import chroma, pixie, pixie/fileformats/png, strformat

block:
  let pathStr = """
  m 1 2 3 4 5 6
  """
  let path = parsePath(pathStr)
  doAssert $path == "m1 2 m3 4 m5 6"

block:
  let pathStr = """
    m 1 2
    l 3 4
    h 5
    v 6
    c 0 0 0 0 0 0
    q 1 1 1 1
    t 2 2
    a 7 7 7 7 7 7 7
    z
  """
  let path = parsePath(pathStr)
  doAssert $path == "m1 2 l3 4 h5 v6 c0 0 0 0 0 0 q1 1 1 1 t2 2 a7 7 7 7 7 7 7 Z"

block:
  let pathStr = """
    M 1 2
    L 3 4
    H 5
    V 6
    C 0 0 0 0 0 0
    Q 1 1 1 1
    T 2 2
    A 7 7 7 7 7 7 7
    z
  """
  let path = parsePath(pathStr)
  doAssert $path == "M1 2 L3 4 H5 V6 C0 0 0 0 0 0 Q1 1 1 1 T2 2 A7 7 7 7 7 7 7 Z"

block:
  let
    pathStr = "M 0.1E-10 0.1e10 L2+2 L3-3 L0.1E+10-1"
    path = parsePath(pathStr)

block:
  let
    image = newImage(100, 100)
    pathStr = "M 10 10 L 90 90"
    color = rgba(255, 0, 0, 255)
  image.strokePath(pathStr, color, strokeWidth = 10)
  image.writeFile("tests/images/paths/pathStroke1.png")

block:
  let
    image = newImage(100, 100)
    pathStr = "M 10 10 L 50 60 90 90"
    color = rgba(255, 0, 0, 255)
  image.strokePath(pathStr, color, strokeWidth = 10)
  image.writeFile("tests/images/paths/pathStroke2.png")

block:
  let image = newImage(100, 100)
  image.strokePath(
    "M 15 10 L 30 90 60 30 90 90",
    rgba(255, 255, 0, 255),
    strokeWidth = 10
  )
  image.writeFile("tests/images/paths/pathStroke3.png")

block:
  let
    image = newImage(100, 100)
    pathStr = "M 10 10 H 90 V 90 H 10 L 10 10"
    color = rgba(0, 0, 0, 255)
  image.fillPath(pathStr, color)
  image.writeFile("tests/images/paths/pathBlackRectangle.png")

block:
  let
    image = newImage(100, 100)
    pathStr = "M 10 10 H 90 V 90 H 10 Z"
    color = rgba(0, 0, 0, 255)
  image.fillPath(parsePath(pathStr), color)
  image.writeFile("tests/images/paths/pathBlackRectangleZ.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M 10 10 H 90 V 90 H 10 L 10 10",
    rgba(255, 255, 0, 255)
  )
  image.writeFile("tests/images/paths/pathYellowRectangle.png")

block:
  var path: Path
  path.moveTo(10, 10)
  path.lineTo(10, 90)
  path.lineTo(90, 90)
  path.lineTo(90, 10)
  path.lineTo(10, 10)

  let image = newImage(100, 100)
  image.fillPath(path, rgba(255, 0, 0, 255))
  image.writeFile("tests/images/paths/pathRedRectangle.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M30 60 A 20 20 0 0 0 90 60 L 30 60",
    parseHtmlColor("#FC427B").rgba
  )
  image.writeFile("tests/images/paths/pathBottomArc.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    """
      M 10,30
      A 20,20 0,0,1 50,30
      A 20,20 0,0,1 90,30
      Q 90,60 50,90
      Q 10,60 10,30 z
    """,
    parseHtmlColor("#FC427B").rgba
  )
  image.writeFile("tests/images/paths/pathHeart.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M 20 50 A 20 10 45 1 1 80 50 L 20 50",
    parseHtmlColor("#FC427B").rgba
  )
  image.writeFile("tests/images/paths/pathRotatedArc.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M 0 50 A 50 50 0 0 0 50 0 L 50 50 L 0 50",
    parseHtmlColor("#FC427B").rgba
  )
  image.writeFile("tests/images/paths/pathInvertedCornerArc.png")

block:
  let image = newImage(100, 100)
  image.fillPath(
    "M 0 50 A 50 50 0 0 1 50 0 L 50 50 L 0 50",
    parseHtmlColor("#FC427B").rgba
  )
  image.writeFile("tests/images/paths/pathCornerArc.png")

# block:
#   let
#     image = newImage(100, 100)
#     r = 10.0
#     x = 10.0
#     y = 10.0
#     h = 80.0
#     w = 80.0
#   var path: Path
#   path.moveTo(x + r, y)
#   path.arcTo(x + w, y, x + w, y + h, r)
#   path.arcTo(x + w, y + h, x, y + h, r)
#   path.arcTo(x, y + h, x, y, r)
#   path.arcTo(x, y, x + w, y, r)
#   image.fillPath(path, rgba(255, 0, 0, 255))
#   image.writeFile("tests/images/paths/pathRoundRect.png")

block:
  let
    mask = newMask(100, 100)
    pathStr = "M 10 10 H 90 V 90 H 10 L 10 10"
  mask.fillPath(pathStr)
  writeFile("tests/images/paths/pathRectangleMask.png", mask.encodePng())

