package controller

import (
	"encoding/json"
	"fmt"
	"github.com/songquanpeng/one-api/common"
	"github.com/songquanpeng/one-api/common/config"
	"github.com/songquanpeng/one-api/common/message"
	"github.com/songquanpeng/one-api/model"
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
)

func GetStatus(c *gin.Context) {
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data": gin.H{
			"version":                     common.Version,
			"start_time":                  common.StartTime,
			"email_verification":          config.EmailVerificationEnabled,
			"github_oauth":                config.GitHubOAuthEnabled,
			"github_client_id":            config.GitHubClientId,
			"lark_client_id":              config.LarkClientId,
			"system_name":                 config.SystemName,
			"logo":                        config.Logo,
			"footer_html":                 config.Footer,
			"wechat_qrcode":               config.WeChatAccountQRCodeImageURL,
			"wechat_login":                config.WeChatAuthEnabled,
			"server_address":              config.ServerAddress,
			"turnstile_check":             config.TurnstileCheckEnabled,
			"turnstile_site_key":          config.TurnstileSiteKey,
			"top_up_link":                 config.TopUpLink,
			"chat_link":                   config.ChatLink,
			"quota_per_unit":              config.QuotaPerUnit,
			"display_in_currency":         config.DisplayInCurrencyEnabled,
			"oidc":                        config.OidcEnabled,
			"oidc_client_id":              config.OidcClientId,
			"oidc_well_known":             config.OidcWellKnown,
			"oidc_authorization_endpoint": config.OidcAuthorizationEndpoint,
			"oidc_token_endpoint":         config.OidcTokenEndpoint,
			"oidc_userinfo_endpoint":      config.OidcUserinfoEndpoint,
		},
	})
	return
}

func GetNotice(c *gin.Context) {
	config.OptionMapRWMutex.RLock()
	defer config.OptionMapRWMutex.RUnlock()
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data":    config.OptionMap["Notice"],
	})
	return
}

func GetAbout(c *gin.Context) {
	config.OptionMapRWMutex.RLock()
	defer config.OptionMapRWMutex.RUnlock()
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data":    config.OptionMap["About"],
	})
	return
}

func GetHomePageContent(c *gin.Context) {
	config.OptionMapRWMutex.RLock()
	defer config.OptionMapRWMutex.RUnlock()
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data":    config.OptionMap["HomePageContent"],
	})
	return
}

func SendEmailVerification(c *gin.Context) {
	email := c.Query("email")
	if err := common.Validate.Var(email, "required,email"); err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": "Invalid parameter",
		})
		return
	}
	if config.EmailDomainRestrictionEnabled {
		allowed := false
		for _, domain := range config.EmailDomainWhitelist {
			if strings.HasSuffix(email, "@"+domain) {
				allowed = true
				break
			}
		}
		if !allowed {
			c.JSON(http.StatusOK, gin.H{
				"success": false,
				"message": "AdministratorEnable了邮箱域名白名单，您的Email address的域名不在白名单中",
			})
			return
		}
	}
	if model.IsEmailAlreadyTaken(email) {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": "Email address is occupied",
		})
		return
	}
	code := common.GenerateVerificationCode(6)
	common.RegisterVerificationCodeWithKey(email, code, common.EmailVerificationPurpose)
	subject := fmt.Sprintf("%s Email verification email", config.SystemName)
	content := fmt.Sprintf("<p>Hello, you are verifying %s email.</p>"+
		"<p>Your verification code is: <strong>%s</strong></p>"+
		"<p>The verification code is valid within %d minutes. If it is not your operation, please ignore it.</p>", config.SystemName, code, common.VerificationValidMinutes)
	err := message.SendEmail(subject, email, content)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
	})
	return
}

func SendPasswordResetEmail(c *gin.Context) {
	email := c.Query("email")
	if err := common.Validate.Var(email, "required,email"); err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": "Invalid parameter",
		})
		return
	}
	if !model.IsEmailAlreadyTaken(email) {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": "The email address is not registered",
		})
		return
	}
	code := common.GenerateVerificationCode(0)
	common.RegisterVerificationCodeWithKey(email, code, common.PasswordResetPurpose)
	link := fmt.Sprintf("%s/user/reset?email=%s&token=%s", config.ServerAddress, email, code)
	subject := fmt.Sprintf("%s Password reset", config.SystemName)
	content := fmt.Sprintf("<p>Hello, you are resetting %s password.</p>"+
		"<p>点击 <a href='%s'>此处</a> 进行Password reset。</p>"+
		"<p>如果链接None法点击，请尝试点击下面的链接或将其Copy到浏览器中打开：<br> %s </p>"+
		"<p>The reset link is valid within %d minutes. If it is not your operation, please ignore it.</p>", config.SystemName, link, link, common.VerificationValidMinutes)
	err := message.SendEmail(subject, email, content)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
	})
	return
}

type PasswordResetRequest struct {
	Email string `json:"email"`
	Token string `json:"token"`
}

func ResetPassword(c *gin.Context) {
	var req PasswordResetRequest
	err := json.NewDecoder(c.Request.Body).Decode(&req)
	if req.Email == "" || req.Token == "" {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": "Invalid parameter",
		})
		return
	}
	if !common.VerifyCodeWithKey(req.Email, req.Token, common.PasswordResetPurpose) {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": "Reset link is illegal or expired",
		})
		return
	}
	password := common.GenerateVerificationCode(12)
	err = model.ResetUserPasswordByEmail(req.Email, password)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{
			"success": false,
			"message": err.Error(),
		})
		return
	}
	common.DeleteKey(req.Email, common.PasswordResetPurpose)
	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"message": "",
		"data":    password,
	})
	return
}