import {betterAuth} from "better-auth";
import {drizzleAdapter} from "better-auth/adapters/drizzle";
import * as drizzleDb from "@/db";
import {db} from "@/db";
import {env} from "@/env.mjs";
import {nextCookies} from "better-auth/next-js";
import {admin as adminPlugin, openAPI, Organization, organization, twoFactor} from "better-auth/plugins";
import {ac, admin, orgAdmin, orgMember, orgOwner, pending, superadmin, user} from "@/lib/auth/permissions";
import {headers} from "next/headers";
import {count, eq} from "drizzle-orm";
import {MemberWithUser, OrganizationWithMembersAndUsers,} from "@/db/schema/03_organization";
import {sendEmail} from "@/lib/email";
import {render} from "@react-email/render";
import {withUpdatedAt} from "@/db/utils";
import EmailVerification from "@/components/emails/auth/email-verification";
import EmailForgotPassword from "@/components/emails/auth/email-forgot-password";
import {getDeviceDetails} from "@/utils/detection";
import EmailNewLogin from "@/components/emails/auth/email-new-login";
import {sso} from "@better-auth/sso";
import {SUPPORTED_PROVIDERS} from "@/lib/auth/config";
import {passkey} from "@better-auth/passkey";
import {getOidcProviders} from "./oidc";
import {APIError} from "better-auth/api";
import {getOAuthProviders} from "./oauth";


const oidcProviders = getOidcProviders();

export const auth = betterAuth({
    onAPIError: {
        errorURL: "/error",
        onError: (error, ctx) => {
            //todo: capture errors in a monitoring service
        },
    },
    database: drizzleAdapter(db, {
        provider: "pg",
        schema: drizzleDb.schemas,
    }),
    appName: env.PROJECT_NAME!,
    baseURL: env.PROJECT_URL,
    secret: env.PROJECT_SECRET,
    emailAndPassword: {
        enabled: env.AUTH_EMAIL_PASSWORD_ENABLED === "true",
        requireEmailVerification: false,
        sendResetPassword: async ({user, token}, request) => {
            if (env.AUTH_EMAIL_PASSWORD_ENABLED !== "true") {
                throw new APIError("FORBIDDEN", {
                    message: "Password reset is disabled.",
                });
            }
            await db
                .update(drizzleDb.schemas.user)
                .set(
                    withUpdatedAt({
                        emailVerified: true,
                    }),
                )
                .where(eq(drizzleDb.schemas.user.id, user.id))
                .returning();

            await sendEmail({
                to: user.email,
                subject: "Reset your password",
                html: await render(
                    EmailForgotPassword({
                        firstname: user.name!,
                        token,
                    }),
                    {},
                ),
            });
        },
    },
    emailVerification: {
        async sendVerificationEmail({user, token, url}) {
            await sendEmail({
                to: user.email,
                subject: "Portabase Email Verification",
                html: await render(
                    EmailVerification({
                        firstname: user.name,
                        url: url,
                    }),
                ),
            });

            await (
                await auth.$context
            ).internalAdapter.updateUser(user.id, {
                emailVerified: false,
            });
        },
        async afterEmailVerification(user) {
            await (
                await auth.$context
            ).internalAdapter.updateUser(user.id, {
                emailVerified: true,
            });
        },
    },
    socialProviders: getOAuthProviders().reduce<
        Record<string, { clientId: string; clientSecret: string }>
    >((acc, provider) => {
        const configEntry = SUPPORTED_PROVIDERS.find((p) => p.id === provider.id);

        if (!configEntry?.isActive) {
            return acc;
        }

        acc[provider.id] = {
            clientId: provider.client,
            clientSecret: provider.secret,
            ...(provider.id === "apple" && provider.appleBundleIdentifier
                ? {appBundleIdentifier: provider.appleBundleIdentifier}
                : {}),
        };
        return acc;
    }, {}),
    account: {
        accountLinking: {
            enabled: true,
            trustedProviders: [
                "credential",
                ...getOAuthProviders().map((p) => p.id),
                ...oidcProviders.map((p) => p.id),
            ],
            allowDifferentEmails: true,
        },
    },

    plugins: [
        sso({
            defaultSSO: oidcProviders.map((p) => ({
                oidcConfig: {
                    issuer: p.issuerUrl,
                    discoveryEndpoint: p.discoveryEndpoint,
                    jwksEndpoint: p.jwksEndpoint,
                    clientId: p.client,
                    clientSecret: p.secret,
                    scopes: p.scopes?.split(" ") ?? ["openid", "profile", "email"],
                    pkce: p.pkce,
                    mapping: {
                        extraFields: {
                            groups: "groups",
                        },
                    },
                },
                providerId: p.id,
                domain: p.host,
                //@ts-ignore
                issuer: p.issuerUrl,
            })),
            provisionUser: async ({user: usr, userInfo, provider}) => {
                const existingUser = await db.query.user.findFirst({
                    where: eq(drizzleDb.schemas.user.email, usr.email),
                });