# block:
#   let
#     mask = newMask(100, 100)
#     r = 10.0
#     x = 10.0
#     y = 10.0
#     h = 80.0
#     w = 80.0
#   var path: Path
#   path.moveTo(x + r, y)
#   path.arcTo(x + w, y, x + w, y + h, r)
#   path.arcTo(x + w, y + h, x, y + h, r)
#   path.arcTo(x, y + h, x, y, r)
#   path.arcTo(x, y, x + w, y, r)
#   mask.fillPath(path)
#   writeFile("tests/images/paths/pathRoundRectMask.png", mask.encodePng())

block:
  let image = newImage(200, 200)
  image.fill(rgba(255, 255, 255, 255))

  var p = parsePath("M1 0.5C1 0.776142 0.776142 1 0.5 1C0.223858 1 0 0.776142 0 0.5C0 0.223858 0.223858 0 0.5 0C0.776142 0 1 0.223858 1 0.5Z")
  image.fillPath(p, rgba(255, 0, 0, 255), scale(vec2(200, 200)))

  image.strokePath(p, rgba(0, 255, 0, 255), scale(vec2(200, 200)),
      strokeWidth = 0.01)

  image.writeFile("tests/images/paths/pixelScale.png")

block:
  let
    image = newImage(60, 60)
    path = parsePath("M 3 3 L 20 3 L 20 20 L 3 20 Z")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcRound, ljRound)

  image.writeFile("tests/images/paths/boxRound.png")

block:
  let
    image = newImage(60, 60)
    path = parsePath("M 3 3 L 20 3 L 20 20 L 3 20 Z")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcRound, ljBevel)

  image.writeFile("tests/images/paths/boxBevel.png")

block:
  let
    image = newImage(60, 60)
    path = parsePath("M 3 3 L 20 3 L 20 20 L 3 20 Z")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcRound, ljMiter)

  image.writeFile("tests/images/paths/boxMiter.png")

block:
  let
    image = newImage(60, 60)
    path = parsePath("M 3 3 L 20 3 L 20 20 L 3 20")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcButt, ljBevel)

  image.writeFile("tests/images/paths/lcButt.png")

block:
  let
    image = newImage(60, 60)
    path = parsePath("M 3 3 L 20 3 L 20 20 L 3 20")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcRound, ljBevel)

  image.writeFile("tests/images/paths/lcRound.png")

block:
  let
    image = newImage(60, 60)
    path = parsePath("M 3 3 L 20 3 L 20 20 L 3 20")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcSquare, ljBevel)

  image.writeFile("tests/images/paths/lcSquare.png")

block:
  let
    image = newImage(60, 120)
    path = parsePath("M 0 0 L 50 0")
  image.fill(rgba(255, 255, 255, 255))

  image.strokePath(
    path, rgba(0, 0, 0, 255), vec2(5, 5), 10, lcButt, ljBevel,
  )

  image.strokePath(
    path, rgba(0, 0, 0, 255), vec2(5, 25), 10, lcButt, ljBevel,
    dashes = @[2.float32, 2]
  )

  image.strokePath(
    path, rgba(0, 0, 0, 255), vec2(5, 45), 10, lcButt, ljBevel,
    dashes = @[4.float32, 4]
  )

  image.strokePath(
    path, rgba(0, 0, 0, 255), vec2(5, 65), 10, lcButt, ljBevel,
    dashes = @[2.float32, 4, 6, 2]
  )

  image.strokePath(
    path, rgba(0, 0, 0, 255), vec2(5, 85), 10, lcButt, ljBevel,
    dashes = @[1.float32]
  )

  image.strokePath(
    path, rgba(0, 0, 0, 255), vec2(5, 105), 10, lcButt, ljBevel,
    dashes = @[1.float32, 2, 3, 4, 5, 6, 7, 8, 9]
  )

  image.writeFile("tests/images/paths/dashes.png")

block:
  proc miterTest(angle, limit: float32) =
    let
      image = newImage(60, 60)
    image.fill(rgba(255, 255, 255, 255))
    var path: Path
    path.moveTo(-20, 0)
    path.lineTo(0, 0)
    let th = angle.float32.degToRad() + PI/2
    path.lineTo(sin(th)*20, cos(th)*20)

    image.strokePath(
      path, rgba(0, 0, 0, 255), vec2(30, 30), 8, lcButt, ljMiter,
      miterLimit = limit
    )
    image.writeFile(&"tests/images/paths/miterLimit_{angle.int}deg_{limit:0.2f}num.png")

  miterTest(10, 2)
  miterTest(145, 2)
  miterTest(155, 2)
  miterTest(165, 2)
  miterTest(165, 10)
  miterTest(145, 3.32)
  miterTest(145, 3.33)

# Potential error cases, ensure they do not crash

block:
  let
    image = newImage(60, 60)
    path = parsePath("M 3 3 L 3 3 L 3 3")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcSquare, ljMiter)

block:
  let
    image = newImage(60, 60)
    path = parsePath("L 0 0 L 0 0")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcSquare, ljMiter)

block:
  let
    image = newImage(60, 60)
    path = parsePath("L 1 1")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcSquare, ljMiter)

block:
  let
    image = newImage(60, 60)
    path = parsePath("L 0 0")
  image.fill(rgba(255, 255, 255, 255))
  image.strokePath(path, rgba(0, 0, 0, 255), vec2(10, 10), 10, lcSquare, ljMiter)