from reportlab.lib.pagesizes import A4
from reportlab.lib import colors
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.lib.units import cm
from reportlab.platypus import (
    SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle,
    HRFlowable, KeepTogether
)
from reportlab.lib.enums import TA_CENTER, TA_LEFT, TA_RIGHT
from reportlab.platypus import PageBreak

OUTPUT = "/home/daytona/workspace/study-plan/Ramzan_Practical_ExamPlan.pdf"

# ── colour palette ──────────────────────────────────────────────────────────
C_DARK    = colors.HexColor("#1a237e")   # deep indigo  – headers
C_BIO     = colors.HexColor("#1b5e20")   # dark green   – biochemistry
C_PP      = colors.HexColor("#b71c1c")   # dark red     – physical pharmacy
C_BIO_LT  = colors.HexColor("#e8f5e9")   # light green  – bio rows
C_PP_LT   = colors.HexColor("#ffebee")   # light red    – PP rows
C_HEAD_BG = colors.HexColor("#e8eaf6")   # light indigo – section headers
C_GOLD    = colors.HexColor("#f57f17")   # amber        – highlight
C_WHITE   = colors.white
C_LGREY   = colors.HexColor("#f5f5f5")

doc = SimpleDocTemplate(
    OUTPUT, pagesize=A4,
    leftMargin=1.5*cm, rightMargin=1.5*cm,
    topMargin=1.8*cm, bottomMargin=1.8*cm
)

styles = getSampleStyleSheet()

# custom paragraph styles
def PS(name, parent="Normal", **kw):
    return ParagraphStyle(name, parent=styles[parent], **kw)

sTitle   = PS("sTitle",   fontSize=20, textColor=C_DARK,  alignment=TA_CENTER, spaceAfter=4,  fontName="Helvetica-Bold")
sSub     = PS("sSub",     fontSize=11, textColor=C_DARK,  alignment=TA_CENTER, spaceAfter=2,  fontName="Helvetica")
sInfo    = PS("sInfo",    fontSize=9,  textColor=colors.HexColor("#555555"), alignment=TA_CENTER, spaceAfter=6)
sDayHdr  = PS("sDayHdr",  fontSize=13, textColor=C_WHITE, alignment=TA_CENTER, fontName="Helvetica-Bold", spaceAfter=0)
sSessHdr = PS("sSessHdr", fontSize=10, textColor=C_DARK,  fontName="Helvetica-Bold", spaceAfter=2)
sBody    = PS("sBody",    fontSize=9,  leading=13, spaceAfter=2)
sBullet  = PS("sBullet",  fontSize=8.5, leading=12, leftIndent=12)
sTip     = PS("sTip",     fontSize=8,  textColor=C_GOLD, fontName="Helvetica-Oblique", spaceAfter=4)
sFooter  = PS("sFooter",  fontSize=8,  textColor=colors.grey, alignment=TA_CENTER)
sExam    = PS("sExam",    fontSize=10, textColor=C_WHITE, fontName="Helvetica-Bold", alignment=TA_CENTER)

W = A4[0] - 3*cm   # usable width

elements = []

# ── HEADER ──────────────────────────────────────────────────────────────────
elements.append(Paragraph("PRACTICAL EXAM STUDY PLAN", sTitle))
elements.append(Paragraph("Ramzan Hafeez | Akhtar Saeed College of Pharmacy, Canal Campus", sSub))
elements.append(Paragraph("Affiliated with Punjab University Lahore", sInfo))
elements.append(HRFlowable(width="100%", thickness=2, color=C_DARK, spaceAfter=6))

