const fullData = [
    { x: new Date('2025-04-22'), y: 14.78 },
    { x: new Date('2025-04-23'), y: 14.79 },
    { x: new Date('2025-04-24'), y: 14.78 },
    { x: new Date('2025-04-25'), y: 14.85 },
    { x: new Date('2025-04-26'), y: 14.83 },
    { x: new Date('2025-04-27'), y: 14.83 },
    { x: new Date('2025-04-28'), y: 14.81 },
    { x: new Date('2025-05-02'), y: 14.88 },
    { x: new Date('2025-05-03'), y: 14.99 },
    { x: new Date('2025-05-05'), y: 14.99 },
    { x: new Date('2025-05-06'), y: 14.99 },
    { x: new Date('2025-05-07'), y: 14.90 },
    { x: new Date('2025-05-08'), y: 14.90 },
    { x: new Date('2025-05-09'), y: 14.98 },
    { x: new Date('2025-05-10'), y: 14.97 },
    { x: new Date('2025-05-11'), y: 14.97 },
    { x: new Date('2025-05-12'), y: 15.00 },
    { x: new Date('2025-05-13'), y: 15.10 },
    { x: new Date('2025-05-14'), y: 15.17 },
    { x: new Date('2025-05-15'), y: 15.05 },
    { x: new Date('2025-05-16'), y: 14.96 },
    { x: new Date('2025-05-17'), y: 14.91 },
    { x: new Date('2025-05-19'), y: 14.91 },
    { x: new Date('2025-05-20'), y: 14.95 },
    { x: new Date('2025-05-21'), y: 14.96 },
    { x: new Date('2025-05-22'), y: 15.01 },
    { x: new Date('2025-05-24'), y: 14.95 },
    { x: new Date('2025-05-26'), y: 14.99 },
    { x: new Date('2025-05-27'), y: 15.00 },
    { x: new Date('2025-05-29'), y: 15.02 },
    { x: new Date('2025-06-02'), y: 15.01 },
    { x: new Date('2025-06-06'), y: 14.99 },
    { x: new Date('2025-06-10'), y: 15.05 },
    { x: new Date('2025-06-11'), y: 15.09 },
    { x: new Date('2025-06-12'), y: 15.11 },
    { x: new Date('2025-06-14'), y: 15.16 },
    { x: new Date('2025-06-15'), y: 15.16 },
    { x: new Date('2025-06-16'), y: 15.20 },
    { x: new Date('2025-06-17'), y: 15.24 },
    { x: new Date('2025-06-18'), y: 15.23 },
    { x: new Date('2025-06-20'), y: 15.09 },
    { x: new Date('2025-06-21'), y: 15.09 },
    { x: new Date('2025-06-22'), y: 15.09 },
    { x: new Date('2025-06-23'), y: 15.09 },
    { x: new Date('2025-06-24'), y: 15.20 },
    { x: new Date('2025-06-25'), y: 15.20 },
    { x: new Date('2025-06-26'), y: 15.30 },
    { x: new Date('2025-06-27'), y: 15.21 },
    { x: new Date('2025-06-28'), y: 15.25 },
    { x: new Date('2025-06-29'), y: 15.25 },
    { x: new Date('2025-06-30'), y: 15.25 },
    { x: new Date('2025-07-01'), y: 15.20 },
    { x: new Date('2025-07-02'), y: 15.13 },
    { x: new Date('2025-07-04'), y: 15.11 },
    { x: new Date('2025-07-05'), y: 15.11 },
    { x: new Date('2025-07-06'), y: 15.11 },
    { x: new Date('2025-07-07'), y: 15.11 },
    { x: new Date('2025-07-08'), y: 15.33 },
    { x: new Date('2025-07-09'), y: 15.39 },
    { x: new Date('2025-07-10'), y: 15.37 },
    { x: new Date('2025-07-11'), y: 15.3777 },
    { x: new Date('2025-07-12'), y: 15.42 },
    { x: new Date('2025-07-13'), y: 15.4172 },
    { x: new Date('2025-07-14'), y: 15.387 },
    { x: new Date('2025-07-15'), y: 15.3634 },
    { x: new Date('2025-07-16'), y: 15.3159 },
    { x: new Date('2025-07-17'), y: 15.2267 },
    { x: new Date('2025-07-19'), y: 15.3751 },
