package models

import (
	"time"

	"gorm.io/gorm"
)

// Request status shared by leave/overtime approval workflows.
const (
	StatusPending  = "pending"
	StatusApproved = "approved"
	StatusRejected = "rejected"
	StatusCanceled = "canceled"
)

// Leave types (한국 근로기준법 기준). 연차 draws down the annual balance; the rest
// are 인정/무급 categories that still count toward worked time where applicable.
const (
	LeaveAnnual    = "annual"    // 연차
	LeaveHalfAM    = "half_am"   // 오전 반차
	LeaveHalfPM    = "half_pm"   // 오후 반차
	LeavePublic    = "public"    // 공가
	LeaveSick      = "sick"      // 병가
	LeaveFamily    = "family"    // 경조사
	LeaveUnpaid    = "unpaid"    // 무급
)

// Attendance is one day's clock record for a member (date is YYYY-MM-DD in KST).
type Attendance struct {
	Base
	MemberEmail string     `gorm:"index" json:"memberEmail"`
	Date        string     `gorm:"index" json:"date"` // YYYY-MM-DD
	ClockIn     *time.Time `json:"clockIn"`
	ClockOut    *time.Time `json:"clockOut"`
	WorkMinutes int        `json:"workMinutes"` // computed net worked minutes
	Source      string     `json:"source"`      // web | admin | auto
	Note        string     `json:"note"`
	CreatedAt   time.Time  `json:"createdAt"`
	UpdatedAt   time.Time  `json:"updatedAt"`
}

func (m *Attendance) BeforeCreate(*gorm.DB) error { m.ensureID(); return nil }

// LeaveRequest is a member-submitted leave application. Members may only create;
// admins approve/reject. Days is fractional to support 반차 (0.5).
type LeaveRequest struct {
	Base
	MemberEmail string     `gorm:"index" json:"memberEmail"`
	Type        string     `json:"type"`
	StartDate   string     `json:"startDate"` // YYYY-MM-DD
	EndDate     string     `json:"endDate"`
	Days        float64    `json:"days"`
	Reason      string     `json:"reason"`
	Status      string     `gorm:"index" json:"status"`
	Approver    string     `json:"approver"`
	DecidedAt   *time.Time `json:"decidedAt"`
	DecisionMemo string    `json:"decisionMemo"`
	CreatedAt   time.Time  `json:"createdAt"`
	UpdatedAt   time.Time  `json:"updatedAt"`
}

func (m *LeaveRequest) BeforeCreate(*gorm.DB) error { m.ensureID(); return nil }

// OvertimeRequest is a member-submitted overtime application (관리자만 확인/승인).
type OvertimeRequest struct {
	Base
	MemberEmail string     `gorm:"index" json:"memberEmail"`
	Date        string     `json:"date"`
	Minutes     int        `json:"minutes"`
	Reason      string     `json:"reason"`
	Status      string     `gorm:"index" json:"status"`
	Approver    string     `json:"approver"`
	DecidedAt   *time.Time `json:"decidedAt"`
	DecisionMemo string    `json:"decisionMemo"`
	CreatedAt   time.Time  `json:"createdAt"`
	UpdatedAt   time.Time  `json:"updatedAt"`
}

func (m *OvertimeRequest) BeforeCreate(*gorm.DB) error { m.ensureID(); return nil }

// WorkPolicy is the company-wide work-hours policy used by the monthly timesheet
// roll-up. Singleton-ish (one active row); admin editable.
type WorkPolicy struct {
	Base
	Name              string    `json:"name"`
	WeeklyHours       float64   `json:"weeklyHours"`       // 주 소정근로시간 (기본 40)
	DailyStandardMin  int       `json:"dailyStandardMin"`  // 일 소정근로분 (기본 480)
	CoreStart         string    `json:"coreStart"`         // "09:00"
	CoreEnd           string    `json:"coreEnd"`           // "18:00"
	LunchMinutes      int       `json:"lunchMinutes"`      // 휴게(기본 60)
	AnnualLeaveBase   float64   `json:"annualLeaveBase"`   // 1년 미만/이상 기준 부여일
	Active            bool      `json:"active"`
	CreatedAt         time.Time `json:"createdAt"`
	UpdatedAt         time.Time `json:"updatedAt"`
}

func (m *WorkPolicy) BeforeCreate(*gorm.DB) error { m.ensureID(); return nil }

// LeaveBalance tracks per-member annual leave usage for a given year.
type LeaveBalance struct {
	Base
	MemberEmail string  `gorm:"index" json:"memberEmail"`
	Year        int     `gorm:"index" json:"year"`
	Granted     float64 `json:"granted"`
	Used        float64 `json:"used"`
}

func (m *LeaveBalance) BeforeCreate(*gorm.DB) error { m.ensureID(); return nil }