/*
   Copyright 2017-2019 Jan Dittberner

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this program except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
package main

import (
	"fmt"
	"strconv"
	"strings"
	"time"
)

var validDueDurations = map[string]time.Duration{
	"+3 days":  time.Hour * 24 * 3,
	"+7 days":  time.Hour * 24 * 7,
	"+14 days": time.Hour * 24 * 14,
	"+28 days": time.Hour * 24 * 28,
}

type NewDecisionForm struct {
	Title    string
	Content  string
	VoteType string
	Due      string
	Errors   map[string]string
}

func (f *NewDecisionForm) Validate() (bool, *Decision) {
	f.Errors = make(map[string]string)

	data := &Decision{}

	data.Title = strings.TrimSpace(f.Title)
	if len(data.Title) < 3 {
		f.Errors["Title"] = "Please enter at least 3 characters for Title."
	}

	data.Content = strings.TrimSpace(f.Content)
	if len(strings.Fields(data.Content)) < 3 {
		f.Errors["Content"] = "Please enter at least 3 words as Text."
	}

	if voteType, err := strconv.ParseUint(f.VoteType, 10, 8); err != nil || (voteType != 0 && voteType != 1) {
		f.Errors["VoteType"] = fmt.Sprint("Please choose a valid vote type.", err)
	} else {
		data.VoteType = VoteType(uint8(voteType))
	}

	if dueDuration, ok := validDueDurations[f.Due]; !ok {
		f.Errors["Due"] = "Please choose a valid due date."
	} else {
		year, month, day := time.Now().UTC().Add(dueDuration).Date()
		data.Due = time.Date(year, month, day, 23, 59, 59, 0, time.UTC)
	}

	return len(f.Errors) == 0, data
}

type EditDecisionForm struct {
	Title    string
	Content  string
	VoteType string
	Due      string
	Decision *Decision
	Errors   map[string]string
}

func (f *EditDecisionForm) Validate() (bool, *Decision) {
	f.Errors = make(map[string]string)

	data := f.Decision

	data.Title = strings.TrimSpace(f.Title)
	if len(data.Title) < 3 {
		f.Errors["Title"] = "Please enter at least 3 characters for Title."
	}

	data.Content = strings.TrimSpace(f.Content)
	if len(strings.Fields(data.Content)) < 3 {
		f.Errors["Content"] = "Please enter at least 3 words as Text."
	}

	if voteType, err := strconv.ParseUint(f.VoteType, 10, 8); err != nil || (voteType != 0 && voteType != 1) {
		f.Errors["VoteType"] = fmt.Sprint("Please choose a valid vote type.", err)
	} else {
		data.VoteType = VoteType(uint8(voteType))
	}

	if dueDuration, ok := validDueDurations[f.Due]; !ok {
		f.Errors["Due"] = "Please choose a valid due date."
	} else {
		year, month, day := time.Now().UTC().Add(dueDuration).Date()
		data.Due = time.Date(year, month, day, 23, 59, 59, 0, time.UTC)
	}

	return len(f.Errors) == 0, data
}

type ProxyVoteForm struct {
	Voter         string
	Vote          string
	Justification string
	Errors        map[string]string
}

func (f *ProxyVoteForm) Validate() (bool, *Voter, *Vote, string) {
	f.Errors = make(map[string]string)

	data := &Vote{}

	var voter *Voter
	if voterId, err := strconv.ParseInt(f.Voter, 10, 64); err != nil {
		f.Errors["Voter"] = fmt.Sprint("Please choose a valid voter.", err)
	} else if voter, err = GetVoterById(voterId); err != nil {
		f.Errors["Voter"] = fmt.Sprint("Please choose a valid voter.", err)
	} else {
		data.VoterId = voter.Id
	}

	if vote, err := strconv.ParseInt(f.Vote, 10, 8); err != nil {
		f.Errors["Vote"] = fmt.Sprint("Please choose a valid vote.", err)
	} else if voteChoice, ok := VoteChoices[vote]; !ok {
		f.Errors["Vote"] = fmt.Sprint("Please choose a valid vote.")
	} else {
		data.Vote = voteChoice
	}

	justification := strings.TrimSpace(f.Justification)
	if len(justification) < 3 {
		f.Errors["Justification"] = "Please enter at least 3 characters for justification."
	}

	return len(f.Errors) == 0, voter, data, justification
}