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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
}