//Calendar implementation for the HTWK Leipzig timetable. Evaluation and display of the individual dates in iCal format.
//Copyright (C) 2024 HTWKalender support@htwkalender.de

//This program is free software: you can redistribute it and/or modify
//it under the terms of the GNU Affero General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.

//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Affero General Public License for more details.

//You should have received a copy of the GNU Affero General Public License
//along with this program.  If not, see <https://www.gnu.org/licenses/>.

package service

import (
	"htwkalender/data-manager/model/serviceModel"
	"htwkalender/data-manager/service/course"
	"htwkalender/data-manager/service/fetch/sport"
	v1 "htwkalender/data-manager/service/fetch/v1"
	v2 "htwkalender/data-manager/service/fetch/v2"
	"htwkalender/data-manager/service/functions/time"
	"htwkalender/data-manager/service/room"
	"log/slog"
	"net/http"

	"github.com/pocketbase/pocketbase/apis"
	"github.com/pocketbase/pocketbase/core"
)

func AddRoutes(services serviceModel.Service) {

	services.App.OnServe().BindFunc(func(se *core.ServeEvent) error {
		se.Router.GET("/api/fetch/events", func(e *core.RequestEvent) error {
			savedEvents, err := v2.ParseEventsFromRemote(services.App)
			if err != nil {
				slog.Error("Failed to parse events from remote: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to parse events from remote")
			} else {
				return e.JSON(http.StatusOK, savedEvents)
			}
		}).Bind(apis.RequireSuperuserAuth())

		se.Router.GET("/api/fetch/daily/events", func(e *core.RequestEvent) error {
			clock := time.RealClock{}
			course.UpdateCourse(services, clock)
			return e.JSON(http.StatusOK, "Daily events fetched")
		}).Bind(apis.RequireSuperuserAuth())

		se.Router.GET("/api/fetch/group", func(e *core.RequestEvent) error {
			seminarGroupString := e.Request.URL.Query().Get("seminarGroup")

			if seminarGroupString == "" {
				return e.JSON(http.StatusBadRequest, "Seminar group could not be empty")
			} else {
				//find seminar group by name
				seminarGroup, err := services.CourseService.FindCourseByCourseName(seminarGroupString)
				if err != nil {
					return e.JSON(http.StatusBadRequest, "Failed to find seminar group")
				}

				events, err := services.EventService.UpdateModulesForCourse(seminarGroup)
				if err != nil {
					return e.JSON(http.StatusBadRequest, "Failed to fetch seminar group")
				}
				return e.JSON(http.StatusOK, events)
			}

		}).Bind(apis.RequireSuperuserAuth())

		se.Router.GET("/api/fetch/groups", func(e *core.RequestEvent) error {
			groups, err := v1.FetchSeminarGroups(services.App)
			if err != nil {
				slog.Error("Failed to fetch seminar groups: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to fetch seminar groups")
			} else {
				return e.JSON(http.StatusOK, groups)
			}
		}).Bind(apis.RequireSuperuserAuth())

		se.Router.GET("/api/fetch/sports", func(e *core.RequestEvent) error {
			sportEvents, err := sport.FetchAndUpdateSportEvents(services.App)
			if err != nil {
				slog.Error("Failed to fetch sport events: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to fetch sport events")
			} else {
				return e.JSON(http.StatusOK, sportEvents)
			}
		}).Bind(apis.RequireSuperuserAuth())

		se.Router.DELETE("/api/modules", func(e *core.RequestEvent) error {
			err := services.EventService.DeleteAllEvents()
			if err != nil {
				return e.JSON(http.StatusBadRequest, "Failed to delete events")
			}
			return e.JSON(http.StatusOK, "Events deleted")
		}).Bind(apis.RequireSuperuserAuth())

		se.Router.GET("/api/rooms", func(e *core.RequestEvent) error {
			rooms, err := room.GetRooms(services.App)
			if err != nil {
				return e.JSON(http.StatusBadRequest, "Failed to get rooms")
			}
			return e.JSON(http.StatusOK, rooms)
		})

		se.Router.GET("/api/schedule/day", func(e *core.RequestEvent) error {
			roomParam := e.Request.URL.Query().Get("room")
			date := e.Request.URL.Query().Get("date")
			roomSchedule, err := room.GetRoomScheduleForDay(services.App, roomParam, date)
			if err != nil {
				slog.Error("Failed to get room schedule for day: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to get room schedule for day")
			}
			return e.JSON(http.StatusOK, roomSchedule)
		})

