package api

import (
	"github.com/gin-gonic/gin"
	"github.com/gissleh/stufflog/database"
	"github.com/gissleh/stufflog/internal/auth"
	"github.com/gissleh/stufflog/internal/generate"
	"github.com/gissleh/stufflog/internal/slerrors"
	"github.com/gissleh/stufflog/models"
	"github.com/gissleh/stufflog/services"
)

func ProjectGroup(g *gin.RouterGroup, db database.Database) {
	l := services.Loader{DB: db}

	g.GET("/", handler("projectGroups", func(c *gin.Context) (interface{}, error) {
		return l.ListProjectGroups(c)
	}))

	g.GET("/:id", handler("projectGroup", func(c *gin.Context) (interface{}, error) {
		return l.FindProject(c, c.Param("id"))
	}))

	g.POST("/", handler("projectGroup", func(c *gin.Context) (interface{}, error) {
		group := models.ProjectGroup{}
		err := c.BindJSON(&group)
		if err != nil {
			return nil, slerrors.BadRequest("Invalid JSON")
		}
		if group.Abbreviation == "" || group.Name == "" {
			return nil, slerrors.BadRequest("Abbreviation and name cannot be left empty.")
		}

		group.ID = generate.ProjectGroupID()
		group.UserID = auth.UserID(c)
		if group.CategoryNames == nil {
			group.CategoryNames = make(map[string]string)
		}

		err = db.ProjectGroups().Insert(c.Request.Context(), group)
		if err != nil {
			return nil, err
		}

		return &group, nil
	}))

	g.PUT("/:id", handler("projectGroup", func(c *gin.Context) (interface{}, error) {
		update := models.ProjectGroupUpdate{}
		err := c.BindJSON(&update)
		if err != nil {
			return nil, slerrors.BadRequest("Invalid JSON")
		}
		if (update.Name != nil && *update.Name == "") || (update.Abbreviation != nil && *update.Abbreviation == "") {
			return nil, slerrors.BadRequest("Abbreviation and name cannot be left empty.")
		}

		group, err := db.ProjectGroups().Find(c, c.Param("id"))
		if err != nil {
			return nil, err
		}
		if group.UserID != auth.UserID(c) {
			return nil, slerrors.NotFound("Project group")
		}

		group.Update(update)

		err = db.ProjectGroups().Update(c.Request.Context(), *group)
		if err != nil {
			return nil, err
		}

		return group, nil
	}))

	g.DELETE("/:id", handler("project", func(c *gin.Context) (interface{}, error) {
		group, err := l.FindProjectGroup(c.Request.Context(), c.Param("id"))
		if err != nil {
			return nil, err
		}

		if len(group.Projects) > 0 {
			return nil, slerrors.Forbidden("You cannot delete non-empty project group.")
		}

		err = db.ProjectGroups().Delete(c.Request.Context(), group.ProjectGroup)
		if err != nil {
			return nil, err
		}

		return group, nil
	}))
}