//! Text System Demo - Demonstrates cell(), multiCell(), alignment, etc.

const std = @import("std");
const pdf = @import("zpdf");

pub fn main() !void {
    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
    defer _ = gpa.deinit();
    const allocator = gpa.allocator();

    std.debug.print("zpdf - Text System Demo\n", .{});

    var doc = pdf.Pdf.init(allocator, .{});
    defer doc.deinit();

    doc.setTitle("Text System Demo");
    doc.setAuthor("zpdf");

    var page = try doc.addPage(.{});

    // Set initial position at top of page with margins
    page.setMargins(50, 50, 50);
    page.setXY(50, 800);

    // Title
    try page.setFont(.helvetica_bold, 24);
    page.setFillColor(pdf.Color.rgb(41, 98, 255));
    try page.cell(0, 30, "Text System Demo", pdf.Border.none, .center, false);
    page.ln(35);

    // Section 1: Basic cells
    try page.setFont(.helvetica_bold, 14);
    page.setFillColor(pdf.Color.black);
    try page.cell(0, 20, "1. Basic Cells", pdf.Border.none, .left, false);
    page.ln(25);

    try page.setFont(.helvetica, 12);

    // Row of cells with different alignments
    page.setFillColor(pdf.Color.rgb(230, 230, 230));
    try page.cell(150, 20, "Left aligned", pdf.Border.all, .left, true);
    try page.cell(150, 20, "Center", pdf.Border.all, .center, true);
    try page.cell(150, 20, "Right aligned", pdf.Border.all, .right, true);
    page.ln(25);

    // Section 2: Colored cells
    try page.setFont(.helvetica_bold, 14);
    page.setFillColor(pdf.Color.black);
    try page.cell(0, 20, "2. Colored Cells", pdf.Border.none, .left, false);
    page.ln(25);

    try page.setFont(.helvetica, 12);

    page.setFillColor(pdf.Color.rgb(255, 200, 200));
    try page.cell(100, 20, "Red", pdf.Border.all, .center, true);

    page.setFillColor(pdf.Color.rgb(200, 255, 200));
    try page.cell(100, 20, "Green", pdf.Border.all, .center, true);

    page.setFillColor(pdf.Color.rgb(200, 200, 255));
    try page.cell(100, 20, "Blue", pdf.Border.all, .center, true);

    page.setFillColor(pdf.Color.rgb(255, 255, 200));
    try page.cell(100, 20, "Yellow", pdf.Border.all, .center, true);
    page.ln(30);

    // Section 3: MultiCell with word wrap
    try page.setFont(.helvetica_bold, 14);
    page.setFillColor(pdf.Color.black);
    try page.cell(0, 20, "3. MultiCell with Word Wrap", pdf.Border.none, .left, false);
    page.ln(25);

    try page.setFont(.helvetica, 11);
    page.setFillColor(pdf.Color.rgb(245, 245, 245));

    const long_text =
        \\This is a demonstration of the multiCell function in zpdf.
        \\It automatically wraps text to fit within the specified width.
        \\
        \\You can include explicit line breaks using backslash-n, and the
        \\text will flow naturally within the cell boundaries. This is
        \\useful for paragraphs, descriptions, and any longer text content.
    ;

    try page.multiCell(450, null, long_text, pdf.Border.all, .left, true);
    page.ln(10);

    // Section 4: Table-like structure
    try page.setFont(.helvetica_bold, 14);
    page.setFillColor(pdf.Color.black);
    try page.cell(0, 20, "4. Table Structure", pdf.Border.none, .left, false);
    page.ln(25);

    // Table header
    try page.setFont(.helvetica_bold, 11);
    page.setFillColor(pdf.Color.rgb(41, 98, 255));
    page.setTextColor(pdf.Color.white);
    try page.cell(150, 20, "Product", pdf.Border.all, .center, true);
    try page.cell(100, 20, "Quantity", pdf.Border.all, .center, true);
    try page.cell(100, 20, "Price", pdf.Border.all, .center, true);
    try page.cell(100, 20, "Total", pdf.Border.all, .center, true);
    page.ln(null);

    // Table rows
    try page.setFont(.helvetica, 11);
    page.setTextColor(pdf.Color.black);

    const products = [_]struct { name: []const u8, qty: []const u8, price: []const u8, total: []const u8 }{
        .{ .name = "Widget A", .qty = "10", .price = "5.00", .total = "50.00" },
        .{ .name = "Widget B", .qty = "5", .price = "12.50", .total = "62.50" },
        .{ .name = "Widget C", .qty = "3", .price = "25.00", .total = "75.00" },
    };

    for (products, 0..) |product, i| {
        if (i % 2 == 0) {
            page.setFillColor(pdf.Color.white);
        } else {
            page.setFillColor(pdf.Color.rgb(245, 245, 245));
        }

        try page.cell(150, 18, product.name, pdf.Border.all, .left, true);
        try page.cell(100, 18, product.qty, pdf.Border.all, .center, true);
        try page.cell(100, 18, product.price, pdf.Border.all, .right, true);
        try page.cell(100, 18, product.total, pdf.Border.all, .right, true);
        page.ln(null);
    }

    // Total row
    try page.setFont(.helvetica_bold, 11);
    page.setFillColor(pdf.Color.rgb(230, 230, 230));
    try page.cell(350, 20, "TOTAL", pdf.Border.all, .right, true);
    try page.cell(100, 20, "187.50", pdf.Border.all, .right, true);
    page.ln(30);

    // Section 5: Different fonts
    try page.setFont(.helvetica_bold, 14);
    page.setFillColor(pdf.Color.black);
    try page.cell(0, 20, "5. Font Showcase", pdf.Border.none, .left, false);
    page.ln(25);

    const fonts = [_]pdf.Font{
        .helvetica,
        .helvetica_bold,
        .helvetica_oblique,
        .times_roman,
        .times_bold,
        .times_italic,
        .courier,
        .courier_bold,
    };

    const font_names = [_][]const u8{
        "Helvetica",
        "Helvetica Bold",
        "Helvetica Oblique",
        "Times Roman",
        "Times Bold",
        "Times Italic",
        "Courier",
        "Courier Bold",
    };

    for (fonts, 0..) |font, i| {
        try page.setFont(font, 11);
        page.setFillColor(pdf.Color.black);
        try page.cell(200, 16, font_names[i], pdf.Border.none, .left, false);
        page.ln(null);
    }

    // Footer
    page.setXY(50, 50);
    try page.setFont(.helvetica, 9);
    page.setFillColor(pdf.Color.medium_gray);
    try page.cell(0, 15, "Generated with zpdf - Pure Zig PDF Library", pdf.Border.none, .center, false);

    // Save
    const filename = "text_demo.pdf";
    try doc.save(filename);

    std.debug.print("Created: {s}\n", .{filename});
    std.debug.print("Done!\n", .{});
}