package main

import (
	"encoding/csv"
	"fmt"
	"io"
	"net/http"
	"strconv"

	"codeberg.org/vlbeaudoin/pave/v2"
	"codeberg.org/vlbeaudoin/voki/v3"
	"github.com/gocarina/gocsv"
	"github.com/labstack/echo/v4"
)

func addRoutes(e *echo.Echo, db *PostgresClient, cfg Config) error {
	_ = db

	apiPath := "/api/v7"
	apiGroup := e.Group(apiPath)
	p := pave.New()
	if err := pave.EchoRegister[HealthGETRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodGet,
		"/health/",
		"Get API server health",
		"HealthGET", func(c echo.Context) error {
			var request, response = HealthGETRequest{}, HealthGETResponse{}
			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete HealthGET request received"
				return c.JSON(response.StatusCode(), response)
			}
			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = "ok"
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	if err := pave.EchoRegister[ProgrammesPOSTRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodPost,
		"/programme/",
		"Insert programmes",
		"ProgrammesPOST", func(c echo.Context) error {
			var request, response = ProgrammesPOSTRequest{}, ProgrammesPOSTResponse{}

			switch contentType := c.Request().Header.Get("Content-Type"); contentType {
			case "application/json":
				if err := c.Bind(&request.Data); err != nil {
					var response voki.ResponseBadRequest
					response.Message = fmt.Sprintf("parse request body: %s", err)
					return c.JSON(response.StatusCode(), response)
				}
			case "text/csv":
				body := c.Request().Body
				if body == nil {
					var response voki.ResponseBadRequest
					response.Message = "empty request body cannot be parsed"
					return c.JSON(response.StatusCode(), response)
				}
				defer body.Close()

				gocsv.SetCSVReader(func(in io.Reader) gocsv.CSVReader {
					r := csv.NewReader(in)
					r.Comma = ';'
					return r // Allows use ; as delimiter
				})

				// Parse CSV data using gocsv
				if err := gocsv.Unmarshal(body, &request.Data.Programmes); err != nil {
					var response voki.ResponseBadRequest
					response.Message = fmt.Sprintf("parse programmes from csv: %s", err)
					return c.JSON(response.StatusCode(), response)
				}
			default:
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("cannot parse body with content-type: %s", contentType)
				return c.JSON(response.StatusCode(), response)
			}

			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete ProgrammesPOST request received"
				return c.JSON(response.StatusCode(), response)
			}

			amountInserted, err := db.InsertProgrammes(request.Data.Programmes...)
			if err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("db: %s", err)
				return c.JSON(response.StatusCode(), response)
			}
			response.Data.ProgrammesInserted = amountInserted

			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = "ok"
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	if err := pave.EchoRegister[MembresPOSTRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodPost,
		"/membre/",
		"Insert membres",
		"MembresPOST", func(c echo.Context) error {
			var request, response = MembresPOSTRequest{}, MembresPOSTResponse{}

			switch contentType := c.Request().Header.Get("Content-Type"); contentType {
			case "application/json":
				if err := c.Bind(&request.Data); err != nil {
					var response voki.ResponseBadRequest
					response.Message = fmt.Sprintf("parse request body: %s", err)
					return c.JSON(response.StatusCode(), response)
				}
			case "text/csv":
				body := c.Request().Body
				if body == nil {
					var response voki.ResponseBadRequest
					response.Message = "empty request body cannot be parsed"
					return c.JSON(response.StatusCode(), response)
				}
				defer body.Close()

				gocsv.SetCSVReader(func(in io.Reader) gocsv.CSVReader {
					r := csv.NewReader(in)
					r.Comma = ';'
					return r // Allows use ; as delimiter
				})

				// Parse CSV data using gocsv
				if err := gocsv.Unmarshal(body, &request.Data.Membres); err != nil {
					var response voki.ResponseBadRequest
					response.Message = fmt.Sprintf("parse membres from csv: %s", err)
					return c.JSON(response.StatusCode(), response)
				}
			default:
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("cannot parse body with content-type: %s", contentType)
				return c.JSON(response.StatusCode(), response)
			}

			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete MembresPOST request received"
				return c.JSON(response.StatusCode(), response)
			}

			amountInserted, err := db.InsertMembres(request.Data.Membres...)
			if err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("db: %s", err)
				return c.JSON(response.StatusCode(), response)
			}
			response.Data.MembresInserted = amountInserted

			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = "ok"
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	if err := pave.EchoRegister[MembreGETRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodGet,
		"/membre/:membre_id/",
		"Get membre",
		"MembreGET", func(c echo.Context) error {
			var request, response = MembreGETRequest{}, MembreGETResponse{}

			request.Param.MembreID = c.Param("membre_id")

			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete MembreGET request received"
				return c.JSON(response.StatusCode(), response)
			}

			membre, err := db.GetMembre(request.Param.MembreID)
			if err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("db: %s", err)
				return c.JSON(response.StatusCode(), response)
			}
			response.Data.Membre = membre

