Error('Failed to get component usage')
      return await res.json()
    } catch (e) {
      console.error('Error getting component usage:', e)
      return null
    }
  }

  // Canvas Activation
  function setActiveCanvas(canvas: ProjectCanvas) {
    activeCanvas.value = canvas
  }

  function clearActiveCanvas() {
    activeCanvas.value = null
    activeCanvasComponents.value = []
  }

  async function activateCanvas(id: string): Promise<boolean> {
    const canvas = await fetchCanvasById(id)
    if (!canvas) return false
    setActiveCanvas(canvas)
    await fetchCanvasComponents(id)
    return true
  }

  return {
    // State
    canvases,
    activeCanvas,
    activeCanvasComponents,
    toolbarCanvases,
    defaultCanvas,
    loading,
    saving,
    error,
    // Getters
    projectCanvases,
    systemCanvases,
    dynamicCanvas,
    activeCanvasesList,
    archivedCanvases,
    canvasCount,
    hasActiveCanvas,
    hasDefaultCanvas,
    // Actions
    fetchCanvases,
    fetchToolbarCanvases,
    fetchDefaultCanvas,
    fetchCanvasById,
    createCanvas,
    updateCanvas,
    deleteCanvas,
    restoreCanvas,
    cloneCanvas,
    fetchCanvasComponents,
    addComponentToCanvas,
    removeComponentFromCanvas,
    updateCanvasComponent,
    getComponentUsage,
    setActiveCanvas,
    clearActiveCanvas,
    activateCanvas
  }
})