    { x: new Date('2025-07-20'), y: 15.3759 },
    { x: new Date('2025-07-21'), y: 15.3739 },
    { x: new Date('2025-07-22'), y: 15.3783 },
    { x: new Date('2025-07-23'), y: 15.3986 },
    { x: new Date('2025-07-24'), y: 15.3875 },
    { x: new Date('2025-07-25'), y: 15.4167 },
    { x: new Date('2025-07-26'), y: 15.4996 },
    { x: new Date('2025-07-27'), y: 15.4963 },
    { x: new Date('2025-07-29'), y: 15.4645 },
    { x: new Date('2025-07-30'), y: 15.3877 },
    { x: new Date('2025-07-31'), y: 15.2860 },
    { x: new Date('2025-08-01'), y: 15.3928 },
    { x: new Date('2025-08-02'), y: 15.2825 },
    { x: new Date('2025-08-03'), y: 15.2857 },
    { x: new Date('2025-08-04'), y: 15.2659 },
    { x: new Date('2025-08-05'), y: 15.2225 },
    { x: new Date('2025-08-07'), y: 15.3142 },
    { x: new Date('2025-08-08'), y: 15.3620 },
    { x: new Date('2025-08-09'), y: 15.4133 },
    { x: new Date('2025-08-10'), y: 15.4091 },
    { x: new Date('2025-08-11'), y: 15.4135 },
    { x: new Date('2025-08-12'), y: 15.3720 },
    { x: new Date('2025-08-13'), y: 15.4562 },
    { x: new Date('2025-08-14'), y: 15.4345 },
    { x: new Date('2025-08-15'), y: 15.3786 },
    { x: new Date('2025-08-16'), y: 15.39 },
    { x: new Date('2025-08-18'), y: 15.4128 },
    { x: new Date('2025-08-19'), y: 15.4587 },
    { x: new Date('2025-08-20'), y: 15.4024 },
    { x: new Date('2025-08-21'), y: 15.3597 },
    { x: new Date('2025-08-22'), y: 15.4145 },
    { x: new Date('2025-08-23'), y: 15.449 },
    { x: new Date('2025-08-24'), y: 15.4473 },
    { x: new Date('2025-08-25'), y: 15.468 },
    { x: new Date('2025-08-26'), y: 15.435 },
    { x: new Date('2025-08-27'), y: 15.4161 },
    { x: new Date('2025-08-28'), y: 15.4484 },
    { x: new Date('2025-08-29'), y: 15.4922 },
    { x: new Date('2025-08-30'), y: 15.5285 },
    { x: new Date('2025-08-31'), y: 15.5224 },
    { x: new Date('2025-09-01'), y: 15.5518 },
    { x: new Date('2025-09-02'), y: 15.6623 },
    { x: new Date('2025-09-03'), y: 15.6979 },
    { x: new Date('2025-09-04'), y: 15.7094 },
    { x: new Date('2025-09-05'), y: 15.6817 },
    { x: new Date('2025-09-06'), y: 15.7049 },
    { x: new Date('2025-09-07'), y: 15.7052 },
    { x: new Date('2025-09-08'), y: 15.7837 },
    { x: new Date('2025-09-09'), y: 15.7574 },
    { x: new Date('2025-09-10'), y: 15.7008 },
    { x: new Date('2025-09-11'), y: 15.7682 },
    { x: new Date('2025-09-12'), y: 15.8018 },
    { x: new Date('2025-09-13'), y: 15.8247 },
    { x: new Date('2025-09-14'), y: 15.8251 },
    { x: new Date('2025-09-15'), y: 15.834 },
    { x: new Date('2025-09-16'), y: 15.8794 },
    { x: new Date('2025-09-17'), y: 15.8684 },
    { x: new Date('2025-09-18'), y: 15.8079 },
    { x: new Date('2025-09-19'), y: 15.8239 },
    { x: new Date('2025-09-20'), y: 15.7252 },
    { x: new Date('2025-09-21'), y: 15.728 },
    { x: new Date('2025-09-22'), y: 15.7217 },
    { x: new Date('2025-09-23'), y: 15.7759 },
    { x: new Date('2025-09-24'), y: 15.8189 },
    { x: new Date('2025-09-25'), y: 15.821 },
    { x: new Date('2025-09-26'), y: 15.8272 },
    { x: new Date('2025-09-27'), y: 15.8682 },