			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = "ok"
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	if err := pave.EchoRegister[MembresGETRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodGet,
		"/membre/",
		"Get membres",
		"MembresGET", func(c echo.Context) (err error) {
			var request, response = MembresGETRequest{}, MembresGETResponse{}

			queryLimit := c.QueryParam("limit")
			if queryLimit != "" {
				request.Query.Limit, err = strconv.Atoi(queryLimit)
				if err != nil {
					var response voki.ResponseBadRequest
					response.Message = fmt.Sprintf("parsing limit: %s", err)
					return c.JSON(response.StatusCode(), response)
				}

			} else {
				//TODO cfg.API.DefaultLimit
				request.Query.Limit = 1000
			}

			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete MembresGET request received"
				return c.JSON(response.StatusCode(), response)
			}

			response.Data.Membres, err = db.GetMembres(request.Query.Limit)
			if err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("db: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = "ok"
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	if err := pave.EchoRegister[ProgrammesGETRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodGet,
		"/programme/",
		"Get programmes",
		"ProgrammesGET", func(c echo.Context) (err error) {
			var request, response = ProgrammesGETRequest{}, ProgrammesGETResponse{}

			queryLimit := c.QueryParam("limit")
			if queryLimit != "" {
				request.Query.Limit, err = strconv.Atoi(queryLimit)
				if err != nil {
					var response voki.ResponseBadRequest
					response.Message = fmt.Sprintf("parsing limit: %s", err)
					return c.JSON(response.StatusCode(), response)
				}

			} else {
				//TODO cfg.API.DefaultLimit
				request.Query.Limit = 1000
			}

			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete ProgrammesGET request received"
				return c.JSON(response.StatusCode(), response)
			}

			response.Data.Programmes, err = db.GetProgrammes(request.Query.Limit)
			if err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("db: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = "ok"
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	if err := pave.EchoRegister[MembrePreferedNamePUTRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodPut,
		"/membre/:membre_id/prefered_name/",
		"Update membre prefered name, which is prioritized in the membres_for_display view",
		"MembrePreferedNamePUT", func(c echo.Context) error {
			var request, response = MembrePreferedNamePUTRequest{}, MembrePreferedNamePUTResponse{}

			request.Param.MembreID = c.Param("membre_id")

			if err := c.Bind(&request.Data); err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("parse request body: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete MembrePreferedNamePUT request received"
				return c.JSON(response.StatusCode(), response)
			}

			if err := db.UpdateMembrePreferedName(request.Param.MembreID, request.Data.PreferedName); err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("db: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = fmt.Sprintf("Updated membre %s name to %s", request.Param.MembreID, request.Data.PreferedName)
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	if err := pave.EchoRegister[MembresDisplayGETRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodGet,
		"/membre/display/",
		"Get membres",
		"MembresDisplayGET", func(c echo.Context) (err error) {
			var request, response = MembresDisplayGETRequest{}, MembresDisplayGETResponse{}

			queryLimit := c.QueryParam("limit")
			if queryLimit != "" {
				request.Query.Limit, err = strconv.Atoi(queryLimit)
				if err != nil {
					var response voki.ResponseBadRequest
					response.Message = fmt.Sprintf("parsing limit: %s", err)
					return c.JSON(response.StatusCode(), response)
				}

			} else {
				//TODO cfg.API.DefaultLimit
				request.Query.Limit = 1000
			}

			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete MembresDisplayGET request received"
				return c.JSON(response.StatusCode(), response)
			}

			response.Data.Membres, err = db.GetMembresForDisplay(request.Query.Limit)
			if err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("db: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = "ok"
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	if err := pave.EchoRegister[MembreDisplayGETRequest](
		apiGroup,
		&p,
		apiPath,
		http.MethodGet,
		"/membre/:membre_id/display/",
		"Get membre",
		"MembreDisplayGET", func(c echo.Context) error {
			var request, response = MembreDisplayGETRequest{}, MembreDisplayGETResponse{}

			request.Param.MembreID = c.Param("membre_id")

			if !request.Complete() {
				var response voki.ResponseBadRequest
				response.Message = "Incomplete MembreDisplayGET request received"
				return c.JSON(response.StatusCode(), response)
			}

			membre, err := db.GetMembreForDisplay(request.Param.MembreID)
			if err != nil {
				var response voki.ResponseBadRequest
				response.Message = fmt.Sprintf("db: %s", err)
				return c.JSON(response.StatusCode(), response)
			}
			response.Data.Membre = membre

			if err := response.SetStatusCode(http.StatusOK); err != nil {
				var response voki.ResponseInternalServerError
				response.Message = fmt.Sprintf("handler: %s", err)
				return c.JSON(response.StatusCode(), response)
			}

			response.Message = "ok"
			return c.JSON(response.StatusCode(), response)

		}); err != nil {
		return err
	}

	return nil
}