package api

import (
	"encoding/json"
	"strconv"
	"strings"
	"time"
)

type ErrorResponse struct {
	Errors []string `json:"errors,omitempty"`
}

func (e ErrorResponse) Error() string {
	return strings.Join(e.Errors, "; ")
}

func (e ErrorResponse) IsError() bool {
	return len(e.Errors) > 0
}

type IssueResponse struct {
	ErrorResponse
	Issue *Issue `json:"issue"`
}

type NameWithID struct {
	ID   int    `json:"id"`
	Name string `json:"name,omitempty"`
}

type CustomField struct {
	ID    int    `json:"id"`
	Name  string `json:"name"`
	Value string `json:"value"`
}

type Issue struct {
	ID                  int           `json:"id,omitempty"`
	Project             *NameWithID   `json:"project,omitempty"`
	Tracker             *NameWithID   `json:"tracker,omitempty"`
	Status              *NameWithID   `json:"status,omitempty"`
	Priority            *NameWithID   `json:"priority,omitempty"`
	Author              *NameWithID   `json:"author,omitempty"`
	AssignedTo          *NameWithID   `json:"assigned_to,omitempty"`
	Parent              *NameWithID   `json:"parent,omitempty"`
	Subject             string        `json:"subject,omitempty"`
	Description         string        `json:"description,omitempty"`
	StartDate           interface{}   `json:"start_date,omitempty"`
	DueDate             interface{}   `json:"due_date,omitempty"`
	DoneRatio           int           `json:"done_ratio,omitempty"`
	IsPrivate           bool          `json:"is_private,omitempty"`
	EstimatedHours      Hours         `json:"estimated_hours,omitempty"`
	TotalEstimatedHours Hours         `json:"total_estimated_hours,omitempty"`
	SpentHours          Hours         `json:"spent_hours,omitempty"`
	TotalSpentHours     Hours         `json:"total_spent_hours,omitempty"`
	CustomFields        []CustomField `json:"custom_fields,omitempty"`
	CreatedOn           *time.Time    `json:"created_on,omitempty"`
	UpdatedOn           *time.Time    `json:"updated_on,omitempty"`
	ClosedOn            interface{}   `json:"closed_on,omitempty"`
}

type Hours string

func (h Hours) MarshalJSON() ([]byte, error) {
	f, err := strconv.ParseFloat(string(h), 64)
	if err != nil {
		return nil, err
	}
	return []byte(strconv.FormatFloat(f, 'f', 2, 64)), nil
}

func (h *Hours) UnmarshalJSON(b []byte) error {
	f, err := strconv.ParseFloat(string(b), 64)
	if err != nil {
		var output string
		defer func() {
			*h = Hours(output)
		}()
		return json.Unmarshal(b, &output)
	}
	*h = Hours(strconv.FormatFloat(f, 'f', 2, 64))
	return nil
}