# exam info table
exam_data = [
    [Paragraph("<b>EXAM SCHEDULE</b>", PS("eh", fontSize=10, textColor=C_WHITE, fontName="Helvetica-Bold", alignment=TA_CENTER)), "", ""],
    [Paragraph("<b>Subject</b>", PS("eh2", fontSize=9, textColor=C_DARK, fontName="Helvetica-Bold", alignment=TA_CENTER)),
     Paragraph("<b>Date</b>", PS("eh3", fontSize=9, textColor=C_DARK, fontName="Helvetica-Bold", alignment=TA_CENTER)),
     Paragraph("<b>Exam Components</b>", PS("eh4", fontSize=9, textColor=C_DARK, fontName="Helvetica-Bold", alignment=TA_CENTER))],
    [Paragraph("Biochemistry", PS("bio_c", fontSize=9, textColor=C_BIO, fontName="Helvetica-Bold", alignment=TA_CENTER)),
     Paragraph("19-06-2026 (Friday)", PS("d1", fontSize=9, alignment=TA_CENTER)),
     Paragraph("Write-up: 20 marks | Performance: 40 marks | Viva: 40 marks", PS("c1", fontSize=8.5, alignment=TA_CENTER))],
    [Paragraph("Physical Pharmacy", PS("pp_c", fontSize=9, textColor=C_PP, fontName="Helvetica-Bold", alignment=TA_CENTER)),
     Paragraph("20-06-2026 (Saturday)", PS("d2", fontSize=9, alignment=TA_CENTER)),
     Paragraph("Write-up: 20 marks | Performance: 40 marks | Viva: 40 marks", PS("c2", fontSize=8.5, alignment=TA_CENTER))],
]
et = Table(exam_data, colWidths=[W*0.28, W*0.25, W*0.47])
et.setStyle(TableStyle([
    ("SPAN",        (0,0),(2,0)),
    ("BACKGROUND",  (0,0),(2,0), C_DARK),
    ("BACKGROUND",  (0,1),(2,1), C_HEAD_BG),
    ("BACKGROUND",  (0,2),(2,2), C_BIO_LT),
    ("BACKGROUND",  (0,3),(2,3), C_PP_LT),
    ("BOX",         (0,0),(2,3), 1, C_DARK),
    ("INNERGRID",   (0,0),(2,3), 0.5, colors.HexColor("#cccccc")),
    ("VALIGN",      (0,0),(-1,-1), "MIDDLE"),
    ("TOPPADDING",  (0,0),(-1,-1), 5),
    ("BOTTOMPADDING",(0,0),(-1,-1), 5),
]))
elements.append(et)
elements.append(Spacer(1, 10))

# ── STUDY PLAN DATA ──────────────────────────────────────────────────────────
# Each day: (day_label, date_str, sessions)
# Each session: (session_label, bio_topics, pp_topics, tip)
# No clock times – just named sessions

