from reportlab.lib.pagesizes import A4, landscape
from reportlab.lib import colors
from reportlab.lib.units import cm, mm
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.platypus import (
    SimpleDocTemplate, Table, TableStyle, Paragraph,
    Spacer, HRFlowable, KeepTogether
)
from reportlab.lib.enums import TA_CENTER, TA_LEFT
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont

OUTPUT = "/tmp/workspace/benign-lesions/Benign_Skin_Lesions_Comparison.pdf"

# ── Colour palette ──────────────────────────────────────────────────────────
DARK_BLUE   = colors.HexColor("#1A3A5C")
MED_BLUE    = colors.HexColor("#2E6DA4")
LIGHT_BLUE  = colors.HexColor("#D6E8F7")
ALT_ROW     = colors.HexColor("#F0F7FF")
WHITE       = colors.white
YELLOW_HDR  = colors.HexColor("#FFF3CD")
GREEN_HDR   = colors.HexColor("#D4EDDA")
RED_LIGHT   = colors.HexColor("#F8D7DA")
GREY_LINE   = colors.HexColor("#CCCCCC")
ORANGE_HDR  = colors.HexColor("#FFE0B2")
PURPLE_HDR  = colors.HexColor("#E8D5F5")

styles = getSampleStyleSheet()

def style(name="Normal", size=8, bold=False, color=colors.black,
          align=TA_LEFT, leading=None):
    return ParagraphStyle(
        name,
        parent=styles["Normal"],
        fontSize=size,
        fontName="Helvetica-Bold" if bold else "Helvetica",
        textColor=color,
        alignment=align,
        leading=leading or size * 1.35,
        spaceAfter=0,
    )

def P(text, **kw):
    return Paragraph(text, style(**kw))

def make_doc():
    doc = SimpleDocTemplate(
        OUTPUT,
        pagesize=landscape(A4),
        leftMargin=1.2*cm, rightMargin=1.2*cm,
        topMargin=1.5*cm, bottomMargin=1.5*cm,
        title="Benign Skin Lesions – Comparison Table",
        author="Orris (based on S Das Manual on Clinical Surgery, 13th Ed.)"
    )
    story = []

    # ── Title block ────────────────────────────────────────────────────────
    story.append(P("Benign Skin & Subcutaneous Lesions", size=18, bold=True,
                   color=DARK_BLUE, align=TA_CENTER))
    story.append(Spacer(1, 3*mm))
    story.append(P("Differential Diagnosis Comparison Table", size=12,
                   color=MED_BLUE, align=TA_CENTER))
    story.append(Spacer(1, 1.5*mm))
    story.append(P("Source: S Das – A Manual on Clinical Surgery, 13th Edition",
                   size=8, color=colors.grey, align=TA_CENTER))
    story.append(Spacer(1, 5*mm))
    story.append(HRFlowable(width="100%", thickness=1.5,
                             color=MED_BLUE, spaceAfter=4*mm))

    # ── DATA ────────────────────────────────────────────────────────────────
    # Columns: Feature | Lipoma | Seb Cyst | Dermoid Cyst | Ganglion | Neurofibroma | Haemangioma | Implant Dermoid
    # Column widths (landscape A4 usable ≈ 267mm)
    col_w = [32*mm, 33*mm, 33*mm, 30*mm, 30*mm, 30*mm, 30*mm, 29*mm]

    def hdr(txt, bg=DARK_BLUE, fg=WHITE):
        return Paragraph(
            f"<b>{txt}</b>",
            ParagraphStyle("h", parent=styles["Normal"],
                           fontSize=8.5, fontName="Helvetica-Bold",
                           textColor=fg, alignment=TA_CENTER,
                           leading=11, spaceAfter=0)
        )

    def cell(txt, bold=False, color=colors.black, size=7.5, align=TA_LEFT):
        fn = "Helvetica-Bold" if bold else "Helvetica"
        return Paragraph(
            txt,
            ParagraphStyle("c", parent=styles["Normal"],
                           fontSize=size, fontName=fn,
                           textColor=color, alignment=align,
                           leading=10, spaceAfter=0)
        )

    tick  = "✓"
    cross = "✗"
    PLUS  = colors.HexColor("#1A5C2A")
    NEG   = colors.HexColor("#8B0000")

