const std = @import("std");
const builtin = @import("builtin");
const http = @import("http");
const util = @import("util");

const api = @import("./api.zig");
const Uuid = util.Uuid;
const c = @import("./controllers.zig");

// this thing is overcomplicated and weird. stop this
const Router = http.Router(*RequestServer);
const Route = Router.Route;
const RouteArgs = http.RouteArgs;
const router = Router{
    .routes = &[_]Route{
        Route.new(.GET, "/healthcheck", c.healthcheck),

        Route.new(.POST, "/auth/register", c.auth.register),
        Route.new(.POST, "/auth/login", c.auth.login),

        Route.new(.POST, "/notes", c.notes.create),
        Route.new(.GET, "/notes/:id", c.notes.get),

        Route.new(.GET, "/notes/:id/reacts", c.notes.reacts.list),
        Route.new(.POST, "/notes/:id/reacts", c.notes.reacts.create),

        Route.new(.GET, "/actors/:id", c.actors.get),

        Route.new(.POST, "/admin/invites", c.admin.invites.create),
        Route.new(.GET, "/admin/invites/:id", c.admin.invites.get),
    },
};

pub const RequestServer = struct {
    alloc: std.mem.Allocator,
    api: api.ApiSource,
    config: Config,

    fn init(alloc: std.mem.Allocator, config: Config) !RequestServer {
        return RequestServer{
            .alloc = alloc,
            .api = try api.ApiSource.init(alloc, config),
            .config = config,
        };
    }

    fn listenAndRun(self: *RequestServer, addr: std.net.Address) !void {
        var srv = http.Server.listen(addr) catch unreachable;
        defer srv.shutdown();

        while (true) {
            const buf = try self.alloc.alloc(u8, 1 << 28); // 4mb
            defer self.alloc.free(buf);
            var fba = std.heap.FixedBufferAllocator.init(buf);
            const alloc = fba.allocator();

            var ctx = try srv.accept(alloc);
            defer ctx.close();

            router.dispatch(self, &ctx, ctx.request.method, ctx.request.path) catch |err| switch (err) {
                error.NotFound, error.RouteNotApplicable => c.notFound(self, &ctx),
                else => return err,
            };
        }
    }
};

pub const Config = struct {
    host: []const u8,
};

fn loadConfig(alloc: std.mem.Allocator) !Config {
    var file = try std.fs.cwd().openFile("config.json", .{});
    defer file.close();

    const bytes = try file.reader().readAllAlloc(alloc, 1 << 63);
    defer alloc.free(bytes);

    var ts = std.json.TokenStream.init(bytes);
    return std.json.parse(Config, &ts, .{ .allocator = alloc });
}

pub fn main() anyerror!void {
    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
    const cfg = try loadConfig(gpa.allocator());
    var srv = try RequestServer.init(gpa.allocator(), cfg);
    api.initThreadPrng(@bitCast(u64, std.time.milliTimestamp()));
    return srv.listenAndRun(std.net.Address.parseIp("0.0.0.0", 8080) catch unreachable);
}