1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

//! Module that implements the decode_cf method for `i32`, `i64`, `f32`, `f64`,  `Vec<i32>`, `Vec<i64>`, `Vec<f32>` and `Vec<f64>`.

use crate::utils::get_datetime_and_unit_from_units;
use crate::{calendars::Calendar, datetime::CFDatetime};
pub trait CFDecoder {
    fn decode_cf(
        &self,
        units: &str,
        calendar: Calendar,
    ) -> Result<CFDatetime, crate::errors::Error>;
}

macro_rules! impl_cf_decoder {
    ($type:ty) => {
        impl CFDecoder for $type {
            fn decode_cf(
                &self,
                units: &str,
                calendar: Calendar,
            ) -> Result<CFDatetime, crate::errors::Error> {
                let (cf_datetime, unit) = get_datetime_and_unit_from_units(units, calendar)?;
                let duration = unit.to_duration(calendar);
                let result = (&cf_datetime + (&duration * *self))?;

                Ok(result)
            }
        }
    };
}

impl_cf_decoder!(i64);
impl_cf_decoder!(i32);
impl_cf_decoder!(f32);
impl_cf_decoder!(f64);

pub trait VecCFDecoder {
    fn decode_cf(
        &self,
        units: &str,
        calendar: Calendar,
    ) -> Result<Vec<CFDatetime>, crate::errors::Error>;
}

macro_rules! impl_vec_cf_decoder {
    ($type:ty) => {
        impl VecCFDecoder for Vec<$type> {
            fn decode_cf(
                &self,
                units: &str,
                calendar: Calendar,
            ) -> Result<Vec<CFDatetime>, crate::errors::Error> {
                let (cf_datetime, unit) = get_datetime_and_unit_from_units(units, calendar)?;
                let duration = unit.to_duration(calendar);
                let mut datetimes = Vec::with_capacity(self.len());
                for value in self {
                    let new_datetime = &cf_datetime + (&duration * *value);
                    datetimes.push(new_datetime?);
                }

                Ok(datetimes)
            }
        }
    };
}

impl_vec_cf_decoder!(i64);
impl_vec_cf_decoder!(i32);
impl_vec_cf_decoder!(f32);
impl_vec_cf_decoder!(f64);

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_decode_i64_cf_with_hms() {
        let to_decode = 2;
        let units = "days since 2000-01-01 00:00:00";
        let calendar = Calendar::Standard;

        let result = to_decode.decode_cf(units, calendar);

        // Assert
        assert!(result.is_ok());
        let cf_datetime = result.unwrap();
        let (year, month, day, hour, minute, second) = cf_datetime.ymd_hms().unwrap();
        assert_eq!(
            (year, month, day, hour, minute, second),
            (2000, 1, 3, 0, 0, 0)
        );
    }
    #[test]
    fn test_decode_f64_cf_with_hms() {
        let to_decode: f64 = 2.0;
        let units = "hours since 2000-01-01 00:00:00";
        let calendar = Calendar::Standard;

        let result = to_decode.decode_cf(units, calendar);

        // Assert
        assert!(result.is_ok());
        let cf_datetime = result.unwrap();
        let (year, month, day, hour, minute, second) = cf_datetime.ymd_hms().unwrap();
        assert_eq!(
            (year, month, day, hour, minute, second),
            (2000, 1, 1, 2, 0, 0)
        );
    }

    #[test]
    fn test_decode_i32_vec_cf_with_hms() {
        let to_decode = vec![0, 1, 2];
        let units = "days since 2000-01-01 00:00:00";
        let calendar = Calendar::Standard;

        let datetimes_result = to_decode.decode_cf(units, calendar);

        // Assert
        assert!(datetimes_result.is_ok());
        let datetimes = datetimes_result.unwrap();
        for (i, datetime) in datetimes.iter().enumerate() {
            let (year, month, day, hour, minute, second) = datetime.ymd_hms().unwrap();
            assert_eq!(
                (year, month, day, hour, minute, second),
                (2000, 1, (i + 1) as u8, 0, 0, 0)
            );
        }
    }
    #[test]
    fn test_decode_f64_vec_cf_with_hms() {
        let to_decode: Vec<f64> = vec![1.0, 1.25, 1.50, 1.75, 2.0];
        let units = "hours since 2000-01-01 00:00:00";
        let calendar = Calendar::Standard;

        let datetimes_result = to_decode.decode_cf(units, calendar);

        // Assert
        assert!(datetimes_result.is_ok());
        let datetimes = datetimes_result.unwrap();
        let (year, month, day, hour, minute, second) = datetimes[0].ymd_hms().unwrap();
        assert_eq!(
            (year, month, day, hour, minute, second),
            (2000, 1, 1, 1, 0, 0)
        );
        let (year, month, day, hour, minute, second) = datetimes[1].ymd_hms().unwrap();
        assert_eq!(
            (year, month, day, hour, minute, second),
            (2000, 1, 1, 1, 15, 0)
        );
        let (year, month, day, hour, minute, second) = datetimes[2].ymd_hms().unwrap();
        assert_eq!(
            (year, month, day, hour, minute, second),
            (2000, 1, 1, 1, 30, 0)
        );
        let (year, month, day, hour, minute, second) = datetimes[3].ymd_hms().unwrap();
        assert_eq!(
            (year, month, day, hour, minute, second),
            (2000, 1, 1, 1, 45, 0)
        );
        let (year, month, day, hour, minute, second) = datetimes[4].ymd_hms().unwrap();
        assert_eq!(
            (year, month, day, hour, minute, second),
            (2000, 1, 1, 2, 0, 0)
        );
    }
    // Add more test cases for other scenarios as needed
}