    header_row = [
        hdr("Feature"),
        hdr("Lipoma", bg=MED_BLUE),
        hdr("Sebaceous\nCyst", bg=colors.HexColor("#5B7E3A"), fg=WHITE),
        hdr("Dermoid\nCyst", bg=colors.HexColor("#7B4A9E"), fg=WHITE),
        hdr("Ganglion", bg=colors.HexColor("#C76A10"), fg=WHITE),
        hdr("Neurofibroma", bg=colors.HexColor("#2A7B8C"), fg=WHITE),
        hdr("Haemangioma", bg=colors.HexColor("#A63030"), fg=WHITE),
        hdr("Implantation\nDermoid", bg=colors.HexColor("#5C5C00"), fg=WHITE),
    ]

    rows = [
        # (feature, lipoma, seb, dermoid, ganglion, neurofibro, haemangioma, impl_dermoid)
        (
            "Origin / Layer",
            "Subcutaneous\nfat (cluster of\noveractive fat cells)",
            "Sebaceous gland\n(dermis) – blocked\nduct",
            "Embryonic fusion\nlines (congenital\nsequestration)",
            "Mucoid/myxom-\natous degen. of\njoint capsule or\ntendon sheath",
            "Neural (ecto-\ndermal) + fibrous\n(mesodermal)\nelements",
            "Blood vessel\nmalformation\n(capillary or\ncavernous)",
            "Implanted\nepithelial cells\nafter penetrating\ninjury",
        ),
        (
            "Nature",
            "Benign neoplasm\n(true tumour)",
            "Retention cyst\n(not a true\nneoplasm)",
            "Congenital\ncyst",
            "Cyst (pseudo-\ncyst; no\nepithelial lining)",
            "Benign neoplasm\n(true tumour)",
            "Vascular\nhamartoma /\nbenign tumour",
            "Acquired cyst\n(traumatic)",
        ),
        (
            "Age",
            "Any age; rare\nin children",
            "Young adults\n(any age)",
            "Present from\nbirth or childhood",
            "Young adults\n(common)",
            "Any age; adults\ncommonly",
            "Congenital;\npresent at birth\nor infancy",
            "Any age after\npenetrating\ninjury",
        ),
        (
            "Sex",
            "Both; multiple\nlipomas (Dercum's)\nmore in women",
            "Both; M>F\n(scalp/scrotum\nmore in males)",
            "Both equally",
            "Both; young\nwomen slightly\nmore common",
            "Both equally;\nVon Recklinhausen's\nis autosomal\ndominant",
            "Both; M≈F",
            "Both equally",
        ),
        (
            "Common Sites",
            "Back of neck,\nshoulder, back,\nupper limbs\n('Universal tumour')",
            "Scalp, face,\nscrotum;\nNOT palm/sole",
            "Lines of embryonic\nfusion: outer\ncanthus, post-\nauricular, midline,\nsublingual",
            "Dorsum of wrist\n(MC); also palmar\naspect, foot",
            "Along peripheral\nnerves; any site;\nmultiple in VR\ndisease",
            "Face, neck, scalp,\nlimbs; port-wine\nstain on face",
            "Tips of fingers,\npalm, sole (sites\nof penetrating\ninjury)",
        ),
        (
            "Skin attachment",
            "FREE from\noverlying skin",
            "FIXED to\noverlying skin",
            "FREE from\nskin",
            "FREE from skin",
            "FREE from skin;\n(but in VR disease\nmay be multiple\nnodules)",
            "Capillary: IN\nthe skin (port-\nwine) or just\nbelow; Cavern-\nous: subcutaneous",
            "FREE from skin\n(deep to skin)",
        ),
        (
            "Punctum",
            "ABSENT",
            "PRESENT\n(black spot –\npathognomonic)",
            "Absent",
            "Absent",
            "Absent",
            "Absent",
            "Absent",
        ),
        (
            "Slip Sign\n(margin slips\naway from finger)",
            "POSITIVE\n(diagnostic of\nlipoma vs cyst)",
            "Negative\n(edge yields to\nfinger)",
            "Negative\n(edge yields)",
            "Negative;\nmay feel SOLID\n(fluid under\ntension)",
            "Negative;\nfirm nodule",
            "Not applicable\n(compressible,\ncolour change)",
            "Negative\n(edge yields)",
        ),
        (
            "Fluctuation",
            "Semifluctuant\n(fat is semiliquid\nat body temp)",
            "TRUE fluctuation\nPOSITIVE",
            "Fluctuation +ve\n(pultaceous\ncontent)",
            "May feel solid\n(fluid under\ntension); soft\nfluctuation",
            "Absent\n(solid tumour)",
            "Cavernous:\ncompressible;\nCapillary: Not\nfluctuant",
            "Fluctuation +ve",
        ),
        (
            "Transillumination",
