package handlers

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.uber.org/zap"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

func setupSupportTestRouter(t *testing.T) (*gin.Engine, *gorm.DB) {
	t.Helper()
	gin.SetMode(gin.TestMode)

	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	require.NoError(t, err)

	// Create support_tickets table for SQLite
	require.NoError(t, db.Exec(`
		CREATE TABLE IF NOT EXISTS support_tickets (
			id TEXT PRIMARY KEY DEFAULT (lower(hex(randomblob(16)))),
			user_id TEXT,
			email TEXT NOT NULL,
			subject TEXT NOT NULL,
			message TEXT NOT NULL,
			category TEXT DEFAULT 'general',
			status TEXT DEFAULT 'open',
			created_at DATETIME DEFAULT CURRENT_TIMESTAMP
		)
	`).Error)

	router := gin.New()
	handler := NewSupportHandler(db, zap.NewNop())
	router.POST("/api/v1/support/tickets", handler.SubmitTicket)

	return router, db
}

func TestSupportHandler_SubmitTicket_Success(t *testing.T) {
	router, db := setupSupportTestRouter(t)

	body, _ := json.Marshal(map[string]string{
		"email":    "user@example.com",
		"subject":  "Payment issue",
		"message":  "I have a problem with my payment for order #123. Please help.",
		"category": "payment",
	})

	req := httptest.NewRequest(http.MethodPost, "/api/v1/support/tickets", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	router.ServeHTTP(w, req)

	assert.Equal(t, http.StatusCreated, w.Code)

	var resp map[string]interface{}
	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &resp))
	data := resp["data"].(map[string]interface{})
	assert.NotEmpty(t, data["ticket_id"])
	assert.Contains(t, data["message"], "submitted")

	// Verify in DB
	var count int64
	db.Table("support_tickets").Count(&count)
	assert.Equal(t, int64(1), count)
}

func TestSupportHandler_SubmitTicket_MissingFields(t *testing.T) {
	router, _ := setupSupportTestRouter(t)

	body, _ := json.Marshal(map[string]string{
		"email": "user@example.com",
		// Missing subject and message
	})

	req := httptest.NewRequest(http.MethodPost, "/api/v1/support/tickets", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	router.ServeHTTP(w, req)

	assert.NotEqual(t, http.StatusCreated, w.Code)
}

func TestSupportHandler_SubmitTicket_InvalidEmail(t *testing.T) {
	router, _ := setupSupportTestRouter(t)

	body, _ := json.Marshal(map[string]string{
		"email":   "not-an-email",
		"subject": "Test subject",
		"message": "This is a test message with enough characters.",
	})

	req := httptest.NewRequest(http.MethodPost, "/api/v1/support/tickets", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	router.ServeHTTP(w, req)

	assert.NotEqual(t, http.StatusCreated, w.Code)
}

func TestSupportHandler_SubmitTicket_DefaultCategory(t *testing.T) {
	router, db := setupSupportTestRouter(t)

	body, _ := json.Marshal(map[string]string{
		"email":   "user@example.com",
		"subject": "General question",
		"message": "I have a question about the platform features.",
	})

	req := httptest.NewRequest(http.MethodPost, "/api/v1/support/tickets", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	router.ServeHTTP(w, req)

	assert.Equal(t, http.StatusCreated, w.Code)

	// Verify default category
	var ticket SupportTicket
	db.Table("support_tickets").First(&ticket)
	assert.Equal(t, "general", ticket.Category)
}