package main

import (
	"git.xdrm.io/example/aicra/controller/db"
	e "git.xdrm.io/go/aicra/err"
	i "git.xdrm.io/go/aicra/implement"
)

// Redirects to an url from a key
func Get(d i.Arguments, r *i.Response) i.Response {

	/* (1) Init redis connection */
	cli := db.Connect()
	if cli == nil {
		r.Err = e.Failure
		return *r
	}

	/* (2) Extract api input */
	key, ok := d["url"].(string)

	if !ok {
		r.Err = e.InvalidParam
		r.Err.BindArgument("url")
		return *r
	}

	/* (3) Check if match for this key */
	val := cli.Get(key)
	if val == nil {
		r.Err = e.NoMatchFound
		return *r
	}

	/* (4) Redirect to value */
	r.Set("_REDIRECT_", string(val))
	r.Err = e.Success
	return *r
}

// Stores a new tinyurl/fullurl combination
func Post(d i.Arguments, r *i.Response) i.Response {
	/* (1) Init redis connection */
	cli := db.Connect()
	if cli == nil {
		r.Err = e.Failure
		return *r
	}

	/* (2) Extract api input */
	target, ok1 := d["target"].(string)
	url, ok2 := d["url"].(string)

	if !ok1 || !ok2 {
		r.Err = e.InvalidParam
		return *r
	}

	/* (3) Check if key already used */
	if cli.Get(url) != nil {
		r.Err = e.AlreadyExists
		return *r
	}

	/* (4) Store */
	if !cli.Set(url, target) {
		r.Err = e.Failure
		return *r
	}

	r.Err = e.Success
	return *r
}

// Overrides a existing tinyurl with new target
func Put(d i.Arguments, r *i.Response) i.Response {

	/* (1) Init redis connection */
	cli := db.Connect()
	if cli == nil {
		r.Err = e.Failure
		return *r
	}

	/* (2) Extract api input */
	target, ok1 := d["target"].(string)
	url, ok2 := d["url"].(string)

	if !ok1 || !ok2 {
		r.Err = e.InvalidParam
		return *r
	}

	/* (3) Check if key already used */
	if cli.Get(url) == nil {
		r.Err = e.NoMatchFound
		return *r
	}

	/* (4) Update */
	if !cli.Set(url, target) {
		r.Err = e.Failure
		return *r
	}

	r.Err = e.Success
	return *r
}

// Deletes an existing tinyurl
func Delete(d i.Arguments, r *i.Response) i.Response {

	/* (1) Init redis connection */
	cli := db.Connect()
	if cli == nil {
		r.Err = e.Failure
		return *r
	}

	/* (2) Extract api input */
	url, ok := d["url"].(string)

	if !ok {
		r.Err = e.InvalidParam
		return *r
	}

	/* (3) Check if key already used */
	if cli.Get(url) == nil {
		r.Err = e.NoMatchFound
		return *r
	}

	/* (4) Delete */
	if !cli.Del(url) {
		r.Err = e.Failure
		return *r
	}

	r.Err = e.Success
	return *r
}