                if (existingUser && existingUser.role === "superadmin") {
                    return;
                }

                if (existingUser && env.AUTH_SYNC_OIDC_ROLES_ON_LOGIN === "false") {
                    return;
                }

                const providerId = provider.providerId;
                const oidcProvider = oidcProviders.find((p) => p.id === providerId);
                const allowedGroup = oidcProvider?.allowedGroup || env.ALLOWED_GROUP;
                const roleMapStr = oidcProvider?.roleMap;

                const rawGroups = userInfo?.groups || userInfo?.roles || [];

                const userGroups: string[] = Array.isArray(rawGroups)
                    ? rawGroups.reduce((carry: string[], group) => {
                        carry.push(String(group).toLowerCase());
                        return carry;
                    }, [])
                    : [String(rawGroups).toLowerCase()];

                let roleToAssign: string | undefined;

                if (roleMapStr) {
                    const mappings = roleMapStr.split(",").map((m) => m.split(":"));
                    for (const [group, role] of mappings) {
                        if (userGroups.includes(group.trim())) {
                            roleToAssign = role.trim();
                            break;
                        }
                    }
                }

                if (!roleToAssign && allowedGroup) {
                    const hasAccess = userGroups.includes(allowedGroup);

                    if (hasAccess) {
                        const userCount = (
                            await db.select({count: count()}).from(drizzleDb.schemas.user)
                        )[0].count;
                        const isSuperadmin = userCount === 0;

                        roleToAssign =
                            allowedGroup.includes("admin") ||
                            allowedGroup.includes("superadmin")
                                ? isSuperadmin
                                    ? "superadmin"
                                    : "admin"
                                : "pending";
                    }
                }

                if (!roleToAssign && oidcProvider?.defaultRole) {
                    roleToAssign = oidcProvider.defaultRole;
                }

                if (!roleToAssign) {
                    console.warn(
                        `Access Denied for user ${usr.email}: No matching group/role found in ${providerId} config.`,
                    );
                    throw new APIError("FORBIDDEN", {
                        message: `Access Denied: No matching roles found (${roleToAssign})`,
                    });
                }

                const userCount = (
                    await db.select({count: count()}).from(drizzleDb.schemas.user)
                )[0].count;
                if (
                    userCount === 0 &&
                    (roleToAssign === "admin" || roleToAssign === "superadmin")
                ) {
                    roleToAssign = "superadmin";
                }

                if (existingUser) {
                    await db
                        .update(drizzleDb.schemas.user)
                        .set({role: roleToAssign, emailVerified: true})
                        .where(eq(drizzleDb.schemas.user.id, existingUser.id));
                } else {
                    return {
                        ...usr,
                        role: roleToAssign,
                        emailVerified: true,
                    };
                }
            },
        }),
        ...(env.AUTH_PASSKEY_ENABLED === "true"
            ? [
                passkey({
                    rpName: env.PROJECT_NAME || "Portabase",
                    rpID: env.PROJECT_URL
                        ? new URL(env.PROJECT_URL).hostname
                        : "localhost",
                }),
            ]
            : []),
        openAPI(),
        nextCookies(),
        twoFactor(),
        organization({
            ac,
            roles: {
                owner: orgOwner,
                admin: orgAdmin,
                member: orgMember,
            },
        }),
        adminPlugin({
            adminRoles: ["admin", "superadmin"],
            defaultRole: "pending",
            ac,
            roles: {
                admin,
                user,
                pending,
                superadmin,
            },
        }),
    ],
    advanced: {
        database: {
            generateId: false,
        },
        cookies: {
            state: {
                attributes: {
                    sameSite: "none",
                    secure: true,
                },
            },
        },
    },
    user: {
        deleteUser: {
            enabled: true,
        },
        changeEmail: {
            enabled: true,
        },
        additionalFields: {
            deletedAt: {
                type: "number",
                nullable: true,
                required: false,
            },
            theme: {
                type: "string",
            },
            lastConnectedAt: {
                type: "date",
            },
            lastChangedPasswordAt: {
                type: "date",
            },
        },
    },
    databaseHooks: {
        account: {
            create: {
                before: async (account) => {
                    const provider = SUPPORTED_PROVIDERS.find(
                        (p) => p.id === account.providerId,
                    );

