package tui

import (
    "testing"

    tea "charm.land/bubbletea/v2"
)

func TestMouseClick_EmptyEntries(t *testing.T) {
    m := newTestModel(t)
    m.toolEntryRows = make(map[int]int)

    // Should not panic with no entries.
    m.handleMouseClick(5, 10)
}

func TestMouseClick_ToggleTool(t *testing.T) {
    m := newTestModel(t)
    m.toolEntries = []ToolEntry{
        {Name: "test", Status: ToolStatusDone, Collapsed: true},
    }
    m.toolEntryRows = map[int]int{0: 5}

    // Click at Y that maps to row 5 (header height=3, viewport offset=0).
    m.handleMouseClick(5, 8) // 8 - 3 + 0 = 5 → matches entry 0

    if m.toolEntries[0].Collapsed {
        t.Error("clicking tool entry should toggle collapsed state")
    }
}

func TestMouseClick_OutsideToolEntries(t *testing.T) {
    m := newTestModel(t)
    m.toolEntries = []ToolEntry{
        {Name: "test", Status: ToolStatusDone, Collapsed: true},
    }
    m.toolEntryRows = map[int]int{0: 5}

    // Click at a position that doesn't match any tool entry.
    m.handleMouseClick(5, 50)

    if !m.toolEntries[0].Collapsed {
        t.Error("clicking outside should not toggle collapsed state")
    }
}

func TestMouseWheel_SetsScrollFlag(t *testing.T) {
    m := newTestModel(t)
    m.anchorActive = true
    // Add enough content so the viewport is scrollable and not at bottom after scroll up.
    var longContent string
    for i := 0; i < 100; i++ {
        longContent += "line\n"
    }
    m.viewport.SetContent(longContent)
    m.viewport.GotoBottom()

    updated, _ := m.Update(tea.MouseWheelMsg{X: 0, Y: 0, Button: tea.MouseWheelUp})
    m = updated.(*Model)

    if m.anchorActive {
        t.Error("scroll up should disable anchorActive flag")
    }
    if !m.userScrolledUp {
        t.Error("scroll up should set userScrolledUp flag")
    }
}

func TestMouseWheel_ResetsAtBottom(t *testing.T) {
    m := newTestModel(t)
    m.anchorActive = false
    m.userScrolledUp = true
    // With no content, viewport is at bottom, so scrolling should reset the flag.
    updated, _ := m.Update(tea.MouseWheelMsg{X: 0, Y: 0, Button: tea.MouseWheelDown})
    m = updated.(*Model)

    if m.anchorActive {
        // At bottom with minimal content, anchor should be active
    }
}

func TestMouseWheel_NilToolRows(t *testing.T) {
    m := newTestModel(t)
    m.toolEntryRows = nil

    // Should not panic with nil toolEntryRows.
    m.handleMouseClick(5, 10)
}