    { x: new Date('2025-09-28'), y: 15.8632 },
    { x: new Date('2025-09-29'), y: 15.8784 },
    { x: new Date('2025-09-30'), y: 15.7834 },
    { x: new Date('2025-10-01'), y: 15.7136 },
    { x: new Date('2025-10-02'), y: 15.6806 },
    { x: new Date('2025-10-03'), y: 15.6544 },
    { x: new Date('2025-10-04'), y: 15.7225 },
    { x: new Date('2025-10-05'), y: 15.7218 },
    { x: new Date('2025-10-06'), y: 15.8664 },
    { x: new Date('2025-10-06'), y: 15.8664 },
    { x: new Date('2025-10-07'), y: 15.9994 },
    { x: new Date('2025-10-08'), y: 16.1199 },
    { x: new Date('2025-10-09'), y: 16.1842 },
    { x: new Date('2025-10-10'), y: 16.0757 },
    { x: new Date('2025-10-11'), y: 15.9576 },
    { x: new Date('2025-10-12'), y: 15.967 },
    { x: new Date('2025-10-13'), y: 15.9798 },
    { x: new Date('2025-10-14'), y: 16.0155 },
    { x: new Date('2025-10-15'), y: 15.9192 },
    { x: new Date('2025-10-16'), y: 15.9462 },
    { x: new Date('2025-10-17'), y: 15.9579 },
    { x: new Date('2025-10-18'), y: 15.949 },
    { x: new Date('2025-10-20'), y: 15.9455 },
    { x: new Date('2025-10-21'), y: 15.9898 },
    { x: new Date('2025-10-22'), y: 16.108 },
    { x: new Date('2025-10-23'), y: 16.1373 },
    { x: new Date('2025-10-24'), y: 16.245 },
    { x: new Date('2025-10-25'), y: 16.2703 },
    { x: new Date('2025-10-26'), y: 16.2703 },
    { x: new Date('2025-10-27'), y: 16.2699 },
    { x: new Date('2025-10-28'), y: 16.3018 },
    { x: new Date('2025-10-29'), y: 16.2927 },
    { x: new Date('2025-10-30'), y: 16.2246 },
    { x: new Date('2025-10-31'), y: 16.2375 },
    { x: new Date('2025-11-01'), y: 16.25805049 },
    { x: new Date('2025-11-02'), y: 16.258 },
    { x: new Date('2025-11-03'), y: 16.2416 },
    { x: new Date('2025-11-04'), y: 16.2479 },
    { x: new Date('2025-11-05'), y: 16.04 },
    { x: new Date('2025-11-06'), y: 16.0905 },
    { x: new Date('2025-11-07'), y: 16.04419601 },
    { x: new Date('2025-11-08'), y: 16.0123 },
    { x: new Date('2025-11-09'), y: 16.0684 },
    { x: new Date('2025-11-10'), y: 16.0613 },
    { x: new Date('2025-11-11'), y: 16.0957 },
    { x: new Date('2025-11-12'), y: 16.1932 },
    { x: new Date('2025-11-13'), y: 16.2808 },
    { x: new Date('2025-11-14'), y: 16.3709 },
    { x: new Date('2025-11-15'), y: 16.4309 },
    { x: new Date('2025-11-16'), y: 16.3433 },
    { x: new Date('2025-11-17'), y: 16.3433 },
    { x: new Date('2025-11-18'), y: 16.3522 },
    { x: new Date('2025-11-19'), y: 16.3826 },
    { x: new Date('2025-11-20'), y: 16.4014 },
    { x: new Date('2025-11-21'), y: 16.4441 },
    { x: new Date('2025-11-22'), y: 16.4911 },
    { x: new Date('2025-11-23'), y: 16.3744 },
    { x: new Date('2025-11-24'), y: 16.3744 },
    { x: new Date('2025-11-25'), y: 16.4312 },
    { x: new Date('2025-11-26'), y: 16.4312 },
    { x: new Date('2025-11-27'), y: 16.3646 },
    { x: new Date('2025-11-28'), y: 16.4509 },
    { x: new Date('2025-11-29'), y: 16.4846 },
    { x: new Date('2025-11-30'), y: 16.4889 },
    { x: new Date('2025-12-01'), y: 16.5104 },
    { x: new Date('2025-12-02'), y: 16.4472 },