                    if (provider && provider.allowLinking === false) {
                        throw new APIError("FORBIDDEN", {
                            message: "Linking is disabled for this provider.",
                        });
                    }
                },
            },
        },
        user: {
            update: {
                async before(user, context) {
                    if (env.AUTH_EMAIL_PASSWORD_ENABLED !== "true") {
                        if (user.password || user.lastChangedPasswordAt) {
                            throw new APIError("FORBIDDEN", {
                                message: "Password updates are disabled",
                            });
                        }
                    }
                    return {
                        data: user,
                    };
                },
            },
            create: {
                async before(user, context) {
                    const userCount = (
                        await db.select({count: count()}).from(drizzleDb.schemas.user)
                    )[0].count;

                    if (env.AUTH_SIGNUP_ENABLED !== "true" && userCount > 0) {
                        throw new APIError("FORBIDDEN", {
                            message: "Sign up is disabled",
                        });
                    }

                    const role = userCount === 0 ? "superadmin" : "pending";

                    return {
                        data: {
                            ...user,
                            role,
                        },
                    };
                },
                async after(user, context) {
                    const userCount = (
                        await db.select({count: count()}).from(drizzleDb.schemas.user)
                    )[0].count;
                    const role = userCount === 0 ? "owner" : "admin";

                    const defaultOrgSlug = "default";
                    const defaultOrg = await db.query.organization.findFirst({
                        where: eq(drizzleDb.schemas.organization.slug, defaultOrgSlug),
                    });

                    if (defaultOrg) {
                        await db.insert(drizzleDb.schemas.member).values({
                            userId: user.id,
                            organizationId: defaultOrg.id,
                            role: role,
                        });
                    } else {
                        console.warn(
                            "Default organization not found. Cannot assign member.",
                        );
                    }
                },
            },
        },
        session: {
            create: {
                before: async (session, context) => {
                    const userId = session.userId;

                    const memberships = await db.query.member.findMany({
                        where: eq(drizzleDb.schemas.member.userId, userId),
                    });

                    const url =
                        context?.request?.url || context?.headers?.get("referer") || "";

                    let providerId: string | undefined;

                    if (url) {
                        const urlPath = new URL(url).pathname;
                        const pathParts = urlPath.split("/");
                        const lastPathPart = pathParts[pathParts.length - 1];

                        if (urlPath.startsWith("/api/auth/sso/callback/")) {
                            providerId = lastPathPart;
                        } else if (urlPath.startsWith("/api/auth/callback/")) {
                            providerId = lastPathPart;
                        }
                    }

                    return {
                        data: {
                            activeOrganizationId: memberships[0]?.organizationId,
                            providerId: providerId,
                        },
                    };
                },
                after: async (session) => {
                    const user = await db.query.user.findFirst({
                        where: eq(drizzleDb.schemas.user.id, session.userId),
                    });

                    if (!user) return;

                    const createdAtDiff =
                        new Date(session.createdAt).getTime() -
                        new Date(user.createdAt).getTime();

                    if (createdAtDiff < 5000) {
                        console.log(
                            `Skipping new login email for freshly created user ${user.email}`,
                        );
                        return;
                    }

                    const lastDiff = user.lastConnectedAt
                        ? new Date(session.createdAt).getTime() -
                        new Date(user.lastConnectedAt).getTime()
                        : Infinity;

                    if (lastDiff < 30000) return;

                    if (user.role === "pending") return;

                    const deviceInfo = getDeviceDetails(session.userAgent);

                    await sendEmail({
                        to: user.email,
                        subject: "New login to your account",
                        html: await render(
                            EmailNewLogin({
                                firstname: user.name!,
                                os: deviceInfo.os,
                                browser: deviceInfo.browser,
                                ipAddress: session.ipAddress!,
                            }),
                            {},
                        ),
                    });

                    (await auth.$context).internalAdapter.updateUser(user.id, {
                        lastConnectedAt: new Date(),
                    });
                },
            },
        },
    },
    session: {
        additionalFields: {
            activeOrganizationId: {
                type: "string",
                required: false,
            },
            providerId: {
                type: "string",
                required: false,
            },
        },
    },
    /*    databaseHooks: {
          session: {
              create: {
                  before: async (session) => {
                      const organizationId = await getLastOrganizationOrFirst(session.userId);

                      if (!organizationId) {
                          return {
                              ...session,
                          };
                      }


                      const [aa] = await db
                          .update(drizzleUser.session)
                          .set({ activeOrganizationId: organizationId })
                          .where(eq(drizzleUser.session.id, session.id))
                          .returning();


                      return {
                          ...session,
                          activeOrganizationId: organizationId,
                      };
                  },
              },
          },
      },*/
    trustedOrigins: [env.PROJECT_URL!, "http://app"],
});

