package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"slices"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/tidwall/pretty"
)

func ApiRun(c *gin.Context) {
	cfg.Run(true)
	c.JSON(http.StatusOK, gin.H{
		"message": "done",
	})
}

func ApiSnapshotAdd(c *gin.Context) {
	if app, ok := cfg.apps[c.Param("app")]; ok {
		schedule := c.Param("schedule")
		if _, ok := app.schedule[schedule]; ok {
			if err := app.RunStandaloneSchedule(schedule); err != nil {
				c.JSON(http.StatusInternalServerError, gin.H{
					"message": "error",
					"error":   fmt.Sprint(err),
				})
			} else {
				c.JSON(http.StatusOK, gin.H{
					"message": "done",
				})
			}
		} else {
			c.JSON(http.StatusInternalServerError, gin.H{
				"message": "error",
				"error":   "no schedule found",
			})
		}
	} else {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "no app found",
		})
	}
}

func ApiSnapshotDel(c *gin.Context) {
	c.JSON(http.StatusInternalServerError, gin.H{
		"message": "error",
		"error":   "not implemented",
	})
}

func ApiSnapshotList(c *gin.Context) {
	if app, ok := cfg.apps[c.Param("app")]; ok {
		if snapshots, err := app.Snapshots(); err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{
				"message": "error",
				"error":   fmt.Sprint(err),
			})
		} else {
			c.JSON(http.StatusOK, gin.H{
				"message":   "done",
				"snapshots": snapshots,
			})
		}
	} else {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "no app found",
		})
	}
}

// FIXME
func ApiScheduleAdd(c *gin.Context) {
	c.JSON(http.StatusInternalServerError, gin.H{
		"message": "error",
		"error":   "not implemented",
	})
}

// FIXME
func ApiScheduleDel(c *gin.Context) {
	c.JSON(http.StatusInternalServerError, gin.H{
		"message": "error",
		"error":   "not implemented",
	})
}

// FIXME
func ApiScheduleList(c *gin.Context) {
	c.JSON(http.StatusInternalServerError, gin.H{
		"message": "error",
		"error":   "not implemented",
	})
}

func ApiRunApp(c *gin.Context) {
	if app, ok := cfg.apps[c.Param("app")]; ok {
		if err := app.RunStandaloneTime(time.Now()); err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{
				"message": "error",
				"error":   fmt.Sprint(err),
			})
		} else {
			c.JSON(http.StatusOK, gin.H{
				"message": "done",
			})
		}
	} else {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "no app found",
		})
	}
}

func ApiSave(c *gin.Context) {
	if err := cfg.Save(true); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
	} else {
		c.JSON(http.StatusOK, gin.H{
			"message": "done",
		})
	}
}

func ApiConfig(c *gin.Context) {
	if b, err := cfg.Pretty(true); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
	} else {
		c.Data(http.StatusOK, "application/json", b)
	}
}

func ApiConfigApp(c *gin.Context) {
	name := c.Param("app")
	found := false

	CfgLock()
	defer CfgUnlock()

	for _, app := range cfg.Apps {
		if app.Name == name {
			found = true
			if b, err := app.Pretty(false); err != nil {
				c.JSON(http.StatusInternalServerError, gin.H{
					"message": "error",
					"error":   fmt.Sprint(err),
				})
			} else {
				c.Data(http.StatusOK, "application/json", b)
			}
		}
	}
	if !found {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "no app found",
		})
	}
}

func ApiAppList(c *gin.Context) {
	list := make([]string, 0)

	CfgLock()
	defer CfgUnlock()

	for _, app := range cfg.Apps {
		list = append(list, app.Name)
	}

	slices.Sort(list)

	b, err := json.Marshal(list)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}
	c.Data(http.StatusOK, "application/json", pretty.PrettyOptions(b, &pretty.Options{Indent: "        "}))
}

func ApiListSchedule(c *gin.Context) {
	name := c.Param("schedule")
	list := make([]string, 0)

	CfgLock()
	defer CfgUnlock()

	for _, app := range cfg.Apps {
		for _, sched := range app.Schedule {
			if sched == name && !slices.Contains(list, app.Name) {
				list = append(list, app.Name)
			}
		}
	}

	slices.Sort(list)

	b, err := json.Marshal(list)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}
	c.Data(http.StatusOK, "application/json", pretty.PrettyOptions(b, &pretty.Options{Indent: "        "}))
}

func ApiAppAdd(c *gin.Context) {
	name := c.Param("app")
	found := false

	CfgLock()
	defer CfgUnlock()

	for _, app := range cfg.Apps {
		if app.Name == name {
			found = true
		}
	}

	if found {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "app already exist",
		})
		return
	}

	app := &AppConfig{
		Name:   name,
		Active: false,
	}
	cfg.Apps = append(cfg.Apps, app)