    { x: new Date('2025-12-03'), y: 16.5097 },
    { x: new Date('2025-12-04'), y: 16.5466 },
    { x: new Date('2025-12-05'), y: 16.4596 },
    { x: new Date('2025-12-06'), y: 16.505 },
    { x: new Date('2025-12-07'), y: 16.5043 },
    { x: new Date('2025-12-08'), y: 16.5123 },
    { x: new Date('2025-12-09'), y: 16.5693 },
    { x: new Date('2025-12-10'), y: 16.7377 },
    { x: new Date('2025-12-11'), y: 16.7976 },
    { x: new Date('2025-12-12'), y: 16.8096 },
    { x: new Date('2025-12-13'), y: 16.808 },
    { x: new Date('2025-12-14'), y: 16.809 },
    { x: new Date('2025-12-15'), y: 16.8035 },
    { x: new Date('2025-12-16'), y: 16.7074 },
    { x: new Date('2025-12-17'), y: 16.6426 },
    { x: new Date('2025-12-18'), y: 16.7039 },
    { x: new Date('2025-12-19'), y: 16.7535 },
    { x: new Date('2025-12-20'), y: 16.9626 },
    { x: new Date('2025-12-21'), y: 16.9483 },
    { x: new Date('2025-12-22'), y: 16.9922 },
    { x: new Date('2025-12-23'), y: 16.9982 },
    { x: new Date('2025-12-24'), y: 17.0217 },
    { x: new Date('2025-12-25'), y: 17.0074 },
    { x: new Date('2025-12-26'), y: 17.0002 },
    { x: new Date('2025-12-27'), y: 17.0676 },
    { x: new Date('2025-12-29'), y: 17.0723 },
    { x: new Date('2025-12-30'), y: 17.0835 },
    { x: new Date('2025-12-31'), y: 16.999 },
    { x: new Date('2026-01-01'), y: 16.9965 },
    { x: new Date('2026-01-02'), y: 17.007 },
    { x: new Date('2026-01-03'), y: 17.0239 },
    { x: new Date('2026-01-04'), y: 17.017 },
    { x: new Date('2026-01-05'), y: 17.0156 },
    { x: new Date('2026-01-06'), y: 17.0058 },
    { x: new Date('2026-01-07'), y: 17.0228 },
    { x: new Date('2026-01-08'), y: 17.0255 },
    { x: new Date('2026-01-09'), y: 17.047 },
    { x: new Date('2026-01-10'), y: 17.0052 },
    { x: new Date('2026-01-11'), y: 17.1236 },
    { x: new Date('2026-01-12'), y: 17.1213 },
    { x: new Date('2026-01-13'), y: 17.1445 },
    { x: new Date('2026-01-14'), y: 17.2282 },
    { x: new Date('2026-01-15'), y: 17.2632 },
    { x: new Date('2026-01-16'), y: 17.2274 },
    { x: new Date('2026-01-17'), y: 17.2053 },
    { x: new Date('2026-01-18'), y: 17.129 },
    { x: new Date('2026-01-19'), y: 17.1288 },
    { x: new Date('2026-01-20'), y: 17.1052 },
    { x: new Date('2026-01-21'), y: 17.1617 },
    { x: new Date('2026-01-22'), y: 17.3082 },
    { x: new Date('2026-01-23'), y: 17.3689 },
    { x: new Date('2026-01-24'), y: 17.5612 },
    { x: new Date('2026-01-25'), y: 17.4651 },
    { x: new Date('2026-01-26'), y: 17.4759 },
    { x: new Date('2026-01-27'), y: 17.4514 },
    { x: new Date('2026-01-28'), y: 17.2379 },
    { x: new Date('2026-01-29'), y: 17.3145 },
    { x: new Date('2026-01-30'), y: 17.3317 },
    { x: new Date('2026-01-31'), y: 17.3626 },
    { x: new Date('2026-02-01'), y: 17.3907 },
    { x: new Date('2026-02-02'), y: 17.3888 },
    { x: new Date('2026-02-03'), y: 17.4102 },
    { x: new Date('2026-02-04'), y: 17.3428 },
    { x: new Date('2026-02-05'), y: 17.4649 },
    { x: new Date('2026-02-06'), y: 17.4586 },
    { x: new Date('2026-02-07'), y: 17.351 },
