package hhc_mangekyo

import (
	"fmt"
	"git.swzry.com/zry/go-hhc-cli/hhc_ast"
	"git.swzry.com/zry/go-hhc-cli/hhc_telws"
	"git.swzry.com/zry/go-hhc-cli/hhc_validators"
	"git.swzry.com/zry/go-hhc-cli/hhccli"
	"strconv"
)

type MangekyoUserView struct {
	treeroot *hhc_ast.SyntaxDefinitionTreeRoot
	ctx      *hhc_telws.TelwsSessionContext
	cvps     []MangekyoCustomViewPortalCommandDefine
	cli      *hhccli.TerminalInteractive
}

func NewMangeKyoUserView(
	ctx *hhc_telws.TelwsSessionContext,
	cvps []MangekyoCustomViewPortalCommandDefine,
	cli *hhccli.TerminalInteractive,
) *MangekyoUserView {
	uv := &MangekyoUserView{
		ctx:  ctx,
		cvps: cvps,
		cli:  cli,
	}
	uv.makeTree()
	return uv
}

func (uv *MangekyoUserView) GetSDTRoot() *hhc_ast.SyntaxDefinitionTreeRoot {
	return uv.treeroot
}

func (uv *MangekyoUserView) makeTree() {
	uv.treeroot = &hhc_ast.SyntaxDefinitionTreeRoot{}
	for _, v := range uv.cvps {
		cmd := &hhc_ast.SDTNode_Command{
			Name:        v.CommandName,
			Description: v.Description,
		}
		end := &hhc_ast.SDTNode_End{
			Exec: uv.getViewChangeExecFunc(v),
		}
		cmd.AddEnd(end)
		uv.treeroot.AddCommand(cmd)
	}
	uv.addCommands()
}

func (uv *MangekyoUserView) addCommands() {
	c_termwidth := &hhc_ast.SDTNode_Command{
		Name:        "termwidth",
		Description: "Set terminal width",
	}
	c_termwidth_arg1 := &hhc_ast.SDTNode_Argument{
		FormatDescription: "INTEGER<10-1024>",
		Description:       "Terminal width",
		Validator: hhc_validators.RangedInteger{
			Min: 10,
			Max: 1024,
		}.Validate,
	}
	c_termwidth_arg1_end := &hhc_ast.SDTNode_End{
		Exec: uv.execTermwidth,
	}
	c_termwidth_arg1.AddEnd(c_termwidth_arg1_end)
	c_termwidth.AddValArgument(c_termwidth_arg1)
	uv.treeroot.AddCommand(c_termwidth)
	c_disp := &hhc_ast.SDTNode_Command{
		Name:        "disp",
		Description: "Display information",
	}
	c_disp_termwidth := &hhc_ast.SDTNode_Command{
		Name:        "termwidth",
		Description: "Display terminal width",
	}
	c_disp_termwidth_end := &hhc_ast.SDTNode_End{
		Exec: uv.execDispTermwidth,
	}
	c_disp_termwidth.AddEnd(c_disp_termwidth_end)
	c_disp.AddSubCommand(c_disp_termwidth)
	uv.treeroot.AddCommand(c_disp)
	c_exit := &hhc_ast.SDTNode_Command{
		Name:        "exit",
		Description: "Disconnect this session.",
	}
	c_exit_end := &hhc_ast.SDTNode_End{
		Exec: uv.execExit,
	}
	c_exit.AddEnd(c_exit_end)
	uv.treeroot.AddCommand(c_exit)
}

func (uv *MangekyoUserView) execDispTermwidth(ctx *hhc_ast.ExecUserContext) {
	tw := uv.cli.GetTerminalWidth()
	ctx.ResultPrintSingleLineString(fmt.Sprintf("Terminal width: %d", tw))
}

func (uv *MangekyoUserView) execTermwidth(ctx *hhc_ast.ExecUserContext) {
	v, ok := ctx.GetArgument(1)
	if !ok {
		ctx.ResultPrintSingleLineString(" % invalid argument")
		return
	}
	n, err := strconv.Atoi(v)
	if err != nil {
		ctx.ResultPrintSingleLineString(fmt.Sprintf(" %% invalid argument: %s", v))
		return
	}
	if n < 10 {
		ctx.ResultPrintSingleLineString(" % invalid argument - too small")
		return
	}
	if n > 1024 {
		ctx.ResultPrintSingleLineString(" % invalid argument - too large")
		return
	}
	uv.cli.SetTerminalWidth(n)
	ctx.ResultPrintSingleLineString(fmt.Sprintf("Terminal width set to %d.", n))
}

func (uv *MangekyoUserView) execExit(ctx *hhc_ast.ExecUserContext) {
	uv.ctx.GetConn().Close()
}

func (uv *MangekyoUserView) getViewChangeExecFunc(v MangekyoCustomViewPortalCommandDefine) func(ectx *hhc_ast.ExecUserContext) {
	return func(ectx *hhc_ast.ExecUserContext) {
		fview := v.GetViewNameFunc
		fprompt := v.GetPromptFunc
		ftitle := v.GetTitleFunc
		ectx.ChangeView(fview(uv.ctx))
		ectx.ChangePrompt(fprompt(uv.ctx))
		ectx.ChangeTitle(ftitle(uv.ctx))
	}
}