plan = [
    {
        "day": "DAY 1 – FRIDAY",
        "date": "12 June 2026",
        "note": "Start: 9:00 PM tonight",
        "sessions": [
            {
                "label": "Evening Session",
                "bio": [
                    "Basic Biochemistry – cell overview, biomolecules intro",
                    "Carbohydrates – monosaccharides, disaccharides, polysaccharides, reducing sugars",
                ],
                "pp": [
                    "Orientation – History & Literature of Pharmacy",
                    "Physico-Chemical Principles: Solutions – types, concentration expressions, colligative properties",
                ],
                "tip": "Write-up tip: Practise drawing glucose & fructose structures from memory.",
            },
        ],
    },
    {
        "day": "DAY 2 – SATURDAY",
        "date": "13 June 2026",
        "note": "",
        "sessions": [
            {
                "label": "Morning Session",
                "bio": [
                    "Lipids – classification, fatty acids, triglycerides, phospholipids, steroids",
                    "Proteins & Amino Acids – classification, peptide bond, protein structure (1°–4°)",
                ],
                "pp": [
                    "Solubilization – micellar solubilization, factors affecting solubility",
                    "Adsorption – Freundlich & Langmuir isotherms, adsorption types",
                ],
                "tip": "Viva tip: Know Henderson-Hasselbalch equation for ionization; relate to drug absorption.",
            },
            {
                "label": "Afternoon Session",
                "bio": [
                    "Nucleic Acids – DNA & RNA structure, Watson-Crick model, types of RNA",
                    "Review: Carbohydrates & Lipids practicals (practical notebook – practicals 1-6)",
                ],
                "pp": [
                    "Ionization – pKa, pH, degree of ionization, Henderson-Hasselbalch",
                    "Hydrolysis – types, factors affecting, pharmaceutical significance",
                ],
                "tip": "Practical tip: Revise at least 5 practicals from each notebook daily.",
            },
            {
                "label": "Evening Session",
                "bio": [
                    "Vitamins – fat-soluble (A, D, E, K) and water-soluble (B-complex, C); deficiency diseases",
                ],
                "pp": [
                    "Micromeritics – particle size, methods of measurement, derived properties (bulk density, porosity)",
                ],
                "tip": "Write-up: Memorise deficiency diseases table for vitamins; sketch micromeritics flowchart.",
            },
        ],
    },
    {
        "day": "DAY 3 – SUNDAY",
        "date": "14 June 2026",
        "note": "",
        "sessions": [
            {
                "label": "Morning Session",
                "bio": [
                    "Hormones – classification, mechanism of action (steroid vs peptide), major hormones",
                    "Enzymes – nomenclature, classification, enzyme kinetics basics",
                ],
                "pp": [
                    "Dispersion Systems: Colloids – types, properties, zeta potential, Tyndall effect",
                    "Colloids – lyophilic vs lyophobic, protective colloids, applications in pharmacy",
                ],
                "tip": "Viva tip: Understand Km and Vmax deeply; examiners love Michaelis-Menten graph questions.",
            },
            {
                "label": "Afternoon Session",
                "bio": [
                    "Michaelis-Menten Equation – derivation concept, Lineweaver-Burk plot, enzyme inhibition",
                    "Review practicals: Enzymes & Proteins (practical notebook – practicals 7-12)",
                ],
                "pp": [
                    "Emulsions – types (O/W, W/O), emulsifying agents, HLB system, stability",
                    "Emulsions – preparation methods, tests for emulsion type",
                ],
                "tip": "Practical tip: Know how to identify emulsion type (conductivity test, dilution test).",
            },
            {
                "label": "Evening Session",
                "bio": [
                    "Metabolic Fate of Carbohydrates – Glycolysis (steps, enzymes, net ATP), TCA cycle overview",
                ],
                "pp": [
                    "Suspensions – formulation, sedimentation, caking, flocculation vs deflocculation, Stokes law",
                ],
                "tip": "Write-up: Draw glycolysis pathway with ATP yield; draw Stokes law formula derivation.",
            },
        ],
    },
    {
        "day": "DAY 4 – MONDAY",
        "date": "15 June 2026",
        "note": "",
        "sessions": [
            {
                "label": "Morning Session",
                "bio": [
                    "Metabolic Fate of Carbohydrates (cont.) – Gluconeogenesis, glycogen metabolism, HMP pathway",
                    "Metabolic Fate of Lipids – Beta-oxidation of fatty acids (steps & ATP count)",
                ],
                "pp": [
                    "Rheology – Newtonian & Non-Newtonian flow, viscosity, viscoelasticity",
                    "Rheology – plastic, pseudoplastic, dilatant flow; thixotropy; pharmaceutical applications",
                ],
                "tip": "Viva tip: Beta-oxidation ATP count is a favourite viva question – practise calculating it.",
            },
            {
                "label": "Afternoon Session",
                "bio": [
                    "Metabolic Fate of Lipids (cont.) – Fatty acid synthesis, ketone bodies, cholesterol metabolism",
                    "Metabolic Fate of Proteins & Amino Acids – transamination, deamination, urea cycle",
                ],
                "pp": [
                    "Physicochemical Processes – Precipitation, Crystallization (nucleation, crystal growth, polymorphism)",
                    "Distillation – simple, fractional, steam, vacuum; pharmaceutical uses",
                ],
                "tip": "Write-up: Draw urea cycle clearly; label all intermediates.",
            },
            {
                "label": "Evening Session",
                "bio": [
                    "Review practicals: Carbohydrate metabolism & Lipid metabolism (practical notebook – practicals 13-18)",
                ],
                "pp": [
                    "Miscellaneous Processes – Lyophilization, sublimation, drying, filtration",
                    "Extraction Processes – maceration, percolation, Soxhlet; solvent selection",
                ],
                "tip": "Practical tip: Know the principle and steps of each extraction process for viva.",
            },
        ],
    },
    {
        "day": "DAY 5 – TUESDAY",
        "date": "16 June 2026",
        "note": "",
        "sessions": [
            {
                "label": "Morning Session",
                "bio": [
                    "Bioenergetics – ATP structure, oxidative phosphorylation, electron transport chain, chemiosmosis",
                    "Gene Expression – transcription, translation, genetic code, post-translational modifications",
                ],
                "pp": [
                    "Rate & Order of Reactions – zero, first, second order; half-life; shelf life calculations",
                    "Kinetic Principles & Stability Testing – Arrhenius equation, accelerated stability testing, Q10 rule",
                ],
                "tip": "Viva tip: ETC complex numbers (I–IV) and their inhibitors are high-yield viva topics.",
            },
            {
                "label": "Afternoon Session",
                "bio": [
                    "Introduction to Clinical Chemistry – normal lab values, interpretation basics",
                    "Review practicals: Gene Expression & Clinical Chemistry (practical notebook – practicals 19-25)",
                ],
                "pp": [
                    "Review Physical Pharmacy practicals – practicals 1-12 (focus on write-up format)",
                    "Review Physical Pharmacy practicals – practicals 13-24 (focus on calculations)",
                ],
                "tip": "Write-up tip: For stability testing, practise Arrhenius calculations with numbers.",
            },
            {
                "label": "Evening Session",
                "bio": [
                    "FULL REVISION – Nucleic Acids, Vitamins, Hormones, Enzymes (Michaelis-Menten)",
                    "Speed-revise: Metabolic pathways overview – draw all in one page as a mind-map",
                ],
                "pp": [
                    "FULL REVISION – Dispersion Systems (Colloids, Emulsions, Suspensions)",
                    "Speed-revise: Rheology flow curves + Micromeritics formulae sheet",
                ],
                "tip": "Tonight: Write 5 most expected viva questions per subject and prepare concise answers.",
            },
        ],
    },
    {
        "day": "DAY 6 – WEDNESDAY (FINAL DAY)",
        "date": "17 June 2026",
        "note": "End: 3:00 PM",
        "sessions": [
            {
                "label": "Morning Session",
                "bio": [
                    "Quick revision – Bioenergetics, Gene Expression, Clinical Chemistry",
                    "Practise writing up 2 random practicals (from notebook) in timed conditions",
                ],
                "pp": [
                    "Quick revision – Solutions, Solubilization, Ionization, Hydrolysis",
                    "Practise writing up 2 random practicals (from notebook) in timed conditions",
                ],
                "tip": "Performance tip: Practise lab procedures mentally – reagent names, observation, result, inference.",
            },
            {
                "label": "Final Revision (until 3 PM)",
                "bio": [
                    "Read all self-made notes & formulae",
                    "Revise key diagrams: Michaelis-Menten, DNA replication, metabolic pathways",
                ],
                "pp": [
                    "Read all self-made notes & formulae",
                    "Revise key diagrams: Phase diagrams, flow curves, emulsion stability, reaction order graphs",
                ],
                "tip": "STOP at 3:00 PM. Rest, eat well, sleep early before exams. Confidence is your best tool now.",
            },
        ],
    },
]

