package controller

import (
	"strings"
	"time"

	"github.com/cuigh/auxo/data"
	"github.com/cuigh/auxo/errors"
	"github.com/cuigh/auxo/net/web"
	"github.com/cuigh/auxo/util/cast"
	"github.com/cuigh/swirl/biz"
	"github.com/cuigh/swirl/model"
)

// ChartController is a controller of metric chart.
type ChartController struct {
	List          web.HandlerFunc `path:"/" name:"chart.list" authorize:"!" desc:"chart list page"`
	Query         web.HandlerFunc `path:"/query" name:"chart.query" authorize:"?" desc:"chart query"`
	New           web.HandlerFunc `path:"/new" name:"chart.new" authorize:"!" desc:"new chart page"`
	Create        web.HandlerFunc `path:"/new" method:"post" name:"chart.create" authorize:"!" desc:"create chart"`
	Detail        web.HandlerFunc `path:"/:name/detail" name:"chart.detail" authorize:"?" desc:"chart detail"`
	Edit          web.HandlerFunc `path:"/:name/edit" name:"chart.edit" authorize:"!" desc:"edit chart page"`
	Delete        web.HandlerFunc `path:"/:name/delete" method:"post" name:"chart.delete" authorize:"!" desc:"delete chart"`
	Update        web.HandlerFunc `path:"/:name/edit" method:"post" name:"chart.update" authorize:"!" desc:"update chart"`
	Data          web.HandlerFunc `path:"/data" name:"chart.data" authorize:"?" desc:"fetch chart datas"`
	SaveDashboard web.HandlerFunc `path:"/save_dashboard" method:"post" name:"chart.save_dashboard" authorize:"!" desc:"save dashboard"`
}

// Chart creates an instance of RoleController
func Chart() (c *ChartController) {
	return &ChartController{
		List:          chartList,
		Query:         chartQuery,
		New:           chartNew,
		Create:        chartCreate,
		Detail:        chartDetail,
		Edit:          chartEdit,
		Update:        chartUpdate,
		Delete:        chartDelete,
		Data:          chartData,
		SaveDashboard: chartSaveDashboard,
	}
}

func chartList(ctx web.Context) error {
	charts, err := biz.Chart.List()
	if err != nil {
		return err
	}

	m := newModel(ctx).Set("Charts", charts)
	return ctx.Render("system/chart/list", m)
}

func chartDetail(ctx web.Context) error {
	name := ctx.P("name")
	chart, err := biz.Chart.Get(name)
	if err != nil {
		return err
	}

	return ctx.JSON(chart, "  ")
}

func chartQuery(ctx web.Context) error {
	charts, err := biz.Chart.List()
	if err != nil {
		return err
	}

	dashboard := ctx.Q("dashboard")
	var list []*model.Chart
	for _, c := range charts {
		if c.Dashboard == dashboard || c.Dashboard == "" {
			list = append(list, c)
		}
	}
	return ctx.JSON(list)
}

func chartNew(ctx web.Context) error {
	m := newModel(ctx).Set("Chart", &model.Chart{
		Width:     12,
		Height:    200,
		Type:      "line",
		Dashboard: "service",
	})
	return ctx.Render("system/chart/edit", m)
}

func chartCreate(ctx web.Context) error {
	chart := &model.Chart{}
	err := ctx.Bind(chart, true)
	if err == nil {
		err = biz.Chart.Create(chart, ctx.User())
	}
	return ajaxResult(ctx, err)
}

func chartEdit(ctx web.Context) error {
	name := ctx.P("name")
	chart, err := biz.Chart.Get(name)
	if err != nil {
		return err
	}
	if chart == nil {
		return web.ErrNotFound
	}

	m := newModel(ctx).Set("Chart", chart)
	return ctx.Render("system/chart/edit", m)
}

func chartUpdate(ctx web.Context) error {
	chart := &model.Chart{}
	err := ctx.Bind(chart)
	if err == nil {
		var metrics []model.ChartMetric
		for _, m := range chart.Metrics {
			if m.Query != "" {
				metrics = append(metrics, m)
			}
		}
		chart.Metrics = metrics
		err = biz.Chart.Update(chart, ctx.User())
	}
	return ajaxResult(ctx, err)
}

func chartDelete(ctx web.Context) error {
	name := ctx.P("name")
	err := biz.Chart.Delete(name, ctx.User())
	return ajaxResult(ctx, err)
}

func chartData(ctx web.Context) error {
	period := time.Duration(cast.ToInt64(ctx.Q("period"), 60)) * time.Minute
	if v := ctx.Q("charts"); v != "" {
		names := strings.Split(v, ",")
		key := ctx.Q("key")
		datas, err := biz.Chart.FetchDatas(key, names, period)
		if err != nil {
			return err
		}
		return ctx.JSON(datas)
	}
	return ctx.JSON(data.Map{})
}

func chartSaveDashboard(ctx web.Context) error {
	dashboard := &model.ChartDashboard{}
	err := ctx.Bind(dashboard)
	if err != nil {
		return err
	}

	switch dashboard.Name {
	case "home", "service":
		err = biz.Chart.UpdateDashboard(dashboard, ctx.User())
	default:
		err = errors.New("unknown dashboard: " + dashboard.Name)
	}
	return ajaxResult(ctx, err)
}