import { name, version } from '../data.mjs'
import { sample, paperless, buildStylesheet } from './css.mjs'

const grid = {
  metric: `
<pattern id="grid" height="100" width="100" patternUnits="userSpaceOnUse" >
  <path class="gridline-lg" d="M 0 0 L 0 100 L 100 100" />
  <path class="gridline" d="M 50 0 L 50 100 M 0 50 L 100 50" />
  <path class="gridline-sm" d="M 10 0 L 10 100 M 20 0 L 20 100 M 30 0 L 30 100 M 40 0 L 40 100 M 60 0 L 60 100 M 70 0 L 70 100 M 80 0 L 80 100 M 90 0 L 90 100" />
  <path class="gridline-sm" d="M 0 10 L 100 10 M 0 20 L 100 20 M 0 30 L 100 30 M 0 40 L 100 40 M 0 60 L 100 60 M 0 70 L 100 70 M 0 80 L 100 80 M 0 90 L 100 90" />
  <path class="gridline-xs" d="M 5 0 L 5 100 M 15 0 L 15 100 M 25 0 L 25 100 M 35 0 L 35 100 M 45 0 L 45 100 M 55 0 L 55 100 M 65 0 L 65 100 M 75 0 L 75 100 M 85 0 L 85 100 M 95 0 L 95 100" />
  <path class="gridline-xs" d="M 0 5 L 100 5 M 0 15 L 100 15 M 0 25 L 100 25 M 0 35 L 100 35 M 0 45 L 100 45 M 0 55 L 100 55 M 0 65 L 100 65 M 0 75 L 100 75 M 0 85 L 100 85 M 0 95 L 100 95" />
</pattern>`,
  imperial: `
<pattern id="grid" height="25.4" width="25.4" patternUnits="userSpaceOnUse" >
  <path class="gridline-lg" d="M 0 0 L 0 25.4 L 25.4 25.4" />
  <path class="gridline" d="M 12.7 0 L 12.7 25.4 M 0 12.7 L 25.4 12.7" />
  <path class="gridline-sm" d="M 3.175 0 L 3.175 25.4 M 6.32 0 L 6.35 25.4 M 9.525 0 L 9.525 25.4 M 15.875 0 L 15.875 25.4 M 19.05 0 L 19.05 25.4 M 22.225 0 L 22.225 25.4" />
  <path class="gridline-sm" d="M 0 3.175 L 25.4 3.175 M 0 6.32 L 25.4 6.35 M 0 9.525 L 25.4 9.525 M 0 15.875 L 25.4 15.875 M 0 19.05 L 25.4 19.05 M 0 22.225 L 25.4 22.225" />
</pattern>`,
}

export const plugin = {
  name,
  version,
  hooks: {
    preRender: function (svg, data = {}) {
      const current = svg.attributes.get('class')
      if (!current || current.indexOf('freesewing') !== -1) {
        svg.attributes.set('class', 'freesewing')
        svg.style += sample
        svg.style += paperless
        svg.style += buildStylesheet(svg.pattern.settings.scale, data.stripped)
        if (svg.pattern.settings.paperless) {
          svg.pattern.settings.units === 'imperial'
            ? (svg.defs += grid.imperial)
            : (svg.defs += grid.metric)
          for (const key in svg.pattern.parts) {
            const part = svg.pattern.parts[key]
            if (!part.hidden && svg.pattern.needs(key)) {
              let anchor = new svg.pattern.Point(0, 0)
              if (typeof part.points.gridAnchor !== 'undefined') anchor = part.points.gridAnchor
              else if (typeof part.points.anchor !== 'undefined') anchor = part.points.anchor
              svg.defs += `<pattern id="grid_${key}" `
              svg.defs += `xlink:href="#grid" x="${anchor.x}" y="${anchor.y}">`
              svg.defs += '</pattern>'
              part.paths[part.getId()] = new svg.pattern.Path()
                .move(part.topLeft)
                .line(new svg.pattern.Point(part.topLeft.x, part.bottomRight.y))
                .line(part.bottomRight)
                .line(new svg.pattern.Point(part.bottomRight.x, part.topLeft.y))
                .close()
                .attr('class', 'grid')
                .attr('style', `fill: url(#grid_${key})`)
            }
          }
        }
      }
    },
  },
}

// More specifically named exports
export const themePlugin = plugin
export const pluginTheme = plugin