# ── RENDER DAYS ──────────────────────────────────────────────────────────────

for day_data in plan:
    day_elements = []

    # Day header bar
    day_table = Table(
        [[Paragraph(f"{day_data['day']}   |   {day_data['date']}"
                    + (f"   ({day_data['note']})" if day_data['note'] else ""),
                    sDayHdr)]],
        colWidths=[W]
    )
    day_table.setStyle(TableStyle([
        ("BACKGROUND", (0,0),(0,0), C_DARK),
        ("TOPPADDING",    (0,0),(0,0), 7),
        ("BOTTOMPADDING", (0,0),(0,0), 7),
        ("LEFTPADDING",   (0,0),(0,0), 10),
        ("BOX",           (0,0),(0,0), 1, C_DARK),
    ]))
    day_elements.append(day_table)
    day_elements.append(Spacer(1, 4))

    for sess in day_data["sessions"]:
        # Session label
        day_elements.append(Paragraph(f"▶  {sess['label']}", sSessHdr))

        # Build bio & pp bullet lists
        bio_paras = [Paragraph(f"• {t}", sBullet) for t in sess["bio"]]
        pp_paras  = [Paragraph(f"• {t}", sBullet) for t in sess["pp"]]

        # two-column subject table
        bio_header = Paragraph("BIOCHEMISTRY", PS("bh", fontSize=9, textColor=C_WHITE,
                                                   fontName="Helvetica-Bold", alignment=TA_CENTER))
        pp_header  = Paragraph("PHYSICAL PHARMACY", PS("ph", fontSize=9, textColor=C_WHITE,
                                                        fontName="Helvetica-Bold", alignment=TA_CENTER))

        inner = Table(
            [[bio_header, pp_header]] +
            [[b, p] for b, p in zip(bio_paras, pp_paras)] +
            # pad shorter column
            ([[Paragraph("", sBullet), p] for p in pp_paras[len(bio_paras):]] if len(pp_paras) > len(bio_paras) else []) +
            ([[b, Paragraph("", sBullet)] for b in bio_paras[len(pp_paras):]] if len(bio_paras) > len(pp_paras) else []),
            colWidths=[W*0.5 - 2, W*0.5 - 2],
            spaceBefore=2, spaceAfter=2
        )

        # We'll build rows manually for correct coloring
        bio_rows = [[bio_header, pp_header]]
        max_len = max(len(bio_paras), len(pp_paras))
        for i in range(max_len):
            bc = bio_paras[i] if i < len(bio_paras) else Paragraph("", sBullet)
            pc = pp_paras[i]  if i < len(pp_paras)  else Paragraph("", sBullet)
            bio_rows.append([bc, pc])