    { x: new Date('2026-02-08'), y: 17.3993 },
    { x: new Date('2026-02-09'), y: 17.392 },
    { x: new Date('2026-02-10'), y: 17.429 },
    { x: new Date('2026-02-11'), y: 17.4613 },
    { x: new Date('2026-02-12'), y: 17.3714 },
    { x: new Date('2026-02-13'), y: 17.2341 },
    { x: new Date('2026-02-14'), y: 17.1421 },
    { x: new Date('2026-02-15'), y: 17.1184 },
    { x: new Date('2026-02-16'), y: 17.121 },
    { x: new Date('2026-02-17'), y: 17.1161 },
    { x: new Date('2026-02-18'), y: 17.1677 },
    { x: new Date('2026-02-19'), y: 17.0619 },
    { x: new Date('2026-02-20'), y: 17.129 },
    { x: new Date('2026-02-21'), y: 17.0933 },
    { x: new Date('2026-02-22'), y: 17.1126 },
    { x: new Date('2026-02-23'), y: 17.1097 },
    { x: new Date('2026-02-24'), y: 17.1181 },
    { x: new Date('2026-02-25'), y: 17.0541 },
    { x: new Date('2026-02-26'), y: 17.2085 },
    { x: new Date('2026-02-27'), y: 17.3122 },
    { x: new Date('2026-02-28'), y: 17.2392 },
    { x: new Date('2026-03-01'), y: 17.2705 },
    { x: new Date('2026-03-02'), y: 17.2608 },
    { x: new Date('2026-03-03'), y: 17.243 },
    { x: new Date('2026-03-04'), y: 17.188 },
    { x: new Date('2026-03-05'), y: 17.0293 },
    { x: new Date('2026-03-06'), y: 17.1149 },
    { x: new Date('2026-03-07'), y: 17.0737 },
    { x: new Date('2026-03-08'), y: 17.1297 },
    { x: new Date('2026-03-09'), y: 17.1168 },
    { x: new Date('2026-03-10'), y: 17.1092 },
    { x: new Date('2026-03-11'), y: 17.1904 },
    { x: new Date('2026-03-12'), y: 17.2412 },
    { x: new Date('2026-03-13'), y: 17.2196 },
    { x: new Date('2026-03-14'), y: 17.0598 },
    { x: new Date('2026-03-15'), y: 16.9195 },
    { x: new Date('2026-03-16'), y: 16.9233 },
    { x: new Date('2026-03-17'), y: 16.8791 },
    { x: new Date('2026-03-18'), y: 17.0034 },
    { x: new Date('2026-03-19'), y: 17.1223 },
    { x: new Date('2026-03-20'), y: 16.9142 },
    { x: new Date('2026-03-21'), y: 16.9762 },
    { x: new Date('2026-03-22'), y: 17.015 },
    { x: new Date('2026-03-23'), y: 17.013 },
    { x: new Date('2026-03-24'), y: 17.0263 },
    { x: new Date('2026-03-25'), y: 16.978 },
    { x: new Date('2026-03-26'), y: 17.0247 },
    { x: new Date('2026-03-27'), y: 17.0475 },
    { x: new Date('2026-03-28'), y: 16.9543 },
    { x: new Date('2026-03-29'), y: 16.9294 },
    { x: new Date('2026-03-30'), y: 16.93 },
    { x: new Date('2026-03-31'), y: 16.9258 },
    { x: new Date('2026-04-01'), y: 16.7251 },
    { x: new Date('2026-04-02'), y: 16.88951792 },
    { x: new Date('2026-04-03'), y: 16.8624 },
    { x: new Date('2026-04-04'), y: 16.8792 },
    { x: new Date('2026-04-05'), y: 16.8468 },
    { x: new Date('2026-04-06'), y: 16.8411 },
    { x: new Date('2026-04-07'), y: 16.8541 },
    { x: new Date('2026-04-08'), y: 16.9009 },
    { x: new Date('2026-04-09'), y: 16.8529 },
    { x: new Date('2026-04-10'), y: 17.0384 },
    { x: new Date('2026-04-11'), y: 17.1145 },
    { x: new Date('2026-04-12'), y: 17.1726 },
    { x: new Date('2026-04-13'), y: 17.1637 },
    { x: new Date('2026-04-14'), y: 17.1161 },