            "May + in large\nlipomas\n(fat semiliquid)",
            "NEGATIVE\n(always – despite\nbeing a cyst)",
            "NEGATIVE\n(pultaceous\ncontent opaque)",
            "POSITIVE\n(crystal-clear\ngelatinous fluid)",
            "Negative",
            "Cavernous: may\ntransilluminate;\nCapillary: no",
            "Negative",
        ),
        (
            "Content",
            "Fat (lobules of\nfat cells, fibrous\nsepta, capsule)",
            "Sebum –\nyellowish-white\ncheesy,\npultaceous\n(foul-smelling)",
            "Pultaceous\ncheesy material\n+ skin adnexa;\nNO foul odour",
            "Crystal-clear\ngelatinous /\nmyxoid fluid",
            "Solid neural +\nfibrous tissue\n(no fluid)",
            "Blood (capillary\nor venous\nchannels)",
            "Laminated\nkeratin + skin\nadnexa",
        ),
        (
            "Surface /\nConsistency",
            "LOBULATED,\nsmooth; Soft\n(sometimes\ncalled firm-soft)",
            "SMOOTH, round;\nFirm to soft;\nmargin yields\nto finger",
            "Smooth, round;\nfluctuant;\nmargin yields",
            "Smooth, tense;\nmay feel bony\nhard when fluid\nunder tension",
            "Firm, smooth\nnodule",
            "Capillary: flat,\nred/port-wine;\nCavernous: soft,\nbluish,\ncompressible",
            "Smooth, firm;\nshell-like wall",
        ),
        (
            "Pressure effect /\nSpecial signs",
            "Skin puckers\nif pushed\nsideways\n(fibrous strands\nto capsule)",
            "Sebum can be\nsqueezed out\nthrough punctum",
            "Bony indentation\nat margin when\noverlying bone\n(scalp dermoid)",
            "Becomes tense\nand prominent\non wrist flexion\n(dorsal ganglion)",
            "Moving laterally\n✓; along nerve\ndirection ✗;\nparaesthesia\nalong nerve",
            "Blanches on\npressure (capillary);\ndoes not blanch\n(cavernous)\n+ empties on\npressure",
            "May have sinus\nif previously\ninfected",
        ),
        (
            "Mobility",
            "FREELY mobile\nover skin AND\ndeep structures",
            "Moves WITH\nskin; free from\ndeep structures",
            "FREE from skin\nand deep\nstructures",
            "Moves with\ntendon/joint\ncapsule",
            "Moves laterally\nbut NOT along\nnerve axis",
            "Capillary: fixed\nin skin; Cavernous:\nmobile",
            "Mobile\n(subcutaneous\nlayer)",
        ),
        (
            "Relation to\nPalm/Sole",
            "CAN occur on\npalm/sole\n(universal tumour)",
            "NEVER on\npalm or sole\n(no seb. glands)",
            "Not on palm/sole\n(lines of fusion)",
            "Palmar ganglion\npossible",
            "Can occur\nanywhere",
            "Can occur\nanywhere",
            "COMMON on\npalm/sole and\nfingertips\n(penetrating\ninjury sites)",
        ),
        (
            "Complications",
            "Calcification;\nliposarcoma\narises DE NOVO\n(not from lipoma)",
            "Infection;\nCock's peculiar\ntumour; sebaceous\nhorn; ulceration;\ncarcinomatous\nchange (rare)",
            "Infection; sinus;\nintracranial\nextension\n(scalp dermoid)",
            "Spontaneous\nrupture and\nresolution; recur-\nrence common",
            "Cystic degen-\neration; sarcoma-\ntous change;\nacoustic tumour\n(CN VIII)",
            "Capillary:\ninvolutes spont-\aneously; port-\nwine: permanent;\nCavernous:\ninfection,\nbleeding",
            "Infection;\nsinus formation;\nrecurrence",
        ),
        (
            "Malignant\nPotential",
            "Very low;\nliposarcoma\narises de novo",
            "Rare\ncarcinomatous\nchange",
            "Rare",
            "None",
            "5% in Von\nRecklinhausen's\n→ neuro-\nfibrosarcoma",
            "Capillary: none;\nCavernous:\nexceedingly rare",
            "None\nreported",
        ),
        (
            "Treatment",
            "Excision\n(cosmesis /\nif symptomatic)",
            "Excision with\ncapsule intact;\npuncture and\nsqueeze not\ncurative",
            "Complete\nexcision\n(recurs if\nincomplete)",
            "Aspiration;\nexcision; tradi-\ntional hammer\nrupture (not\nrecommended)",
            "Excision if\nsymptomatic;\nfor single\nneurofibroma",
            "Capillary:\nconservative;\nLaser; Cavernous:\nexcision / scler-\notherapy",
            "Excision\n(complete to\nprevent recur-\nrence)",
        ),
    ]

