const sequelize = require('../database/database.js');
const { Project, Img, Ann } = require('../models');
const { fetchLableStudioProject, fetchProjectIdsAndTitles } = require('./fetch-labelstudio.js');

const updateStatus = { running: false };

async function seedLabelStudio() {
  updateStatus.running = true;
  console.log('Seeding started');
  try {
    await sequelize.sync();
    const projects = await fetchProjectIdsAndTitles();

    for (const project of projects) {
      console.log(`Processing project ${project.id} (${project.title})`);

      // Upsert project in DB
      await Project.upsert({ project_id: project.id, title: project.title });

      // Fetch project data (annotations array)
      const data = await fetchLableStudioProject(project.id);
      if (!Array.isArray(data) || data.length === 0) {
        console.log(`No annotation data for project ${project.id}`);
        continue;
      }

      // Remove old images and annotations for this project
      const oldImages = await Img.findAll({ where: { project_id: project.id } });
      const oldImageIds = oldImages.map(img => img.image_id);
      if (oldImageIds.length > 0) {
        await Ann.destroy({ where: { image_id: oldImageIds } });
        await Img.destroy({ where: { project_id: project.id } });
        console.log(`Deleted ${oldImageIds.length} old images and their annotations for project ${project.id}`);
      }

      // Prepare arrays
      const imagesBulk = [];
      const annsBulk = [];

      for (const ann of data) {
        // Extract width/height
        let width = null;
        let height = null;
        if (Array.isArray(ann.label_rectangles) && ann.label_rectangles.length > 0) {
          width = ann.label_rectangles[0].original_width;
          height = ann.label_rectangles[0].original_height;
        } else if (Array.isArray(ann.label) && ann.label.length > 0 && ann.label[0].original_width && ann.label[0].original_height) {
          width = ann.label[0].original_width;
          height = ann.label[0].original_height;
        }

        // Only push image and annotations if width and height are valid
        if (width && height) {
          imagesBulk.push({
            project_id: project.id,
            image_path: ann.image,
            width,
            height
          });

          // Handle multiple annotations per image
          if (Array.isArray(ann.label_rectangles)) {
            for (const ann_detail of ann.label_rectangles) {
              annsBulk.push({
                image_path: ann.image,
                x: (ann_detail.x * width) / 100,
                y: (ann_detail.y * height) / 100,
                width: (ann_detail.width * width) / 100,
                height: (ann_detail.height * height) / 100,
                Label: Array.isArray(ann_detail.rectanglelabels) ? (ann_detail.rectanglelabels[0] || 'unknown') : (ann_detail.rectanglelabels || 'unknown')
              });
            }
          } else if (Array.isArray(ann.label)) {
            for (const ann_detail of ann.label) {
              annsBulk.push({
                image_path: ann.image,
                x: (ann_detail.x * width) / 100,
                y: (ann_detail.y * height) / 100,
                width: (ann_detail.width * width) / 100,
                height: (ann_detail.height * height) / 100,
                Label: Array.isArray(ann_detail.rectanglelabels) ? (ann_detail.rectanglelabels[0] || 'unknown') : (ann_detail.rectanglelabels || 'unknown')
              });
            }
          }
        }
      }

      // 1) Insert images and get generated IDs
      const insertedImages = await Img.bulkCreate(imagesBulk, { returning: true });

      // 2) Map image_path -> image_id
      const imageMap = {};
      for (const img of insertedImages) {
        imageMap[img.image_path] = img.image_id;
      }

      // 3) Assign correct image_id to each annotation
      for (const ann of annsBulk) {
        ann.image_id = imageMap[ann.image_path];
        delete ann.image_path; // cleanup
      }

      // 4) Insert annotations
      await Ann.bulkCreate(annsBulk);

      console.log(`Inserted ${imagesBulk.length} images and ${annsBulk.length} annotations for project ${project.id}`);
    }

    console.log('Seeding done');
    return { success: true, message: 'Data inserted successfully!' };
  } catch (error) {
    console.error('Error inserting data:', error);
    return { success: false, message: error.message };
  } finally {
    updateStatus.running = false;
    console.log('updateStatus.running set to false');
  }
}

module.exports = { seedLabelStudio, updateStatus };