		se.Router.GET("/api/schedule", func(e *core.RequestEvent) error {
			roomParam := e.Request.URL.Query().Get("room")
			to := e.Request.URL.Query().Get("to")
			from := e.Request.URL.Query().Get("from")
			mapped := e.Request.URL.Query().Get("mapped")
			roomSchedule, err := room.GetRoomSchedule(services.App, roomParam, from, to, mapped)
			if err != nil {
				slog.Error("Failed to get room schedule: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to get room schedule")
			}
			return e.JSON(http.StatusOK, roomSchedule)
		})

		se.Router.GET("/api/rooms/free", func(e *core.RequestEvent) error {
			from, err := time.ParseTime(e.Request.URL.Query().Get("from"))
			if err != nil {
				slog.Error("Failed to parse time: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to parse time")
			}
			to, err := time.ParseTime(e.Request.URL.Query().Get("to"))
			if err != nil {
				slog.Error("Failed to parse time: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to parse time")
			}
			rooms, err := room.GetFreeRooms(services.App, from, to)
			if err != nil {
				slog.Error("Failed to get free rooms: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to get free rooms")
			}
			return e.JSON(http.StatusOK, rooms)
		})

		se.Router.GET("/api/course/modules", func(e *core.RequestEvent) error {
			modules, err := services.EventService.GetModulesForCourseDistinct(
				e.Request.URL.Query().Get("course"),
				e.Request.URL.Query().Get("semester"),
			)
			if err != nil {
				slog.Error("Failed to get modules for course and semester: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to get modules for course and semester")
			}
			return e.JSON(http.StatusOK, modules)
		})

		se.Router.GET("/api/modules", func(e *core.RequestEvent) error {
			modules, err := services.EventService.GetAllModulesDistinct()
			if err != nil {
				slog.Error("Failed to get modules: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to get modules")
			}
			return e.JSON(http.StatusOK, modules)
		})

		se.Router.GET("/api/module", func(e *core.RequestEvent) error {
			requestModule := e.Request.URL.Query().Get("uuid")
			module, err := services.EventService.GetModuleByUUID(requestModule)
			if err != nil {
				slog.Error("Failed to get module: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to get module")
			}
			return e.JSON(http.StatusOK, module)
		})

		se.Router.GET("/api/courses", func(e *core.RequestEvent) error {
			semester := e.Request.URL.Query().Get("semester")
			if semester == "" {
				courses := services.CourseService.GetAllCourses()
				return e.JSON(200, courses)
			} else {
				seminarGroups := services.CourseService.GetAllCoursesForSemester(semester)
				courseStringList := make([]string, 0)
				for _, seminarGroup := range seminarGroups {
					courseStringList = append(courseStringList, seminarGroup.Course)
				}
				return e.JSON(200, courseStringList)
			}
		})

		se.Router.GET("/api/courses/events", func(e *core.RequestEvent) error {
			semester := e.Request.URL.Query().Get("semester")
			courses, err := services.CourseService.GetAllCoursesForSemesterWithEvents(semester)
			if err != nil {
				slog.Error("Failed to get courses for semester with events: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to get courses for semester with events")
			} else {
				return e.JSON(http.StatusOK, courses)
			}
		})

		se.Router.GET("/api/events/types", func(e *core.RequestEvent) error {
			eventTypes, err := services.EventService.GetEventTypes()
			if err != nil {
				slog.Error("Failed to get event types", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to get event types")
			} else {
				return e.JSON(http.StatusOK, eventTypes)
			}
		})

		se.Router.DELETE("/api/events", func(e *core.RequestEvent) error {
			err := services.EventService.DeleteAllEventsByCourseAndSemester(
				e.Request.URL.Query().Get("course"),
				e.Request.URL.Query().Get("semester"),
			)
			if err != nil {
				slog.Error("Failed to delete events: ", "error", err)
				return e.JSON(http.StatusBadRequest, "Failed to delete events")
			} else {
				return e.JSON(http.StatusOK, "Events deleted")
			}
		}).Bind(apis.RequireSuperuserAuth())

		addFeedRoutes(se, services.App)

		return se.Next()
	})
}