package context

import (
	"fmt"

	"github.com/jesseduffield/gocui"
	"github.com/jesseduffield/lazygit/pkg/commands/models"
	"github.com/jesseduffield/lazygit/pkg/gui/types"
	"github.com/jesseduffield/lazygit/pkg/utils"
)

type SubCommitsContext struct {
	*SubCommitsViewModel
	*ViewportListContextTrait
	*DynamicTitleBuilder
}

var _ types.IListContext = (*SubCommitsContext)(nil)

func NewSubCommitsContext(
	getModel func() []*models.Commit,
	view *gocui.View,
	getDisplayStrings func(startIdx int, length int) [][]string,

	onFocus func(...types.OnFocusOpts) error,
	onRenderToMain func(...types.OnFocusOpts) error,
	onFocusLost func() error,

	c *types.HelperCommon,
) *SubCommitsContext {
	viewModel := &SubCommitsViewModel{
		BasicViewModel: NewBasicViewModel(getModel),
		refName:        "",
	}

	return &SubCommitsContext{
		SubCommitsViewModel: viewModel,
		DynamicTitleBuilder: NewDynamicTitleBuilder(c.Tr.SubCommitsDynamicTitle),
		ViewportListContextTrait: &ViewportListContextTrait{
			ListContextTrait: &ListContextTrait{
				Context: NewSimpleContext(NewBaseContext(NewBaseContextOpts{
					ViewName:   "subCommits",
					WindowName: "branches",
					Key:        SUB_COMMITS_CONTEXT_KEY,
					Kind:       types.SIDE_CONTEXT,
					Focusable:  true,
					Transient:  true,
				}), ContextCallbackOpts{
					OnFocus:        onFocus,
					OnFocusLost:    onFocusLost,
					OnRenderToMain: onRenderToMain,
				}),
				list:              viewModel,
				viewTrait:         NewViewTrait(view),
				getDisplayStrings: getDisplayStrings,
				c:                 c,
			},
		},
	}
}

type SubCommitsViewModel struct {
	// name of the ref that the sub-commits are shown for
	refName string
	*BasicViewModel[*models.Commit]
}

func (self *SubCommitsViewModel) SetRefName(refName string) {
	self.refName = refName
}

func (self *SubCommitsContext) GetSelectedItemId() string {
	item := self.GetSelected()
	if item == nil {
		return ""
	}

	return item.ID()
}

func (self *SubCommitsContext) CanRebase() bool {
	return false
}

// not to be confused with the refName in the view model. This is the ref name of
// the selected commit
func (self *SubCommitsContext) GetSelectedRefName() string {
	item := self.GetSelected()

	if item == nil {
		return ""
	}

	return item.RefName()
}

func (self *SubCommitsContext) GetCommits() []*models.Commit {
	return self.getModel()
}

func (self *SubCommitsContext) Title() string {
	return fmt.Sprintf(self.c.Tr.SubCommitsDynamicTitle, utils.TruncateWithEllipsis(self.refName, 50))
}

func (self *SubCommitsContext) GetSelectedDescription() string {
	item := self.GetSelected()

	if item == nil {
		return ""
	}

	return item.Description()
}