//! AdvancedTable Widget - Schema-driven data table
//!
//! A full-featured table widget with:
//! - Schema-driven configuration (TableSchema + ColumnDef)
//! - Excel-style cell editing with overlay
//! - Auto-CRUD (automatic CREATE/UPDATE/DELETE detection)
//! - Keyboard navigation (arrows, Tab, Enter, Escape)
//! - Column sorting (click header)
//! - Row operations (Ctrl+N/A/B, Ctrl+arrows)
//! - Visual state indicators (normal, modified, new, deleted, error)
//! - Lookup & auto-fill for related data
//!
//! This module re-exports types from the advanced_table/ subdirectory.

const std = @import("std");
const Context = @import("../../core/context.zig").Context;
const Command = @import("../../core/command.zig");
const Layout = @import("../../core/layout.zig");
const Style = @import("../../core/style.zig");
const table_core = @import("../table_core/table_core.zig");

// Import submodules
const drawing = @import("drawing.zig");
const input = @import("input.zig");
const helpers = @import("helpers.zig");
const sorting = @import("sorting.zig");

// Re-export types
pub const types = @import("types.zig");
pub const CellValue = types.CellValue;
pub const ColumnType = types.ColumnType;
pub const RowState = types.RowState;
pub const RowLockState = types.RowLockState;
pub const SortDirection = types.SortDirection;
pub const CRUDAction = types.CRUDAction;
pub const ValidationResult = types.ValidationResult;
pub const TableColors = types.TableColors;
pub const BasicColors = types.BasicColors;
pub const TableConfig = types.TableConfig;
pub const Row = types.Row;

// Re-export schema
pub const schema = @import("schema.zig");
pub const ColumnDef = schema.ColumnDef;
pub const ColumnAlign = schema.ColumnAlign;
pub const AutoFillMapping = schema.AutoFillMapping;
pub const SelectOption = schema.SelectOption;
pub const TableSchema = schema.TableSchema;
pub const DataStore = schema.DataStore;

// Re-export state
pub const state = @import("state.zig");
pub const AdvancedTableState = state.AdvancedTableState;
pub const AdvancedTableResult = state.AdvancedTableResult;

// Re-export datasource
pub const datasource = @import("datasource.zig");
pub const MemoryDataSource = datasource.MemoryDataSource;

// Re-export table_core types
pub const NavigateDirection = table_core.NavigateDirection;

// Re-export helpers for external use
pub const blendColor = helpers.blendColor;
pub const parseValue = helpers.parseValue;
pub const startsWithIgnoreCase = sorting.startsWithIgnoreCase;

// =============================================================================
// Public API
// =============================================================================

/// Draw an AdvancedTable with default layout
pub fn advancedTable(
    ctx: *Context,
    table_state: *AdvancedTableState,
    table_schema: *const TableSchema,
) AdvancedTableResult {
    return advancedTableEx(ctx, table_state, table_schema, null);
}

/// Draw an AdvancedTable with custom colors
pub fn advancedTableEx(
    ctx: *Context,
    table_state: *AdvancedTableState,
    table_schema: *const TableSchema,
    colors: ?*const TableColors,
) AdvancedTableResult {
    const bounds = ctx.layout.nextRect();
    return advancedTableRect(ctx, bounds, table_state, table_schema, colors);
}

/// Draw an AdvancedTable in a specific rectangle
pub fn advancedTableRect(
    ctx: *Context,
    bounds: Layout.Rect,
    table_state: *AdvancedTableState,
    table_schema: *const TableSchema,
    custom_colors: ?*const TableColors,
) AdvancedTableResult {
    var result = AdvancedTableResult{};

    if (bounds.isEmpty() or table_schema.columns.len == 0) return result;

    // Get colors
    const default_colors = TableColors{};
    const colors = custom_colors orelse table_schema.colors orelse &default_colors;
    const config = table_schema.config;

    // Ensure valid selection if table has data (like Table widget does)
    if (table_state.getRowCount() > 0 and table_schema.columns.len > 0) {
        if (table_state.selected_row < 0) table_state.selected_row = 0;
        if (table_state.selected_col < 0) table_state.selected_col = 0;
    }

    // Generate unique ID for focus system
    const widget_id: u64 = @intFromPtr(table_state);

    // Register as focusable
    ctx.registerFocusable(widget_id);

    // Check mouse interaction
    const mouse = ctx.input.mousePos();
    const hovered = bounds.contains(mouse.x, mouse.y);
    const clicked = hovered and ctx.input.mousePressed(.left);

    if (clicked) {
        ctx.requestFocus(widget_id);
        result.clicked = true;
    }