/*export const signUpUser = async (email: string, password: string, name: string) => {
    const user = await auth.api.signUpEmail({
        body: {
            email,
            password,
            name,
        },
    });

    return user;
};

export const signInUser = async (email: string, password: string) => {
    const user = await auth.api.signInEmail({
        body: {
            email,
            password,
        },
    });

    return user;
};*/

export const createUser = async (
    name: string,
    email: string,
    password: string,
    role: "user" | "pending" | "admin" | "superadmin" = "pending",
) => {
    return await auth.api.createUser({
        headers: await headers(),
        body: {
            name,
            email,
            password,
            role,
        },
    });
};

export const getSessions = async () => {
    return await auth.api.listSessions({
        headers: await headers(),
    });
};

export const getSession = async () => {
    return await auth.api.getSession({
        headers: await headers(),
    });
};

export const revokeSession = async (e: string) => {
    try {
        const {status} = await auth.api.revokeSession({
            body: {
                token: e,
            },
            headers: await headers(),
        });
        return status;
    } catch (e) {
    }
};

export const getAccounts = async () => {
    return await auth.api.listUserAccounts({
        headers: await headers(),
    });
};

export const unlinkAccount = async (provider: string, account: string) => {
    try {
        const {status} = await auth.api.unlinkAccount({
            body: {
                providerId: provider,
                accountId: account,
            },
            headers: await headers(),
        });

        return status;
    } catch (e) {
    }
};

export const getOrganization = async ({
                                          organizationId,
                                          organizationSlug,
                                      }: {
    organizationId?: string;
    organizationSlug?: string;
} = {}): Promise<OrganizationWithMembersAndUsers | null> => {
    const query =
        organizationId != null
            ? {organizationId}
            : organizationSlug != null
                ? {organizationSlug}
                : undefined;

    try {
        const response = await auth.api.getFullOrganization({
            headers: await headers(),
            ...(query ? {query} : {}),
        });

        return response as OrganizationWithMembersAndUsers;
    } catch (e) {
        console.error(e);
        return null;
    }
};

export const getPasskeys = async () => {
    if (env.AUTH_PASSKEY_ENABLED !== "true") return [];
    const passkeys = await auth.api.listPasskeys({
        headers: await headers(),
    });

    return passkeys;
};

export const revokePasskey = async (e: string) => {
    if (env.AUTH_PASSKEY_ENABLED !== "true") return;
    await auth.api.deletePasskey({
        body: {
            id: e,
        },
        headers: await headers(),
    });
};

export const listOrganizations = async (): Promise<Organization[] | null> => {
    try {
        return (await auth.api.listOrganizations({
            headers: await headers(),
        })) as Organization[];
    } catch (e) {
        return null;
    }
};

export const getLastOrganizationOrFirst = async (userId: string) => {
    try {
        const organizations = await db.query.organization.findMany({
            where: eq(drizzleDb.schemas.member.userId, userId),
        });

        if (organizations.length > 0) {
            return organizations[0].id;
        }

        return null;
    } catch (e) {
        return null;
    }
};

export const createOrganization = async (name: string, slug: string) => {
    try {
        return await auth.api.createOrganization({
            headers: await headers(),
            body: {
                name,
                slug,
            },
        });
    } catch (e: any) {
        const errorMessage =
            e?.response?.data?.message || e?.message || "Unknown auth error";
        const status = e?.response?.status || 500;

        console.error("Auth API createOrganization error:", {
            message: errorMessage,
            status,
            raw: e,
        });

        throw {
            name: "AuthCreateOrganizationError",
            message: errorMessage,
            status,
            cause: e,
        };
    }
};

export const deleteOrganization = async (organizationId: string) => {
    try {
        return await auth.api.deleteOrganization({
            body: {
                organizationId,
            },
            headers: await headers(),
        });
    } catch (e: any) {
        const errorMessage =
            e?.response?.data?.message || e?.message || "Unknown auth error";
        const status = e?.response?.status || 500;

        console.error("Auth API deleteOrganization error:", {
            message: errorMessage,
            status,
            raw: e,
        });

        throw {
            name: "AuthDeleteOrganizationError",
            message: errorMessage,
            status,
            cause: e,
        };
    }
};

export const checkSlugOrganization = async (slug: string) => {
    try {
        const {status} = await auth.api.checkOrganizationSlug({
            headers: await headers(),
            body: {
                slug,
            },
        });

        return status;
    } catch {
    }
};

export const getActiveMember = async () => {
    try {
        const member = await auth.api.getActiveMember({
            headers: await headers(),
        });

        return member as MemberWithUser;
    } catch (e) {
        console.log("err", e);
    }
};

export const setActiveOrganization = async (slug: string) => {
    try {
        return await auth.api.setActiveOrganization({
            headers: await headers(),
            body: {
                organizationSlug: slug,
            },
        });
    } catch {
    }
};