// Copyright (c) 2019, Drone IO Inc.
// Copyright (c) 2021, Robert Kaussow <mail@thegeeklab.de>

package yaml

import filepath "github.com/bmatcuk/doublestar/v4"

// Conditions defines a group of conditions.
type Conditions struct {
	Action   Condition         `json:"action,omitempty"`
	Cron     Condition         `json:"cron,omitempty"`
	Ref      Condition         `json:"ref,omitempty"`
	Repo     Condition         `json:"repo,omitempty"`
	Instance Condition         `json:"instance,omitempty"`
	Target   Condition         `json:"target,omitempty"`
	Event    Condition         `json:"event,omitempty"`
	Branch   Condition         `json:"branch,omitempty"`
	Status   Condition         `json:"status,omitempty"`
	Paths    Condition         `json:"paths,omitempty"`
	Matrix   map[string]string `json:"matrix,omitempty"`
}

// Condition defines a runtime condition.
type Condition struct {
	Include []string `yaml:"include,omitempty" json:"include,omitempty"`
	Exclude []string `yaml:"exclude,omitempty" json:"exclude,omitempty"`
}

// Match returns true if the string matches the include
// patterns and does not match any of the exclude patterns.
func (c *Condition) Match(v string) bool {
	if c.Excludes(v) {
		return false
	}

	if c.Includes(v) {
		return true
	}

	if len(c.Include) == 0 {
		return true
	}

	return false
}

// Includes returns true if the string matches the include
// patterns.
func (c *Condition) Includes(v string) bool {
	for _, pattern := range c.Include {
		if ok, _ := filepath.Match(pattern, v); ok {
			return true
		}
	}

	return false
}

// Excludes returns true if the string matches the exclude
// patterns.
func (c *Condition) Excludes(v string) bool {
	for _, pattern := range c.Exclude {
		if ok, _ := filepath.Match(pattern, v); ok {
			return true
		}
	}

	return false
}

// UnmarshalYAML implements yml unmarshalling.
func (c *Condition) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var (
		out1 string
		out2 []string
	)

	out3 := struct {
		Include []string
		Exclude []string
	}{}

	err := unmarshal(&out1)
	if err == nil {
		c.Include = []string{out1}

		return nil
	}

	_ = unmarshal(&out2)
	_ = unmarshal(&out3)

	out3.Include = append(
		out3.Include,
		out2...,
	)

	c.Exclude = out3.Exclude
	c.Include = out3.Include

	return nil
}