    // Check if we have focus
    const has_focus = ctx.hasFocus(widget_id);
    table_state.nav.has_focus = has_focus;

    // Calculate dimensions
    const state_col_w: u32 = if (config.show_row_state_indicators) config.state_indicator_width else 0;
    const header_h: u32 = if (config.show_headers) config.header_height else 0;
    const content_h = bounds.h -| header_h;
    const visible_rows: usize = @intCast(content_h / config.row_height);

    // Begin clipping
    ctx.pushCommand(Command.clip(bounds.x, bounds.y, bounds.w, bounds.h));

    // Draw header
    if (config.show_headers) {
        drawing.drawHeader(ctx, bounds, table_state, table_schema, state_col_w, colors, &result);
    }

    // Calculate visible row range
    const first_visible = table_state.nav.scroll_row;
    const last_visible = @min(first_visible + visible_rows, table_state.getRowCount());

    // Manejar clicks en filas (separado del renderizado)
    input.handleRowClicks(ctx, bounds, table_state, table_schema, header_h, state_col_w, first_visible, last_visible, &result);

    // Construir ColumnRenderDefs para la función unificada
    var col_defs: [64]table_core.ColumnRenderDef = undefined;
    var col_count: usize = 0;
    for (table_schema.columns) |col| {
        if (col_count >= 64) break;
        col_defs[col_count] = .{
            .width = col.width,
            .visible = col.visible,
            .text_align = 0, // Por ahora left-align
        };
        col_count += 1;
    }

    // Crear MemoryDataSource y dibujar filas con función unificada
    var memory_ds = MemoryDataSource.init(table_state, table_schema.columns);
    const data_src = memory_ds.toDataSource();

    // Z-Design: Pintar fondo del área de contenido ANTES de las filas
    // Esto asegura que tablas vacías o con pocas filas no muestren negro
    ctx.pushCommand(Command.rect(
        bounds.x,
        bounds.y + @as(i32, @intCast(header_h)),
        bounds.w,
        content_h,
        colors.row_normal,
    ));

    // Construir RowRenderColors manualmente (los dos TableColors son tipos diferentes)
    const render_colors = table_core.RowRenderColors{
        .row_normal = colors.row_normal,
        .row_alternate = colors.row_alternate,
        .selected_row = colors.selected_row,
        .selected_row_unfocus = colors.selected_row_unfocus,
        .selected_cell = colors.selected_cell,
        .selected_cell_unfocus = Style.Color.rgb(80, 80, 90), // Default similar a table_core
        .text_normal = colors.text_normal,
        .text_selected = colors.text_selected,
        .border = colors.border,
        .state_modified = colors.state_modified,
        .state_new = colors.state_new,
        .state_deleted = colors.state_deleted,
        .state_error = colors.state_error,
    };

    var cell_buffer: [256]u8 = undefined;
    _ = table_core.drawRowsWithDataSource(ctx, data_src, .{
        .bounds_x = bounds.x,
        .bounds_y = bounds.y + @as(i32, @intCast(header_h)),
        .bounds_w = bounds.w,
        .row_height = config.row_height,
        .first_row = first_visible,
        .last_row = last_visible,
        .has_focus = has_focus,
        .selected_row = table_state.selected_row,
        .active_col = @intCast(@max(0, table_state.selected_col)),
        .colors = render_colors,
        .columns = col_defs[0..col_count],
        .state_indicator_width = state_col_w,
        .apply_state_colors = true,
        .draw_row_borders = true,
        .alternating_rows = config.alternating_rows,
        .edit_buffer = &table_state.row_edit_buffer,
    }, &cell_buffer);

    // End clipping
    ctx.pushCommand(Command.clipEnd());

    // Draw focus ring (outside clip)
    if (has_focus) {
        if (Style.isFancy()) {
            ctx.pushCommand(Command.focusRing(bounds.x, bounds.y, bounds.w, bounds.h, 4));
        } else {
            ctx.pushCommand(Command.rectOutline(
                bounds.x - 1,
                bounds.y - 1,
                bounds.w + 2,
                bounds.h + 2,
                colors.focus_ring,
            ));
        }
    }

    // Draw scrollbar if needed
    if (table_state.getRowCount() > visible_rows) {
        drawing.drawScrollbar(ctx, bounds, table_state, visible_rows, config, colors);
    }

    // Handle keyboard
    if (has_focus) {
        if (table_state.isEditing()) {
            // Handle editing keyboard
            input.handleEditingKeyboard(ctx, table_state, table_schema, &result);

