import { defineStore } from "pinia";
import { ref, computed } from "vue";
import { invoke } from "@tauri-apps/api/core";

export interface ImageItem {
  path: string;
  thumbnail?: string; 
  name: string;
  width?: number;
  height?: number;
  zcaSuggestion?: { x: number; y: number; zone: string };
}

export interface WatermarkSettings {
    type: 'text'; // Fixed to text
    text: string;
    color: string; // Hex
    opacity: number; // 0-1
    scale: number; // 0.01 - 0.5 (relative to image height)
    manual_override: boolean;
    manual_position: { x: number, y: number };
}

export const useGalleryStore = defineStore("gallery", () => {
  const images = ref<ImageItem[]>([]);
  const selectedIndex = ref<number>(-1);
  const watermarkSettings = ref<WatermarkSettings>({
      type: 'text',
      text: 'Watermark',
      color: '#FFFFFF',
      opacity: 0.8,
      scale: 0.05, // 5% of height default
      manual_override: false,
      manual_position: { x: 0.5, y: 0.9 }
  });

  const selectedImage = computed(() => {
    if (selectedIndex.value >= 0 && selectedIndex.value < images.value.length) {
      return images.value[selectedIndex.value];
    }
    return null;
  });

  function setImages(newImages: ImageItem[]) {
    images.value = newImages;
    selectedIndex.value = -1;
  }
  
  function updateWatermarkSettings(settings: Partial<WatermarkSettings>) {
      watermarkSettings.value = { ...watermarkSettings.value, ...settings };
  }

  async function selectImage(index: number) {
    if (index < 0 || index >= images.value.length) return;
    selectedIndex.value = index;

    const img = images.value[index];
    if (!img.zcaSuggestion) {
        try {
            const suggestion = await invoke<{x: number, y: number, zone: string}>("get_zca_suggestion", { path: img.path });
            img.zcaSuggestion = suggestion;
        } catch (e) {
            console.error("ZCA failed", e);
        }
    }
  }

  return {
    images,
    selectedIndex,
    selectedImage,
    watermarkSettings,
    setImages,
    selectImage,
    updateWatermarkSettings
  };
});