package complaint

import (
	"testing"
	"time"
)

func TestComplaintStatus(t *testing.T) {
	now := time.Now()
	cases := []struct {
		name string
		row  *Complaint
		want string
	}{
		{name: "nil complaint", row: nil, want: StatusActiveNonMEL},
		{name: "unclassified is pending", row: &Complaint{}, want: StatusPendingMEL},
		{name: "classified non-mel", row: &Complaint{MELSeverity: MELSeverityNonMEL, MELClassifiedAt: &now}, want: StatusActiveNonMEL},
		{name: "classified mel A", row: &Complaint{MELSeverity: MELSeverityA, MELClassifiedAt: &now}, want: StatusActiveMEL},
		{name: "fixed overrides mel", row: &Complaint{MELSeverity: MELSeverityA, MELClassifiedAt: &now, FixedAt: &now}, want: StatusServiced},
		{name: "fixed overrides default", row: &Complaint{FixedAt: &now}, want: StatusServiced},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			if got := tc.row.Status(); got != tc.want {
				t.Fatalf("Status() = %q, want %q", got, tc.want)
			}
		})
	}
}

func TestComplaintMELDeadline(t *testing.T) {
	base := time.Date(2026, 6, 17, 8, 0, 0, 0, time.UTC)
	cases := []struct {
		name     string
		row      *Complaint
		wantNil  bool
		wantTime time.Time
	}{
		{name: "non-mel", row: &Complaint{MELSeverity: MELSeverityNonMEL, ReportedAt: base}, wantNil: true},
		// Grace is counted in days: A=1, D=120.
		{name: "mel A", row: &Complaint{MELSeverity: MELSeverityA, ReportedAt: base}, wantTime: base.Add(24 * time.Hour)},
		{name: "mel D", row: &Complaint{MELSeverity: MELSeverityD, ReportedAt: base}, wantTime: base.Add(120 * 24 * time.Hour)},
		{name: "zero reported_at", row: &Complaint{MELSeverity: MELSeverityA}, wantNil: true},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got := tc.row.MELDeadline()
			if tc.wantNil {
				if got != nil {
					t.Fatalf("MELDeadline() = %v, want nil", got)
				}
				return
			}
			if got == nil || !got.Equal(tc.wantTime) {
				t.Fatalf("MELDeadline() = %v, want %v", got, tc.wantTime)
			}
		})
	}
}

func TestComplaintIsGrounding(t *testing.T) {
	base := time.Date(2026, 6, 17, 8, 0, 0, 0, time.UTC)
	fixed := base
	classified := base
	cases := []struct {
		name string
		row  *Complaint
		now  time.Time
		want bool
	}{
		{name: "nsr never grounds", row: &Complaint{MELSeverity: MELSeverityNonMEL, ReportedAt: base, MELClassifiedAt: &classified, IsNSR: true}, now: base, want: false},
		{name: "fixed never grounds", row: &Complaint{MELSeverity: MELSeverityNonMEL, ReportedAt: base, MELClassifiedAt: &classified, FixedAt: &fixed}, now: base, want: false},
		{name: "pending (unclassified) does not ground", row: &Complaint{MELSeverity: MELSeverityNonMEL, ReportedAt: base}, now: base, want: false},
		{name: "action taken alone does not lift grounding (needs EASA release)", row: &Complaint{MELSeverity: MELSeverityNonMEL, ReportedAt: base, MELClassifiedAt: &classified, ActionTaken: ptr("tightened")}, now: base, want: true},
		{name: "action taken with EASA fix lifts grounding", row: &Complaint{MELSeverity: MELSeverityNonMEL, ReportedAt: base, MELClassifiedAt: &classified, ActionTaken: ptr("tightened"), FixedAt: &fixed}, now: base, want: false},
		{name: "non-mel grounds immediately", row: &Complaint{MELSeverity: MELSeverityNonMEL, ReportedAt: base, MELClassifiedAt: &classified}, now: base, want: true},
		{name: "mel within grace not grounding", row: &Complaint{MELSeverity: MELSeverityA, ReportedAt: base, MELClassifiedAt: &classified}, now: base.Add(12 * time.Hour), want: false},
		{name: "mel past grace grounds", row: &Complaint{MELSeverity: MELSeverityA, ReportedAt: base, MELClassifiedAt: &classified}, now: base.Add(2 * 24 * time.Hour), want: true},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			if got := tc.row.IsGrounding(tc.now); got != tc.want {
				t.Fatalf("IsGrounding() = %v, want %v", got, tc.want)
			}
		})
	}
}

func TestComplaintIsMELAOG(t *testing.T) {
	base := time.Date(2026, 6, 17, 8, 0, 0, 0, time.UTC)
	cases := []struct {
		name string
		row  *Complaint
		now  time.Time
		want bool
	}{
		{name: "nsr", row: &Complaint{MELSeverity: MELSeverityA, ReportedAt: base, IsNSR: true}, now: base.Add(time.Hour), want: false},
		{name: "non-mel has no deadline", row: &Complaint{MELSeverity: MELSeverityNonMEL, ReportedAt: base}, now: base.Add(time.Hour), want: false},
		{name: "before deadline", row: &Complaint{MELSeverity: MELSeverityA, ReportedAt: base}, now: base, want: false},
		{name: "at deadline", row: &Complaint{MELSeverity: MELSeverityA, ReportedAt: base}, now: base.Add(24 * time.Hour), want: true},
		{name: "after deadline", row: &Complaint{MELSeverity: MELSeverityA, ReportedAt: base}, now: base.Add(5 * 24 * time.Hour), want: true},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			if got := tc.row.IsMELAOG(tc.now); got != tc.want {
				t.Fatalf("IsMELAOG() = %v, want %v", got, tc.want)
			}
		})
	}
}

func ptr(s string) *string { return &s }

func TestComplaintTableNameAndBeforeCreate(t *testing.T) {
	if (Complaint{}).TableName() != "complaints" {
		t.Fatalf("unexpected table name")
	}
	c := &Complaint{}
	if err := c.BeforeCreate(nil); err != nil {
		t.Fatalf("BeforeCreate err: %v", err)
	}
	if len(c.ID) == 0 {
		t.Fatal("BeforeCreate should set ID")
	}
	prev := string(c.ID)
	if err := c.BeforeCreate(nil); err != nil {
		t.Fatalf("BeforeCreate err: %v", err)
	}
	if string(c.ID) != prev {
		t.Fatal("BeforeCreate must not overwrite an existing ID")
	}
}

func TestMELGraceDays(t *testing.T) {
	if MELGraceDays(MELSeverityA) != 1 || MELGraceDays(MELSeverityD) != 120 {
		t.Fatal("unexpected grace days")
	}
	if MELGraceDays(MELSeverityNonMEL) != 0 {
		t.Fatal("non-mel has no grace")
	}
}