            // Draw editing overlay
            drawing.drawEditingOverlay(ctx, bounds, table_state, table_schema, header_h, state_col_w, colors);
        } else if (config.keyboard_nav) {
            // Handle navigation keyboard
            input.handleKeyboard(ctx, table_state, table_schema, visible_rows, &result);
        }
    }

    // Ensure selection is visible
    helpers.ensureSelectionVisible(table_state, visible_rows);

    // Auto-CRUD detection (when row changes)
    if (config.auto_crud_enabled and result.selection_changed and table_state.rowChanged()) {
        result.crud_action = helpers.detectCRUDAction(table_state, table_schema);

        // Capture snapshot of new row
        if (table_state.selected_row >= 0) {
            table_state.captureSnapshot(@intCast(table_state.selected_row)) catch {};
        }
    }

    // Phase 8: Invoke callbacks
    helpers.invokeCallbacks(ctx, table_state, table_schema, &result);

    return result;
}

// =============================================================================
// Tests
// =============================================================================

test "AdvancedTable basic rendering" {
    var ctx = try Context.init(std.testing.allocator, 800, 600);
    defer ctx.deinit();

    var table_state = AdvancedTableState.init(std.testing.allocator);
    defer table_state.deinit();

    const columns = [_]ColumnDef{
        .{ .name = "id", .title = "ID", .width = 50, .editable = false },
        .{ .name = "name", .title = "Name", .width = 150 },
        .{ .name = "value", .title = "Value", .width = 100 },
    };

    const table_schema = TableSchema{
        .table_name = "test",
        .columns = &columns,
    };

    ctx.beginFrame();
    ctx.layout.row_height = 200;

    _ = advancedTable(&ctx, &table_state, &table_schema);

    // Should generate commands
    try std.testing.expect(ctx.commands.items.len > 0);

    ctx.endFrame();
}

test "blendColor" {
    const white = Style.Color.rgb(255, 255, 255);
    const black = Style.Color.rgb(0, 0, 0);

    const gray = blendColor(white, black, 0.5);
    try std.testing.expectEqual(@as(u8, 127), gray.r);
    try std.testing.expectEqual(@as(u8, 127), gray.g);
    try std.testing.expectEqual(@as(u8, 127), gray.b);
}

test "AdvancedTableResult lookup_success field" {
    var result = AdvancedTableResult{};

    // Default is null (no lookup attempted)
    try std.testing.expect(result.lookup_success == null);

    // Can be set to true (lookup found)
    result.lookup_success = true;
    try std.testing.expect(result.lookup_success.? == true);

    // Can be set to false (lookup not found)
    result.lookup_success = false;
    try std.testing.expect(result.lookup_success.? == false);
}

test "AdvancedTableState callback fields" {
    var table_state = AdvancedTableState.init(std.testing.allocator);
    defer table_state.deinit();

    // Initial state
    try std.testing.expectEqual(@as(u64, 0), table_state.last_callback_time_ms);
    try std.testing.expectEqual(@as(i32, -1), table_state.last_notified_row);

    // Can be updated
    table_state.last_callback_time_ms = 1000;
    table_state.last_notified_row = 5;

    try std.testing.expectEqual(@as(u64, 1000), table_state.last_callback_time_ms);
    try std.testing.expectEqual(@as(i32, 5), table_state.last_notified_row);
}

test "ColumnDef hasLookup" {
    // Column without lookup
    const col_no_lookup = ColumnDef{
        .name = "test",
        .title = "Test",
    };
    try std.testing.expect(!col_no_lookup.hasLookup());

    // Column with lookup enabled but no config
    const col_partial = ColumnDef{
        .name = "test",
        .title = "Test",
        .enable_lookup = true,
    };
    try std.testing.expect(!col_partial.hasLookup()); // Missing table/key

    // Column with full lookup config
    const col_full = ColumnDef{
        .name = "test",
        .title = "Test",
        .enable_lookup = true,
        .lookup_table = "other_table",
        .lookup_key_column = "id",
    };
    try std.testing.expect(col_full.hasLookup());
}

test "startsWithIgnoreCase" {
    // Basic match
    try std.testing.expect(startsWithIgnoreCase("Hello World", "Hello"));
    try std.testing.expect(startsWithIgnoreCase("Hello World", "hello"));
    try std.testing.expect(startsWithIgnoreCase("hello world", "HELLO"));

    // Empty needle matches everything
    try std.testing.expect(startsWithIgnoreCase("anything", ""));

    // Non-match
    try std.testing.expect(!startsWithIgnoreCase("Hello", "World"));
    try std.testing.expect(!startsWithIgnoreCase("Hi", "Hello"));

    // Needle longer than haystack
    try std.testing.expect(!startsWithIgnoreCase("Hi", "Hello World"));
}