    { x: new Date('2026-04-15'), y: 17.2813 },
    { x: new Date('2026-04-16'), y: 17.3074 },
    { x: new Date('2026-04-17'), y: 17.3196 },
    { x: new Date('2026-04-18'), y: 17.3225 },
    { x: new Date('2026-04-19'), y: 17.3224 },
    { x: new Date('2026-04-20'), y: 17.328 },
    { x: new Date('2026-04-21'), y: 17.3112 },
    { x: new Date('2026-04-22'), y: 17.3889 },
    { x: new Date('2026-04-23'), y: 17.3683 },
    { x: new Date('2026-04-24'), y: 17.3201 },
    { x: new Date('2026-04-25'), y: 17.2633 },
    { x: new Date('2026-04-26'), y: 17.2652 },
    { x: new Date('2026-04-27'), y: 17.2655 },
    { x: new Date('2026-04-28'), y: 17.2587 },
    { x: new Date('2026-04-29'), y: 17.2946 },
    { x: new Date('2026-04-30'), y: 17.2189 },
    { x: new Date('2026-05-01'), y: 17.2189 }];

const options = {
    chart: {
        type: 'area',
        height: 300,
        toolbar: { show: false },
        zoom: { enabled: false }
    },
    series: [{ name: '', data: fullData }],
    xaxis: {
        type: 'datetime'
    },
    yaxis: {
        tickAmount: 7,
        labels: {
            formatter: val => `${val.toLocaleString('ja-JP')}円`,
            offsetX: -17
        }
    },
    grid: {
        padding: {
            left: -10,
            right: 0
        }
    },
    tooltip: {
        x: {
                formatter: val => {
                    const date = new Date(val);
                    return new Intl.DateTimeFormat('ja-JP', {
                        year: 'numeric',
                        month: 'long',
                        day: 'numeric',
                        weekday: 'short'
                }).format(date);
            }
        },
        y: {
            formatter: val => `${val.toLocaleString('ja-JP')}円`
        }
    },
    stroke: {
        curve: 'smooth',
        width: 2
    },
    fill: {
        type: 'gradient',
        gradient: {
            shadeIntensity: 1,
            opacityFrom: 0.8,
            opacityTo: 0,
            stops: [0, 90, 100]
        }
    },
    colors: ['#007bff'],
    legend: { show: false },
    dataLabels: { enabled: false }
};

const chart = new ApexCharts(document.querySelector("#chart"), options);
chart.render();

function updateChart(months) {
    const sortedData = [...fullData].sort((a, b) => a.x - b.x);
    const latestDate = sortedData[sortedData.length - 1].x;

    const start = new Date(latestDate);
    start.setMonth(start.getMonth() - months);

    const startTime = start.getTime();

    const filtered = fullData.filter(item =>
        item.x >= startTime && item.x <= latestDate
    );

    chart.updateSeries([{ name: '', data: filtered }], true);

    chart.updateOptions({
        xaxis: {
            type: 'datetime',
            min: startTime,
            max: latestDate
        }
    });
}

document.querySelectorAll('.filter-btn').forEach(btn => {
    btn.addEventListener('click', () => {
        document.querySelectorAll('.filter-btn').forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        const months = parseInt(btn.dataset.months);
        updateChart(months);
    });
});
updateChart(1);