package tui

import (
	"strings"
	"testing"
	"time"

	"github.com/charmbracelet/bubbletea"

	"gitea.oblak.solutions/dimitar/gitFlow/internal/config"
	"gitea.oblak.solutions/dimitar/gitFlow/internal/presenter"
	"gitea.oblak.solutions/dimitar/gitFlow/pkg/status"
)

func newTestModel() Model {
	return newTestModelWith(status.ScanResult{
		ScannedAt: time.Now(),
		ParentDir: "/tmp/test",
		Repos: []status.RepoInfo{
			{Path: "/tmp/test/a", Name: "a", Branch: "main", Status: status.StatusClean},
			{Path: "/tmp/test/b", Name: "b", Branch: "feat/x", Status: status.StatusModified, ModifiedFiles: []string{"f.go"}},
			{Path: "/tmp/test/c", Name: "c", Status: status.StatusError, Error: "boom"},
		},
	})
}

func newTestModelWith(result status.ScanResult) Model {
	return Model{
		app:    nil,
		cfg:    &config.Config{Dir: "/tmp/test", Format: "table", Color: "auto", Theme: "dark", Workers: 4},
		opts:   presenter.Options{Color: presenter.ColorNever, Theme: presenter.ThemeDark},
		result: result,
		cursor: 0,
		first:  true,
		styles: NewStyles(presenter.Options{Theme: presenter.ThemeDark}),
	}
}

func TestModelNavigation(t *testing.T) {
	m := newTestModel()

	// Move down
	m2, _ := m.Update(tea.KeyMsg{Type: tea.KeyDown})
	if m2.(Model).cursor != 1 {
		t.Errorf("cursor = %d after down, want 1", m2.(Model).cursor)
	}
	// Move down again
	m3, _ := m2.Update(tea.KeyMsg{Type: tea.KeyDown})
	if m3.(Model).cursor != 2 {
		t.Errorf("cursor = %d after down, want 2", m3.(Model).cursor)
	}
	// At bottom: cursor stays
	m4, _ := m3.Update(tea.KeyMsg{Type: tea.KeyDown})
	if m4.(Model).cursor != 2 {
		t.Errorf("cursor = %d after down (at bottom), want 2", m4.(Model).cursor)
	}
	// Move up
	m5, _ := m4.Update(tea.KeyMsg{Type: tea.KeyUp})
	if m5.(Model).cursor != 1 {
		t.Errorf("cursor = %d after up, want 1", m5.(Model).cursor)
	}
	// At top: cursor stays
	m6, _ := m5.Update(tea.KeyMsg{Type: tea.KeyUp})
	m6, _ = m6.Update(tea.KeyMsg{Type: tea.KeyUp})
	if m6.(Model).cursor != 0 {
		t.Errorf("cursor = %d after up (at top), want 0", m6.(Model).cursor)
	}
}

func TestModelJKKeys(t *testing.T) {
	m := newTestModel()
	m2, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'j'}})
	if m2.(Model).cursor != 1 {
		t.Errorf("cursor = %d after j, want 1", m2.(Model).cursor)
	}
	m3, _ := m2.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'k'}})
	if m3.(Model).cursor != 0 {
		t.Errorf("cursor = %d after k, want 0", m3.(Model).cursor)
	}
}

func TestModelDetailToggle(t *testing.T) {
	m := newTestModel()
	if m.detail {
		t.Error("detail = true initially, want false")
	}
	m2, _ := m.Update(tea.KeyMsg{Type: tea.KeyEnter})
	if !m2.(Model).detail {
		t.Error("detail = false after Enter, want true")
	}
	m3, _ := m2.Update(tea.KeyMsg{Type: tea.KeySpace})
	if m3.(Model).detail {
		t.Error("detail = true after Space, want false")
	}
}

func TestModelHelpToggle(t *testing.T) {
	m := newTestModel()
	if m.help {
		t.Error("help = true initially, want false")
	}
	m2, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'?'}})
	if !m2.(Model).help {
		t.Error("help = false after ?, want true")
	}
}

func TestModelQuit(t *testing.T) {
	m := newTestModel()
	for _, key := range []tea.KeyType{tea.KeyCtrlC} {
		_, cmd := m.Update(tea.KeyMsg{Type: key})
		if cmd == nil {
			t.Errorf("no quit cmd for key %v", key)
			continue
		}
		// tea.Quit is a function that returns a tea.QuitMsg
		if cmd() == nil {
			t.Errorf("quit cmd produced nil msg")
		}
	}
	// 'q' quit
	_, cmd := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'q'}})
	if cmd == nil {
		t.Error("no quit cmd for 'q'")
	}
}

func TestModelViewRendersRepos(t *testing.T) {
	m := newTestModel()
	view := m.View()
	for _, want := range []string{"a", "b", "c", "feat/x", "STATUS", "BRANCH"} {
		if !strings.Contains(view, want) {
			t.Errorf("view missing %q:\n%s", want, view)
		}
	}
}

func TestModelViewShowsHelp(t *testing.T) {
	m := newTestModel()
	m.help = true
	view := m.View()
	if !strings.Contains(view, "KEYBINDINGS") {
		t.Errorf("help view missing KEYBINDINGS:\n%s", view)
	}
}

func TestModelViewShowsDetail(t *testing.T) {
	m := newTestModel()
	m.cursor = 1 // select repo 'b'
	m.detail = true
	view := m.View()
	if !strings.Contains(view, "modified:") || !strings.Contains(view, "f.go") {
		t.Errorf("detail view missing file:\n%s", view)
	}
}

func TestModelViewLoading(t *testing.T) {
	m := newTestModel()
	m.loading = true
	view := m.View()
	if !strings.Contains(view, "scanning") {
		t.Errorf("loading view missing 'scanning':\n%s", view)
	}
}

func TestModelViewEmpty(t *testing.T) {
	m := newTestModelWith(status.ScanResult{Repos: nil})
	view := m.View()
	if !strings.Contains(view, "no repositories") {
		t.Errorf("empty view missing 'no repositories':\n%s", view)
	}
}