	err := cfg.Save(false)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"message": "done",
	})
}

func ApiAppDel(c *gin.Context) {
	name := c.Param("app")
	found := false

	CfgLock()
	defer CfgUnlock()

	for id, app := range cfg.Apps {
		if app.Name == name {
			if app.Active {
				c.JSON(http.StatusInternalServerError, gin.H{
					"message": "error",
					"error":   "app still active",
				})
				return
			}
			found = true
			cfg.Apps[id] = cfg.Apps[len(cfg.Apps)-1]
			cfg.Apps = cfg.Apps[:len(cfg.Apps)-1]
		}
	}
	if !found {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "no app found",
		})
		return
	}

	err := cfg.Save(false)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"message": "done",
	})
}

func ApiAppActivate(c *gin.Context) {
	name := c.Param("app")

	CfgLock()
	defer CfgUnlock()

	for _, app := range cfg.Apps {
		if app.Name == name {
			if app.Active {
				c.JSON(http.StatusInternalServerError, gin.H{
					"message": "error",
					"error":   "app already active",
				})
				return
			}

			a, err := cfg.NewApp(app.Name, app.Sources, app.Destinations, app.Schedule, app.Before, app.After)
			if err != nil {
				c.JSON(http.StatusInternalServerError, gin.H{
					"message": "error",
					"error":   fmt.Sprint(err),
				})
				return
			}

			cfg.apps[app.Name] = a
		}
	}

	err := cfg.Save(false)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"message": "done",
	})
}

func ApiAppDeactivate(c *gin.Context) {
	name := c.Param("app")

	CfgLock()
	defer CfgUnlock()

	if _, ok := cfg.apps[name]; ok {
		delete(cfg.apps, name)
	} else {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "app is not active",
		})
		return
	}

	for _, app := range cfg.Apps {
		if app.Name == name {
			app.Active = false
		}
	}

	err := cfg.Save(false)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"message": "done",
	})
}

func ApiAppSourceList(c *gin.Context) {
	name := c.Param("app")
	found := false
	app := &AppConfig{}

	CfgLock()
	defer CfgUnlock()

	for _, a := range cfg.Apps {
		if a.Name == name {
			found = true
			app = a
		}
	}

	if !found {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "app does not exist",
		})
		return
	}

	b, err := json.Marshal(app.Sources)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}
	c.Data(http.StatusOK, "application/json", pretty.PrettyOptions(b, &pretty.Options{Indent: "        "}))
}

func ApiAppSourceAdd(c *gin.Context) {
	name := c.Param("app")
	found := false
	app := &AppConfig{}

	CfgLock()
	defer CfgUnlock()

	for _, a := range cfg.Apps {
		if a.Name == name {
			found = true
			app = a
		}
	}

	if !found {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "app does not exist",
		})
		return
	}

	src := Addr(c.Param("src"))
	if src.Box() == "" {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "source box incorrect",
		})
		return
	}

	if _, ok := cfg.box[src.Box()]; !ok {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "source box doesn't exist",
		})
		return
	}

	if src.Path() == "" {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "source path incorrect",
		})
		return
	}

	if slices.Contains(app.Sources, src.String()) {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "source already exists",
		})
		return
	}

	app.Sources = append(app.Sources, src.String())

	if app.Active {
		a, err := cfg.NewApp(app.Name, app.Sources, app.Destinations, app.Schedule, app.Before, app.After)
		if err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{
				"message": "error",
				"error":   fmt.Sprint(err),
			})
			return
		}

		cfg.apps[a.name] = a
	}

	err := cfg.Save(false)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"message": "done",
	})

}

// FIXME
func ApiAppSourceDel(c *gin.Context) {
	name := c.Param("app")
	found := false
	app := &AppConfig{}

	CfgLock()
	defer CfgUnlock()

	for _, a := range cfg.Apps {
		if a.Name == name {
			found = true
			app = a
		}
	}

	if !found {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "app does not exist",
		})
		return
	}

	src := c.Param("src")
	if !slices.Contains(app.Sources, src) {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   "source does not exist",
		})
		return
	}

	for id, s := range app.Sources {
		if s == src {
			app.Sources[id] = app.Sources[len(app.Sources)-1]
			app.Sources = app.Sources[:len(app.Sources)-1]
		}
	}

	if app.Active {
		a, err := cfg.NewApp(app.Name, app.Sources, app.Destinations, app.Schedule, app.Before, app.After)
		if err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{
				"message": "error",
				"error":   fmt.Sprint(err),
			})
			return
		}

		cfg.apps[a.name] = a
	}

	err := cfg.Save(false)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"message": "error",
			"error":   fmt.Sprint(err),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"message": "done",
	})
}