from reportlab.lib.units import inch
from reportlab.pdfgen import canvas
from PIL import Image, ImageDraw
import os
import tempfile

# Colors (R, G, B)
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
RED = (255, 0, 0)
GREEN = (0, 128, 0)
BLUE = (0, 0, 255)
YELLOW = (255, 255, 0)
CYAN = (0, 255, 255)
MAGENTA = (255, 0, 255)
GRAY = (128, 128, 128)
LIGHT_GRAY = (192, 192, 192)
DARK_GRAY = (64, 64, 64)


class LoadedImage:
    def __init__(self, filepath):
        if not os.path.exists(filepath):
            raise FileNotFoundError(f"Image not found: {filepath}")
        self.filepath = filepath
        self.image = Image.open(filepath)

    def CropPixelsL(self, pixels):
        w, h = self.image.size
        self.image = self.image.crop((pixels, 0, w, h))
        return self

    def CropPixelsR(self, pixels):
        w, h = self.image.size
        self.image = self.image.crop((0, 0, w - pixels, h))
        return self

    def CropPixelsT(self, pixels):
        w, h = self.image.size
        self.image = self.image.crop((0, pixels, w, h))
        return self

    def CropPixelsB(self, pixels):
        w, h = self.image.size
        self.image = self.image.crop((0, 0, w, h - pixels))
        return self

    def CropSquare(self):
        w, h = self.image.size
        if w > h:
            excess = w - h
            left = excess // 2
            self.image = self.image.crop((left, 0, left + h, h))
        elif h > w:
            excess = h - w
            top = excess // 2
            self.image = self.image.crop((0, top, w, top + w))
        return self

    def KeepPixelsT(self, pixels):
        w, h = self.image.size
        self.image = self.image.crop((0, 0, w, pixels))
        return self

    def KeepPixelsB(self, pixels):
        w, h = self.image.size
        self.image = self.image.crop((0, h - pixels, w, h))
        return self

    def KeepPixelsL(self, pixels):
        w, h = self.image.size
        self.image = self.image.crop((0, 0, pixels, h))
        return self

    def KeepPixelsR(self, pixels):
        w, h = self.image.size
        self.image = self.image.crop((w - pixels, 0, w, h))
        return self

    def KeepSquare(self, pixels):
        w, h = self.image.size
        cx, cy = w // 2, h // 2
        half = pixels // 2
        self.image = self.image.crop((cx - half, cy - half, cx - half + pixels, cy - half + pixels))
        return self


def ReadPNG(filepath):
    return LoadedImage(filepath)


def ReadJPG(filepath):
    return LoadedImage(filepath)


DPI = 300


class NewPDF:
    def __init__(self, width_inches, height_inches):
        self.width_inches = width_inches
        self.height_inches = height_inches
        self.width = width_inches * inch
        self.height = height_inches * inch
        self._ops = []

    def layer(self, img, x_inches, y_inches, w_inches, h_inches):
        self._ops.append(("layer", img, x_inches, y_inches, w_inches, h_inches))

    def copy(self, x0, y0, x1, y1, x2, y2):
        self._ops.append(("copy", x0, y0, x1, y1, x2, y2))

    def fill(self, color):
        self._ops.append(("fill", color))

    def line(self, color, x0, y0, x1, y1, width=1):
        self._ops.append(("line", color, x0, y0, x1, y1, width))

    def save(self, filename):
        pw = int(self.width_inches * DPI)
        ph = int(self.height_inches * DPI)
        page = Image.new("RGBA", (pw, ph), (255, 255, 255, 255))

        for op in self._ops:
            if op[0] == "layer":
                _, img, x, y, w, h = op
                xp = int(x * DPI)
                yp = int(y * DPI)
                wp = int(w * DPI)
                hp = int(h * DPI)
                resized = img.image.resize((wp, hp), Image.LANCZOS)
                if resized.mode == "RGBA":
                    page.paste(resized, (xp, yp), resized)
                else:
                    page.paste(resized, (xp, yp))
            elif op[0] == "copy":
                _, x0, y0, x1, y1, x2, y2 = op
                region = page.crop((
                    int(x0 * DPI), int(y0 * DPI),
                    int(x1 * DPI), int(y1 * DPI),
                ))
                page.paste(region, (int(x2 * DPI), int(y2 * DPI)))
            elif op[0] == "fill":
                _, color = op
                page.paste(color + (255,), (0, 0, pw, ph))
            elif op[0] == "line":
                _, color, x0, y0, x1, y1, width = op
                draw = ImageDraw.Draw(page)
                draw.line(
                    [(int(x0 * DPI), int(y0 * DPI)),
                     (int(x1 * DPI), int(y1 * DPI))],
                    fill=color + (255,), width=width,
                )

        # Write composited image to PDF
        rgb_page = page.convert("RGB")
        c = canvas.Canvas(filename, pagesize=(self.width, self.height))
        tmp = tempfile.NamedTemporaryFile(suffix=".png", delete=False)
        try:
            rgb_page.save(tmp.name, "PNG")
            c.drawImage(tmp.name, 0, 0, self.width, self.height)
        finally:
            os.unlink(tmp.name)
        c.save()
        print(f"Saved: {filename}")


# ── Example usage ──
if __name__ == "__main__":
    outfile = NewPDF(8.5, 11)
    a = ReadPNG("mushroom.png")
    b = ReadPNG("PictureFrame.png")
    outfile.layer(a, 0.5, 0.5, 3.5, 3.5)
    outfile.layer(b, 0.5, 0.5, 3.5, 3.5)
    outfile.save("output.pdf")