package requests

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

	"github.com/shopspring/decimal"
)

// FlexibleDate handles both "2025-11-27" and "2025-11-27T00:00:00Z" formats
type FlexibleDate struct {
	time.Time
}

func (fd *FlexibleDate) UnmarshalJSON(data []byte) error {
	// Remove quotes
	s := strings.Trim(string(data), "\"")
	if s == "" || s == "null" {
		return nil
	}

	// Try RFC3339 first (full datetime)
	t, err := time.Parse(time.RFC3339, s)
	if err == nil {
		fd.Time = t
		return nil
	}

	// Try date-only format
	t, err = time.Parse("2006-01-02", s)
	if err == nil {
		fd.Time = t
		return nil
	}

	return err
}

func (fd FlexibleDate) MarshalJSON() ([]byte, error) {
	if fd.Time.IsZero() {
		return json.Marshal(nil)
	}
	return json.Marshal(fd.Time.Format(time.RFC3339))
}

// ToTimePtr returns a pointer to the underlying time, or nil if zero
func (fd *FlexibleDate) ToTimePtr() *time.Time {
	if fd == nil || fd.Time.IsZero() {
		return nil
	}
	return &fd.Time
}

// CreateTaskRequest represents the request to create a task
type CreateTaskRequest struct {
	ResidenceID   uint             `json:"residence_id" binding:"required"`
	Title         string           `json:"title" binding:"required,min=1,max=200"`
	Description   string           `json:"description"`
	CategoryID    *uint            `json:"category_id"`
	PriorityID    *uint            `json:"priority_id"`
	StatusID      *uint            `json:"status_id"`
	FrequencyID   *uint            `json:"frequency_id"`
	AssignedToID  *uint            `json:"assigned_to_id"`
	DueDate       *FlexibleDate    `json:"due_date"`
	EstimatedCost *decimal.Decimal `json:"estimated_cost"`
	ContractorID  *uint            `json:"contractor_id"`
}

// UpdateTaskRequest represents the request to update a task
type UpdateTaskRequest struct {
	Title         *string          `json:"title" binding:"omitempty,min=1,max=200"`
	Description   *string          `json:"description"`
	CategoryID    *uint            `json:"category_id"`
	PriorityID    *uint            `json:"priority_id"`
	StatusID      *uint            `json:"status_id"`
	FrequencyID   *uint            `json:"frequency_id"`
	AssignedToID  *uint            `json:"assigned_to_id"`
	DueDate       *FlexibleDate    `json:"due_date"`
	EstimatedCost *decimal.Decimal `json:"estimated_cost"`
	ActualCost    *decimal.Decimal `json:"actual_cost"`
	ContractorID  *uint            `json:"contractor_id"`
}

// CreateTaskCompletionRequest represents the request to create a task completion
type CreateTaskCompletionRequest struct {
	TaskID      uint             `json:"task_id" binding:"required"`
	CompletedAt *time.Time       `json:"completed_at"` // Defaults to now
	Notes       string           `json:"notes"`
	ActualCost  *decimal.Decimal `json:"actual_cost"`
	PhotoURL    string           `json:"photo_url"`
}