    # Build table data
    table_data = [header_row]
    feature_labels = [
        "Origin / Layer", "Nature", "Age", "Sex", "Common Sites",
        "Skin attachment", "Punctum", "Slip Sign", "Fluctuation",
        "Transillumination", "Content", "Surface / Consistency",
        "Pressure / Special signs", "Mobility",
        "Palm / Sole", "Complications", "Malignant Potential", "Treatment"
    ]

    for i, row_data in enumerate(rows):
        feat = cell(row_data[0], bold=True, color=DARK_BLUE, size=7.5)
        row_cells = [feat]
        for txt in row_data[1:]:
            row_cells.append(cell(txt, size=7))
        table_data.append(row_cells)

    # Build the table
    t = Table(table_data, colWidths=col_w, repeatRows=1)

    # Build style commands
    ts = [
        # Outer box
        ("BOX",        (0,0), (-1,-1), 1.2, DARK_BLUE),
        # Header row
        ("BACKGROUND", (0,0), (-1,0), DARK_BLUE),
        ("TEXTCOLOR",  (0,0), (-1,0), WHITE),
        ("FONTNAME",   (0,0), (-1,0), "Helvetica-Bold"),
        ("FONTSIZE",   (0,0), (-1,0), 8.5),
        ("ALIGN",      (0,0), (-1,0), "CENTER"),
        ("VALIGN",     (0,0), (-1,-1), "MIDDLE"),
        # Feature column
        ("BACKGROUND", (0,1), (0,-1), LIGHT_BLUE),
        ("FONTNAME",   (0,1), (0,-1), "Helvetica-Bold"),
        # Alternating row colours
    ]

    # Per-column header bg (already set via Paragraph fg; override via TableStyle)
    col_colors = [
        DARK_BLUE,
        MED_BLUE,
        colors.HexColor("#5B7E3A"),
        colors.HexColor("#7B4A9E"),
        colors.HexColor("#C76A10"),
        colors.HexColor("#2A7B8C"),
        colors.HexColor("#A63030"),
        colors.HexColor("#5C5C00"),
    ]
    for ci, bg in enumerate(col_colors):
        ts.append(("BACKGROUND", (ci,0), (ci,0), bg))

    # Alternating row backgrounds
    for ri in range(1, len(table_data)):
        bg = ALT_ROW if ri % 2 == 0 else WHITE
        ts.append(("BACKGROUND", (1, ri), (-1, ri), bg))

    # Grid
    ts += [
        ("INNERGRID",  (0,0), (-1,-1), 0.4, GREY_LINE),
        ("LINEBELOW",  (0,0), (-1,0),  1.2, DARK_BLUE),
        ("LINEAFTER",  (0,0), (0,-1),  1.0, MED_BLUE),
        ("TOPPADDING", (0,0), (-1,-1), 4),
        ("BOTTOMPADDING",(0,0),(-1,-1), 4),
        ("LEFTPADDING",(0,0), (-1,-1), 4),
        ("RIGHTPADDING",(0,0),(-1,-1), 4),
    ]

    # Highlight key distinguishing rows
    key_rows = [6, 7, 8, 9]  # Punctum, Slip Sign, Fluctuation, Transillumination
    for ri in key_rows:
        ts.append(("BACKGROUND", (0, ri), (0, ri), colors.HexColor("#FFF3CD")))

    t.setStyle(TableStyle(ts))
    story.append(t)

    # ── Footer ─────────────────────────────────────────────────────────────
    story.append(Spacer(1, 4*mm))
    story.append(HRFlowable(width="100%", thickness=0.8, color=GREY_LINE))
    story.append(Spacer(1, 2*mm))

    footer_text = (
        "<b>Key clinical clues:</b> "
        "Punctum → Sebaceous cyst (pathognomonic) | "
        "Slip sign → Lipoma | "
        "Crystal-clear fluid + transillumination → Ganglion | "
        "Pultaceous content, transillumination −ve → Dermoid cyst | "
        "Blanches on pressure → Capillary haemangioma | "
        "Paraesthesia along nerve + lateral mobility only → Neurofibroma | "
        "Palm/sole site after injury → Implantation dermoid"
    )
    story.append(P(footer_text, size=7, color=DARK_BLUE))
    story.append(Spacer(1, 1.5*mm))
    story.append(P(
        "Source: S Das – A Manual on Clinical Surgery, 13th Edition  |  Generated by Orris",
        size=6.5, color=colors.grey, align=TA_CENTER
    ))

    doc.build(story)
    print(f"PDF saved to {OUTPUT}")

make_doc()