        inner = Table(bio_rows, colWidths=[W*0.5 - 2, W*0.5 - 2])
        style_cmds = [
            ("BACKGROUND",    (0,0),(0,0), C_BIO),
            ("BACKGROUND",    (1,0),(1,0), C_PP),
            ("BOX",           (0,0),(-1,-1), 0.8, colors.HexColor("#aaaaaa")),
            ("INNERGRID",     (0,0),(-1,-1), 0.3, colors.HexColor("#dddddd")),
            ("VALIGN",        (0,0),(-1,-1), "TOP"),
            ("TOPPADDING",    (0,0),(-1,-1), 4),
            ("BOTTOMPADDING", (0,0),(-1,-1), 4),
            ("LEFTPADDING",   (0,0),(-1,-1), 6),
            ("RIGHTPADDING",  (0,0),(-1,-1), 6),
        ]
        for i in range(1, len(bio_rows)):
            if i % 2 == 1:
                style_cmds.append(("BACKGROUND", (0,i),(0,i), C_BIO_LT))
                style_cmds.append(("BACKGROUND", (1,i),(1,i), C_PP_LT))
            else:
                style_cmds.append(("BACKGROUND", (0,i),(0,i), C_WHITE))
                style_cmds.append(("BACKGROUND", (1,i),(1,i), C_WHITE))
        inner.setStyle(TableStyle(style_cmds))

        day_elements.append(inner)

        # Tip
        day_elements.append(Paragraph(f"★ {sess['tip']}", sTip))
        day_elements.append(Spacer(1, 4))

    day_elements.append(Spacer(1, 8))
    elements.append(KeepTogether(day_elements[:4]))   # keep header + first block together
    elements.extend(day_elements[4:])

# ── EXAM TIPS BOX ────────────────────────────────────────────────────────────
elements.append(HRFlowable(width="100%", thickness=1.5, color=C_GOLD, spaceAfter=6))
elements.append(Paragraph("EXAM DAY STRATEGY", PS("ets", fontSize=13, textColor=C_GOLD,
                                                    fontName="Helvetica-Bold", alignment=TA_CENTER, spaceAfter=6)))

tips_data = [
    [Paragraph("<b>Write-up (20 marks)</b>", PS("tw", fontSize=9, fontName="Helvetica-Bold", textColor=C_BIO)),
     Paragraph("• Neat headings: Aim, Principle, Apparatus, Procedure, Observation, Result, Conclusion\n"
               "• Write in advance; leave space for observations\n"
               "• Diagrams should be clean and labelled", sBody)],
    [Paragraph("<b>Practical Performance (40 marks)</b>", PS("tp", fontSize=9, fontName="Helvetica-Bold", textColor=C_PP)),
     Paragraph("• Follow steps calmly; do not rush\n"
               "• Handle reagents safely; label everything\n"
               "• Record observations honestly", sBody)],
    [Paragraph("<b>Viva (40 marks)</b>", PS("tv", fontSize=9, fontName="Helvetica-Bold", textColor=C_DARK)),
     Paragraph("• Speak confidently; use scientific terminology\n"
               "• If unsure, say what you know and link to related concepts\n"
               "• High-yield topics: Michaelis-Menten, ATP yield, emulsification, reaction kinetics", sBody)],
]
tips_table = Table(tips_data, colWidths=[W*0.28, W*0.72])
tips_table.setStyle(TableStyle([
    ("BOX",           (0,0),(-1,-1), 1, C_DARK),
    ("INNERGRID",     (0,0),(-1,-1), 0.5, colors.HexColor("#cccccc")),
    ("BACKGROUND",    (0,0),(0,0), C_BIO_LT),
    ("BACKGROUND",    (0,1),(0,1), C_PP_LT),
    ("BACKGROUND",    (0,2),(0,2), C_HEAD_BG),
    ("VALIGN",        (0,0),(-1,-1), "TOP"),
    ("TOPPADDING",    (0,0),(-1,-1), 6),
    ("BOTTOMPADDING", (0,0),(-1,-1), 6),
    ("LEFTPADDING",   (0,0),(-1,-1), 8),
]))
elements.append(tips_table)
elements.append(Spacer(1, 12))

# ── FOOTER ───────────────────────────────────────────────────────────────────
elements.append(HRFlowable(width="100%", thickness=1, color=C_DARK, spaceAfter=4))
elements.append(Paragraph(
    "Prepared for Ramzan Hafeez | Akhtar Saeed College of Pharmacy, Canal Campus | Punjab University Lahore",
    sFooter))
elements.append(Paragraph(
    "Biochemistry Exam: 19-06-2026   |   Physical Pharmacy Exam: 20-06-2026   |   Best of Luck!",
    PS("fl2", fontSize=8.5, textColor=C_GOLD, fontName="Helvetica-Bold", alignment=TA_CENTER)
))

# ── BUILD ─────────────────────────────────────────────────────────────────────
doc.build(elements)
print(f"PDF saved: {OUTPUT}")